Surgical Treatments for Sleep Apnea
Surgical Treatments for Sleep Apnea
Tre a t m e n t o f O b s t r u c t i v e
Sleep Apnea
                               a,                                             b
Jon-Erik C. Holty,    MD, MS        *, Christian Guilleminault,   MD, DBiol
 KEYWORDS
  Obstructive sleep apnea  Sleep apnea syndromes  Surgery
         Effective surgical therapies for OSA predate the first reported use of CPAP by Sulli-
      van and colleagues9 in 1981 and Rapoport and colleagues18 in 1982. Tracheostomy
      was employed as early as 196919 and Kuo and colleagues20 in 1979 (and later Bear
      and Priest21 in 1980) reported the results of mandibular advancement for the treatment
      of OSA. In 1952, Ikematsu22 began removing excessive oropharyngeal tissue to alle-
      viate snoring and reported the results of his palatopharynoplasty with partial uvulec-
      tomy in 152 habitual snorers in 1962. In the late 1970s, Fujita and colleagues23
      adapted Ikematsu’s procedure and introduced the uvulopalatopharyngoplasty as
      a new surgical approach to treat OSA.24 Because the anatomic cause of OSA is
      heterogeneous with most OSA patients having multiple concurrent pharyngeal abnor-
      malities,25–27 surgical procedures have evolved to address specific anatomic airflow
      limitations and to augment the effectiveness of existing procedures. This review
      describes the pathophysiology of OSA, the rationale for surgery, and the various
      surgical techniques used to treat OSA.
PATHOPHYSIOLOGY OF OSA
      Patients with OSA have nocturnal airflow restriction resulting from upper-airway
      collapse between the naso- and hypopharynx.28 During normal breathing, contraction
      of the diaphragm results in an increased thoracic volume that generates negative
      intrapleural pressure drawing air down to the alveoli. During a normal negative pres-
      sure inspiration, upper-airway reflexes phasically activate pharyngeal muscles (eg,
      genioglossus, tensor palatini, geniohyoid, stylohyoid) to dilate and stiffen the upper
      airway to maintain patency.29–32 Pharyngeal dilator muscle activity is reduced in
      normal and OSA individuals during sleep.30,33 However, patients with OSA have
      anatomically smaller upper airways and diminished pharyngeal dilator tone resulting
      in clinically significant airflow limitation (eg, apneas and hypopneas) during nocturnal
      negative pressure inspiration.28,34,35 Most individuals with OSA have multiple pharyn-
      geal abnormalities25 with anatomic airway narrowing primarily in the lateral
      dimension.36,37
         In addition, patients with OSA are often obligatory mouth breathers during sleep.38
      Nasal breathing (compared with mouth breathing) is more efficient because the nasal
      cavity has a more constant resistance (compared with the oral cavity) and because
      stimulation of nasal receptors is involved in activating the pharyngeal dilators.39 In
      normal individuals, a transition from nasal to oral breathing results in a greater risk
      of pharyngeal collapse because of greater negative inspiratory pressures needed to
      overcome increased airway resistance.39 Experimental nasal obstruction40–42 or inhib-
      iting the nasopharyngeal reflex (by applying topical anesthesia)43 causes nocturnal
      apneas, hypopneas, and oxygen desaturation in normal individuals.
         OSA is in part a neurologic disorder of the upper airway.30,33,44,45 Pharyngeal
      collapse is often caused by abnormal activation of pharyngeal dilator muscles from
      dysfunctional pharyngeal reflexes.46 In patients with nocturnal upper-airway resis-
      tance, repetitive vibratory trauma (eg, snoring) and tremendous swings in pharyngeal
      pressures (caused by apneas and hypopneas) during sleep results in pathologic injury
      to the pharyngeal dilator muscles and nerves.33,47,48 This irreversible damage predis-
      poses the upper airway to inspiratory collapse during sleep.45,49–51
      The aim of OSA surgery is to eliminate airway collapse and reduce airway resistance
      during sleep without causing impairment to the normal functions of the upper airway
      and associated structures. Indications for surgery depend on: (1) the severity of OSA
                                                                   OSA Surgical Treatment     481
and comorbid medical conditions; (2) the severity of symptoms (eg, excessive daytime
sleepiness); and (3) the anatomic location(s) causing obstruction. General indications
for surgery include moderate-severe OSA, severe excessive daytime sleepiness (even
when the AHI is %20/h), OSA with comorbid conditions (eg, arrhythmias, hyperten-
sion), OSA with anatomic airway abnormalities, and failure of medical OSA manage-
ment.52 Upper-airway abnormalities amenable to surgery include those within the
nasal cavity (eg, deviated septum, polyps, hypertrophic turbinates, collapsible nasal
valves), nasopharynx (eg, stenosis, adenoids), oropharynx (eg, palatine tonsils, elon-
gated uvula, redundant mucosal folds, low hanging palate, webbing), and hypo-
pharynx (eg, lingual tonsils, large tongue base, redundant aryepiglottic folds)
(Table 1). Relative contraindications to surgery include morbid obesity (except for
bariatric surgery and tracheostomy), severe or unstable cardiopulmonary disease,
active alcohol/illicit drug abuse, older age, unstable psychological problems, or unre-
alistic expectations from surgical therapy.
   All adult OSA patients should be offered a nonsurgical treatment option (eg, CPAP)
before proceeding to surgery. Even in patients electing to proceed directly to surgery,
a trial of CPAP therapy may be helpful as this is a noninvasive means to determine the
expected extent of symptom abatement after surgery. Preoperative CPAP is indicated
in patients with severe OSA (AHI >40/h with severe nocturnal oxygen desaturation
<80%) and should be continued postoperatively until 2 weeks before the postopera-
tive polysomnogram.53
   In children, early recognition of OSA and prompt correction of anatomic upper-
airway abnormalities is paramount. By the age of 4 years, 60% of the adult craniofacial
skeleton is attained, with 90% by age 12 years.54–56 Children with pharyngeal obstruc-
tion (eg, tonsillar hypertrophy, turbinate enlargement) protect the patency of the
airway by sleeping in the prone or side position with an extended, flexed head, and
an anteriorally displaced tongue.57 Anterior displacement of the tongue is associated
with narrower upper and shorter lower dental arches,57–61 posterior displacement of
the mandible,60,62 with resultant development of mandibular retrusion, increased over-
jet, and facial height63–68 (all known risk factors for OSA).58,69 Thus, early recognition
 Table 1
 Anatomic location of pharyngeal obstruction in relationship to surgical procedure
SURGICAL SUCCESS
      Various surgical procedures are now available to increase the posterior airspace and
      treat OSA in CPAP intolerant patients. However, no surgical treatment is 100% effec-
      tive. Similar to previous reviews of OSA surgery,74,75 we defined surgical success as
      an AHI less than 20 and a reduction in AHI of 50% or more after surgery.76 Where
      possible, we provide surgical cure rates (defined as an AHI <5/h in adults and <1/h
      in children).77
      Individual surgical procedures are described in the following sections for the treatment
      of OSA organized by the treatment effect on the anatomic airway obstruction (eg,
      bypassing the upper airway obstruction, removal of soft tissue structures, or skeletal
      (or soft tissue) modification) (see Table 1).
      Procedures that Bypass the Upper Airway Obstruction
      Tracheostomy
      In 1965, Valero and Alroy78 reported improvement in nocturnal oxygenation in a patient
      with progressive respiratory failure secondary to traumatic micrognathia. Kuhlo and
      colleagues in 196919 followed by Lugaresi and colleagues in 197079,80 were the first
      to effectively treat OSA (or Pickwickian syndrome) by means of a tracheostomy. By
      bypassing the upper airway, tracheostomy is purported to be curative for OSA.81
      Although many studies purport resolution of airway obstruction after tracheos-
      tomy,82–85 relatively few studies report pre- and posttracheostomy polysomnography
      parameters (eg, AHI) (Table 2).81,86–91
         The largest case series (n 5 50) reported complete resolution of obstructive
      apneas after tracheostomy.81 Of 9 studies evaluating 61 patients, tracheostomy
      was highly effective at eliminating obstructive apneas (apnea index went from
 Table 2
 Efficacy of tracheostomy for OSAa
Abbreviations: N, number; NREM, nonrapid eye movement sleep; REM, rapid eye movement sleep; Trach, tracheostomy.
 a
   Mean (or percent)  standard deviation. – denotes not reported.
 b
   The apnea index is the average number of obstructive apneas per hour during sleep.
 c
   The AHI is the average number of obstructive apneas and hypopneas per hour during sleep.
 d
   P-value calculated via an extended t-test and evaluates pre- and posttracheostomy measures.
                                                                                                                                                                           483
484   Holty & Guilleminault
      88/h before to 0.5/h after tracheostomy; P<.001) (see Table 2). However, patients
      may have persistent hypopneas with a surgical success rate of approximately
      73% (see Tables 2 and 3). Rodman and Martin92 reported persistent (although
      generally improved) obstructive apneas and oxygen desaturations in 3 morbidly
      obese patients after tracheostomy caused by kinking of the tracheostomy tube
      during sleep or external obstruction by the patient’s own soft tissues. Haapaniemi
      and colleagues86 reported that although obstructive apneas improved after trache-
      ostomy (mean follow-up 5.1 years), most patients had persistent oxygen desatura-
      tions with many having oxygen dip indexes (R4%) of R15/h. Fletcher and
      Brown93 reported persistent REM-associated desaturations after tracheostomy in
      patients with OSA with concomitant chronic obstructive pulmonary disease.
      Despite improvements in obstructive apneas after tracheostomy, emergence or
      worsening of central apneas is frequently observed, although generally resolves
      within 3 to 6 months.80,81,89,94–98
         Tracheostomy is effective at preventing OSA-related arrhythmias,98–100 reducing
      pulmonary artery pressures,80,81,101 and improving hypertension81,88,100–103 and
      diabetes102 in patients with OSA. Many (but not all)86 studies have reported near complete
      resolution of nocturnal symptoms and daytime sleepiness.80,81,84,90,91,96,100,101,103–106 A
      retrospective analysis by He and colleagues107 suggested a mortality benefit of tracheos-
      tomy (0% vs 38% mortality at 8 years) compared with no OSA therapy. Partinen and
      colleagues108,109 found similar mortality benefits (0% vs 11% at 5 years) after
      tracheostomy.
         Unfortunately, tracheostomy has several problems including patient dissatisfaction
      (eg, psychosocial aspects), perioperative complications (eg, wound infection, tissue
      necrosis, bleeding), recurrent bronchitis, granulation tissue, trachea-innominate fistula
      formation, and stoma stenosis (often requiring surgical revision).105,110–115 Periopera-
      tive mortality is higher in obese individuals than in nonobese individuals.116 Permanent
      tracheostomy (either tube111 or tube-free117) is currently used in highly select cases
      with severe OSA who are intolerant of CPAP (and poor candidates for other surgical
      procedures). A temporary tracheostomy is occasionally used before other OSA proce-
      dures (eg, uvulopalatopharyngoplasty, bariatric surgery) to protect the airway, partic-
      ularly in morbidly obese subjects.118
         Closure of a permanent tracheostomy (after resolution of OSA by other surgeries or
      weight loss119) may be associated with a relatively high complication rate (w30%),
      especially when done with a 3-layer as opposed to a de-epithelialization tech-
      nique.120,121 In addition, long-term tracheostomy may cause pharyngeal tissue
      obstruction (eg, granulation tissue, tracheomalacia) that may predispose to OSA after
      closure.122,123
                             Demographics                                                          AHIb
  Study                                   N       Studies    Age (y)       Before Surgery    After Surgery    % Change          Cure (%)c   Success (%)c   Ref.
                      f                                                                                                                                    338,339
  Bariatric surgery                       437     16         38.8  14.9   53.3  38.2       15.3  18.7          72.6  60.6   44          –
                                                                                                                                                           134
  GA                                      91      4          –             53.9              17.3                 67.8          –           62
                                                                                                                                                           134
  HS                                      101     4          –             38.7              25.0                 33.0          –           50
                                                                                                                                                           134
  HS and GA (or mortised genioplasty)     328     7          –             33.5              15.2                 58.0          –           55
                                                                                                                                                           77
  LAUP                                    72      3          –             –                 –                –                 7           49
                                                                                                                                                           266
  MMA                                     627     22         44.4  9.4    63.9  26.7       9.5  10.7           85.0  18.2   43          86
                                                                                                                                                           134
  Midline glossectomy                     74      5          –             53.0              24.2                 54.4          –           50
                                                                                                                                                           134
  Radiofrequency ablation (tongue)        394     11         –             37.0              23.4                 35.7          –           36
  RME
                                                                                                                                                           320
    Children                              88      3          7.1  0.7     10.9  4.7        0.8  1.3            91.0  20.2   –           –
             d                                                                                                                                             321
    Adults                                10      1          27.0  0.6    19.0  1.3        7.0  1.3            63.2  7.1    70          90
                                                                                                                                                           177,178
  Tonsillectomy                           1,079   23         6.5           18.6              4.9                  73.7          60          –
                                                                                                                                                           134
  Tongue base suspension                  77      6                        29.0              16.3                 32.9          –           35
                  e                                                                                                                                        87,96
  Tracheostomy                            33      2          47.2  10.4   98.9  36.0       26.2  29.2          79.2  25.8   –           73
                                                                                                                                                           75,77
  UPPP                                    992     37         48.1          60.0              –                    38.2          16          52
  Multimodality surgeryg                  1,978   58         46.2          48.0              –                    60.3          –           66             74
                                                                                                                                                                      485
486   Holty & Guilleminault
      Midline glossectomy
      Surgical removal of the center portion of the tongue base (usually via laser) was
      proposed by Fujita and colleagues132 and Woodson and Fujita133 in 1991 for the treat-
      ment of OSA in patients with hyopharyngeal obstruction. A review of 5 case series (n 5
      74) showed a surgical success rate of approximately 50% (see Table 3).134 Postoper-
      ative bleeding and pharyngeal edema requiring protective tracheostomy is not
      uncommon after surgery.132,133
      Radiofrequency ablation of the tongue
      Radiofrequency ablation uses a probe to precisely direct temperature-controlled
      radiofrequency energy to heat (between 60 and 90 C) and ablate target tissues
      without causing collateral damage to adjoining structures.135 Radiofrequency treat-
      ment of the tongue base does not require general anesthesia, but usually requires
      multiple treatment sessions over several weeks, and is successful at eliminating
      snoring.135–137 Eleven case series describing 394 patients with OSA (mean AHI 37/h)
      undergoing radiofrequency ablation of the tongue reported a surgical success rate
      of only 36% (see Table 3).134 Statistically significant improvements in subjective
      daytime sleepiness and health-related quality of life were observed in most, but not
      all studies.135,138–145 Radiofrequency ablation of the tongue is generally considered
      adjunctive (not primary) OSA treatment in select patients.134
Uvulopalatopharyngoplasty
Fujita and colleagues23 and Conway and colleagues24 adapted Ikematsu’s surgical
snoring procedure22 and reported his uvulopalatopharyngoplasty (UPPP) results for
treating OSA in 1980. This operation enlarges the oropharyngeal airway lumen by
Fig. 1. Tonsillectomy. The primary treatment of OSA in children with tonsillar enlargement is
tonsillectomy usually with concurrent adenoidectomy. To prevent collapse and improve OSA
success, it is preferable that the lateral pharyngeal walls are sutured.
488   Holty & Guilleminault
      excising redundant tissues from the soft palate, tonsillar pillars, and uvula (Fig. 2).
      UPPP is currently the most widely performed OSA pharyngeal surgical technique in
      adults.77 Several variations of the UPPP have been proposed including the methods
      of Fujita and colleagues,23,192,193 Simmons and colleagues,194 Fairbanks,195 Dickson
      and Blokmanis,196 Friedman and colleagues,197 and Powell and colleagues198 (uvulo-
      palatal flap surgery). Uvulopalatal flap surgery (Fig. 3) reduces the risk of nasopharyn-
      geal incompetence and is associated with less postoperative pain, but is
      contraindicated in patients with excessively long or bulky soft palates (or
      uvulas).199–201 Woodson and Toohill202 developed transpalatal advancement phar-
      yngoplasty, which combines a UPPP with removal of the posterior hard palate (via
      a curvilinear palatal incision), with subsequent advancement of the mucoperiosteal
      flap and suturing to the alveolar mucoperiosteum (Fig. 4). This technique is associated
      with a decrease in retropalatal collapsibility and an increase in the retropalatal
      airspace compared with traditional UPPP, and may provide higher surgical success
      and cure rates.201,203
         There are no known randomized controlled trials of UPPP that assess pre- and post-
      surgery AHI,74,204,205 and many studies do not report objective postsurgery sleep
      data.206 One randomized trial found no statistically significant difference in the oxygen
      desaturation index between the surgery and conservative management groups.204,207
      UPPP is highly effective for eliminating snoring, with success rates between 70% and
      90%.193 However, several meta-analysis have reported surgical success rates for
      OSA between 40% and 60%, and a surgical cure rate (an AHI <5/h) of only 16%
(see Table 3).74,75,134 A recent retrospective analysis of the Mayo Clinic experience
found a similar UPPP cure rate of 24%.208 Predictors of surgical cure in this analysis
included younger age, lower preoperative BMI and AHI. Unfortunately, most patients
with initial improvement in AHI after UPPP have recurrence within 5 years of
therapy.209 Fortunately, UPPP likely confers a mortality benefit in CPAP intolerant
      patients (compared with no treatment), even when most patients do not obtain
      surgical cure.210–212 However, because UPPP is likely to eliminate snoring but will
      often leave residual OSA causing silent apnea, all patients must have postoperative
      sleep studies to rule out persistent disease.
         UPPP is generally more effective at reducing apneas than hypopneas,75,193 and is
      most effective in patients with primarily oropharyngeal obstruction (as opposed to
      hypopharyngeal abnormalities).70,193 However, using fiberoptic endoscopy to select
      patients with predominantly soft palate pharyngeal collapse during a Müller maneuver
      has shown variable improvement in surgical success (45%–85%).213–216 Although the
      efficacy to cure OSA is suboptimal, UPPP may be useful in lowering positive airway
      pressure requirements, thus improving CPAP compliance in select patients.217
      However, UPPP may promote air leak during future CPAP therapy,218,219 although
      a recent study disputes this finding.220 Approximately 70% of patients are satisfied
      after UPPP.221,222
         Early postoperative complications include wound dehiscence, hemorrhage, infec-
      tion, and transient velopharyngeal incompetence (eg, nasal regurgitation and hyper-
      nasal speech).195 Late postoperative complications include pharyngeal discomfort
      (eg, dryness, tightness), postnasal secretions, dysphagia, inability to initiate swallow-
      ing, odynophagia, nasopharyngeal stenosis, taste and speech disturbances, tongue
      numbness, and rarely permanent velopharyngeal incompetence. Up to 30% of
      patients complain of persistent although generally mild dysphagia.223–226 A systematic
      review reported a serious complication rate of 2.5% with 30 deaths (w0.2% mortality)
      and persistent side effects in 58% (31% nasal regurgitation, 13% voice changes, 5%
      taste disturbances) of patients after UPPP.127 Voice changes are generally mild.227 A
      recent study noted that health-related quality of life measurements were better in
      patients with post-UPPP side effects compared with CPAP users (independent of
      compliance) with side effects.228
      Procedures that Modify or Advance the Skeletal or Soft Tissue Structures
      Genioglossus advancement
      In the mid-1980s, Riley and colleagues229,230 first described genioglossus muscle
      advancement (GA) to improve the posterior airspace (eg, base of tongue). Their initial
      technique (a modified horizontal mandibular osteotomy) was later improved in 1986 to
      include a limited inferior parasagittal mandibular osteotomy (Fig. 5).230,231 Advancing
      the geniotubercle forward of the mandible positions the genioglossus and geniohyoid
      muscles anteriorly, thus enlarging the retrolinguinal space.232 Variations of this proce-
      dure include mortised genioplasty, circle genioplasty, and standard genioplasty.233,234
      Four case series describing 91 patients with severe OSA (mean AHI 54/h) undergoing
      GA as sole treatment report a surgical success rate of 67% (range 39%–79%) (see
      Table 3).134 GA is generally used within a multimodality approach to treat base of
      tongue obstructions.
are no reliable preoperative predictors for success with hyoid suspension following
UPPP.241 Furthermore, combining genioglossus advancement with hyoid suspension
marginally improves surgical success (w55%) (see Table 3),134 and 1 study of hyoid
suspension with radiofrequency of the tongue reported a surgical success rate of only
49%.242 Excessive daytime sleepiness generally improves after hyoid suspension,
albeit inconsistently.239,243–246
      reported several problems with DO including the technical difficulty of the procedure,
      a high risk of malocclusion, subsequent need for orthodontics because of limited
      control of the distractor vector, and poor patient satisfaction (eg, treatment required
      4 months of stabilization via intraoral arch bars that inhibited mastication and speech).
      Maxillomandibular advancement
      In 1979, Kuo and colleagues20 reported improvements in polysomnographic parame-
      ters and subjective sleepiness in 3 patients with OSA with retrognathia after mandib-
      ular osteotomy with advancement. Similar improvements in OSA parameters after
      mandibular advancement were noted by others.21,252,253 However, by the mid-
      1980s, mandibular advancement alone was largely supplanted by combined maxillary
      and mandibular advancement to preserve the maxilla-mandibular relationship and
      from the recognition that the physiologic cause for OSA is often from concomitant
      mandibular and maxillary deficiency.235,254 Mandibular osteotomy with advancement
      is currently relegated to the treatment of mandibular hypolasia in syndromic children
      with OSA.255
         Maxillomandibular advancement (MMA) involves Le Fort I maxillary and bilateral
      sagittal ramus split mandibular osteomies with advancement of the maxilla and
      mandible followed by rigid fixation (Fig. 7).256 Generally, the maxilla is advanced first,
      with the mandible advanced into occlusion. Combined MMA alleviates pharyngeal
      obstruction by expanding the skeletal framework that the tongue and other soft tissue
Maxillomandibular expansion
Surgically assisted maxillomandibular expansion (MME; limited osteotomy at Le Fort I
level and midline maxilla followed by expansion) may be an effective therapy for OSA
in adults (Fig. 8).292,293 One study (n 5 6) reported improvements in excessive daytime
sleepiness and OSA (AHI from 13/h to 5/h) at a mean follow-up of 18 months after an
average mandibular and maxillary expansion of 9.5 and 10.3 mm, respectively.293 The
investigators concluded that nonobese adolescents or young adults with mild OSA
and who require orthodontic treatment are ideal candidates for MME.
494   Holty & Guilleminault
      Fig. 8. Maxillomandibular expansion. Before (A) and after (B) surgically assisted maxillo-
      mandibular expansion with Le Fort I osteotomy and pterygomaxillary (midline) dysjunction
      followed by expansion using a orthodontic screwlike device.
separated, but horizontal osteotomy is often required in adults (whose suture line is
generally ossified) before RME.313
   Children without known OSA often report quieter nighttime breathing, reduced
snoring, and improved sleep quality after RME.303,314,315 In 1996, Palmisano and
colleagues316 reported the first use of RME to successfully treat OSA (AHI went
from 22/h to 4/h) in a 22-year-old with maxillary constriction and a class I malocclu-
sion. Subsequently, 3 studies evaluating RME in children with OSA (n 5 88; mean
expansion 6.2  2.1 mm)181,317–319 reported a mean decrease in AHI from 11/h to
0.8/h after RME (P<.001) with subjective improvements in snoring, excessive daytime
sleepiness, and behavioral problems (see Table 3).320 One study of 10 adults with
OSA who received surgically assisted RME (mean expansion 12.1 mm) reported
statistically significant improvements in AHI (19/h to 4/h; P<.05) with a 70% cure
rate (AHI <5/h).321
      Fig. 9. Riley-Powell-Stanford surgical staged protocol. (Reproduced from Riley RW, Powell
      ND, Li KK, et al. Surgery and obstructive sleep apnea: long-term clinical outcomes. Otolar-
      yngol Head Neck Surg 2000;122:416; with permission from Mosby-Year Book, Inc.)
      preoperative patient and clinical characteristics to select those patients who would
      benefit most from a staged versus primary MMA surgical approach.’’266
BARIATRIC SURGERY
      Approximately 65% of adults in the United States are overweight (BMI >25 kg/m2) and
      more than 30% are obese (BMI >30 kg/m2).328 Surgically induced weight loss was first
      performed in 1967329 and is now a preferred weight reduction modality for morbidly
      obese individuals (BMI R40 kg/m2) with more than 100,000 procedures performed
      annually in the United States.330 Bariatric surgery is generally safe, results in marked
      and sustained weight loss, and is associated with improved mortality compared with
      conventional weight-loss strategies.331–333 Procedures are classified as predomi-
      nantly malabsorptive (eg, biliopancreatic diversion, duodenal switch, jejunoileal
      bypass), predominantly restrictive (eg, vertical banded gastroplasty, adjustable
      gastric banding, sleeve gastrectomy, intragastric balloon), or combined malabsorptive
      and restrictive (eg, Roux-en-Y gastric bypass, sleeve gastrectomy with duodenal
      switch).333 Candidates for bariatric surgery should fulfill the 1991 National Institutes
      of Health guideline criteria that includes a BMI R40 kg/m2, or a BMI R35 kg/m2
      with associated comorbidity (eg, OSA).334,335
         Obesity is a leading cause of OSA with an estimated 40% prevalence in obese
      persons (BMI R30 kg/m2).336 A 10% increase in BMI results in a 32% increase in
      the AHI.336 Mild to moderate weight reduction can improve sleep apnea and daytime
      sleepiness.336,337 Two recent meta-analyses have evaluated the effectiveness of bari-
      atric surgery to treat OSA.338,339 Holty and colleagues339 found OSA to be highly prev-
      alent (79%) among bariatric candidates (of these 76% had moderate to severe
      disease), but exceedingly underdiagnosed (only 30% preoperatively). There were no
      identifiable presurgical symptoms or clinical findings predictive of polysomnographi-
      cally confirmed OSA.339 Greenberg and colleagues338 noted that after surgically
                                                              OSA Surgical Treatment      497
induced weight loss (BMI went from 55 to 38 kg/m2), the AHI improved from 55 to 16/h
(see Table 3). However, more than 50% of bariatric recipients with preoperative OSA
have residual disease despite weight loss.339 Predictors of greater AHI reduction (or
OSA cure) included younger age, but not symptom improvement (eg, excessive
daytime sleepiness) or the degree of BMI change.338,339 In addition, initial improve-
ments in AHI appeared to wane at follow-up despite maintained weight loss.339
SUMMARY
ACKNOWLEDGMENTS
  We thank Kasey K. Li, MD, DDS, for graciously providing the figures illustrating
tonsillectomy, uvulopalatal flap, and maxillomandibular expansion procedures.
REFERENCES
  1. Guilleminault C, Tilkian A, Dement WC. The sleep apnea syndromes. Annu Rev
     Med 1976;27:465–84.
  2. Young T, Finn L, Peppard PE, et al. Sleep disordered breathing and mortality:
     eighteen-year follow-up of the Wisconsin sleep cohort. Sleep 2008;31(8):
     1071–8.
  3. Duran J, Esnaola S, Rubio R, et al. Obstructive sleep apnea-hypopnea and
     related clinical features in a population-based sample of subjects aged 30 to
     70 yr. Am J Respir Crit Care Med 2001;163(3 Pt 1):685–9.
  4. Sogut A, Altin R, Uzun L, et al. Prevalence of obstructive sleep apnea syndrome
     and associated symptoms in 3–11-year-old Turkish children. Pediatr Pulmonol
     2005;39(3):251–6.
  5. Brunetti L, Rana S, Lospalluti ML, et al. Prevalence of obstructive sleep apnea
     syndrome in a cohort of 1,207 children of southern Italy. Chest 2001;120(6):
     1930–5.
  6. Redline S, Tishler PV, Schluchter M, et al. Risk factors for sleep-disordered
     breathing in children. Associations with obesity, race, and respiratory problems.
     Am J Respir Crit Care Med 1999;159(5 Pt 1):1527–32.
  7. Lumeng JC, Chervin RD, Lumeng JC, et al. Epidemiology of pediatric obstruc-
     tive sleep apnea. Proc Am Thorac Soc 2008;5(2):242–52.
  8. Young T, Peppard PE, Gottlieb DJ. Epidemiology of obstructive sleep apnea:
     a population health perspective. Am J Respir Crit Care Med 2002;165(9):
     1217–39.
498   Holty & Guilleminault
28. Suto Y, Matsuo T, Kato T, et al. Evaluation of the pharyngeal airway in patients
    with sleep apnea: value of ultrafast MR imaging. AJR Am J Roentgenol 1993;
    160(2):311–4.
29. Nishino T. Physiological and pathophysiological implications of upper airway
    reflexes in humans. Jpn J Physiol 2000;50(1):3–14.
30. Pierce RJ, Worsnop CJ. Upper airway function and dysfunction in respiration.
    Clin Exp Pharmacol Physiol 1999;26(1):1–10.
31. Brouillette RT, Thach BT. A neuromuscular mechanism maintaining extrathoracic
    airway patency. J Appl Physiol 1979;46(4):772–9.
32. Remmers JE, deGroot WJ, Sauerland EK, et al. Pathogenesis of upper airway
    occlusion during sleep. J Appl Physiol 1978;44(6):931–8.
33. Petrof BJ, Hendricks JC, Pack AI. Does upper airway muscle injury trigger
    a vicious cycle in obstructive sleep apnea? A hypothesis. Sleep 1996;19(6):
    465–71.
34. Schwab RJ, Gefter WB, Hoffman EA, et al. Dynamic upper airway imaging
    during awake respiration in normal subjects and patients with sleep disordered
    breathing. Am Rev Respir Dis 1993;148(5):1385–400.
35. Kushida CA, Efron B, Guilleminault C. A predictive morphometric model for the
    obstructive sleep apnea syndrome. Ann Intern Med 1997;127(8 Pt 1):581–7.
36. Schwab RJ, Gupta KB, Gefter WB, et al. Upper airway and soft tissue anatomy
    in normal subjects and patients with sleep-disordered breathing. Significance of
    the lateral pharyngeal walls. Am J Respir Crit Care Med 1995;152(5 Pt 1):
    1673–89.
37. Rodenstein DO, Dooms G, Thomas Y, et al. Pharyngeal shape and dimensions
    in healthy subjects, snorers, and patients with obstructive sleep apnoea. Thorax
    1990;45(10):722–7.
38. Lee SH, Choi JH, Shin C, et al. How does open-mouth breathing influence upper
    airway anatomy? Laryngoscope 2007;117(6):1102–6.
39. Chen W, Kushida CA. Nasal obstruction in sleep-disordered breathing. Otolar-
    yngol Clin North Am 2003;36(3):437–60.
40. Konno A, Togawa K, Hoshino T. The effect of nasal obstruction in infancy and
    early childhood upon ventilation. Laryngoscope 1980;90(4):699–707.
41. Olsen KD, Kern EB, Westbrook PR. Sleep and breathing disturbance secondary
    to nasal obstruction. Otolaryngol Head Neck Surg 1981;89(5):804–10.
42. Zwillich CW, Pickett C, Hanson FN, et al. Disturbed sleep and prolonged apnea
    during nasal obstruction in normal men. Am Rev Respir Dis 1981;124(2):
    158–60.
43. Rubin A, Phillipson E, Lavie P. The effects of airway anesthesia on breathing in
    sleep [abstract]. Chest 1983;84:337.
44. Patil SP, Schneider H, Marx JJ, et al. Neuromechanical control of upper airway
    patency during sleep. J Appl Physiol 2007;102(2):547–56.
45. Guilleminault C, Huang YS, Kirisoglu C, et al. Is obstructive sleep apnea
    syndrome a neurological disorder? A continuous positive airway pressure
    follow-up study. Ann Neurol 2005;58(6):880–7.
46. Kuna ST, Bedi DG, Ryckman C. Effect of nasal airway positive pressure on
    upper airway size and configuration. Am Rev Respir Dis 1988;138(4):969–75.
47. Edstrom L, Larsson H, Larsson L. Neurogenic effects on the palatopharyngeal
    muscle in patients with obstructive sleep apnoea: a muscle biopsy study. J Neu-
    rol Neurosurg Psychiatr 1992;55(10):916–20.
48. Woodson BT, Garancis JC, Toohill RJ. Histopathologic changes in snoring and
    obstructive sleep apnea syndrome. Laryngoscope 1991;101(12 Pt 1):1318–22.
500   Holty & Guilleminault
       49. McGinley BM, Schwartz AR, Schneider H, et al. Upper airway neuromuscular
           compensation during sleep is defective in obstructive sleep apnea. J Appl
           Physiol 2008;105(1):197–205.
       50. Fregosi RF, Quan SF, Morgan WL, et al. Pharyngeal critical pressure in children
           with mild sleep-disordered breathing. J Appl Physiol 2006;101(3):734–9.
       51. Marcus CL, Katz ES, Lutz J, et al. Upper airway dynamic responses in chil-
           dren with the obstructive sleep apnea syndrome. Pediatr Res 2005;57(1):
           99–107.
       52. Troell RJ, Riley RW, Powell NB, et al. Surgical management of the hypopharyng-
           eal airway in sleep disordered breathing. Otolaryngol Clin North Am 1998;31(6):
           979–1012.
       53. Powell NB, Riley RW, Guilleminault C, et al. Obstructive sleep apnea, continuous
           positive airway pressure, and surgery. Arch Otolaryngol Head Neck Surg 1988;
           99(4):362–9.
       54. Guilleminault C, Partinen M, Praud JP, et al. Morphometric facial changes and
           obstructive sleep apnea in adolescents. J Pediatr 1989;114(6):997–9.
       55. Rondeau BH. Importance of diagnosing and treating orthodontic and ortho-
           pedic problems in children. Funct Orthod 2004;21(3):4.
       56. Guilleminault C, Lee JH, Chan A, et al. Pediatric obstructive sleep apnea
           syndrome. Arch Pediatr Adolesc Med 2005;159(8):775–85.
       57. Pirila K, Tahvanainen P, Huggare J, et al. Sleeping positions and dental arch
           dimensions in children with suspected obstructive sleep apnea syndrome. Eur
           J Oral Sci 1995;103(5):285–91.
       58. Pirila-Parkkinen K, Pirttiniemi P, Nieminen P, et al. Dental arch morphology in
           children with sleep-disordered breathing. Eur J Orthod 2009;31(2):160–7.
       59. Smith RM, Gonzalez C. The relationship between nasal obstruction and cranio-
           facial growth. Pediatr Clin North Am 1989;36(6):1423–34.
       60. Bresolin D, Shapiro PA, Shapiro GG, et al. Mouth breathing in allergic children:
           its relationship to dentofacial development. Am J Orthod Dentofacial Orthop
           1983;83(4):334–40.
       61. Subtelny JD. Oral respiration: facial maldevelopment and corrective dentofacial
           orthopedics. Angle Orthod 1980;50(3):147–64.
       62. Kerr WJ, McWilliam JS, Linder-Aronson S. Mandibular form and position related
           to changed mode of breathing–a five-year longitudinal study. Angle Orthod
           1989;59(2):91–6.
       63. Vargervik K, Harvold EP. Experiments on the interaction between orofacial func-
           tion and morphology. Ear Nose Throat J 1987;66(5):201–8.
       64. Miller AJ, Vargervik K, Chierici G. Experimentally induced neuromuscular
           changes during and after nasal airway obstruction. Am J Orthod Dentofacial
           Orthop 1984;85(5):385–92.
       65. Tomer BS, Harvold EP. Primate experiments on mandibular growth direction. Am
           J Orthod Dentofacial Orthop 1982;82(2):114–9.
       66. Harvold EP, Tomer BS, Vargervik K, et al. Primate experiments on oral respira-
           tion. Am J Orthod Dentofacial Orthop 1981;79(4):359–72.
       67. Harvold EP, Vargervik K, Chierici G. Primate experiments on oral sensation and
           dental malocclusions. Am J Orthod Dentofacial Orthop 1973;63(5):494–508.
       68. Harvold EP, Chierici G, Vargervik K. Experiments on the development of dental
           malocclusions. Am J Orthod Dentofacial Orthop 1972;61(1):38–44.
       69. Arens R, McDonough JM, Costarino AT, et al. Magnetic resonance imaging of
           the upper airway structure of children with obstructive sleep apnea syndrome.
           Am J Respir Crit Care Med 2001;164(4):698–703.
                                                             OSA Surgical Treatment     501
       88. Fletcher EC, Miller J, Schaaf JW, et al. Urinary catecholamines before and after
           tracheostomy in patients with obstructive sleep apnea and hypertension. Sleep
           1987;10(1):35–44.
       89. Guilleminault C, Cummiskey J. Progressive improvement of apnea index and
           ventilatory response to CO2 after tracheostomy in obstructive sleep apnea
           syndrome. Am Rev Respir Dis 1982;126(1):14–20.
       90. Sugita Y, Wakamatsu H, Teshima Y, et al. Therapeutic effects of tracheostomy in
           two cases of hypersomnia with respiratory disturbance during sleep. Folia Psy-
           chiatr Neurol Jpn 1980;34(1):17–25.
       91. Imes NK, Orr WC, Smith RO, et al. Retrognathia and sleep apnea: a life-threat-
           ening condition masquerading as narcolepsy. JAMA 1977;237(15):1596–7.
       92. Rodman DM, Martin RJ. Tracheostomy tube failure in obstructive sleep apnea.
           West J Med 1987;147(1):41–3.
       93. Fletcher EC, Brown DL. Nocturnal oxyhemoglobin desaturation following trache-
           ostomy for obstructive sleep apnea. Am J Med 1985;79(1):35–42.
       94. Jin K, Okabe S, Chida K, et al. Tracheostomy can fatally exacerbate sleep-disor-
           dered breathing in multiple system atrophy. Neurology 2007;68(19):1618–21.
       95. Fletcher EC. Recurrence of sleep apnea syndrome following tracheostomy.
           A shift from obstructive to central apnea. Chest 1989;96(1):205–9.
       96. Weitzman ED, Kahn E, Pollak CP. Quantitative analysis of sleep and sleep apnea
           before and after tracheostomy in patients with the hypersomnia-sleep apnea
           syndrome. Sleep 1980;3(3-4):407–23.
       97. Glenn WW, Gee JB, Cole DR, et al. Combined central alveolar hypoventilation
           and upper airway obstruction. Treatment by tracheostomy and diaphragm
           pacing. Am J Med 1978;64(1):50–60.
       98. Tilkian AG, Guilleminault C, Schroeder JS, et al. Sleep-induced apnea
           syndrome. Prevalence of cardiac arrhythmias and their reversal after tracheos-
           tomy. Am J Med 1977;63(3):348–58.
       99. Hastie SJ, Prowse K, Perks WH, et al. Obstructive sleep apnoea during preg-
           nancy requiring tracheostomy. Aust N Z J Obstet Gynaecol 1989;29(3 Pt 2):
           365–7.
      100. Weitzman ED, Pollack CP, Borowiecki B. Hypersomnia-sleep apnea due to mi-
           crognathia. Reversal by tracheoplasty. Arch Neurol 1978;35(6):392–5.
      101. Motta J, Guilleminault C, Schroeder JS, et al. Tracheostomy and hemodynamic
           changes in sleep-inducing apnea. Ann Intern Med 1978;89(4):454–8.
      102. Bhimaraj A, Havaligi N, Ramachandran S. Rapid reduction of antihypertensive
           medications and insulin requirements after tracheostomy in a patient with severe
           obstructive sleep apnea syndrome. J Clin Sleep Med 2007;3(3):297–9.
      103. Simmons FB, Guilleminault C, Dement WC, et al. Surgical management of
           airway obstructions during sleep. Laryngoscope 1977;87(3):326–38.
      104. Van de Heyning PH, De Roeck J, Claes J, et al. [Tracheostomy in the sleep
           apnea syndrome]. Acta Otorhinolaryngol Belg 1984;38(5):489–502 [in French].
      105. Conway WA, Victor LD, Magilligan DJ Jr, et al. Adverse effects of tracheostomy
           for sleep apnea. JAMA 1981;246(4):347–50.
      106. Conway WA, Bower GC, Barnes ME. Hypersomnolence and intermittent upper
           airway obstruction. Occurrence caused by micrognathia. JAMA 1977;237(25):
           2740–2.
      107. He J, Kryger MH, Zorick FJ, et al. Mortality and apnea index in obstructive sleep
           apnea. Experience in 385 male patients. Chest 1988;94(1):9–14.
      108. Partinen M, Jamieson A, Guilleminault C. Long-term outcome for obstructive
           sleep apnea syndrome patients. Mortality. Chest 1988;94(6):1200–4.
                                                              OSA Surgical Treatment      503
      129. Littner M, Hirshkowitz M, Davila D, et al. Practice parameters for the use of auto-
           titrating continuous positive airway pressure devices for titrating pressures and
           treating adult patients with obstructive sleep apnea syndrome. An American
           Academy of Sleep Medicine report. Sleep 2002;25(2):143–7.
      130. Walker RP, Gopalsami C. Laser-assisted uvulopalatoplasty: postoperative
           complications. Laryngoscope 1996;106(7):834–8.
      131. Terris DJ, Clerk AA, Norbash AM, et al. Characterization of postoperative edema
           following laser-assisted uvulopalatoplasty using MRI and polysomnography:
           implications for the outpatient treatment of obstructive sleep apnea syndrome.
           Laryngoscope 1996;106(2 Pt 1):124–8.
      132. Fujita S, Woodson BT, Clark JL, et al. Laser midline glossectomy as a treatment
           for obstructive sleep apnea. Laryngoscope 1991;101(8):805–9.
      133. Woodson BT, Fujita S. Clinical experience with lingualplasty as part of the treat-
           ment of severe obstructive sleep apnea. Otolaryngol Head Neck Surg 1992;
           107(1):40–8.
      134. Kezirian EJ, Goldberg AN. Hypopharyngeal surgery in obstructive sleep apnea:
           an evidence-based medicine review. Arch Otolaryngol Head Neck Surg 2006;
           132(2):206–13.
      135. Powell NB, Riley RW, Guilleminault C. Radiofrequency tongue base reduction in
           sleep-disordered breathing: a pilot study. Otolaryngol Head Neck Surg 1999;
           120(5):656–64.
      136. Stuck BA, Maurer JT, Hein G, et al. Radiofrequency surgery of the soft
           palate in the treatment of snoring: a review of the literature. Sleep 2004;
           27(3):551–5.
      137. Li KK, Powell NB, Riley RW, et al. Temperature-controlled radiofrequency tongue
           base reduction for sleep-disordered breathing: long-term outcomes. Otolaryng-
           ol Head Neck Surg 2002;127(3):230–4.
      138. Stuck BA, Starzak K, Hein G, et al. Combined radiofrequency surgery of the
           tongue base and soft palate in obstructive sleep apnoea. Acta Otolaryngol
           2004;124(7):827–32.
      139. Fischer Y, Khan M, Mann WJ. Multilevel temperature-controlled radiofrequency
           therapy of soft palate, base of tongue, and tonsils in adults with obstructive
           sleep apnea. Laryngoscope 2003;113(10):1786–91.
      140. Friedman M, Ibrahim H, Lee G, et al. Combined uvulopalatopharyngoplasty and
           radiofrequency tongue base reduction for treatment of obstructive sleep apnea/
           hypopnea syndrome. Otolaryngol Head Neck Surg 2003;129(6):611–21.
      141. Riley RW, Powell NB, Li KK, et al. An adjunctive method of radiofrequency volu-
           metric tissue reduction of the tongue for OSAS. Otolaryngol Head Neck Surg
           2003;129(1):37–42.
      142. Woodson BT, Steward DL, Weaver EM, et al. A randomized trial of temperature-
           controlled radiofrequency, continuous positive airway pressure, and placebo for
           obstructive sleep apnea syndrome. Otolaryngol Head Neck Surg 2003;128(6):
           848–61.
      143. Stuck BA, Maurer JT, Verse T, et al. Tongue base reduction with temperature-
           controlled radiofrequency volumetric tissue reduction for treatment of obstruc-
           tive sleep apnea syndrome. Acta Otolaryngol 2002;122(5):531–6.
      144. Stuck BA, Maurer JT, Hormann K. [Tongue base reduction with radiofrequency
           energy in sleep apnea]. HNO 2001;49(7):530–7 [in German].
      145. Woodson BT, Nelson L, Mickelson S, et al. A multi-institutional study of radiofre-
           quency volumetric tissue reduction for OSAS. Otolaryngol Head Neck Surg
           2001;125(4):303–11.
                                                              OSA Surgical Treatment     505
146. Tomes CS. The bearing of the development of the jaws on irregularities. Dental
     Cosmos 1873;115:292–6.
147. Carpenter JE. Mental aberration and attending hypertrophic rhinitis with
     subacute otitus media. JAMA 1892;19:539–42.
148. Cline CL. The effects of intra-nasal obstruction on the general health. Med Surg
     Rep 1892;67:259–60.
149. Hill W. On some causes of backwardness and stupidity of children. BMJ 1889;2:
     711–2.
150. Wells WA. Some nervous and mental manifestations occurring in connection
     with nasal disease. Am J Med Sci 1898;116:677–92.
151. Koutsourelakis I, Georgoulopoulos G, Perraki E, et al. Randomised trial of nasal
     surgery for fixed nasal obstruction in obstructive sleep apnoea. Eur Respir J
     2008;31(1):110–7.
152. Pirsig W, Verse T. Long-term results in the treatment of obstructive sleep apnea.
     Eur Arch Otorhinolaryngol 2000;257(10):570–7.
153. Powell NB, Zonato AI, Weaver EM, et al. Radiofrequency treatment of turbinate
     hypertrophy in subjects using continuous positive airway pressure: a random-
     ized, double-blind, placebo-controlled clinical pilot trial. Laryngoscope 2001;
     111(10):1783–90.
154. Friedman M, Tanyeri H, Lim JW, et al. Effect of improved nasal breathing on
     obstructive sleep apnea. Otolaryngol Head Neck Surg 2000;122(1):71–4.
155. Olsen KD, Kern EB. Nasal influences on snoring and obstructive sleep apnea.
     Mayo Clin Proc 1990;65(8):1095–105.
156. Li HY, Lin Y, Chen NH, et al. Improvement in quality of life after nasal surgery
     alone for patients with obstructive sleep apnea and nasal obstruction. Arch Oto-
     laryngol Head Neck Surg 2008;134(4):429–33.
157. Li KK, Powell NB, Riley RW, et al. Radiofrequency volumetric tissue reduction for
     treatment of turbinate hypertrophy: a pilot study. Otolaryngol Head Neck Surg
     1998;119(6):569–73.
158. Kezirian EJ, Powell NB, Riley RW, et al. Incidence of complications in radiofre-
     quency treatment of the upper airway. Laryngoscope 2005;115(7):1298–304.
159. Li KK, Powell NB, Riley RW, et al. Radiofrequency volumetric reduction of the
     palate: an extended follow-up study. Otolaryngol Head Neck Surg 2000;
     122(3):410–4.
160. Coleman SC, Smith TL. Midline radiofrequency tissue reduction of the palate for
     bothersome snoring and sleep-disordered breathing: a clinical trial. Otolaryngol
     Head Neck Surg 2000;122(3):387–94.
161. Powell NB, Riley RW, Troell RJ, et al. Radiofrequency volumetric tissue reduction
     of the palate in subjects with sleep-disordered breathing. Chest 1998;113(5):
     1163–74.
162. Stuck BA, Sauter A, Hormann K, et al. Radiofrequency surgery of the soft palate
     in the treatment of snoring. A placebo-controlled trial. Sleep 2005;28(7):847–50.
163. Hofmann T, Schwantzer G, Reckenzaun E, et al. Radiofrequency tissue volume
     reduction of the soft palate and UPPP in the treatment of snoring. Eur Arch Oto-
     rhinolaryngol 2006;263(2):164–70.
164. Blumen MB, Dahan S, Fleury B, et al. Radiofrequency ablation for the treatment
     of mild to moderate obstructive sleep apnea. Laryngoscope 2002;112(11):
     2086–92.
165. Brown DJ, Kerr P, Kryger M. Radiofrequency tissue reduction of the palate in
     patients with moderate sleep-disordered breathing. J Otolaryngol 2001;30(4):
     193–8.
506   Holty & Guilleminault
      166. Back LJ, Liukko T, Rantanen I, et al. Radiofrequency surgery of the soft palate in
           the treatment of mild obstructive sleep apnea is not effective as a single-stage
           procedure: a randomized single-blinded placebo-controlled trial. Laryngoscope
           2009;119(8):1621–7.
      167. Bluestone CD. Current indications for tonsillectomy and adenoidectomy. Ann
           Otol Rhinol Laryngol Suppl 1992;155:58–64.
      168. Rosenfeld RM, Green RP. Tonsillectomy and adenoidectomy: changing trends.
           Ann Otol Rhinol Laryngol 1990;99(3 Pt 1):187–91.
      169. Waters KA, Cheng AT. Adenotonsillectomy in the context of obstructive sleep
           apnoea. Paediatr Respir Rev 2009;10(1):25–31.
      170. Krishna P, LaPage MJ, Hughes LF, et al. Current practice patterns in tonsillec-
           tomy and perioperative care. Int J Pediatr Otorhinolaryngol 2004;68(6):779–84.
      171. Celenk F, Bayazit YA, Yilmaz M, et al. Tonsillar regrowth following partial tonsil-
           lectomy with radiofrequency. Int J Pediatr Otorhinolaryngol 2008;72(1):19–22.
      172. Vlastos IM, Parpounas K, Economides J, et al. Tonsillectomy versus tonsillotomy
           performed with scissors in children with tonsillar hypertrophy. Int J Pediatr Oto-
           rhinolaryngol 2008;72(6):857–63.
      173. Koltai PJ, Solares CA, Mascha EJ, et al. Intracapsular partial tonsillectomy for
           tonsillar hypertrophy in children. Laryngoscope 2002;112(8 Pt 2 Suppl 100):
           17–9.
      174. Densert O, Desai H, Eliasson A, et al. Tonsillotomy in children with tonsillar
           hypertrophy. Acta Otolaryngol 2001;121(7):854–8.
      175. Hultcrantz E, Linder A, Markstrom A. Tonsillectomy or tonsillotomy?–A random-
           ized study comparing postoperative pain and long-term effects. Int J Pediatr
           Otorhinolaryngol 1999;51(3):171–6.
      176. Eviatar E, Kessler A, Shlamkovitch N, et al. Tonsillectomy vs. partial tonsillec-
           tomy for OSAS in children–10 years post-surgery follow-up. Int J Pediatr Otorhi-
           nolaryngol 2009;73(5):637–40.
      177. Brietzke SE, Gallagher D. The effectiveness of tonsillectomy and adenoidec-
           tomy in the treatment of pediatric obstructive sleep apnea/hypopnea
           syndrome: a meta-analysis. Otolaryngol Head Neck Surg 2006;134(6):
           979–84.
      178. Friedman M, Wilson M, Lin HC, et al. Updated systematic review of tonsillectomy
           and adenoidectomy for treatment of pediatric obstructive sleep apnea/hypo-
           pnea syndrome. Otolaryngol Head Neck Surg 2009;140(6):800–8.
      179. Mitchell RB, Kelly J. Outcome of adenotonsillectomy for obstructive sleep apnea
           in obese and normal-weight children. Otolaryngol Head Neck Surg 2007;137(1):
           43–8.
      180. O’Brien LM, Sitha S, Baur LA, et al. Obesity increases the risk for persisting
           obstructive sleep apnea after treatment in children. Int J Pediatr Otorhinolaryngol
           2006;70(9):1555–60.
      181. Guilleminault C, Quo S, Huynh NT, et al. Orthodontic expansion treatment and
           adenotonsillectomy in the treatment of obstructive sleep apnea in prepubertal
           children. Sleep 2008;31(7):953–7.
      182. Ye J, Liu H, Zhang G, et al. Postoperative respiratory complications of adenoton-
           sillectomy for obstructive sleep apnea syndrome in older children: prevalence,
           risk factors, and impact on clinical outcome. J Otolaryngol Head Neck Surg
           2009;38(1):49–58.
      183. Lima Junior JM, Silva VC, Freitas MR. Long term results in the life quality of chil-
           dren with obstructive sleep disorders submitted to adenoidectomy/adenotonsil-
           lectomy. Braz J Otorhinolaryngol 2008;74(5):718–24.
                                                                 OSA Surgical Treatment      507
184. Goldstein NA, Fatima M, Campbell TF, et al. Child behavior and quality of life
     before and after tonsillectomy and adenoidectomy. Arch Otolaryngol Head
     Neck Surg 2002;128(7):770–5.
185. Mitchell RB, Kelly J. Behavioral changes in children with mild sleep-disordered
     breathing or obstructive sleep apnea after adenotonsillectomy. Laryngoscope
     2007;117(9):1685–8.
186. Mitchell RB. Adenotonsillectomy for obstructive sleep apnea in children:
     outcome evaluated by pre- and postoperative polysomnography. Laryngoscope
     2007;117(10):1844–54.
187. Rosen GM, Muckle RP, Mahowald MW, et al. Postoperative respiratory compro-
     mise in children with obstructive sleep apnea syndrome: can it be anticipated?
     Pediatrics 1994;93(5):784–8.
188. Richter GT, Bower CM. Cervical complications following routine tonsillectomy
     and adenoidectomy. Curr Opin Otolaryngol Head Neck Surg 2006;14(6):
     375–80.
189. McColley SA, April MM, Carroll JL, et al. Respiratory compromise after adeno-
     tonsillectomy in children with obstructive sleep apnea. Arch Otolaryngol Head
     Neck Surg 1992;118(9):940–3.
190. Schroeder JW Jr, Anstead AS, Wong H. Complications in children who electively
     remain intubated after adenotonsillectomy for severe obstructive sleep apnea.
     Int J Pediatr Otorhinolaryngol 2009;73(8):1095–9.
191. Brigger MT, Brietzke SE. Outpatient tonsillectomy in children: a systematic
     review. Otolaryngol Head Neck Surg 2006;135(1):1–7.
192. Conway W, Fujita S, Zorick F, et al. Uvulopalatopharyngoplasty. One-year follow-
     up. Chest 1985;88(3):385–7.
193. Fujita S, Conway WA, Zorick FJ, et al. Evaluation of the effectiveness of uvulopa-
     latopharyngoplasty. Laryngoscope 1985;95(1):70–4.
194. Simmons FB, Guilleminault C, Silvestri R. Snoring, and some obstructive sleep
     apnea, can be cured by oropharyngeal surgery. Arch Otolaryngol Head Neck
     Surg 1983;109(8):503–7.
195. Fairbanks DN. Uvulopalatopharyngoplasty complications and avoidance strate-
     gies. Otolaryngol Head Neck Surg 1990;102(3):239–45.
196. Dickson RI, Blokmanis A. Treatment of obstructive sleep apnea by uvulopalato-
     pharyngoplasty. Laryngoscope 1987;97(9):1054–9.
197. Friedman M, Landsberg R, Tanyeri H. Submucosal uvulopalatopharnyoplasty.
     Op Tec Otolaryngol Head Neck Surg 2000;11:26–9.
198. Powell N, Riley R, Guilleminault C, et al. A reversible uvulopalatal flap for snoring
     and sleep apnea syndrome. Sleep 1996;19(7):593–9.
199. Li HY, Li KK, Chen NH, et al. Three-dimensional computed tomography and pol-
     ysomnography findings after extended uvulopalatal flap surgery for obstructive
     sleep apnea. Am J Otolaryngol 2005;26(1):7–11.
200. Li HY, Chen NH, Shu YH, et al. Changes in quality of life and respiratory distur-
     bance after extended uvulopalatal flap surgery in patients with obstructive sleep
     apnea. Arch Otolaryngol Head Neck Surg 2004;130(2):195–200.
201. Li HY, Li KK, Chen NH, et al. Modified uvulopalatopharyngoplasty: the extended
     uvulopalatal flap. Am J Otolaryngol 2003;24(5):311–6.
202. Woodson BT, Toohill RJ. Transpalatal advancement pharyngoplasty for obstruc-
     tive sleep apnea. Laryngoscope 1993;103(3):269–76.
203. Shine NP, Lewis RH. Transpalatal advancement pharyngoplasty for obstructive
     sleep apnea syndrome: results and analysis of failures. Arch Otolaryngol Head
     Neck Surg 2009;135(5):434–8.
508   Holty & Guilleminault
      204. Sundaram S, Lim J, Lasserson TJ. Surgery for obstructive sleep apnoea. Co-
           chrane Database Syst Rev 2005;(4):CD001004.
      205. Conaway JR, Scherr SC, Conaway JR, et al. Multidisciplinary management of the
           airway in a trauma-induced brain injury patient. Sleep Breath 2004;8(3):165–70.
      206. Megwalu UC, Piccirillo JF. Methodological and statistical problems in uvulopala-
           topharyngoplasty research: a follow-up study. Arch Otolaryngol Head Neck
           Surg 2008;134(8):805–9.
      207. Lojander J, Maasilta P, Partinen M, et al. Nasal-CPAP, surgery, and conservative
           management for treatment of obstructive sleep apnea syndrome. A randomized
           study. Chest 1996;110(1):114–9.
      208. Khan A, Ramar K, Maddirala S, et al. Uvulopalatopharyngoplasty in the
           management of obstructive sleep apnea: the Mayo Clinic experience. Mayo
           Clin Proc 2009;84(9):795–800.
      209. Sher AE. Upper airway surgery for obstructive sleep apnea. Sleep Med Rev
           2002;6(3):195–212.
      210. Weaver EM, Maynard C, Yueh B. Survival of veterans with sleep apnea: contin-
           uous positive airway pressure versus surgery. Otolaryngol Head Neck Surg
           2004;130(6):659–65.
      211. Marti S, Sampol G, Munoz X, et al. Mortality in severe sleep apnoea/hypopnoea
           syndrome patients: impact of treatment. Eur Respir J 2002;20(6):1511–8.
      212. Keenan SP, Burt H, Ryan CF, et al. Long-term survival of patients with obstruc-
           tive sleep apnea treated by uvulopalatopharyngoplasty or nasal CPAP. Chest
           1994;105(1):155–9.
      213. Boot H, Poublon RM, Van Wegen R, et al. Uvulopalatopharyngoplasty for the
           obstructive sleep apnoea syndrome: value of polysomnography, Mueller
           manoeuvre and cephalometry in predicting surgical outcome. Clin Otolaryngol
           1997;22(6):504–10.
      214. Katsantonis GP, Maas CS, Walsh JK. The predictive efficacy of the Muller
           maneuver in uvulopalatopharyngoplasty. Laryngoscope 1989;99(7 Pt 1):
           677–80.
      215. Gereau SA, Sher AE, Glovinsky P, et al. Results of uvulopalatopharyngoplasty
           (UPPP) in patients selected by Mueller Maneuver [abstract]. Sleep Res 1986;
           15(124).
      216. Sher AE, Thorpy MJ, Shprintzen RJ, et al. Predictive value of Muller maneuver in
           selection of patients for uvulopalatopharyngoplasty. Laryngoscope 1985;95(12):
           1483–7.
      217. Chandrashekariah R, Shaman Z, Auckley D. Impact of upper airway surgery on
           CPAP compliance in difficult-to-manage obstructive sleep apnea. Arch Otolar-
           yngol Head Neck Surg 2008;134(9):926–30.
      218. Han F, Song W, Li J, et al. Influence of UPPP surgery on tolerance to subsequent
           continuous positive airway pressure in patients with OSAHS. Sleep Breath 2006;
           10(1):37–42.
      219. Mortimore IL, Bradley PA, Murray JA, et al. Uvulopalatopharyngoplasty may
           compromise nasal CPAP therapy in sleep apnea syndrome. Am J Respir Crit
           Care Med 1996;154(6 Pt 1):1759–62.
      220. Friedman M, Soans R, Joseph N, et al. The effect of multilevel upper airway
           surgery on continuous positive airway pressure therapy in obstructive sleep
           apnea/hypopnea syndrome. Laryngoscope 2009;119(1):193–6.
      221. Miljeteig H, Mateika S, Haight JS, et al. Subjective and objective assessment of
           uvulopalatopharyngoplasty for treatment of snoring and obstructive sleep
           apnea. Am J Respir Crit Care Med 1994;150(5 Pt 1):1286–90.
                                                              OSA Surgical Treatment     509
      240. Baisch A, Maurer JT, Hormann K. The effect of hyoid suspension in a multilevel
           surgery concept for obstructive sleep apnea. Otolaryngol Head Neck Surg
           2006;134(5):856–61.
      241. Stuck BA, Neff W, Hormann K, et al. Anatomic changes after hyoid suspension
           for obstructive sleep apnea: an MRI study. Otolaryngol Head Neck Surg 2005;
           133(3):397–402.
      242. Verse T, Baisch A, Hormann K. [Multi-level surgery for obstructive sleep apnea.
           Preliminary objective results]. Laryngorhinootologie 2004;83(8):516–22 [in
           German].
      243. Vilaseca I, Morello A, Montserrat JM, et al. Usefulness of uvulopalatopharyngo-
           plasty with genioglossus and hyoid advancement in the treatment of obstructive
           sleep apnea. Arch Otolaryngol Head Neck Surg 2002;128(4):435–40.
      244. Neruntarat C. Genioglossus advancement and hyoid myotomy under local
           anesthesia. Otolaryngol Head Neck Surg 2003;129(1):85–91.
      245. Neruntarat C. Genioglossus advancement and hyoid myotomy: short-term and
           long-term results. J Laryngol Otol 2003;117(6):482–6.
      246. den Herder C, van Tinteren H, de Vries N, et al. Hyoidthyroidpexia: a surgical
           treatment for sleep apnea syndrome. Laryngoscope 2005;115(4):740–5.
      247. Li KK, Powell NB, Riley RW, et al. Distraction osteogenesis in adult obstructive
           sleep apnea surgery: a preliminary report. J Oral Maxillofac Surg 2002;60(1):
           6–10.
      248. Morovic CG, Monasterio L. Distraction osteogenesis for obstructive apneas in
           patients with congenital craniofacial malformations. Plast Reconstr Surg 2000;
           105(7):2324–30.
      249. Williams JK, Maull D, Grayson BH, et al. Early decannulation with bilateral
           mandibular distraction for tracheostomy-dependent patients. Plast Reconstr
           Surg 1999;103(1):48–57.
      250. Cohen SR, Ross DA, Burstein FD, et al. Skeletal expansion combined with soft-
           tissue reduction in the treatment of obstructive sleep apnea in children: physio-
           logic results. Otolaryngol Head Neck Surg 1998;119(5):476–85.
      251. McCarthy JG, Schreiber J, Karp N, et al. Lengthening the human mandible by
           gradual distraction. Plast Reconstr Surg 1992;89(1):1–8.
      252. Spire JP, Kuo PC, Campbell N. Maxillo-facial surgical approach: an introduction
           and review of mandibular advancement. Bull Eur Physiopathol Respir 1983;
           19(6):604–6.
      253. Powell N, Guilleminault C, Riley R, et al. Mandibular advancement and obstruc-
           tive sleep apnea syndrome. Bull Eur Physiopathol Respir 1983;19(6):607–10.
      254. Jamieson A, Guilleminault C, Partinen M, et al. Obstructive sleep apneic
           patients have craniomandibular abnormalities. Sleep 1986;9(4):469–77.
      255. Bell RB, Turvey TA. Skeletal advancement for the treatment of obstructive sleep
           apnea in children. Cleft Palate Craniofac J 2001;38(2):147–54.
      256. Cao M, Li K, Guilleminault C. Maxillomandibular advancement surgery for
           obstructive sleep apnea treatment. Minerva Pneumol 2008;47:203–12.
      257. Li KK, Guilleminault C, Riley RW, et al. Obstructive sleep apnea and maxilloman-
           dibular advancement: an assessment of airway changes using radiographic
           and nasopharyngoscopic examinations. J Oral Maxillofac Surg 2002;60(5):
           526–30 [discussion: 531].
      258. Wickwire NA, White RP Jr, Proffit WR. The effect of mandibular osteotomy on
           tongue position. J Oral Maxillofac Surg 1972;30(3):184–90.
      259. Schendel SA, Oeschlaeger M, Wolford LM, et al. Velopharyngeal anatomy and
           maxillary advancement. J Maxillofac Surg 1979;7(2):116–24.
                                                              OSA Surgical Treatment     511
      277. Conradt R, Hochban W, Heitmann J, et al. Sleep fragmentation and daytime vigi-
           lance in patients with OSA treated by surgical maxillomandibular advancement
           compared to CPAP therapy. J Sleep Res 1998;7(3):217–23.
      278. Conradt R, Hochban W, Brandenburg U, et al. [nCPAP therapy and maxil-
           lary and mandibular osteotomy compared: attention during the day in
           obstructive sleep apnea]. Wien Med Wochenschr 1996;146(13–14):372–4
           [in German].
      279. Hochban W, Brandenburg U, Peter JH. Surgical treatment of obstructive sleep
           apnea by maxillomandibular advancement. Sleep 1994;17(7):624–9.
      280. Hendler BH, Costello BJ, Silverstein K, et al. A protocol for uvulopalatopharyng-
           oplasty, mortised genioplasty, and maxillomandibular advancement in patients
           with obstructive sleep apnea: an analysis of 40 cases. J Oral Maxillofac Surg
           2001;59(8):892–7.
      281. Nimkarn Y, Miles PG, Waite PD. Maxillomandibular advancement surgery in
           obstructive sleep apnea syndrome patients: long-term surgical stability. J Oral
           Maxillofac Surg 1995;53(12):1414–8.
      282. Riley RW, Powell NB, Guilleminault C. Maxillofacial surgery and nasal CPAP. A
           comparison of treatment for obstructive sleep apnea syndrome. Chest 1990;
           98(6):1421–5.
      283. Miles PG, Nimkarn Y. Maxillomandibular advancement surgery in patients with
           obstructive sleep apnea: mandibular morphology and stability. Int J Adult Ortho-
           don Orthognath Surg 1995;10(3):193–200.
      284. Louis PJ, Waite PD, Austin RB. Long-term skeletal stability after rigid fixation of
           Le Fort I osteotomies with advancements. Int J Oral Maxillofac Surg 1993;22(2):
           82–6.
      285. Waite PD, Wooten V. Maxillomandibular advancement: a surgical treatment of
           obstructive sleep apnea. In: Bell WH, editor, Modern practice in orthognathic
           and reconstructive surgery, vol. 3. Philadelphia: WB Saunders; 1992. p.
           2042–59.
      286. Lu XF, Zhu M, He JD, et al. [Uvulopalatopharyngoplasty and maxillomandibular
           advancement for obese patients with obstructive sleep apnea hypopnea
           syndrome: a preliminary report]. Zhonghua Kou QiangYi Xue Za Zhi 2007;
           42(4):199–202 [in Chinese].
      287. Li KK, Riley RW, Powell NB, et al. Obstructive sleep apnea surgery: patient
           perspective and polysomnographic results. Otolaryngol Head Neck Surg
           2000;123(5):572–5.
      288. Bettega G, Pepin JL, Veale D, et al. Obstructive sleep apnea syndrome. Fifty-
           one consecutive patients treated by maxillofacial surgery. Am J Respir Crit
           Care Med 2000;162(2 Pt 1):641–9.
      289. Li KK, Riley RW, Powell NB, et al. Patient’s perception of the facial appearance
           after maxillomandibular advancement for obstructive sleep apnea syndrome.
           J Oral Maxillofac Surg 2001;59(4):377–80 [discussion: 380–1].
      290. Li KK, Riley RW, Powell NB, et al. Maxillomandibular advancement for persistent
           obstructive sleep apnea after phase I surgery in patients without maxillomandib-
           ular deficiency. Laryngoscope 2000;110(10 Pt 1):1684–8.
      291. Matsuo A, Nakai T, Toyoda J, et al. Good esthetic results after modified maxillo-
           mandibular advancement for obstructive sleep apnea syndrome. Sleep Biol
           Rhythms 2009;7:3–10.
      292. Conley RS, Legan HL. Correction of severe obstructive sleep apnea with bimax-
           illary transverse distraction osteogenesis and maxillomandibular advancement.
           Am J Orthod Dentofacial Orthop 2006;129(2):283–92.
                                                              OSA Surgical Treatment      513
      315. Timms DJ. The reduction of nasal airway resistance by rapid maxillary
           expansion and its effect on respiratory disease. J Laryngol Otol 1984;
           98(4):357–62.
      316. Palmisano RG, Wilcox I, Sullivan CE, et al. Treatment of snoring and obstructive
           sleep apnoea by rapid maxillary expansion. Aust N Z J Med 1996;26(3):428–9.
      317. Villa MP, Malagola C, Pagani J, et al. Rapid maxillary expansion in children with
           obstructive sleep apnea syndrome: 12-month follow-up. Sleep Med 2007;8(2):
           128–34.
      318. Pirelli P, Saponara M, Attanasio G, et al. Obstructive sleep apnoea syndrome
           (OSAS) and rhino-tubaric disfunction in children: therapeutic effects of RME
           therapy. Prog Orthod 2005;6(1):48–61.
      319. Pirelli P, Saponara M, Guilleminault C. Rapid maxillary expansion in children with
           obstructive sleep apnea syndrome. Sleep 2004;27(4):761–6.
      320. Holty JEC, Guilleminault C. Maxillo-mandibular expansion and advancement for
           the treatment of sleep-disordered breathing in children and adults. Semin
           Orthod, in press.
      321. Cistulli PA, Palmisano RG, Poole MD. Treatment of obstructive sleep apnea
           syndrome by rapid maxillary expansion. Sleep 1998;21(8):831–5.
      322. Friedman M, Lin HC, Gurpinar B, et al. Minimally invasive single-stage multilevel
           treatment for obstructive sleep apnea/hypopnea syndrome. Laryngoscope
           2007;117(10):1859–63.
      323. Verse T, Baisch A, Maurer JT, et al. Multilevel surgery for obstructive sleep
           apnea: short-term results. Otolaryngol Head Neck Surg 2006;134(4):571–7.
      324. Li HY, Wang PC, Hsu CY, et al. Same-stage palatopharyngeal and hypophar-
           yngeal surgery for severe obstructive sleep apnea. Acta Otolaryngol 2004;
           124(7):820–6.
      325. Riley RW, Powell NB, Guilleminault C. Obstructive sleep apnea syndrome:
           a review of 306 consecutively treated surgical patients. Otolaryngol Head
           Neck Surg 1993;108(2):117–25.
      326. Li KK, Powell NB, Riley RW, et al. Overview of phase I surgery for obstructive
           sleep apnea syndrome. Ear Nose Throat J 1999;78(11):836–7.
      327. Li KK, Riley RW, Powell NB, et al. Overview of phase II surgery for obstructive
           sleep apnea syndrome. Ear Nose Throat J 1999;78(11):851.
      328. Flegal KM, Carrol MD, Ogden CL, et al. Prevalence and trends in obesity among
           US adults, 1999-2000. JAMA 2002;288:1723–7.
      329. Brolin RE. Gastric bypass. Surg Clin North Am 1967;81(5):1077–95.
      330. Santry HP, Gillen DL, Lauderdale DS. Trends in bariatric surgical procedures.
           JAMA 2005;294(15):1909–17.
      331. Flum DR, Belle SH, King WC, et al. Perioperative safety in the longitudinal
           assessment of bariatric surgery. N Engl J Med 2009;361(5):445–54.
      332. Sjostrom L, Narbro K, Sjostrom CD, et al. Effects of bariatric surgery on mortality
           in Swedish obese subjects. N Engl J Med 2007;357(8):741–52.
      333. Buchwald H, Avidor Y, Braunwald E, et al. Bariatric surgery: a systematic review
           and meta-analysis. JAMA 2004;292(14):1724–37.
      334. Gastrointestinal surgery for severe obesity: National Institutes of Health
           Consensus Development Conference Statement. Am J Clin Nutr 1992;55:
           615S–9S.
      335. Anonymous. Gastrointestinal surgery for severe obesity. NIH Consensus State-
           ment Online 1991;9(1):1–20.
      336. Peppard PE, Young T, Palta M, et al. Longitudinal study of moderate weight
           change and sleep-disordered breathing. JAMA 2000;284(23):3015–21.
                                                            OSA Surgical Treatment     515
337. Smith PL, Gold AR, Meyers DA, et al. Weight loss in mildly to moderately obese
     patients with obstructive sleep apnea. Ann Intern Med 1985;103(6 (Pt 1)):850–5.
338. Greenburg DL, Lettieri CJ, Eliasson AH. Effects of surgical weight loss on
     measures of obstructive sleep apnea: a meta-analysis. Am J Med 2009;
     122(6):535–42.
339. Holty JE, Levesque BG, Schneider-Chafen J, et al. Obstructive sleep apnea is
     prevalent and persistent among patients undergoing bariatric surgery: a system-
     atic review [abstract presentation]. Dig Dis Sci 2010.