Inpatient Management of Acute Asthma Exacerbation
Inpatient Management of Acute Asthma Exacerbation
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1.0 Introduction
Asthma is a chronic inflammatory disorder characterized by variable and recurring symptoms of airflow obstruction that
manifest secondary to bronchoconstriction, airway hyper-responsiveness, and airway edema, which tend to occur in
response to a variety of stimuli. Asthma exacerbations are a leading cause of hospitalization in children.
The hallmark of asthma exacerbation management involves optimizing bronchodilation and decreasing airway
inflammation. While these elements are generally well-practiced, there continues to be significant variability in practice
which can hinder optimal management and increase the duration of acute symptoms. Furthermore, inconsistencies in
asthma teaching and associated preventative recommendations that are given to families have been reported, which lead
to confusion, patient and caregiver dissatisfaction, and poor asthma control. It is therefore essential that consistent and
thorough asthma education be provided and prevention strategies initiated while in hospital with appropriate post
discharge follow up in the community.
The recommendations presented in this guideline and the associated pathway have been created using an
interdisciplinary panel of experts and key users following extensive review of the literature, existing guidelines, and
benchmarking with other reputable institutions.
Objectives
         Streamline the medical management of inpatients admitted to Paediatric Medicine with an acute asthma
          exacerbation;
         Improve appropriate diagnostic testing;
         Provide optimal pharmacotherapy to prevent or minimize adverse effects of therapy;
         Achieve appropriate length of stay by establishing a standard salbutamol-weaning protocol;
         Standardize and promote effective asthma teaching using an asthma checklist;
         Ensure appropriate ongoing asthma management through initiating and adhering to an asthma action plan;
         Prevent recurrent asthma exacerbations and minimize the need for Emergency Department visits and/or
          hospitalizations secondary to poor asthma control by ensuring appropriate follow-up;
         Ensure appropriate targets are met for discharge to minimize readmission rates (i.e., spirometry);
         Ensure access to medications to prevent readmissions; and
         Enhance appropriate utilization of community resources and ensure appropriate follow up.
© 2012 The Hospital for Sick Children ('SickKids'). All Rights Reserved. This document may be reproduced or used strictly for non-commercial clinical
purposes. However, by permitting such use, SickKids does not grant any broader license or waive any of its exclusive rights under copyright or
otherwise at law; in particular, this document may not be used for publication without appropriate acknowledgement to SickKids. This Clinical Practice
Guideline has been developed to guide the practice of clinicians at the Hospital for Sick Children. Use of this guideline in any setting must be subject to
the clinical judgment of those responsible for providing care. SickKids does not accept responsibility for the application of this guideline outside
SickKids.
                                                                                                                                            Page 1 of 10
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Target Users
Target Population:
    Inclusion: This management pathway is intended primarily for use in children age > 12 months of age being
          admitted to hospital with an acute asthma exacerbation.
         Exclusion: This pathway is not intended for use in children with:
              Congenital or acquired cardiovascular disease
              Cystic fibrosis
              Chronic lung disease or bronchopulmonary dysplasia
              Immunodeficiency syndromes
              Sickle Cell Disease
              Multiple co-morbidities
              Severe symptoms requiring management in an ICU setting
              A condition requiring treatment with a beta-blocker
Diagnosis:
         Asthma can be diagnosed in children > 1 year old
         In school-aged children > 6 years old and adolescents, prior diagnosis of asthma using pulmonary function tests
          is ideal
         In children 1 to 5 years of age, the diagnosis of asthma should be considered in children with ≥ 2 wheezing
          episodes or frequent (≥ 8 days/month) wheeze symptoms
               o Diagnosis requires documentation of or convincing parent report of signs or symptoms of airflow
                   obstruction and improvement or reversibility of obstruction with asthma therapy and no suspicion of an
                   alternative diagnosis
Assessment:
    Thorough clinical history should include:
        o Time of onset of exacerbation
© 2012 The Hospital for Sick Children ('SickKids'). All Rights Reserved. This document may be reproduced or used strictly for non-commercial clinical
purposes. However, by permitting such use, SickKids does not grant any broader license or waive any of its exclusive rights under copyright or
otherwise at law; in particular, this document may not be used for publication without appropriate acknowledgement to SickKids. This Clinical Practice
Guideline has been developed to guide the practice of clinicians at the Hospital for Sick Children. Use of this guideline in any setting must be subject to
the clinical judgment of those responsible for providing care. SickKids does not accept responsibility for the application of this guideline outside
SickKids.
                                                                                                                                            Page 2 of 10
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               o    All current medications and time of last dose and use of aerochamber
               o    Estimated number of asthma-related visits and severity (office, ED, hospitalizations, and ICU
                    admissions/need for intubation)
               o    Severity of symptoms compared to previous exacerbations
               o    Response to treatments prior to admission
               o    Last course of systemic steroids
               o    Ability to access medications (drug plan)
               o    Assessment of persistent symptoms: use of salbutamol, nighttime symptoms, and exercise intolerance
               o    Presence of complicating illnesses (pulmonary, cardiac)
               o    Diseases aggravated by steroid therapy (diabetes, hypertension, ulcers, psychosis)
               o    Potential triggers for exacerbation
               o    History of food allergy or allergy
               o    Cigarette smoke exposure - maternal, paternal, caregiver
               o    Social and environment history-crowding in home, exposure to irritants
                                                                                                                                            Page 3 of 10
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Alternative treatments:
     The following treatments are NOT routinely recommended for asthma management:
            Methylxanthines
            Antibiotics except as needed for comorbid conditions
            IV hydration unless unable to safely maintain oral hydration
            Chest physical therapy
            Mucolytics
            Sedation
                                                                 Management
Basic                     The basic inpatient management of an acute asthma exacerbation involves bronchodilators,
Management                decreasing airway inflammation, supportive care to ensure that the patient is clinically stable, well
                          oxygenated, and well hydrated, and the initiation of interventions (asthma prevention therapy and
                          asthma teaching) to reduce the risk of future exacerbations.
Assessment of                      There are no asthma severity scoring tools that have been validated for use in the inpatient
Asthma Severity                     setting.
                                   Using the best available evidence, the consensus of the Guideline Committee was to use
                                    the Respiratory Assessment Criteria adapted from the Children's Hospital of Philadelphia to
                                    assess Asthma Severity and direct pathway interventions accordingly.
Oxygen Therapy                     There is a lack of evidence to specify an oxygen saturation (by pulse oximetry) threshold
                                    below which supplemental oxygen is indicated. The consensus of the guideline committee
                                    using best available evidence recommends starting supplemental oxygen when the
                                    saturation is consistently < 88% while breathing room air.
                                   Intermittent oxygen saturation monitoring should be used for any child not requiring
                                    continuous oxygen therapy.
Bronchodilator                     Salbutamol is the bronchodilator of choice and frequency of administration should reflect the
therapy                             respiratory assessment criteria.
                                   Administration of salbutamol is recommended using a metered dose inhaler (MDI) with an
                                    appropriate-sized spacer and mask (if under 4 years old).
                                     Administration via an MDI and spacer is better tolerated, associated with decreased
                                        adverse effects, decreased length of stay, and has been found to be more effective at
                                        medication administration than a nebulizer
                                     Use of a nebulizer may be considered in managing patients with severe respiratory
                                        distress and impending respiratory failure who may require continuous or passive
                                        medication administration with concurrent high flow oxygen administration
© 2012 The Hospital for Sick Children ('SickKids'). All Rights Reserved. This document may be reproduced or used strictly for non-commercial clinical
purposes. However, by permitting such use, SickKids does not grant any broader license or waive any of its exclusive rights under copyright or
otherwise at law; in particular, this document may not be used for publication without appropriate acknowledgement to SickKids. This Clinical Practice
Guideline has been developed to guide the practice of clinicians at the Hospital for Sick Children. Use of this guideline in any setting must be subject to
the clinical judgment of those responsible for providing care. SickKids does not accept responsibility for the application of this guideline outside
SickKids.
                                                                                                                                            Page 4 of 10
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Steroid Therapy                    Systemic corticosteroids are essential in the treatment of the acute asthma exacerbation
                                   Dexamethasone, Prednisone, Prednisolone, and IV Methylprednisolone are frequently used
                                    medications in the management of patients with an acute asthma exacerbation
                                         There is a lack of evidence to suggest that the use of any of these medications is
                                            superior to the others. The consensus of the Guideline Committee is to recommend
                                            a 2-day course of dexamethasone for the treatment of the routine acute asthma
                                            exacerbation. Considerations included were palatability, duration of treatment, half-
                                            life, side effects, and cost to families.
                                   Inhaled corticosteroids (ICS) are not as effective as PO or IV steroids for the acute
                                    management of exacerbations and should not be used for this purpose.
Ipratropium                        There is no evidence to support the inpatient use of ipratropium to manage acute asthma
Bromide                             exacerbations.
IV Magnesium                       Consider the use of IV magnesium sulphate in cases of severe asthma that do not appear to
Sulphate                            be improving despite aggressive management with bronchodilator and corticosteroid
                                    therapy
Asthma                             ICS are critical in the long-term control of asthma symptoms and should be started or
Prevention                          restarted at discharge following the course of systemic corticosteroids
Strategy                              In line with the Canadian Paediatric Society’s recommendations, the Guideline
                                         Committee recommends a 12-week trial of a moderate daily dose of ICS (fluticasone e-
                                         formulary) for patients presenting with first asthma exacerbation and not previously on
                                         maintenance ICS therapy. For patients on prior ICS therapy, consider escalation in
                                         maintenance therapy as per Canadian asthma guidelines
                                   Asthma education is a key part of prevention and is a fundamental element in inpatient
                                    management. The Guideline Committee recommends that the Asthma Teaching Checklist
                                    and Action Plan are reviewed thoroughly prior to discharge with ongoing utilization of these
                                    resources in the community with their primary care provider.
Monitoring and Progression through the Pathway:
    Repeated clinical assessment should be conducted based on Respiratory Assessment Criteria and Bedside PEWS
     criteria for monitoring
    Weaning of salbutamol is based on asthma severity
    Seek medical reassessment for patients who are worsening or whose symptoms persist despite aggressive
     management
    CCRT should be consulted and the Asthma Escalation Pathway initiated for patients with severe asthma who require
     salbutamol < Q1hourly and/or have increasing oxygen requirements
    Spirometry should be ordered for children ≥ 8 years old prior to discharge
          o If spirometry cannot be obtained prior to discharge in the laboratory, consider bedside spirometry performed
               by respiratory therapists
Discharge and Follow Up:
© 2012 The Hospital for Sick Children ('SickKids'). All Rights Reserved. This document may be reproduced or used strictly for non-commercial clinical
purposes. However, by permitting such use, SickKids does not grant any broader license or waive any of its exclusive rights under copyright or
otherwise at law; in particular, this document may not be used for publication without appropriate acknowledgement to SickKids. This Clinical Practice
Guideline has been developed to guide the practice of clinicians at the Hospital for Sick Children. Use of this guideline in any setting must be subject to
the clinical judgment of those responsible for providing care. SickKids does not accept responsibility for the application of this guideline outside
SickKids.
                                                                                                                                            Page 5 of 10
This is a CONTROLLED document for internal use only. Any documents appearing in paper form are not controlled and should be checked against the
electronic SharePoint version prior to use.
© 2012 The Hospital for Sick Children ('SickKids'). All Rights Reserved. This document may be reproduced or used strictly for non-commercial clinical
purposes. However, by permitting such use, SickKids does not grant any broader license or waive any of its exclusive rights under copyright or
otherwise at law; in particular, this document may not be used for publication without appropriate acknowledgement to SickKids. This Clinical Practice
Guideline has been developed to guide the practice of clinicians at the Hospital for Sick Children. Use of this guideline in any setting must be subject to
the clinical judgment of those responsible for providing care. SickKids does not accept responsibility for the application of this guideline outside
SickKids.
                                                                                                                                            Page 6 of 10
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                        MILD                                MODERATE                                     SEVERE                        Caution should be exercised in managing children with the following
                                                                                                                                       comorbidities:
        Salbutamol:                            Salbutamol                                Salbutamol dosage:                            □ Congenital or acquired cardiovascular disease
                                                                                                                                       □ Cystic fibrosis
         Inhaled Q4H via metered dose          Inhaled Q2H via MDI as per e-            Inhaled Q20 minutes x 3; then Q1H
                                                                                                                                       □ Chronic lung disease or bronchopulmonary dysplasia
            inhaler (MDI) as per e-                formulary                                 via MDI (consider nebulized) as per       □ Immunodeficiency syndromes
            formulary                                                                        e-formulary                               □ Sickle Cell Disease
                                               Reassessment:                                                                           □ Multiple co-morbidities
        Reassessment:                           Q1H using RAC                           Reassessment:                                 □ On beta blocker
         Q2H using RAC                                                                   Q30 minutes using RAC; and then
                                                                                            PRN                                        The following treatments are NOT routinely recommended for asthma
                                                                                                                                       management:
                                                                                          MD to reassess, If receiving
                                                                                                                                       □ Methylxanthines
                                                                                            Salbutamol Q1H x 6 hours                   □ Antibiotics except as needed for comorbid conditions
                                                                                                                                       □ Aggressive hydration is not recommended for older children but may be
                                                                                         Considerations:                                 indicated for some infants and young children
                                                                                          Checking serum potassium (if                □ Cardiopulmonary physical therapy
                                                                                            Ventolin Q1h X 6hours)                     □ Mucolytics
                                                                                          Establishing IV access                      □ Sedation
                                                                                          NPO status (administer D5W NS
                                                                                            plus 20mmol/l KCL if NPO)
                                                                                          If patient continues to require < Q1H
                                                                                            Salbutamol: consult CCRT and refer
                                                                                            to Asthma Escalation Pathway for
                                                                                            further management
Discharge Instructions:
                                                  □ Salbutamol inhaler Q4H x 24 hours; then as needed Q4H PRN as per e-formulary
                                                  □ Initiate/resume inhaled corticosteroids (e.g. Fluticasone) for 12 weeks (in total)
        Assess for discharge readiness if;            as per e-formulary
                                                  □ Complete systemic steroid course (total 2 days Dexamethasone or 5 days Prednisone/
             Inhaled Salbutamol is q4h x 2           Prednisolone) as per e-formulary
                         and                      □ Review Paediatric Asthma Action Plan
                                                  □ Review Asthma Teaching Checklist                                                                     Patient discharged home with appropriate follow-up
        Child has mild presentation based         □ Review MDI spacer technique (resources provided from AboutKidsHealth)
           on Respiratory Assessment              □ Ensure family knows to see primary care physician within 72 hours of discharge for re-
                     Criteria                        assessment
                                                  □ Referral to SickKids Outpatient Asthma Clinic is recommended for all patient
                                                    discharged from the hospital
                                                  □ If ≥ 8 years old, spirometry to be completed (in lab or bedside); consult Respiratory
                                                    Medicine if FEV 1 <40
                                                                                                                                                                                                                                                                              Page 7 of 10
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Implementation Plan
           Education and awareness building by the Paediatric Medicine Division’s practice champions during resident/fellow
            orientation, resident educational rounds, and nursing orientation/staff meetings/situational bedside teaching.
           Inpatient Medical Director to communicate updates in practice to the Division of Paediatric Medicine.
           Lead respirologists to communicate updates in practice to the Division of Respirology
           E-formulary to be updated to reflect recommended medications and dosing.
Evaluation Plan
                   Number (#) of patients admitted with acute asthma exacerbations from the Emergency Department to the
                    Paediatric Medicine inpatient wards;
                   Average length of stay of patients admitted with acute asthma exacerbations;
                   # of patients admitted to Paediatric Medicine that required transfer to the PICU;
                   # of patients readmitted with acute asthma exacerbations within 7 days of discharge from the hospital;
                   # of patients representing to the Emergency Department within 48 hours of discharge with recurrence of
                    asthma symptoms;
                                                                                                                                            Page 8 of 10
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Internal reviewers:
5.0 References
     1.    Alberta Health Services. Alberta acute childhood asthma pathway: Evidence based recommendations. 2013.
           http://pert.ucalgary.ca/airways/AHS%20INPATIENT%20CARE%20PATHWAY%20(14x8.5)%202012%20v5.pdf
     2.    Alnaji F, Zemek R, Barrowman N, & Plint A. PRAM score as predicator of pediatric asthma hospitalization. Academic Emergency Medicine.
           2014, 872-878.
     4.    Canadian Paediatric Society. Diagnosis and management of asthma in preschoolers: A Canadian Thoracic Society and Canadian Paediatric
           Society position paper. Canadian Respiratory Journal. 2015, 22(3): 135-143.
     5.    Canadian Paediatric Society. Managing the paediatric patient with an acute asthma exacerbation. Paediatrics and Child Health. 2012, 17(5):
           251-256.
     6.    Canadian Thoracic Society Asthma Clinical Assembly. Canadian Thoracic Society 2012 guideline update: Diagnosis and management of
           asthma in preschoolers, children and adults. Canadian Respiratory Journal. 2012, 19(2): 127-164.
     8.    Kenyon C, Zorc J, Dunn M, McCloskey M, et al. Inpatient asthma pathway. 2016. http://www.chop.edu/clinical-pathway/asthma-inpatient-care-
           clinical-pathway
     9.    Pound C, Gelt V, Akiki S, et al. Nurse-driven clinical pathway for inpatient asthma: A randomized controlled trial. American Academy of
           Pediatrics. 2017, 7(4): 204-213
     10. National Heart, Lung, and Blood Institute (NHLBI). Guidelines for the diagnosis and management of asthma. National Institutes of Health.
         2007, 1-60.
Attachments:
© 2012 The Hospital for Sick Children ('SickKids'). All Rights Reserved. This document may be reproduced or used strictly for non-commercial clinical
purposes. However, by permitting such use, SickKids does not grant any broader license or waive any of its exclusive rights under copyright or
otherwise at law; in particular, this document may not be used for publication without appropriate acknowledgement to SickKids. This Clinical Practice
Guideline has been developed to guide the practice of clinicians at the Hospital for Sick Children. Use of this guideline in any setting must be subject to
the clinical judgment of those responsible for providing care. SickKids does not accept responsibility for the application of this guideline outside
SickKids.
                                                                                                                                            Page 9 of 10
This is a CONTROLLED document for internal use only. Any documents appearing in paper form are not controlled and should be checked against the
electronic SharePoint version prior to use.
© 2012 The Hospital for Sick Children ('SickKids'). All Rights Reserved. This document may be reproduced or used strictly for non-commercial clinical
purposes. However, by permitting such use, SickKids does not grant any broader license or waive any of its exclusive rights under copyright or
otherwise at law; in particular, this document may not be used for publication without appropriate acknowledgement to SickKids. This Clinical Practice
Guideline has been developed to guide the practice of clinicians at the Hospital for Sick Children. Use of this guideline in any setting must be subject to
the clinical judgment of those responsible for providing care. SickKids does not accept responsibility for the application of this guideline outside
SickKids.
Page 10 of 10