BIOLABO
www.biolabo.fr CREATININE K i n e t i c method
MANUFACTURER: Reagent for quantitative determination of creatinine
BIOLABO SAS, in human serum and plasma or urines.
Les Hautes Rives
02160, Maizy, France
REF 80107 R1 1 x 125 mL R2 1 x 125 mL R3 1 x 10 mL
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TECHNICAL SUPPORT AND ORDERS IVD
Tel: (33) 03 23 25 15 50
Made In France
Fax : (33) 03 23 256 256
support@biolabo.fr I: corresponds to significant modifications
Latest revision : www.biolabo.fr
INTENDED USE SAFETY CAUTIONS
I This reagent is designated for professional use in laboratory (manual • Refer to current Material Safety Data Sheet available on request or
or automated method). on www.biolabo.fr
It allows the quantification of creatinine in human serum and plasma or • Verify the integrity of the contents before use.
urines. • Waste disposal: Respect legislation in force in the country.
• All specimens or reagents of biological origin should be handled as
potentially infectious. Respect legislation in force in the country.
GENERALITIES (1)
I Any serious incident that has occurred in connection with the device
Interconversion of phosphocreatine and creatine is a particular feature is notified to the manufacturer and the competent authority of the
of the metabolism processes of muscle contraction. Creatine and Member State in which the user and/or patient is based.
phosphocreatine partially convert to a waste product, creatinine. Thus,
the amount of creatinine produced each day is related to the muscle REAGENTS PREPARATION
mass (and body weight), age, sex, diet or exercise and does not
Mix 1 volume of R1 and 1 volume of R2
greatly vary from day to day.
STABILITY AND STORAGE
PRINCIPLE (4)(5)
Stored away from light, well caped in the original vial at 18-25°C,
Colorimetric reaction (Jaffe reaction) of creatinine with alkaline picrate
and used as described, reagents are stable:
measured kinetically at 490 nm (490-510), without any pre-treatment
step. This reaction has been improved (specificity, speed and Unopened:
adaptability) by the development of an initial-rate method. • Until expiry date stated on the label of the kit.
Once opened:
REAGENTS COMPOSITION ● Transfer requested quantity, well recap vials and store at 18-25°C
R1 CREATININE Reagent 1 ● Separate reagents are stable at least 1 year.
Once reconstituted and free from contamination:
Disodium Phosphate 6.4 mmol/L • Reagent (R1+R2) is stable 30 days at 2-8°C
Sodium hydroxide 150 mmol/L • Discard reagent if cloudy or if its abs. is > 0.300 at 490 nm.
Attention • Don’t use working reagent after expiry date
Met Corr.1: H290 - May be corrosive to metals
Skin Irrit.2 : H315 - Causes skin irritation SPECIMEN COLLECTION AND HANDLING (2)
Eye Irrit.2 : H319 - Causes serious eye irritation Serum or heparinised plasma.
P264: Wash hands thoroughly after handling,
P280: Wear protective gloves/protective clothing/eye protection/face Urines: Collect during precisely timed interval’s (4, 12 or 24 h).
protection, Dilute 1+19 in demineralised water before determination.
P302+P352: IF ON SKIN: Wash with soap and water, Creatinine is stable for 24 h at 2-8°C.
P305+P351+P338: IF IN EYES: Rinse continuously with water for
several minutes. Remove contact lenses if present and easy to do – LIMITS (1) (2) (3) (5)
continue rinsing,
Reading interval is the main determinant for the specificity of the Jaffe
P337+P313: If eye irritation persists, get medical advice/attention, reaction; some interferents act quickly (acetoacetate) and others
P390: Absorb spillage to prevent material damage. slowly (proteins). The majority of kinetic methods recommend a
Classification due to: Sodium Hydroxide 1- < 2.5% For more details, reading interval between 30 and 150 seconds
refer to Safety Data Sheet (MSDS). Some antibiotics interfere also with the determination of creatinine
Le Réactif de travail (R1+R2) est classé comme R1 pur according to Jaffe method.
R2 CREATININE Reagent 2 For a more comprehensive review of factors affecting this assay refer
to the publication of Young D.S.
Sodium dodecyl sulfate 0.75 mmol/L
Picric acid 4.0 mmol/L
pH 4.0 MATERIAL REQUIRED BUT NOT PROVIDED
According to 1272/2008 regulation, this reagent is not classified as 1. Basic medical analysis laboratory equipment.
dangerous 2. Spectrophotometer or Biochemistry Clinical Analyzer
R3 CREATININE Standard 177 µmol/L (2 mg/dL)
EUH210: Safety Data Sheet (MSDS) available on request
According to 1272/2008 regulation, this reagent is not classified as
dangerous
CRE_DT_200a_IFU_80107_EN_V02_20201218
REFERENCE INTERVALS (2) CALIBRATION (6)
Serum or plasma µmol / L mg/dL • REF 95015 Multicalibrator traceable to SRM 914 (according to
ANSM: 1 zero-point, 1 intermediate level and 1 high level)
Male 80-115 0.9 to 1.3
• Standard (vial R3)
Female 53-97 0.6 to 1.1
The calibration frequency depends on proper instrument functions and
on preservation of the reagent.
Urines µmol / kg / 24 h mg / kg / 24 h
Male 124-230 14 to 26 QUALITY CONTROL
Female 97-177 11 to 20 • REF 95010 EXATROL-N Level 1
• REF 95011 EXATROL-P Level 2
GFR (Glomerular filtration rate) mL per minute
• REF 95012 Urinary Controls
Adult < 40 years 120 (100 – 140) • ANSM recommends low, medium and high controls
Adult > 40 years Physiologically decreased approx. 1% every year. • External quality control program.
Each laboratory should establish its own normal ranges for the It is recommended to control in the following cases:
population that it serves. • At least once a run.
• At least once within 24 hours.
PERFORMANCES • When changing vial of reagent.
On Kenza 240TX, 37°C, 505 nm (working reagent) • After maintenance operations on the instrument.
Detection limit: 20 µmol/L (0.23 mg/dL) If control is out of range, apply following actions:
1. Prepare a fresh control serum and repeat the test
Linearity Range: between 35 and 1328 µmol/L (15 mg/dL)
2. If control is still out of range, use a new vial of fresh calibrator
Precision: 3. If control is still out of range, use a new vial of reagent and reassay
Within-run Level Level Level Between run Level Level Level If control is still out of range, please contact BIOLABO technical
N = 20 1 2 3 N = 20 1 2 3 support or your local Agent.
Mean (µmol/L) 54.6 125.8 439.7 Mean (µmol/L) 62.5 134.6 460.8
S.D. µmol/L 1.8 3.6 7.0 S.D. µmol/L 2.6 3.2 7.4 PROCEDURE
C.V. % 3.4 2.8 1.6 C.V. % 4.2 2.4 1.6 Manual method
Analytical sensitivity: approx. 0.017 abs/120 sec for 1 mg/dL (88,5 Let stand reagent and specimens at room temperature.
µmol/L) Working Reagent (R1+R2) 1000 µL
Interferences: Specimen (Note 3) 100 µL
Turbidity Negative interference from 0.250 OD
Mix well. Perform kinetic tests at 37°C (verify constant temperature).
Ascorbic acid No interference up to 2500 mg/dL After 30 seconds read absorbance A1 and exactly 120 sec after
Total bilirubin Negative interference from 200 µmol/L read absorbance A2 at 490 nm (490-510) against distilled water.
Direct bilirubin Negative interference from 29 µmol/L Test tube by tube with water, calibrator, controls and then assays as
specimen
Haemoglobin Negative interference from 71 µmol/L
Glucose No interference up to 966 mg/dL 1- Performances with manual procedure should be validated by user.
2- Kenza applications and other applications proposal are available
Other substances may interfere (see § Limits) on request.
On-board stability: Working reagent is stable 4 days 3- Specimen: serum, plasma, urines diluted (1-19) in demineralised
water and water (zero point).
Calibration Frequency: 4 days
Make a new calibration when changing reagent batch, if quality control
results are found out of the established range and after maintenance
CALCULATION (6)
operations Serum or plasma
(A2 - A1) Assay –(A2-A1) Blank
Performances with Urinary method are available on request
Result = x Standard Concentration
(A2 - A1) Standard-(A2-A1) Blank
Urines diluted with 1+19: Multiply the above result by dilution factor 20
REFERENCES
(1) rd
TIETZ N.W. Text book of clinical chemistry, 3 Ed. C.A. Burtis, E.R. GFR (by creatinine clearance determination):
Ashwood, W.B. Saunders (1999) p. 1241-1245. Using 24 h urine and serum creatinine
(2) Clinical Guide to Laboratory Test, 4th Ed., N.W. TIETZ (2006) p. 316-321
(3) YOUNG D.S., Effect of Drugs on Clinical laboratory Tests, 4th Ed. (1995) Corrected Creatinine Clearance (mL/min) = UCr x V x 1.73
p.3-190 to 3-211 SCr x BSA
(4) Fabiny D. L., et Ertingshausen G., Clin. Chem. ( 1971), 17, p.696-700.
(5) D. Labbé et al., Ann. Biol. Clin. (1996), 54, p. 285 – 298 UCr = Urine Creatinine in mg/dL or µmol/L
SCr = Serum Creatinine in mg/dL or µmol/L
(6) SRM: Standard Reference Material ®
V= Urine volume excreted in mL/min (24 h urine volume/1440)
BSA = Body Surface Area in m2
OR
Using only serum creatinine (by Cockcroft and Gault formula)
Creatinine Clearance = 140 – age in years x 2.12 x weight in Kg x K
Serum Creatinine (µmol/L) x BSA (m2)
K = 1.00 for men or K = 0.85 for women
IVD H2O
Manufacturer Expiry date In vitro diagnostic Storage temperature Dematerialized water Biological risk
REF LOT →
Product Reference See Insert Batch number Store away from light Sufficient for Dilute with
CRE_DT_200a_IFU_80107_EN_V02_20201218
