a-Amylase EPS Pancreatic

Catalog Number: 20766623322

SYSTEM INFORMATION

Test AMY-P, test ID 0-662 (serum, plasma)

Test AMYUP, test ID 0-663 (urine)

INTENDED USE

In vitro test for the quantitative determination of the catalytic activity of pancreatic a-amylase (EC 3.2.1.1; 1,4-a-D-glucan: glucanohydrolase) in human serum, plasma, and urine on COBAS INTEGRA systems.

STORAGE AND STABILITY

Shelf life at 2-8 °C See expiration date on cobas c pack label
COBAS INTEGRA 400 plus system
On-board in use at 10-15 °C 12 weeks
COBAS INTEGRA 800 system
On-board in use at 8 °C 12 weeks

APPLICATION FOR SERUM, PLASMA AND URINE

COBAS INTEGRA 400 PLUS TEST DEFINITION

Measuring mode Absorbance
Abs. calculation mode Kinetic
Reaction mode R1-S-SR
Reaction direction Increase
Wavelength A/B 409/659 nm
Calc. first/last 51/63
Unit U/L

PIPETTING PARAMETERS

Serum/plasma/urine Diluent (H2O)
R1 100 µL
Sample 4 µL 10 µL
SR 20 µL
Total volume 134 µL

Serum/plasma/urine Diluent (H2O)
R1 100 µL
Sample 4 µL 10 µL
SR 20 µL
Total volume 134 µL

COBAS INTEGRA 800 TEST DEFINITION

Measuring mode Absorbance
Abs. calculation mode Kinetic
Reaction mode R1-S-SR
Reaction direction Increase
Wavelength A/B 409/659 nm
Calc. first/last 74/94
Unit U/L

PIPETTING PARAMETERS

Serum/plasma/urine Diluent (H2O)
R1 100 µL
Sample 4 µL 10 µL
SR 20 µL
Total volume 134 µL

CALIBRATION

Traceability: This method has been standardized against the Roche system reagent using calibrated pipettes together with a manual photometer providing absolute values and the substrate-specific absorptivity, e.

Calibrator Calibrator f.a.s.
Use deionized water as zero calibrator.
Calibration mode Linear regression
Calibration replicate Duplicate recommended
Calibration interval Each lot and as required following quality control procedures

LIMITS AND RANGES

MEASURING RANGE

Serum/plasma/urine

3-1500 U/L (0.05-25 µkat/L)

Determine samples having higher activities via the rerun function. Dilution of samples via the rerun function is a 1:10 dilution. Results from samples diluted using the rerun function are automatically multiplied by a factor of 10.

Lower detection limit

Lower detection limit of the test:

3 U/L (0.05 µkat/L)

The lower detection limit represents the lowest measurable analyte level that can be distinguished from zero. It is calculated as the value lying 3 standard deviations above that of a zero sample (zero sample + 3 SD, repeatability, n = 30).

SPECIFIC PERFORMANCE DATA

Representative performance data on COBAS INTEGRA analyzers are given below. Results obtained in individual laboratories may differ.

PRECISION

Precision was determined using human samples and controls in an internal protocol with repeatability (n = 20) and intermediate precision (2 aliquots per run, 2 runs per day, 20 days). The following results were obtained:

Serum/plasma

Urine

Level 1 Level 2
Mean 32 U/L(0.53 µkat/L) 184 U/L(3.1 µkat/L)
CV repeatability 1.2 % 0.91 %
CV intermediate precision 1.7 % 1.6 %

Level 1 Level 2
Mean 59 U/L(0.99 µkat/L) 180 U/L(3.0 µkat/L)
CV repeatability 1.0 % 0.87 %
CV intermediate precision 1.2 % 1.1 %

METHOD COMPARISON

Pancreatic a-amylase values for human serum, plasma, and urine samples obtained on a COBAS INTEGRA 700 analyzer using the COBAS INTEGRA a-Amylase EPS Pancreatic reagent (y) were compared with those determined using commercially available reagents for pancreatic a-amylase on an alternative clinical chemistry system (x). Samples were measured in duplicate. Sample size (n) represents all replicates.

Serum/plasma

Sample concentrations were between 0 and 765 U/L (0 and 12.8 µkat/L).

Alternative system
Sample size (n) 246
Corr. coefficient (r) = 0.999
(rs) = 0.994
Linear regression y = 1.03x + 0.3 U/L
Passing/Bablok21 y = 1.03x + 0.0 U/L
Sample concentrations were between 1.6 and 1310 U/L (0.03 and 21.9 µkat/L).UrineAlternative systemSample size (n)106Corr. coefficient(r) = 0.999(rs) = 0.976Linear regressiony = 1.00x + 1.4 U/LPassing/Bablok21y = 1.00x + 1.2 U/L