Quality Assurance
Phadia 100 - User Manual
P a g e 8 . 6
12-3501-20/12
Quality Control of Specific IgE Assays
At least two or three of the most frequently used allergens in the laboratory should
be monitored. ImmunoCAP Specific IgE Negative Control should be used to
control the low end of the assay measuring range.
In each assay run, the above selected allergens are included in sets of single
determinations in every run of patient tests. The results are plotted in a control
chart.
The ranges, for ImmunoCAP Specific IgE Control, mean ±2 SD and mean ±3 SD
for each allergen, from approx. 20 determinations are calculated. For a well
functioning assay, 95% and 99%, respectively, of all the following observations
should fall within the calculated ranges as long as the same lot of ImmunoCAP
Specific IgE Control is used. The mean value for each allergen should fall within
the range given in the kit insert. The package insert values are calculated from
repeated analysis of the control sample using different production lots of
reagents and ImmunoCAP per allergen. The results for ImmunoCAP Specific
IgE Negative Control should all be negative (<0.35 kU
A
/l).
Preferable way to run QC
Use the minimum- and maximum-range values given in the Directions for Use
for the Quality Control, or for EliA on the package certificate. Run a minimum
of 20 assay runs to get the mean for the expected value and expected standard
deviation in the Quality Control log. Now you can use these obtained values for
expected concentration and standard deviation. It is recommended to use 3 as
the standard deviation limit.
The mean and SD should be recalculated at regular intervals when more data
are collected. For Phadia 100 this is done using the inbuilt software. In this way
the laboratory range for each allergen will be more precise, thus avoiding false
alarms due to erroneous target value and limits. For a stable analytical process,
the mean and SD will not differ much between the recalculations.
The replicates within one assay run should be used to monitor any within-run
trends.
Example of
ImmunoCAP
Specific IgE Control insert, revised March 2006
ImmunoCAP Specific IgE
Vial lot Number/Numéro de lot/Chargennr./Batch nummer/Lotto n./Lote número/Lot nummer/Número do
lote do frasco:
BNMAB
d1
D. pteronyssinus
9.8 - 18
e1
Cat dander
14 - 25
f14
Soya bean
5.3 - 10
g6
Phleum pratense
14 - 26
m6
Alternaria alternata (A. tenuis)
5.3 - 10
t3
Betula verrucosa
4.8 - 8.9
w1
Ambrosia elatior
10 - 19
Range/Gamme/
Bereich/Område/
Range/Rango/
Gränsvärde/Intervalo
kU
A
/l
Allergen/Allergéne/
Allergen/Allergen/
Allergene/Alergeno/
Allergen/Alergénio
Содержание Phadia 100
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Страница 348: ...Phadia 100 User Manual Index 12 3501 20 12 Page 15 1 15 Chapter 15 Index...