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Measuring ranges
QuikRead go software versions ≥4.1 give both the CRP and Hb results.
CRP
For the whole blood samples the measuring range is 5–200 mg/l CRP at the normal
hematocrit level of 40%. If the hematocrit is lower or higher than 40%, the measuring range
will change according to the following table. If the level of hematocrit is outside the range of
15–75 %, the instrument will not display the CRP result.
Sample
Hematocrit %
type
Whole blood
sample
Plasma/Serum
sample
Hemoglobin (Hb)
The measuring range of hemoglobin in whole blood samples is 50–245 g/l (5.0–24.5
g/dl, 3.1–15.2 mmol/l).
13 Traceability of test methods
CRP
The CRP assay included in the QuikRead go CRP+Hb test is standardised according to the
ERM
-DA 472 reference material.
®
Hemoglobin
The hemoglobin assay in the QuikRead go CRP+Hb test is traceable to the ICHS
(cyanmethemoglobin) standard 1995 and the CRM BCR-522 reference material.
14 Disposal
●
Dispose of contents according to national and local law.
●
All patient samples, sampling devices, controls, used tubes, caps and cuvettes should
be handled and disposed of as potentially infectious material.
●
Materials of the components of the QuikRead 101 and QuikRead go kits:
Paper: Instructions for use
Cardboard: Kit box including its inner parts
Plastic: Cuvettes, reagent caps, foil covering cuvette rack, cuvette rack, plungers,
extraction vials and tubes, swabs, plunger and capillary tubes
Glass: Capillaries
Metal: Reagent cap tubes, cuvette lids, plunger and capillary tube caps
Not to be recycled: Lids of reagent cap tubes (several) and magnetic cards (PVC)
●
When used in accordance with Good Laboratory Practice, good occupational hygiene
and the instructions for use, the reagents supplied should not present a hazard to health.
15 Troubleshooting
Error messages
Error messages displayed by the QuikRead go instrument are listed below. For more
detailed information on error messages, consult the QuikRead go instrument instructions
for use.
Error messages
Measurement prohibited.
Please check the reagent
cap.
Measurement prohibited.
Cuvette temperature too low.
Measurement prohibited.
Cuvette temperature too high.
Test cancelled.
Blank too high.
Test cancelled.
Unstable blank.
Test cancelled.
Error in reagent addition.
No result.
Hematocrit too low.
No result.
Hematocrit too high.
Unexpected low and high results
Possible reasons for unexpected low and high results are listed in the table below.
Problem
Possible cause
Unexpected
Too small sample
low result.
volume.
Too large sample
volume.
Unexpected
Too low buffer volume.
high result.
The cuvette is dirty.
Component from
different kit lots or
tests are used.
Unexpected
Incorrect reagent
low/high
storage.
result.
Incorrect sample
volume:
plasma/serum/
control sample
Sample
volume
15–19
20–28
29–35
36–41
42–46
47–50
51–53
54–56
57–60
20 µl
61–62
63–64
65–66
67–68
69–70
71–72
73–74
75
20 µl
–
12 µl
Corrective action
Check that the cuvette has a reagent cap and the
inner blue part of the cap is not pressed down.
Let the cuvette warm up to room temperature
(18...25 ºC). Test the same cuvette again.
Let the cuvette cool down to room temperature
(18...25 ºC). Test the same cuvette again.
Test the same cuvette again. The blanking process has not
been completed or the sample may contain interfering sub-
stances. In the latter case, the test cannot be completed.
Perform a new test. There has been some problem during
reagent addition. Make sure that the cap is properly closed.
If the level of hematocrit in a whole blood sample is below the
hematocrit measurement range of the instrument (see Section
12), no result is shown.
If the level of hematocrit in whole blood samples is above the
hematocrit measurement range of the instrument (see Section
12), no result is shown.
Corrective action
Perform a new test. Make sure that the capillary is
completely filled. Avoid air bubbles.
Perform a new test. Make sure that the capillary is
properly filled. Wipe away any excess sample from the
outside of the capillary.
Perform a new test. Make sure that the volume is
correct by checking that the liquid surface is between
the two lines marked on the cuvette.
Perform a new test. Do not touch the clear flat
surfaces in the lower part of the cuvette.
Perform a new test. Make sure that all the reagents
are from the same kit lot.
Perform a new test. Make sure that the reagents are
stored according to the instructions for use.
Check, that the used sample volume
(20 or 12 µl) matches the set plasma/serum sample
volume on the instrument.
CRP measuring range
mg/l
5–150
5–160
5–180
5–200
5–220
5–240
5–260
5–280
5–300
5–330
5–340
5–360
5–390
5–410
5–440
5–470
5–510
5–120
5–200
In cases when the
result is above or
below the measuring
range, the result will be
displayed,
for example
"> 200 mg/l CRP".
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