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Test Instructions |
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| Pregnancy Test Strips |
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INTRODUCTION
One Step Strip Style HCG Urine Pregnancy Test is a test kit for the determination of hCG (Human Chorionic Gonadotropin) in urine specimens. There is an
appearance of hCG in both urine and serum soon after
conception, and its subsequent rapid rise in concentration
during early gestational growth. This test is used to obtain
a visual, qualitative result for the early detection of
pregnancy.
SPECIMEN COLLECTION & PREPARATION
Urine Assay
A urine specimen must be collected in a dry and clean
container. The first morning urine specimen is preferred since
it usually contains the highest concentration of hCG; however,
urine specimens collected at any time of the day may be
used.
Specimen Storage
Urine specimens may be stored at 2-8°C for up to 48 hours
prior to testing. For prolonged storage, specimens may be
frozen and stored below -20°C. Frozen specimens should be
thawed and stirred before testing.
TEST PROCEDURE
1. To begin testing, open the sealed pouch by tearing along
the notch. Remove the test kit from the pouch and use it
as soon as possible.
2. Immerse the strip into the urine sample with the arrow
end pointing towards the urine. Do not immerse past the
“Mark” Line. Take the strip out after 3 seconds and lay
the strip flat on a clean, dry, non-absorbent surface (such
as the mouth of the urine container).
3. Wait for colored bands to appear. Depending on the
concentration of hCG in the test specimen, positive
results may be observed in as soon as 40 seconds.
However, to confirm negative results, the complete
reaction time of 5 minutes is required. It is important that
the background is clear before the result is read. Do not
read results after more than 30 minutes.
PRECAUTION
1. For in vitro diagnostic use only.
2. Do not use test kit beyond expiry date.
3. The test device should not be reused.
STORAGE AND STABILITY
The test kit can be stored at temperatures between 2 to
30°C in the sealed pouch to the date of expiration. The
test kit should be kept away from direct sunlight,
moisture and heat.
INTERPRETATION OF RESULTS
Negative: Only one color band appears on the control
region. No apparent band on the test region. This indicates
that no pregnancy has been detected.
Positive: Distinct color bands appear on the control and
test regions. Presence of both test line and control line
indicate that you are probably pregnant. The color intensity of
the test bands may vary since different stages of pregnancy
have different concentrations of HCG hormone.
Invalid: No visible band at all or no band appears on the
control (C) region. Repeat with a new test kit. If the problem
persists, discontinue using the test kit immediately and
contact your local distributor.
LIMITATIONS
1. Very dilute urine specimens, as indicated by a low specific
gravity, may not contain representative levels of hCG. If
pregnancy is still suspected, a first morning urine specimen
should be collected 48 hours later and tested.
2. False negative results may occur when the levels of hCG
are below the sensitivity level of the test. When pregnancy
is still suspected, a first morning urine specimen should be
collected 48 hours later and tested.
3. Very low levels of hCG (less than 50 mIU/mL) are present
in urine specimen shortly after implantation. However,
because a significant number of first trimester pregnancies
terminate for natural reasons (5), a test result that is weakly
positive should be confirmed by retesting with a first
morning urine specimen collected 48 hours later.
4. A number of conditions other than pregnancy, including
trophoblastic disease and certain non-trophoblastic
neoplasms including testicular tumors, prostate cancer,
breast cancer, and lung cancer, cause elevated levels of
hCG (6-7). Therefore, the presence of hCG in urine should
not be used to diagnose pregnancy unless these conditions
have been ruled out.
5. This test provides a presumptive diagnosis for pregnancy. A
confirmed pregnancy diagnosis should only be made by a
physician after all clinical and laboratory findings have been
evaluated. |
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