see attached file page 2 !!!!!!!!!!!!!!!!!!!!!!!!
Tests
This is a CLIA waived system. These test strips are to be used with the
CoaguChek System.
Intended Use
For quantitative prothrombin time (PT) testing in fresh capillary or venous
whole blood with the CoaguChek System by professional healthcare
providers.
Cat. No. 3116247
48 Test Strips
1 Code Chip
Introduction
Blood coagulation is one of the body’s protective responses. Blood clots
(thrombi) form as a direct response to vessel injury, preventing excessive
loss of blood. Certain disease conditions require oral anticoagulants,
sometimes known as blood thinners. Warfarin, which is sometimes
known as Coumadin®, is a commonly used anticoagulant. Patients on
warfarin must be carefully monitored to ensure the anticoagulant level is
maintained in the therapeutic range. One method for monitoring the
anticoagulant level is by using the one-stage Prothrombin Time (PT) Test.
The CoaguChek Systems Test uses a modified version of this method.
Test Principle
The CoaguChek Systems Test, used as directed with the CoaguChek
Monitor, will accurately measure blood PT values. After placing a drop of
fresh whole blood on the test strip, the blood is drawn into the reaction
chamber and mixed with reagents that cause coagulation to begin. In the
test strip, tiny iron particles are mixed with the sample. Alternating
magnetic fields cause the iron particles to move within the sample.1 The
endpoint is reached when the blood clot stops the iron particles from
moving. The PT result is then displayed by the monitor.2
Read the CoaguChek System User’s Manual for complete instructions.
If you have questions, call Point of Care Technical Service Center at
1-800-428-4674, 24 hours a day, 7 days a week.
Reagents
Each test strip contains rabbit thromboplastin, stabilizers, and
preservatives.
Precautions and Warnings:
1. For in vitro diagnostic use. Do not take internally.
2. Exercise the normal precautions required for handling all blood
specimens and laboratory reagents. Follow your facility’s infection
control guidelines.
3. CoaguChek Systems Tests may be performed with fresh capillary
whole blood from a fingerstick or fresh venous whole blood drawn in
an anticoagulant-free plastic syringe.
4. Never add more blood to the test strip after the test has begun, or
perform another test using the same fingerstick.
Storage and Stability:
• Keep strips in the original sealed foil pouches.
• Store strips in refrigerator at +2°C to +8°C (+36°F to +46°F) until
ready to use. Do not freeze. Test strips are stable for 60 days or until
the expiration date, whichever comes first, when stored at room
temperature (below 32°C or 90°F).
• Remove only the necessary number of foil pouches from the
refrigerator needed to perform a test(s). Test strips must be out of the
refrigerator for at least five minutes before use.
• Once the foil pouch has been opened, use the strip within four
minutes.
Before Testing
Gather the necessary materials:
• CoaguChek Monitor
• CoaguChek Systems Tests
• Test Strip Code Chip
• Alcohol wipe
• Cotton ball
For capillary specimen collection, you will need:
• Lancets
• Lancet device
• CoaguChek Capillary Blood Collection System, Cat. No. 461 (optional)
For venous specimen collection, you will need:
• Plastic syringe free of anticoagulants.
• Syringe needle should be 23 gauge or larger. A 21 gauge or larger
needle is recommended.
• Tourniquet
1. If you are using test strips from a new unopened box, you will need
to change the Test Strip Code Chip. The first three numbers after
the lot symbol on the test strip pouch should match the numbers on
the Test Strip Code Chip. To install the Test Strip Code Chip:
• Turn the monitor off.
• Remove and discard the old Code Chip, if one is installed.
• Insert the new Test Strip Code Chip until it snaps into place. Make
sure the label side with code number is up.
• Refer to the CoaguChek User’s Manual for additional information.
2. Remove foil pouch from refrigerator. Test strips must be out of the
refrigerator for at least five minutes before use.
3. For capillary sample collection:
Prepare lancet device according to manufacturer’s instructions.
• Set aside until needed.
Prepare capillary collection device (optional).
• Firmly insert end of capillary tube into the capillary bulb. With
each new bulb, be sure to completely insert the capillary tube
into the bulb.
• Set aside until needed.
4. For venous sample collection:
• Prepare a plastic syringe that is free of anticoagulants. The
sample must be used immediately after collection.
• Plasma or serum cannot be used as a testing sample.
• Glass tubes or syringes must not be used.
Testing
The CoaguChek Systems Test uses only fresh capillary or venous, nonanticoagulated
whole blood. Depending on the sample collection method,
use method A or B as they apply below.
1. Place monitor on a flat, horizontal surface, free of vibrations, before
testing.
2. Turn the monitor on. When PERFORM TEST? appears on the display,
press the YES button and the instruction INSERT STRIP will appear.
3. Open foil pouch at the tear mark on the side of the pouch and remove
test strip.
4. Insert strip into monitor, printed side up. Make sure you insert the test
strip in the direction of the printed arrows. You will see the yellow
sample target area through the strip. The monitor displays IS THIS A
CONTROL? Press the NO button. The monitor then displays PLEASE
WAIT. The monitor will warm the strip for about 45 seconds.
5. When monitor displays APPLY SAMPLE prepare to collect the fresh
whole blood sample.
Method A - Capillary sample collection
• Clean finger with alcohol wipe or use soap and warm water. Dry
finger thoroughly.
• Stick the fingertip by placing the tip of lancet device against the
bottom side of the finger and pushing the trigger button. Gently
squeeze finger until a hanging drop of blood forms.
• Touch the capillary tube to the blood drop. Fill the capillary tube
halfway. Avoid getting air bubbles into the sample. Do not touch the
bulb during sample collection. If blood gets into the capillary bulb
during sample collection, discard the bulb.
• Put finger over hole at the top of the capillary bulb. When the
monitor displays APPLY SAMPLE, hold the capillary tube directly over
the sample target area of the test strip. While keeping finger over
the hole, gently push down the top of the bulb until the sample has
been expelled onto the sample target of the test strip. Make sure the
test strip is flat when testing. Make sure the sample touches the
channel surrounding the yellow target zone. The entire target area of
the test strip must be completely filled.
• Apply sample to test strip within 15 seconds of lancing the fingertip.
Note: Blood may also be applied directly from the finger to the
sample target area. The entire target area must be filled completely
with one hanging drop of blood.
Method B - Venous sample collection
• When the monitor displays APPLY SAMPLE, draw the venous sample
into a plastic syringe free of anticoagulants.
• Discard the first four drops of blood from the needle, then
immediately place one drop of blood from syringe needle directly
onto the center of the sample target of the test strip. Make sure the
test strip is flat when testing. Make sure the sample touches the
channel surrounding the yellow target zone. The entire target area of
the test strip must be completely filled.
6. When the blood enters the testing area of the strip, the monitor will
display TESTING along with a progress bar. Do not add more blood or
touch the test strip while TESTING is displayed. The strip should not be
disturbed until the monitor displays the PT value.
7. Remove the test strip.
8. The monitor stores the PT value in memory, along with the date and
time the test was performed. You may also record the PT value in a log
book.
9. Carefully discard lancet and capillary tube or needle and syringe and
the used test strip according to proper infection control guidelines.
Expected Results
CoaguChek System test results are displayed in units equivalent to
laboratory plasma measurements. Results may be displayed in the
International Normalized Ratio (INR=(PT/Median Normal PT)ISI), seconds,
% Quick (a unit used mainly by healthcare professionals in Europe), and
as a ratio relative to normal (PT/Median Normal PT).
Normal PT levels vary from person to person. The median normal PT
(MNPT) from at least 30 healthy, warfarin-free individuals is determined
for each lot of reference reagent to which each strip lot is calibrated to
12.0 seconds (or a ratio of 1). This corresponds to an INR of 1.0. The
median PT is usually a good approximation of the geometric mean.3
Patient results in seconds are that which would be expected for a
reagent and instrument system with an International Sensitivity Index
(ISI) of 2.0. INRs derived from the CoaguChek System are a result of
calibration to a plain rabbit brain thromboplastin reagent tested on an
optical instrument having an ISI of about 2.0.
The physician must determine the best PT level depending on the reason
for anticoagulant treatment and how each individual responds to
treatment (based on Prothrombin Time). Each physician should establish
expected values for his or her patient population or individual patients.
In the field of prothrombin testing, variations in reaction mixture
composition, thromboplastin tissue type, and system sensitivity may
cause some variation in results when comparing results from different
laboratory methodologies on the same patient.4
Unusual Results
If the patient’s PT value seems unusually low or high and you have
performed the testing procedure correctly, run a control.
If the control is out of the acceptable range, the following can cause
unusually low or high results:
- Control used after expiration date.
- Foil pouch opened and strip not used within four minutes.
- Sealed foil pouch stored improperly.
- Foil pouch damaged.
- Maintenance and cleaning procedures have not been followed. See the
CoaguChek System User’s Manual for these procedures.
If the control is in the acceptable range, the system is working properly. If
the result does not match the clinical symptoms, repeat the patient test
to rule out procedural error. There are many reasons why the patient may
demonstrate unusual results. In the field of prothrombin testing, certain
drugs may affect PT results by affecting warfarin pharmacology. The
potential effect of a drug interaction with warfarin or the effect of
underlying diseases (e.g., liver disease, congestive heart failure) must be
considered when interpreting a result. Any unexpected results should
always be followed up with appropriate coagulation studies and inquiries
to define the cause of the unusual result.
Call Point of Care Technical Service Center at 1-800-428-4674, 24 hours
a day, if you have any questions.
Quality Control
Quality control testing ensures the user’s technique, integrity of the test
strips, and performance of the monitor and strips together. Daily control
testing is good laboratory practice and required by most states. Always
check with the appropriate licensing or accrediting bodies to ensure your
quality control program meets the established standards.
Frequency of Testing Requirements-Waived Testing:
• Daily Requirements:
Two levels of Electronic Quality Control or two levels of liquid quality
control (Cat. No. 7745) must be tested to verify proper monitor
performance.
• Additional Requirements:
1. Two levels of liquid controls must be tested and results must be
within the designated range for the following situations:
You open a new box of test strips
You suspect improper storage or handling of the strips
Patient PT results are unusually high or low
2. Two levels of Electronic Quality Control or two levels of liquid quality
control must be tested if the monitor is dropped or mishandled.
The results must be within the designated range.
Frequency of Testing Requirements-Moderate Complexity Testing
Daily quality control testing is good laboratory practice. It is also required
by most states and by CLIA ’88 regulations. Check with the appropriate
licensing or accrediting bodies to ensure that your quality control program
meets established standards.
• Daily Requirements
A two level Electronic Quality Control device (Cat. No. 2032155) or Liquid
Quality Controls may be tested to verify proper monitor performance.
• Additional Requirements
A Liquid Quality Control (Level 1 or 2) should be tested when:
1. A new shipment of test strips is received
2. A new lot number of strips is opened
3. Improper storage or handling of the strips is suspected
4. Patient PT results are unusually high or low
This testing is in addition to the daily EQC testing. The results must be
within the designated ranges.
Be sure to use the appropriate controls for your system: CoaguChek
System—Use Cat. No. 7745.
The CoaguChek System Controls are available from your local CoaguChek
System dealer or from Roche Diagnostics.
Control tests are performed in a similar way as blood tests, using the
CoaguChek System Control instead of blood. The control instructions
should be read before using the controls. The system is working properly
if the control value displayed by the monitor is within the acceptable
range for the control solution tested. The acceptable control range can
be found in the control package on the CoaguChek System Control
Values Sheet. If the value is not acceptable, see the CoaguChek Control
package insert instructions. Call Point of Care Technical Service Center
at 1-800-428-4674, 24 hours a day, 7 days a week if you have any
questions.
Limitations of Procedure
The CoaguChek Systems Test uses only fresh, capillary or venous whole
blood. Plasma or serum cannot be used.
Use only plastic syringes without anticoagulants or additives. Glass tubes
or syringes must not be used.
The blood drop must be a minimum of 10 µL in volume. Low sample
volume will cause a SAMPLE ERROR - REMOVE STRIP warning.
This test measures PT results in persons on warfarin-type (Coumadin®)
therapy. This test should not be used to monitor persons on heparin
therapy. In vitro studies showed the CoaguChek Systems Tests are
sensitive to levels of heparin over 0.15 U/mL.
When a patient is on intravenous infusion therapy, do not collect sample
from arm receiving infusion line.
Hematocrit ranges between 32-52% do not significantly affect test
results.
No interference was found in lipemic samples containing up to 500
mg/dL of triglycerides. Testing performed with in vitro-spiked samples
indicated bilirubin up to 20 mg/dL and hemolysis up to 500 mg/dL did
not significantly affect test results.
The presence of anti-phospholipid antibodies (APAs) such as Lupus!!!!!!!!!!!!!!!!!!
antibodies (LA) can potentially lead to prolonged clotting times, i.e.,
elevated INR values. A comparison to an APA-insensitive laboratory
method is recommended if the presence of APAs is known or suspected.5
Sources of error
If problems occur when performing tests, please check the following:
• Have you used a wrong Test Strip Code Chip? The first three
numbers after the lot symbol on the test strip pouch should match
the numbers on the Test Strip Code Chip.
• The test result may be affected by hematocrit values outside the
range 32% to 52%.
• In rare cases, patients with long clotting times (>8 INR, >33.9 sec)
may produce a test error. If test errors persist, results must be
confirmed with an alternative test method. Contact the patient's
physician.
• Have you performed the test in accordance with the User’s Manual
and this package insert?
• Have you used correctly stored test strips (see ”Storage and
Stability”)?
• Have you moved the test strip between sample application and the
display of the result? Do not touch or move the test strip after
having applied the drop of blood. Also, do not attempt to apply
additional blood to the test strip once a first drop has been applied
(no double-dosing). In either case the monitor displays an error
message and a measurement with a new test strip will be
necessary.
• Are the test strip guide and the door clean?
Performance Characteristics
Verified Clinical Range: In clinical trials, patients tested in the 9.6 to
33.9 second range (0.6 to 8.0 INR). Performance outside this range has
not been verified.
Sensitivity: The CoaguChek System is sensitive to deficiencies of Factors
II, V, VII, and X.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Accuracy: The CoaguChek System was compared against the
CoaguChek Plus Protime Test System and the MLA 700 Analyzer. The
following accuracy data was obtained:
INR Scale Seconds Scale
Capillary Whole Blood Capillary Whole Blood
CoaguChek vs. CoaguChek Plus CoaguChek vs. CoaguChek Plus
n = 81 n = 81
y = 0.864x - 0.002 y = 0.945x - 0.1
r = 0.966 r = 0.970
Venous Whole Blood Venous Whole Blood
CoaguChek vs. CoaguChek Plus CoaguChek vs. CoaguChek Plus
n = 81 n = 81
y = 1.022x - 0.2 y = 1.033x - 0.8
r = 0.952 r = 0.962
Capillary Whole Blood Capillary Whole Blood
CoaguChek vs. MLA 700 CoaguChek vs. MLA 700
Plasma Reference Plasma Reference
n = 81 n = 81
y = 0.793x + 0.2 y = 0.825x + 1.6
r = 0.983 r = 0.985
Venous Whole Blood Venous Whole Blood
CoaguChek vs. MLA 700 CoaguChek vs. MLA 700
Plasma Reference Plasma Reference
n = 81 n = 81
y = 0.862x + 0.2 y = 0.859x + 1.3
r = 0.984 r = 0.985
CoaguChek CoaguChek
Venous vs. Capillary Venous vs. Capillary
n = 81 n = 81
y = 1.077x - 0.07 y = 1.036x - 0.2
r = 0.992 r = 0.995
Precision:
Within-Day
Commercial Control Material
INR Scale Seconds Scale
Level 1 Level 2 Level 1 Level 2
n 20 20 20 20
Mean 1.03 3.66 12.24 23.01
SD 0.05 0.48 0.33 1.43
CV% 4.56 12.98 2.70 6.23
Day-To-Day
Commercial Control Material
INR Scale Seconds Scale
Level 1 Level 2 Level 1 Level 2
n 20 20 20 20
n 48 48 48 48
Mean 1.07 3.72 12.56 23.19
SD 0.07 0.31 0.47 0.94
CV% 6.66 8.41 3.71 4.06
Whole Blood
(Precision of Patient Duplicate Measurements)
INR Scale Seconds Scale
Capillary Venous Capillary Venous
n 81 81 81 81
Mean 2.16 2.26 17.2 17.6
SD 0.11 0.10 0.37 0.33
CV% 5.23 4.44 2.17 1.89
Return Policy
If there is a problem with the CoaguChek Systems Tests, you may be
asked to return them, along with the Test Strip Code Chip, to Roche
Diagnostics. Before returning, call the Point of Care Technical Service
Center at 1-800-428-4674. You will be mailed a return authorization label
which must be put on the shipping carton. Packages received without
this label will be returned at your expense.
References
1 Plonsey R, Collin RE. Magnetic field in material bodies. In: Principles
and applications of electromagnetic fields. New York: McGraw-Hill Book
Co., p. 226-57, 1961.
2 Oberhardt BJ, Taylor M, Alkadi ZY, Dermott SC. Diagnostic assay system
for convenient monitoring of oral anticoagulant therapy {Abstract}.
Thromb Haemostas, 1989;62:327.
3 Loeliger EA, van den Besselaar AMHP and Lewis SM., Reliability and
clinical impact of the normalization of the prothrombin times in oral
anticoagulant control. Thromb Haemostas, 1985;53:148-154.
4 Kaatz SS, White RH, Hill J, Mascha E, Humphries JE, and Becker DM,
"Accuracy of Laboratory and Portable Monitor International Normalization
Ratio Determinations." Arch. Intern. Med. 1995;155:1861-1867.
5 Moll, S. and Ortel, TL “Monitoring Warfarin Therapy in Patients with
Lupus Anticoagulants.” Annals of Internal Medicine 1997;127:177-185.
Additional Information
Refer to the CoaguChek User’s Manual for additional information about your
system.
If you still have questions, call Point of Care Technical Service Center at
1-800-428-4674, 24 hours a day, 7 days a week.
CoaguChek™
Systems
FOR COAGUCHEK SYSTEM
This system (monitor and test strips) and its use are covered by one or more of the
following U.S. Patents: 4,849,340; 5,110,727; 5,164,598; 5,300,779; 5,522,255;
5,686,659; 5,710,622; 5,789,664; 5,792,944; 5,832,921; 5,886,252 and Des. 361,129.
The test strips are covered by U.S. Patent No. 5,488,816; and 5,975,153.
COAGUCHEK is a trademark of a Member of the Roche Group.
Coumadin is a trademark of DuPont Pharmaceutical Company.
Manufactured for:
Roche Diagnostics Corporation
9115 Hague Road,
Indianapolis, IN 46256
©2002 Roche Diagnostics. All rights reserved.
056194603-1202