Roche CoaguChek XS System Bedienungsanleitung PDF herunterladen (Seite 4)

Overview of Warfarin Therapy and the CoaguChek XS System

OVERVIEW

The CoaguChek XS System from Roche Diagnostics measures blood-clotting time

for people who are taking anticoagulation medications such as warfarin (for

example Coumadin

). Warfarin is an oral anticoagulant that changes the

formation of certain blood factors produced in the liver in such a way that the

clotting time is slowed. (Refer to the latest warfarin package insert for

contraindications.) The goal is to prevent clots from forming or moving. At the

same time, however, it is important to avoid excessive anticoagulation, or blood

thinning, which carries a risk of hemorrhage.

People on warfarin therapy must be monitored closely for two reasons. First, as

indicated above, it is very important to keep blood coagulation time within an

optimal therapeutic, or target range. Second, each individual reacts differently to

warfarin, and the medication’s ability to prevent a clot is affected by a person’s

metabolism, diet, and other medications.

The variability of laboratory results due to reagent differences is a common

problem. The CoaguChek XS System minimizes the variability that is seen with

traditional PT/INR assay reagents. Each lot of test strips is compared to a

reference material by Roche Diagnostics. The strips are then assigned a “code,”

which standardizes the reported result via a mathematical algorithm, thus

minimizing lot-to-lot variability. No manual calibration of the system is required;

each lot of strips comes with a code chip that stores the information needed for

automatic calibration.

The CoaguChek XS System offers significant advantages in both convenience

and reliability. It is a hand-held, battery-operated system that can perform a

PT/INR blood test on a fresh whole blood sample from a fingerstick. A test strip

is inserted into the meter and a blood sample applied to the strip. The test result

is displayed in about one minute. The need for trips to the laboratory or for

venipuncture is virtually eliminated.

The CoaguChek System by Roche Diagnostics has been used successfully since

1994 by healthcare professionals in anticoagulation clinics, physicians’ offices,

and home health agencies and since 1997 for self-testing. Now, there is the

CoaguChek XS System available for self-testing. The materials that follow are

designed to help you select appropriate users and train them to use the

CoaguChek XS System properly.

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Roche CoaguChek XS System Bedienungsanleitung Seite 4