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Test Directory - INR/Prothrombin Time (POCT)

POCT Equipment

Coaguchek XS Plus or Coaguchek XS Pro

Clinical Indications

Production of rapid INR results may be used to determine anti-coagulant efficacy.

Sample Type

Capillary whole blood (e.g. finger-prick) or venous whole blood (anti-coagulant free).

Sample Container

None required for finger-prick samples.

Sample Volume

10 uL

Sample Handling

The sample must be analysed immediately.

Special Precautions

None.

Turnaround Time

A result is produced within 1 minute.

Reference Range

Disease specific therapeutic range based on level of anticoagulation. Refer to Coagulation nurses for appropriate reference range.

Limitations

The presence of anti-phospholipid antibodies (APAs) such as Lupus antibodies (LA) can potentially lead to elevated INR values. Comparison to an APA-insensitive laboratory method is recommended if the presence of APAs is known or suspected.

Samples from patients on warfarin with an INR <1.5 or >5.0 must be sent to the laboratory for checking.

Time Limit for Additional Tests

Finger-prick samples can only be used once.

f the test result is questionable or if clinical signs and symptoms appear inconsistent with the test result, re-test with a fresh sample or confirm the result by sending a sample to the laboratory.

Training

The test should only be carried out by a trained member of staff.

Hospital Procedure (SOP)

Standard Operating Procedure for the Measurement of Prothrombin Time using the Coaguchek XS Plus Meter

Standard Operating Procedure for the Measurement of Prothrombin Time using the Coaguchek XS Pro Meter


Last edited 16/04/14