CoaguChek S PR/INR meters
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Instruments Roche Coaguchek S Roche CoaguChek XS |
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POCT Test Name
PR/INR (Prothrombin Ratio/International Normalised Ratio)
Instruments
Roche Coaguchek S or XS
Designed for self-testing of stabilised patients on warfarin therapy.
Capillary blood samples are measured on a disposable test strip with an answer in a few seconds.
Location within CDHB
1. Paediatric Outpatients- there are about 12 CoaguChek S meters located at individual homes of post cardiac paediatric patient.
2. Cardiac Cath Lab (CoaguChek XS) Christchurch Hospital
3. Cardiothoracic Ward, (CoaguChek XS) Christchurch Hospital.
4. Haemostasis Unit, CHLabs
Tests measured
PR/INR
Sample and volume requirements
One drop of capillary blood. First drop is retained.
Consumables
CoaguChek S
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CoaguChek System: meter, including batteries, system carry case, 1 Softclix, 25 Softclix lancets, power adapter and manual. Catalogue number: 2 138 913
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CoaguChek PT Test: packs of 12; Catalogue number 0 937 634
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CoaguChek PT Test: packs of 48; Catalogue number 0 937 642
CoaguChek XS
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CoaguChek XS System: meter, including 4 AAA batteries, system carry case, 1 lancing device, 20 lancets, manual. Product Code: 04 625 358 017
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CoaguChek XS Test Strips: 1 vial of 24; Product Code: 04 625 358 017
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CoaguChek XS Test Strips: 2 vials of 24 (discounted); Product Code: 04 625 315 017
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Softclix XL Lancets: Product Code: 03 307 514 001
Freephone (NZ): 0508 MY LIFE (0508 695 433)
Controls
CoaguChek S: Electronic 2-level QC (For XS, see POCT Coordinator).
Coaguchek PT Controls, vials containing control material for monitoring therapeutic range; packs of 4 vials; Catalogue number 1 937 669. (X only)
No controls are available for the XS. An electronic self check occurs before each test.
Reference Range
Normal Range 0.8 - 1.2
Therapeutic range (warfarin) 2.0 - 4.0
Sources of Error
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Excessively cold or hot temperatures when storing test strips
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Expired reaction strips
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Incorrect calibration chip inserted
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Poor correlation between methodologies offered by different laboratories. Use of consistent Laboratory Service vs CoaguChek S is essential.
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Correlations between capillary whole blood and venous plasma samples on CoaguChek S have proved not to be linear above 3.0. Please refer to the Haemostasis Laboratory (ext. 80374) for more information. (This inconsistency has been resolved in the CoaguChek XS meter).
QC
Paediatric home users checked annually at the time of meter checking by Roche.
An electronic dual level QC check and liquid QC are analysed at the same time. Records are available for inspection. Contact the POCT Coordinator.
Competency
Available. Contact the POCT Coordinator.
