Peroral anticoagulant therapy--are the TT-values reliable?
Eilertsen, H.; Asprang, A.F.; Ulveland, K.; Nerdrum, H.J.
Tidsskrift for den Norske Laegeforening Tidsskrift for Praktisk Medicin Ny Raekke 118(11): 1690-1692
1998
ISSN/ISBN: 0029-2001 PMID: 9621756 Document Number: 496227
As part of the Norwegian Medical Association's quality assurance programme for the primary health care sector we have investigated the lasting quality of the specimens drawn for determination of Thrombotest. Blood drawn into siliconated glass tubes resulted in varying Thrombotest values, depending on the time of analysis after specimen collection. Reliable Thrombotest values are needed to be able to administer the correct dosage of warfarin. Thrombotest analysis should therefore be performed within two hours, or after 48 hours of specimen collection.