European Concerted Action on Anticoagulation (ECAA): an assessment of a method for ISI calibration of two whole blood point-of-care PT monitor systems based on lyophilized plasmas using whole blood equivalent PT

被引:9
作者
Poller, L [1 ]
Keown, M
Chauhan, N
Van Den Besselaar, AMHP
Tripodi, A
Shiach, C
Jespersen, J
机构
[1] Univ Manchester, Sch Biol Sci, Cent Facil, ECAA, Manchester, Lancs, England
[2] Leiden Univ, Med Ctr, Haemostasis & Thrombosis Res Ctr, Leiden, Netherlands
[3] Univ Milan, IRCCS, Maggiore Hosp, A Bianchi Bonomi Haemophilia & Thrombosis Ctr, Milan, Italy
[4] Manchester Royal Infirm, Dept Haematol, Manchester M13 9WL, Lancs, England
[5] Univ So Denmark, Dept Thrombosis Res, Esbjerg, Denmark
[6] Ribe Cty Hosp, Dept Clin Biochem, Esbjerg, Denmark
关键词
lyophilized plasma calibrations; Multicentre International Sensitivity Index (ISI); point-of-care test (POCT) monitors;
D O I
10.1046/j.1538-7836.2003.00120.x
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Previously, the attempt to simplify the International Sensitivity Index (ISI) calibration of the CoaguChek Mini whole blood point-of-care test prothrombin time (PT) monitor system was successful using lyophilized plasmas from coumarin-treated patients but not with lyophilized artificially depleted plasmas. With the TAS PT-NC monitor system, both types of plasma failed to provide reliable calibrations. The present study assesses a procedure for the ISI calibration of a TAS PT-NC and CoaguChek Mini whole blood point-of-care test PT monitor systems using lyophilized plasmas. Using lyophilized artificially depleted and coumarin plasma calibrations, we have evaluated a correction for the monitor displayed PT. This was based on a 'line of equivalence' derived from the relationship between whole blood and fresh plasma PT with both types of monitor system. With the TAS PT-NC, the use of this 'line of equivalence' resulted in reliable ISI with both lyophilized coumarin and artificially depleted plasmas. There was no significant difference between mean monitor and mean reference International Normalized Ratio (INR) with the artificially depleted plasmas. With the lyophilized coumarin plasma calibrations there was only a small INR difference. Correction with the 'line of equivalence' therefore facilitates calibration of the TAS PT-NC with lyophilized plasmas. With the CoaguChek Mini, the correction based on the 'line of equivalence' did not improve results but was not required with this system.
引用
收藏
页码:766 / 772
页数:7
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