Analytic aspects of cyclosporine monitoring, on behalf of the IFCC/IATDMCT Joint Working Group.

Abstract:

:The use of therapeutic drug monitoring strategies for cyclosporin (CsA) has evolved markedly in recent years since previous consensus guidelines were presented. Apart from the introduction of some new methods, the major change has been the shift away from the traditional predose/trough (C0) sample. The most popular alternative has been shown to be a 2-hour postdose (C2) sample. This has presented a challenge to clinical laboratories where typical C2 sample concentrations exceed the upper limit of the calibration range for their chosen CsA method, hence requiring an accurate dilution to be performed. Data from the Australian/New Zealand survey, as well as that in the International CsA Proficiency Testing Program, have demonstrated both a plethora of dilution protocols and resultant widespread failure of many laboratories to obtain accurate results. This paper compares data from several independent sources, pointing to international problems for reliable CsA measurement in clinical laboratories. This includes the CsA method selection criteria adopted by a large percentage of laboratories in various surveys, indicating that the least specific mFPIA methods have been widely adopted.

journal_name

Ther Drug Monit

authors

Morris RG,Holt DW,Armstrong VW,Griesmacher A,Napoli KL,Shaw LM,IFCC\/IATDMCT Joint Working Group.

doi

10.1097/00007691-200404000-00025

subject

Has Abstract

pub_date

2004-04-01 00:00:00

pages

227-30

issue

2

eissn

0163-4356

issn

1536-3694

journal_volume

26

pub_type

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