Linked Life Data

15175800

Source:http://linkedlifedata.com/resource/pubmed/id/15175800

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2004-6-3
pubmed:abstractText
Treatment with the direct thrombin inhibitor argatroban (ARG) is often followed by vitamin K-antagonist treatment (VKA). Phenprocoumon (PC) and acenocoumarol (AC) are frequently used in Europe. The standard monitoring test for VKA, pro-thrombin time (PT), is prolonged by direct thrombin inhibitors. Therefore the International Normalized Ratio (INR) obtained during combined treatment does not reflect the true effect of the VKA. A similar interference of the VKA on the activated partial thromboplastin time (aPTT), a monitoring assay for direct thrombin inhibitors, can occur. In 39 healthy volunteers the effect of ARG alone or combined with PC or AC on PT, INR, aPTT, and Ecarin Clotting Time (ECT) was investigated. 6 groups each of 6-8 volunteers received a 5-hour infusion of either 1.0, 2.0 or 3.0 microg/kg/min ARG (days 1, 3, 4 and 5) before initiation of either PC or AC (day 1) and during continued VKA dosing (target INR 2-3). A linear relationship (INR(ARG+VKA) = intercept + slope * INR (VKA alone)) was observed between the INR measured "on" and "off" ARG. The slope depended on the argatroban dose and on the International Sensitivity Index (ISI) of the PT reagent, the steepest slope (i.e., the largest difference between INR (ARG+VKA) and INR (VKA alone)) was seen with the highest ARG dose and the PT reagent with an ISI of 2.13. There was a close correlation between plasma levels of ARG and aPTT or ECT. Under VKA the ARG-aPTT relationship indicated an increased sensitivity of the aPTT to ARG, VKA treatment had no effect on the prolongation of the ECT induced by argatroban. In conclusion, ARG at doses up to 2 microg/kg/min can be discontinued at an INR of 4.0 on combined therapy with VKA, as this would correspond to an INR between 2.2 and 3.7 for the VKA. If it is necessary to monitor ARG in the critical transition period, the ECT which is not influenced by VKA can be used as an alternative to the aPTT.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0340-6245
pubmed:author
pubmed:issnType
Print
pubmed:volume
91
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1137-45
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed-meshheading:15175800-Acenocoumarol, pubmed-meshheading:15175800-Administration, Oral, pubmed-meshheading:15175800-Adult, pubmed-meshheading:15175800-Anticoagulants, pubmed-meshheading:15175800-Blood Coagulation, pubmed-meshheading:15175800-Blood Coagulation Tests, pubmed-meshheading:15175800-Drug Monitoring, pubmed-meshheading:15175800-Drug Therapy, Combination, pubmed-meshheading:15175800-Endopeptidases, pubmed-meshheading:15175800-Humans, pubmed-meshheading:15175800-International Normalized Ratio, pubmed-meshheading:15175800-Male, pubmed-meshheading:15175800-Partial Thromboplastin Time, pubmed-meshheading:15175800-Phenprocoumon, pubmed-meshheading:15175800-Pipecolic Acids, pubmed-meshheading:15175800-Prothrombin Time, pubmed-meshheading:15175800-Regression Analysis, pubmed-meshheading:15175800-Statistical Distributions
pubmed:year
2004
pubmed:articleTitle
Transition from argatroban to oral anticoagulation with phenprocoumon or acenocoumarol: effects on prothrombin time, activated partial thromboplastin time, and Ecarin Clotting Time.
pubmed:affiliation
Pharmazentrum Frankfurt, Institute for Clinical Pharmacology, University Hospital, Frankfurt am Main, Germany. harder@em.uni-frankfurt.de
pubmed:publicationType
Journal Article, Clinical Trial, Randomized Controlled Trial, Research Support, Non-U.S. Gov't