Linked Life Data

17938796

Source:http://linkedlifedata.com/resource/pubmed/id/17938796

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2007-10-16
pubmed:abstractText
Managing treatment with vitamin K antagonists, the prothrombin time (PT), expressed as international normalized ratio (INR), may not represent the INR during the entire 24 hour (h) period, and this variation may be different between long-acting phenprocoumon and short-acting acenocoumarol. For both drugs we investigated the variation in 24 h of the PT/INR, the consequencesfor the assessment of the doses and which vitamin K-dependent factor causes the daily variation. Patients on self-management took their medication at 6 p.m. and determined their INRs for eight weeks, once a week and three times daily (8.30 a.m., 6 p.m. and 11 p.m., thus 14.5 h, 24 h and 29 h after taking the medication, respectively). Acenocoumarol showed a significant variation in INRs over the 24 h period, with 22 out of 80 INRs >20% lower at 11 p.m. versus 8.30 a.m. Phenprocoumon showed only few variations. Patients managed by the anticoagulation clinic took their medication at 6 p.m. for four weeks and then at 8 a.m. for four weeks, 15 h and 25 h, respectively, before the weekly blood collection. PT/INR and coagulation factors VII, X and II were determined. With acenocoumarol, taken 25 h before blood collection, the INRs were significantly different compared to 15 h, especially attributed to plasma levels of factor VII. Those on phenprocoumon were equal. These variations of INRs during 24 h may have major effects on the prescribed dose of short-acting vitamin K antagonists, such as acenocoumarol, especially for INRs at the limits of the therapeutic ranges.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0340-6245
pubmed:author
pubmed:issnType
Print
pubmed:volume
98
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
738-46
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
The influence on INRs and coagulation factors of the time span between blood sample collection and intake of phenprocoumon or acenocoumarol: consequences for the assessment of the dose.
pubmed:affiliation
Department Thrombosis Service of Laboratory of Clinical Chemistry and Haematology, Jeroen Bosch Hospital, 's-Hertogenbosch, The Netherlands. j.vangeest@planet.nl
pubmed:publicationType
Journal Article