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A comparative study of the effects of aspirin and paracetamol (acetaminophen) on platelet aggregation and bleeding time.

Abstract：

:In a double blind, randomised trial, the effects of 1 g aspirin and 1 g paracetamol were compared on bleeding time and platelet aggregation in 40 volunteers (20 females). Also investigated was the relationship between plasma aspirin esterase activity and both bleeding time and platelet aggregation after aspirin. Following 1 g aspirin there was a significant increase in bleeding time at 24 h (p less than 0.01). A significant reduction (P less than 0.01) in platelet aggregation with collagen was observed at 1, 6 and 24 h after aspirin, but no significant reduction (P greater than 0.05) was observed with ADP. Paracetamol had no effect on bleeding time or platelet aggregation. Plasma aspirin esterase activity ranged from 0.26-0.6 mumol/ml/min. A significant negative correlation (R = -0.55, P less than 0.001) was observed between percentage increase in bleeding time (24 h) and plasma aspirin esterase activity. Further significant correlations were observed between plasma aspirin esterase activity and change in platelet aggregation with collagen at 1 h (R = 0.68, P less than 0.001), 6 h (R = -0.73, P less than 0.001) and 24 h (R = -0.67, P less than 0.001). These results suggest that it might be possible to predict an individual's haemostatic response to aspirin from knowledge of their plasma aspirin esterase activity.

journal_name

Eur J Clin Pharmacol

journal_title

European journal of clinical pharmacology

authors

Seymour RA,Williams FM,Oxley A,Ward A,Fearns M,Brighan K,Rawlins MD,Jones PM

doi

10.1007/BF00543486

subject

Has Abstract

pub_date

1984-01-01 00:00:00

pages

567-71

issue

5

eissn

0031-6970

issn

1432-1041

journal_volume

26

pub_type

临床试验,杂志文章,随机对照试验

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