A pharmacokinetic study of midazolam in paediatric patients undergoing cardiac surgery.

Abstract:

:Midazolam 0.3 mg kg-1 was given as a single dose to three groups of children undergoing cardiac surgery to determine its pharmacokinetic profile in this situation. The first group, undergoing closed heart surgery, received the midazolam during the operation. The other groups underwent cardiopulmonary bypass (CPB) with and without complete circulatory arrest. Mean clearance was 512 ml kg-1 h-1 and mean elimination half-lives were 3.3 h following CPB, with a tendency to a higher clearance in those children who had not undergone bypass. In a subsequent part of the study, 10 children received an infusion of midazolam 0.05 mg kg-1 h-1, in combination with intermittent doses of morphine, in the postoperative period. Mean plasma midazolam concentrations consistent with adequate sedation were 80-100 ng ml-1 during the infusion. One child who had not undergone CPB had very low plasma concentrations of midazolam with the same rate of infusion, consistent with the tendency for higher clearance in this group in the bolus pharmacokinetic study.

journal_name

Br J Anaesth

authors

Mathews HM,Carson IW,Lyons SM,Orr IA,Collier PS,Howard PJ,Dundee JW

doi

10.1093/bja/61.3.302

subject

Has Abstract

pub_date

1988-09-01 00:00:00

pages

302-7

issue

3

eissn

0007-0912

issn

1471-6771

pii

S0007-0912(17)49309-3

journal_volume

61

pub_type

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