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Esmolol prevents movement and attenuates the BIS response to orotracheal intubation.

Abstract：

BACKGROUND:Beta-adrenergic agonists enhance behavioural and electroencephalographic arousal reactions. We explored whether adding esmolol, a short-acting beta(1)-adrenoceptor antagonist, to propofol anaesthesia modified the bispectral index (BIS) during induction of anaesthesia and orotracheal intubation. METHODS:Fifty patients were randomly allocated, in a double-blind fashion, to receive esmolol 1 mg kg(-1) followed by 250 micro g kg(-1) min(-1) or saline (control). Esmolol or saline was started 6 min after a target-controlled infusion (TCI) of propofol (effect-site concentration 4 micro g ml(-1)). After loss of consciousness, and before administration of vecuronium 0.1 mg kg(-1), a tourniquet was applied to one arm and inflated to 150 mm Hg greater than systolic pressure. Eleven minutes after the TCI began, the trachea was intubated; gross movement within the first min after orotracheal intubation was recorded. BIS was recorded at 10-s intervals. Mean arterial pressure (MAP) and heart rate were measured non-invasively every min. RESULTS:There were no intergroup differences in BIS, heart rate or MAP before laryngoscopy. BIS increased significantly after orotracheal intubation (compared with the pre-laryngoscopy values) in the control group only, with a maximum increase of 40 (SD 18)% vs 8 (11)% in the esmolol group (P<0.01). Maximum changes in heart rate [45 (19)% vs 23 (14)%] and MAP [62 (24)% vs 45 (23)%] with orotracheal intubation were also significantly greater in the control group than in the esmolol group. More patients in the control than in the esmolol group moved after orotracheal intubation (23 vs 12, P<0.01). CONCLUSION:Esmolol not only attenuated haemodynamic and somatic responses to laryngoscopy and orotracheal intubation, but also prevented BIS arousal reactions in patients anaesthetized with propofol.

journal_name

Br J Anaesth

journal_title

British journal of anaesthesia

authors

Menigaux C,Guignard B,Adam F,Sessler DI,Joly V,Chauvin M

doi

10.1093/bja/aef275

subject

Has Abstract

pub_date

2002-12-01 00:00:00

pages

857-62

issue

6

eissn

0007-0912

issn

1471-6771

pii

S0007-0912(17)36992-1

journal_volume

89

pub_type

临床试验,杂志文章,随机对照试验

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