British Journal of Anaesthesia, Vol 84, Issue 3 394-395, Copyright © 2000 by Oxford University Press
C Baillard, G Gehan, J Reboul-Marty, P Larmignat, CM Samama and M Cupa
We have investigated residual block after anaesthesia which included the
use of the neuromuscular blocking agent vecuronium but no
anticholinesterase, in 568 consecutive patients on admission to the
recovery room. The ulnar nerve was stimulated submaximally using TOF
stimulation (30 mA). Postoperative residual curarization was defined as a
TOF ratio < 0.7. Of the 568 patients, 239 (42%) had a TOF < 0.7 in
the recovery room. These patients had received a larger cumulative dose of
vecuronium than patients who had full recovery (mean 7.7 (SD 3.6) mg vs 6.2
(2.7) mg; P < 0.05) and a shorter time had elapsed since the last
vecuronium dose (117 (70) min vs 131 (80) min; P < 0.05). Of 435
patients whose trachea was extubated, 145 (33%) exhibited inadequate
recovery from neuromuscular block. Six of these had one or no response to
TOF stimulation and were reintubated. In the remaining 139 patients,
neuromuscular block was successfully antagonized. Only 20 patients (3.5%)
remembered TOF stimulation when questioned 2 h later in the recovery room,
and discomfort associated with it was assessed using a visual analogue
scale before discharge. We conclude that it is necessary to antagonize
residual block produced by vecuronium.
ARTICLES
Residual curarization in the recovery room after vecuronium
Department of Anaesthesiology, University Hospital, Bobigny, France.
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