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Large bolus dose vs. continuous infusion of cisatracurium during hypothermic cardiopulmonary bypass surgery

Published online by Cambridge University Press:  13 April 2005

G. Cammu ,
V. Boussemaere ,
L. Foubert ,
J. Hendrickx ,
J. Coddens  and
T. Deloof
G. Cammu
Affiliation:
O.L.V. Clinic, Department of Anaesthesia and Critical Care Medicine, Aalst, Belgium
V. Boussemaere
Affiliation:
O.L.V. Clinic, Department of Anaesthesia and Critical Care Medicine, Aalst, Belgium
L. Foubert
Affiliation:
O.L.V. Clinic, Department of Anaesthesia and Critical Care Medicine, Aalst, Belgium
J. Hendrickx
Affiliation:
O.L.V. Clinic, Department of Anaesthesia and Critical Care Medicine, Aalst, Belgium
J. Coddens
Affiliation:
O.L.V. Clinic, Department of Anaesthesia and Critical Care Medicine, Aalst, Belgium
T. Deloof
Affiliation:
O.L.V. Clinic, Department of Anaesthesia and Critical Care Medicine, Aalst, Belgium
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Summary

Background and objective: We investigated whether a high bolus dose of cisatracurium (8× ED95) given at induction can provide muscle relaxation for the major part of a cardiac procedure with hypothermic cardiopulmonary bypass, avoid important postoperative residual curarization and cause no waste of product.

Methods: Twenty patients were randomly assigned either to Group 1 (n = 10) or Group 2 (n = 10). Those in Group 1 were given cisatracurium in a high bolus dose (0.4 mg kg−1). Those in Group 2 received cisatracurium 0.1mg kg−1 at induction followed after 30 min by a continuous infusion of cisatracurium. As an escape medication in case of patient movement, a bolus dose of cisatracurium 0.03 mg kg−1 was given.

Results: In Group 1 (large cisatracurium bolus dose), the clinical duration of effect (until T1/T0 = 25%) was 110 min. Six of 10 patients in Group 1 required additional boluses of cisatracurium intraoperatively. Four of these six had received an additional bolus near the end of surgery and had a train-of-four (TOF) ratio = 0 at the end. The other four patients in Group 1 had a final TOF ratio >0.9. In Group 2 (continuous cisatracurium infusion), only two patients had a TOF ratio >0.9 at the end of surgery, no patient moved and none received additional boluses. The total amount of cisatracurium used in the bolus and infusion Groups was 34.5 ± 7.8 and 21.3 ± 5.7 mg, respectively (P = 0.0004).

Conclusions: For continued neuromuscular block during hypothermic cardiac surgery, a high bolus dose of cisatracurium appears to be safe, although it is not an alternative to a continuous infusion, as its neuromuscular blockade does not cover the intraoperative period and a high incidence of movements occurs. In the patients who received a high bolus dose of cisatracurium, postoperative residual curarization appeared after additional boluses had been given. The consumption of cisatracurium by high bolus was significantly greater than with continuous infusion.

Keywords

NEUROMUSCULAR BLOCKING AGENTS, cisatracuriumCARDIOPULMONARY BYPASSHYPOTHERMIA
Type
Original Article
Information
European Journal of Anaesthesiology , Volume 22 , Issue 1 , January 2005 , pp. 25 - 29
Copyright
© 2005 European Society of Anaesthesiology

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