Abstract
Objective
To investigate the infusion requirements and recovery characteristics of cisatracurium compared with atracurium when both are administered by prolonged continuous infusion.
Design
A prospective, randomised, single-blind study.
Settings
The Intensive Care Unit of the Manchester Royal Infirmary.
Patients
20 patients requiring a continuous infusion of a neuromuscular blocking agent to facilitate mechanical ventilation. 12 patients received cisatracurium and 8 received atracurium.
Interventions
Cisatracurium or atracurium was administered by continuous infusion for a minimum of 24h. The level of neuromuscular blockade was measured by recording the train-of-four responses using acceleromyography, the aim being to maintain 1–2 twitch responses of the adductor pollicis. At the end of the infusion period, the train-of-four was recorded until the ratio was greater than 0.7.
Measurements and results
The mean infusion rate of cisatracurium was 0.23 mgkg−1 h−1, compared to 0.62 mgkg−1 h−1. No time-related increase in infusion requirements was seen for either drug. The mean recovery time to a train-of-four ratio greater than 0.7 was the same (46 min). There was no correlation between recovery time and age, duration of infusion or mean infusion rate.
Conclusions
Cisatracurium provides a satisfactory level of neuromuscular blockade in adult ICU patients at approximately one-third the infusion rate of atracurium and with a similar recovery time.
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This work was completed with the support of a grant from the Wellcome Foundation ple
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Pearson, A.J., Harper, N.J.N. & Pollard, B.J. The infusion requirements and recovery characteristics of cisatracurium or atracurium in intensive care patients. Intensive Care Med 22, 694–698 (1996). https://doi.org/10.1007/BF01709749
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DOI: https://doi.org/10.1007/BF01709749