• Matias Vested, Mona Tarpgaard, Kirsten Eriksen, and Lars S Rasmussen.
• Department of Anaesthesia, Centre of Head and Orthopedics, Rigshospitalet, University of Copenhagen, Denmark.
• Acta Anaesthesiol Scand. 2020 Feb 1; 64 (2): 168-172.

BackgroundThe aim of this quality assurance study was to determine the proportion of patients with residual block (train-of-four (TOF) ratio <0.9) upon conclusion of surgery after a bolus of cisatracurium 0.1 mg/kg. It was considered good quality if less than 10% of the study population had residual block upon conclusion of surgery.MethodsA total of 40 patients ≤3 years of age scheduled for cleft lip and palate repair were consecutively enrolled. They received general anaesthesia with either sevoflurane and fentanyl (n = 20) or propofol and remifentanil (n = 20). TOF stimulation using acceleromyography was applied on the tibial nerve. Cisatracurium 0.1 mg/kg was administered to facilitate tracheal intubation.ResultsThree patients (8%; 95% CI: 1.7-21) had a TOF ratio <0.9 at conclusion of surgery, all three receiving sevoflurane. In the sevoflurane group, this corresponded to 16% (95% CI: 3.3-40) of the patients. Mean duration of action of cisatracurium 0.1 mg/kg was 119 minutes (SD 40) with sevoflurane and 73 minutes (SD 29) during total intravenous anaesthesia (P < .001). Onset time of cisatracurium 0.1 mg/kg was 166 seconds (SD 37) with sevoflurane and 199 seconds (SD 60) during total intravenous anaesthesia.ConclusionWe found that 8% of the children had residual neuromuscular blockade (TOF ratio <0.9) after administration of a single bolus of cisatracurium 0.1 mg/kg but we cannot exclude that the true proportion is around 20%.© 2019 The Acta Anaesthesiologica Scandinavica Foundation. Published by John Wiley & Sons Ltd.

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