• Journal of anesthesia · Dec 2023

    Randomized Controlled Trial

    Effect of height versus height/weight-based spinal bupivacaine on maternal hemodynamics for elective cesarean in short stature patients: a randomized clinical trial.

    • Asish Subedi, Parineeta Thapa, Rajesh Prajapati, and Schyns-van den BergAlexandra M J VAMJVAlbert Schweitzer Hospital, Dordrecht, The Netherlands.Leiden University Medical Centre, Leiden, The Netherlands..
    • Department of Anesthesiology and Critical Care, BP Koirala Institute of Health Sciences, Dharan, Nepal. asishsubedi19@gmail.com.
    • J Anesth. 2023 Dec 1; 37 (6): 905913905-913.

    PurposeDoses of spinal bupivacaine adjusted to patient height or height/weight have been shown to provide hemodynamic stability during cesarean section. However, their effects in short stature parturients are unknown.MethodsIn this double-blind, randomized clinical trial, we randomly assigned short parturients (height < 150 cm) undergoing elective cesarean section, to receive doses of intrathecal hyperbaric bupivacaine either height or height/weight-adjusted, in a 1:1 ratio. The primary outcome was post-spinal hypotension (defined as systolic blood pressure [SBP] < 90% of baseline between spinal administration and delivery of the baby). Secondary outcomes included severe post-spinal hypotension (SBP < 80% of baseline), post-delivery hypotension (SBP < 90% and < 80% of baseline), intraoperative bradycardia, nausea and vomiting, shivering, rescue analgesic needed, and spinal block characteristics.ResultsA total of 112 patients underwent randomization. Post-spinal hypotension (SBP < 90% of baseline) occurred in 52% of the patients in the height/weight group and in 55% in the height group (difference - 3.5%: 95% confidence interval [CI] - 22 to 14.8, P = 0.705). There was no significant difference between the two groups in the occurrences of post-spinal severe hypotension (SBP < 80% of baseline), post-delivery hypotension, and spinal block characteristics. Six patients (11%) in the height/weight group needed intraoperative rescue analgesic compared to none in the height group (P = 0.027).ConclusionWe found that height-based dosing in short parturients provides the optimal trade-off between intraoperative hemodynamic instability and provision of pain-free anesthesia.Trial Registrationclinicaltrial.gov-NCT04082676. https://clinicaltrials.gov/ct2/show/NCT04082676 .© 2023. The Author(s) under exclusive licence to Japanese Society of Anesthesiologists.

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