Sugammadex-Induced Clenching During Neuromuscular Blockade Reversal

Summary

Study Objective: This study aims to evaluate the incidence, severity, and risk factors of sugammadex-induced mouth clenching during neuromuscular blockade (NMB) reversal in adult surgical patients. Study Design: This prospective, randomized, double-blind, controlled clinical trial enrolls adult patients (ASA physical status I-II, aged 19-70 years) undergoing elective surgery under general anesthesia with rocuronium. Patients will be randomized into four groups to receive either sugammadex at doses of 1 mg/kg, 2 mg/kg, or 4 mg/kg, or a combination of pyridostigmine and glycopyrrolate. Primary Outcome: The primary outcome is the incidence of clenching within 10 minutes after NMB reversal, assessed by clinical observation, masseter EMG, and airway pressure changes, using a novel five-grade severity scale. Secondary Outcomes: Secondary outcomes include the severity of clenching, time to TOF ratio ≥0.9, BIS values at clenching onset, complications, and identification of risk factors such as dose, sex, BIS, age, BMI, and rocuronium dose. Significance: This study seeks to improve perioperative safety by identifying modifiable risk factors and informing dose adjustments or alternative reversal strategies to prevent sugammadex-induced clenching, particularly in high-risk populations.

Timeline

Start

2025-07-01

Primary completion

2026-09-20

Completion

2026-10-14

Publications

• Background Hristovska AM, Duch P, Allingstrup M, Afshari A. Efficacy and safety of sugammadex versus neostigmine in reversing neuromuscular blockade in adults. Cochrane Database Syst Rev. 2017 Aug 14;8(8):CD012763. doi: 10.1002/14651858.CD012763.
• Background Naguib M. Sugammadex: another milestone in clinical neuromuscular pharmacology. Anesth Analg. 2007 Mar;104(3):575-81. doi: 10.1213/01.ane.0000244594.63318.fc.
• Background Lee HY, Jung KT. Advantages and pitfalls of clinical application of sugammadex. Anesth Pain Med (Seoul). 2020 Jul 31;15(3):259-268. doi: 10.17085/apm.19099.
• Background Lee S, Chung W. Sugammadex for our little ones: a brief narrative review. Anesth Pain Med (Seoul). 2024 Oct;19(4):269-279. doi: 10.17085/apm.24092. Epub 2024 Oct 31.
• Background Tsur A, Kalansky A. Hypersensitivity associated with sugammadex administration: a systematic review. Anaesthesia. 2014 Nov;69(11):1251-7. doi: 10.1111/anae.12736. Epub 2014 May 22.

Drugs

Indications