Adverse reactions to neuromuscular blocking agents

Area of Science:

• Anesthesiology
• Immunology
• Pharmacology

Background:

• Neuromuscular blocking agents (NMBAs) are frequently implicated in severe adverse reactions during anesthesia.
• Hypersensitivity reactions can be IgE-mediated or due to direct histamine release.
• NMBAs account for 50-70% of anaphylaxis cases during anesthesia.

Purpose of the Study:

• To emphasize the importance of investigating suspected anaphylactic reactions to NMBAs.
• To highlight the need for comprehensive NMBA testing due to cross-reactivity.
• To guide future anesthetic management in patients with NMBA hypersensitivity.

Main Methods:

• Investigating suspected anaphylaxis through combined perioperative and postoperative testing.
• Testing all available NMBAs to identify specific agents responsible for reactions.
• Distinguishing anaphylactic reactions from other NMBA adverse effects like succinylcholine-induced myotoxicity.

Main Results:

• NMBAs are the leading cause of anaphylaxis in anesthesia, occurring in 1 in 10,000 to 20,000 cases.
• Cross-reactivity among NMBAs is common, necessitating broad testing.
• Characteristic clinical symptoms aid in differentiating anaphylaxis from other adverse effects.

Conclusions:

• Thorough investigation of all NMBAs is essential for patients experiencing suspected anaphylaxis during anesthesia.
• Testing provides critical information for safe future anesthetic choices.
• Systematic preoperative screening for NMBA hypersensitivity is not currently recommended for the general population.