[Anaphylactic shock induced by suxamethonium]

Area of Science:

• Anesthesiology
• Clinical Immunology
• Pharmacology

Context:

• Anaphylactic shock is a severe, life-threatening allergic reaction.
• Suxamethonium is a commonly used muscle relaxant in anesthesia.
• Previous studies have indicated potential risks associated with suxamethonium, but data on specific causative factors and diagnostic approaches remain critical.

Purpose:

• To investigate the incidence and characteristics of anaphylactic shock caused by suxamethonium in a specific geographic region and time period.
• To identify significant contributing factors and predominant clinical symptoms associated with suxamethonium-induced anaphylaxis.
• To evaluate the diagnostic accuracy of specific immunoallergic tests for confirming suxamethonium allergy.

Summary:

• This study analyzed 18 cases of anaphylactic shock attributed to suxamethonium (succinyl iodide or succinyl chloride) in Eastern France (1972-1980).
• Key contributing factors included prior drug allergy, spasmophilia, and histamine hypersensitivity. Cardiovascular collapse and mucocutaneous symptoms were prevalent, with 5 cases experiencing cardiac arrest.
• Diagnosis relied on validated immunoallergic tests, including intradermal reactions, Prausnitz-Küstner tests, and basophil degranulation tests, with confirmation required for single positive results.

Impact:

• The findings underscore the necessity of avoiding suxamethonium in patients diagnosed with genuine anaphylaxis.
• Highlights the importance of allergy cards for patients with confirmed suxamethonium hypersensitivity.
• Provides valuable data for anesthesiologists and immunologists regarding the recognition, diagnosis, and management of suxamethonium-induced anaphylaxis.