Perioperative allergy: clinical manifestations

Area of Science:

• Anesthesiology
• Clinical Pharmacology
• Immunology

Background:

• Adverse drug reactions (ADRs) are typically dose-dependent and expected.
• Anaphylactic and anaphylactoid reactions are unexpected, dose-independent ADRs that can occur upon first exposure to anesthetic drugs.
• Perioperative anaphylaxis is a rapid, severe, and potentially lethal condition.

Purpose of the Study:

• To highlight the challenges in diagnosing anaphylaxis and anaphylactoid reactions in the perioperative setting.
• To emphasize the importance of timing and clinical presentation in identifying causative agents.
• To underscore the necessity of considering anaphylaxis in the differential diagnosis of perioperative adverse events.

Main Methods:

• Review of clinical characteristics of perioperative anaphylaxis.
• Analysis of the temporal relationship between drug administration and reaction onset.
• Correlation of reaction patterns with specific drug classes (antibiotics, neuromuscular agents, NSAIDs).

Main Results:

• Anaphylactic and anaphylactoid reactions are unpredictable and can occur even with initial drug exposure.
• Diagnosis is presumptive, with precise drug identification complicated by co-administered medications.
• Reactions often manifest as cutaneous symptoms, predominantly during induction and recovery phases.
• Specific drug classes are associated with distinct timing patterns (e.g., antibiotics in induction, NSAIDs in recovery).

Conclusions:

• Perioperative anaphylaxis requires prompt recognition and consideration in differential diagnoses.
• Understanding the timing of reactions relative to drug administration is crucial for identifying the responsible agent.
• Early and accurate diagnosis is essential for patient safety and effective management of anaphylaxis during anesthesia.