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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Rise in end-tidal CO2 during thyroid surgery can be due to all except –
assistant
The correct answer is  Anaphylaxis is generally associated with hypotension, shock, and hypoperfusion of lungs and results in decreased End Tidal CO2 measurements.
Thyroid storm (hypermetabolic state), malignant hyperthermia and neuroleptic malignant syndrome can cause rise in ETCO2.