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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
5 year old child going for sitting craniotomy, while positioning in O.T. developed end tidal CO2- Zero mmHg, PO2- 80 mm Hg implies that :
assistant
The correct answer is  Ans. is 'a' i.e. Venous Air embolismThe cranial sinuses have negative air pressure.So, it is possible that if the pt. is in the wrong position while operation, the sinuses may suck some air d/t their negative pressure which can cause a venous embolism.The given value for the gases can occur only in Venous air embolism.