This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thromboembolism and Fat Embolism Syndrome, Subject name: Medicine
[{'content': 'Air embolism is best diagnosed by? \nSelect and explain. \nA. | End tidal CO2, B. | End tidal N2, C. Doppler study, D. Ultrasound', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Transesophageal echocardiography (TEE):- has the highest sensitivity for detecting the presence of air in the right ventricular outflow tract or major pulmonary veins. - It can detect as little as 0.02 mL/kg of air administered by bolus injection. It also has the added advantage of identifying Paradoxical Air Embolism (PAE), and Doppler allows audible detection of venous air embolism (VAE). Overall highest sensitivity :- T.E.E > Doppler > E.T N2> E.T CO2', 'role': 'assistant'}]