<prompt> Air embolism is best diagnosed by?End tidal CO2End tidal N2Doppler studyUltrasound  <response>: 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 mLkg 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 