The names Brechner and Bethune are associated with which of the following devices?: (A) Precordial Doppler, (B) Transesophageal echocardiography, (C) Plethysmography, (D) End tidal capnography
Answer is D. Ans. d. End tidal capnography (Ref: Bethune, R. W. M., and Brechner, V. L. (1968). Detection of venous air embolism by carbon dioxide monitoring. Anesthesiology, 29, 178)Brechner and Bethune are associated with end-tidal capnography.