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Received from the Department of Anesthesiology, Medical College of Ohio, Toledo, Ohio.
Abstract
Anesthesiologists are being asked more and more often to administer anesthesia to patients who are having high-energy radiation from a linear accelerator applied to a tumor site through an open surgical wound. Because of the nature of the radiologic equipment, intraoperative radiation therapy must be accomplished in the radiology suite and requires that only the patient be exposed to the active beam. Thus remote monitoring of a relaxed, mechanically ventilated subject with a carefully stabilized cardiovascular sys- tem is mandatory. These requirements provoke sufficient anxiety on the part of many anesthesiologists to cause them to avoid participation in such a procedure. We report here a simple refinement of cardiorespiratory monitoring in which the output of an esophageal stethoscope is converted to an electrical signal that is transmitted via a cable to a loudspeaker at the remote control point.
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