Final answer:
A sphygmomanometer is used in the operating room to determine the patency of an arterial anastomosis. It consists of an inflatable cuff and a measuring device. The clinician listens for Korotkoff sounds with a stethoscope to assess blood flow through the anastomosis.
Step-by-step explanation:
The device used in the operating room to determine the patency of an arterial anastomosis is called a sphygmomanometer. It is a device that consists of an inflatable cuff and a measuring device. The cuff is wrapped around the patient's arm, and when inflated, it temporarily cuts off blood flow. As the pressure in the cuff is gradually released, the clinician listens for Korotkoff sounds with a stethoscope. These sounds indicate the presence and quality of blood flow through the anastomosis.