Patient care procedures performed during the operation that are ancillary to the actual surgery. May include monitoring, fluid therapy, medication, transfusion, anesthesia, radiography, and/or laboratory testing.

occurring, carried out, or encountered in the course of surgery.

radiation: A type of external radiation used to deliver a large dose of radiation therapy to the tumor bed and surrounding tissue at the time of surgery.

The period of time during a surgical procedure. (see Preoperative, Postoperative and Perioperative)