The nurse connected the patient to the monitor, adjusted the oxygen supply, and hung a saline drip for resuscitation before walking away. Now, only the anesthesiologist was left to proceed with the operation.
The anesthesiologist needed to administer anesthesia to the patient. For surgeries like this one, specifically noted as an anal surgery, general anesthesia was usually not required. Whenever possible, surgeries would avoid general anesthesia, which carries a higher risk and is more expensive; both of which are reasons why neither anesthesiologists nor surgeons prefer it, and not something the general public needs to worry about.
Her supervising physician had previously instructed her to perform spinal anesthesia on the patient, which was a type of neuraxial block.
