A physician who admitted a patient to a hospital or other care unit that is the context of this service.

In a typical anesthesia setting an anesthesiologist or anesthesia resident in charge of the anesthesia and life support, but only a witness to the surgical procedure itself. To clarify responsibilities anesthesia should always be represented as a separate service related to the surgery.

In a typical anesthesia setting the nurse principally assisting the anesthesiologist during the critical periods.

A physician who is primarily responsible for a patient during the hospitalization, which is the context of the service.

A physician who discharged a patient from a hospital or other care unit that is the context of this service.

In a typical surgery setting the assistant facing the primary surgeon. The first assistant performs parts of the operation and assists in others (e.g., incision, approach, electrocuting, ligatures, sutures).

A person (usually female) helping a woman deliver a baby. Responsibilities vary locally, ranging from a mere optional assistant to a full required participant, responsible for (normal) births and pre- and post-natal care for both mother and baby.

In a typical surgery setting the non-sterile nurse handles material supply from the stock, forwards specimen to pathology, and helps with other non-sterile tasks (e.g., phone calls, etc.).

The healthcare provider that holds primary responsibility for the overall care of a patient.

In a typical surgery setting the primary performing surgeon.

A physician who made rounds on a patient in a hospital or other care center.

In a typical surgery setting the assistant who primarily holds the hooks.

In a typical surgery setting the nurse in charge of the instrumentation.

In a typical surgery setting there is rarely a third assistant (e.g., in some Hip operations the third assistant postures the affected leg).