| A | B |
| Preoperative Phase | Time from when decision for surgical intervention is made to when patient is transferred to OR table |
| Intraoperative Phase | Time from when the patient is transferred to the operating room table to when patient is admitted to postanesthesia care unit |
| Postoperative Phase | Time that begins with the admission of the patient to the postanesthesia care unit and ends after follow-up evaluation in the clinical setting or home |
| Perioperative Period | Time that constitute the surgical experience, include the preoperative, intraoperative, postoperative phases |
| Emergency | Life saving surgery that must be performed immediately |
| Diagnostic | Procedure determination of the presence and/or extent of pathology |
| Ablative | Surgery done to remove a diseased tissue, organ, or extremity |
| Constructive | Surgery performed to correct a congenital anomaly by building tissue that was absent at birth |
| Reconstructive | Rebuilding a tissue or organ that was present at birth but has been damaged |
| Palliative | Surgery performed to alleviate symptoms without a cure |