An operating-room review must distinguish the expected risk from the disputed act.

The preoperative sequence can include the indication, alternatives, imaging, laboratory results, clearance, medication changes, site marking, equipment planning, consent discussion, and anticipated risks. The intraoperative sequence may include room and staff logs, anesthesia record, vital and medication data, device settings, fluoroscopy or other imaging, implant labels, pathology, sponge and instrument counts, specimen handling, blood loss, complications, consultations, and transfers.

Postoperative evidence includes recovery monitoring, neurological or vascular checks, laboratory trends, imaging, pain and medication management, discharge criteria, messages, readmission, corrective treatment, and later function.

A retained object, wrong procedure, injury, infection, anesthesia event, equipment failure, positioning injury, or delayed recognition presents a distinct technical question. The event should be defined without assuming that a recognized complication was unavoidable or that an unusual outcome necessarily speaks for itself under Oklahoma law.

Potential sources include the scheduling system, preference card, preoperative checklist, site-verification material, consent forms, room log, staffing schedule, anesthesia information system, electronic medication record, counts, implant and device logs, serial and lot numbers, machine downloads, intraoperative images, video where it exists, pathology custody, sterilization data, maintenance records, vendor representative information, postoperative notes, incident reports, and audit history. Access, privilege, discoverability, and retention must be analyzed source by source.

When a device, implant, instrument, or removed object may matter, preservation should protect identity and condition. Informal handling, repair, return, disposal, destructive testing, or downloading can change evidence. The plan should identify who owns the item, who has custody, whether patient care requires continued use, what manufacturer or hospital protocols apply, and which expert can inspect it safely.

The standard-of-care review should identify the operative specialty, procedure, approach, anatomy, urgency, setting, resources, team roles, and information available at the time. Separate reviewers may be needed for surgery, anesthesiology, nursing, radiology, pathology, infection, device engineering, rehabilitation, or another specialty. Internal checklists and federal conditions can help explain a process but do not supply a universal civil standard.

Causation must distinguish preexisting disease, the intended effect of surgery, recognized complications, the disputed technique, postoperative events, corrective treatment, and alternative causes. Imaging, examination, pathology, device condition, anatomy, and the timing of symptoms may matter. A reviewer should state the medical basis for linking the alleged departure to the additional injury rather than infer cause from sequence alone.

Legal review should confirm the facility license, physician and group identities, employment and agency evidence, anesthesia contract, nursing and technician employer, device manufacturer and seller, public or federal status, Tribal relationships, insurance, and venue. Direct facility theories such as credentialing, staffing, equipment, policy, or supervision need their own facts and privilege analysis.

The claim calendar should address the injury and discovery dates, limitations, any repose issue, minority or incapacity, public or federal notice or presentment, tribal procedure, product timing, preservation, corrective-treatment records, survival or wrongful death, and amendment or relation back. The existence of a regulatory investigation or patient complaint does not stop a civil period.