Operating Room Team Familiarity and Perioperative Outcomes in Non-Cardiac Surgery

This retrospective observational cohort study investigates the association between operating room team familiarity and perioperative outcomes in non-cardiac surgery.

The operating room team consists of surgeons, anesthesiologists, and operating room nurses. Operating room team familiarity is quantified using the Intraoperative Familiarity Score (IFS), which reflects the historical collaboration frequency among team members involved in surgical procedures.

The IFS is calculated based on the historical frequency of collaboration among all possible pairs of operating room team members, including surgeons, anesthesiologists, and operating room nurses. For each surgical procedure, previous working relationships among participating team members are assessed using historical surgical records. The IFS represents the overall familiarity level of the operating room team, with higher IFS values indicating greater familiarity among team members.

The primary objective of this study is to evaluate whether operating room team familiarity is associated with operating room efficiency. Operating room efficiency will be assessed using workflow time intervals, including pre-anesthesia preparation time, anesthesia induction time, and surgical duration.

Secondary objectives are to evaluate the association between operating room team familiarity and perioperative patient safety outcomes and healthcare utilization outcomes. These outcomes include intraoperative blood loss, postoperative intensive care unit admission, duration of intensive care unit stay, unplanned secondary surgery, unplanned hospital readmission, in-hospital mortality, length of hospital stay, and total hospitalization cost.

Additional analyses will evaluate whether operating room team composition characteristics, including team size and personnel changes during surgical procedures, influence perioperative outcomes or modify the association between team familiarity and clinical outcomes.

• Estimated Intraoperative Blood Loss [Срок оценки: During the index surgical procedure, assessed up to 24 hours]
• Duration of Post-Anesthesia Care Unit (PACU) Stay [Срок оценки: From transfer from the operating room to the PACU until transfer from the PACU to the ward after the index surgery, assessed up to 12 hours]
• Postoperative ICU Admission [Срок оценки: From completion of the index surgical procedure until hospital discharge, assessed up to 90 days]
• Duration of ICU Stay [Срок оценки: From postoperative ICU admission until ICU discharge or transfer to the ward during the index hospitalization (recorded as 0 days if no ICU admission), assessed up to 90 days]
• Unplanned Secondary Surgery Within 31 Days After Surgery [Срок оценки: From the day of the index surgical procedure, assessed up to 31 days]
• In-Hospital Mortality [Срок оценки: From the day of the index surgical procedure until hospital discharge, assessed up to 90 days]
• Unplanned Hospital Readmission Within 31 Days After Surgery [Срок оценки: From the day of the index surgical procedure, assessed up to 31 days]
• Length of Hospital Stay [Срок оценки: From hospital admission until hospital discharge for the index surgical procedure, assessed up to 90 days]
• Total Hospitalization Cost [Срок оценки: From hospital admission until hospital discharge for the index surgical procedure, assessed up to 90 days]