Monitored Anesthesia Care and Soft-Tissue Infiltration with Local Anesthesia (MAC-STILA): An Anesthetic Option for High Risk Patients with Hip Fractures.

OBJECTIVES To examine the feasibility of a novel anesthetic option for hip fracture fixation with short cephalomedullary nails. DESIGN Retrospective cohort study. SETTING An urban, academic level 1 trauma center, a tertiary care academic medical center, and an orthopedic specialty hospitalPatients/Participants: 20 recent and 40 risk-matched (1:1:1 by anesthesia type) historical hip fracture patients. INTERVENTION All patients with an OTA 31.A1-3 IT hip fracture presenting from October 1st 2019 - March 31st, 2020 treated with a short cephalomedullary nail (CMN) underwent a new intraoperative anesthesia protocol using monitored anesthesia care (MAC) and soft-tissue infiltration with local anesthesia (STILA). MAIN OUTCOME MEASUREMENTS Intraoperative measures, postoperative pain scores, narcotic and acetaminophen use, hospital quality measures, and inpatient cost. RESULTS A total of 60 patients (20 each: MAC, general, spinal) were identified. There were differences among the groups regarding mean minimum and maximum intraoperative heart rate with MAC-STILA protocol demonstrating the best maintenance of normal heart rate parameters (60-100 bpm). For the first 3 hours post-operatively, MAC-STILA patients reported consistently lower pain scores (VAS 1). Through 48 hours postoperatively, MAC-STILA narcotic usage was similar to that of the spinal cohort and approximately five times less than the general cohort. There were no differences in procedural time, length of stay, minor or major complications, inpatient and 30-day mortality, or 30-day readmissions, or post-operative ambulatory distance. There was no difference in inpatient cost among cohorts. CONCLUSIONS This feasibility study demonstrates safety for the MAC-STILA protocol with comparison to spinal and general anesthesia. The MAC-STILA protocol is a viable option for treatment of OTA 13.A1-3 IT fractures with a short CMN, and may be the preferred method for patients with severe medical co-morbidities or relative contraindications to general and/or spinal anesthesia. LEVEL OF EVIDENCE Therapeutic Level III. See Instructions for Authors for a complete description of Levels of Evidence.