Opiate Use After Endoscopic Endonasal Transsphenoidal Surgery

Background The literature on opiate use after endoscopic endonasal transsphenoidal surgery (EETS) is limited. Objective To determine the risk factors for higher opiate use following EETS and the quantity of opiates used after discharge. Methods A retrospective review of 144 patients undergoing EETS from July 2018 to July 2020 was conducted. Patient, tumor, and surgical factors were documented. Pain scores and medications used on postoperative days (POD) 0 and 1, and discharge prescriptions, were recorded. Opiate use was quantified using morphine milligram equivalents (MME) dose. Multiple linear regression determined risk factors independently associated with POD0 to 1 opiate use. Results On POD 0 to 1, mean pain score was 4.9/10 (standard deviation [SD] ± 2.0). Mean acetaminophen use was 3.4 tablets (SD ± 1.6; 650 mg per tablet). Mean opiate use was 35.6 MME (SD ± 36.3), equivalent to 4.7 tablets (SD ± 4.8) of oxycodone 5 mg. Multiple linear regression showed that current smokers required an additional 37.1 MME (P = .011), and patients with grade 3 intraoperative cerebrospinal fluid leaks required an additional 36.7 MME (P = .046) on POD0 to 1. On discharge, mean opiate prescription was 117.7 MME (SD ± 102.1), equivalent to 15.7 tablets (SD ± 13.6) of oxycodone 5 mg. Thirty-nine patients (27.1%) did not require prescriptions. Only 10 patients (6.9%) required opiate refill(s) within 30 days after surgery. Conclusion Patients undergoing EETS have higher opiate needs compared to those undergoing endoscopic sinus surgery, although the overall requirements are still considered low. Independent risk factors associated with higher opiate use in the immediate postoperative period included current smokers and grade 3 intraoperative cerebrospinal fluid leaks.