Opioid Use After Simple Arthroscopic Knee Surgery.

Background: Evidence-based prescribing guidelines are lacking for opioids after most orthopaedic surgical procedures.

Hypothesis: Opioids are commonly overprescribed after simple knee arthroscopy.

Study Design: Case-control study; Level of evidence, 3.

Methods: A cohort of 174 patients who underwent simple arthroscopic knee surgery were prospectively evaluated using data from the Outcome Management and Evaluation database. All patients received 10 combined hydrocodone 5 mg and acetaminophen 325 mg pills postoperatively. Patients were excluded if they (1) had revision surgery, (2) had concomitant complex surgery (eg, ligament surgery, osteotomy), (3) had current opioid use, (4) had open surgery for removal of hardware, (5) or had bilateral knee surgery. Total opioid consumption was reported at the first postoperative visit, and a distribution was created based on patient response. Based on the distribution, patients were separated into low (0-2 pills) versus high (3 or more pills) opioid consumption groups for evaluating risk factors for opioid use. The risk factors included were age, body mass index, smoking status, education level, baseline pain (Knee injury and Osteoarthritis Outcome Score pain subscale [KOOS Pain]), and baseline mental health (Veterans RAND 12-Item Health Survey Mental Component Score), as well as intraoperative findings such as synovial characteristics and extent of osteoarthritis in the multivariate model.

Results: Total opioid consumption ranged from 0 to 19 pills. The median pill count was 2 (25th; 75th interquartile range, 0; 4). Of total patients, 59% were categorized as having low opioid consumption, and the remaining 41% were in the high opioid consumption group. Only 23 patients (13.2%) took 6 or more pills. Preoperative pain as measured by KOOS Pain score was a significant predictor of high opioid consumption postoperatively (odds ratio, 0.97; 95% CI, 0.95-0.99; = .003).

Conclusion: The clinically relevant conclusion is that opioids are overprescribed after simple arthroscopic knee surgery. Based on distribution, the authors recommend that 4 pills be prescribed after simple arthroscopic knee surgery. After accounting for confounding variables, preoperative pain was associated with higher postoperative opioid consumption.