Acupuncture Effect on Analgesic Consumption and Cortisol Levels Following Total Knee Arthroplasty: A Randomized Controlled Trial.

Objective: Pain following total knee arthroplasty (TKA) is common. Various modalities of treating orthopedic postoperative pain (POP) exist; however, the optimal management of POP remains unclear. The purpose of this study was to examine acupuncture's effect on postoperative analgesic consumption and cortisol levels in patients undergoing TKA.

Materials and methods: In this randomized controlled trial, 80 patients scheduled for elective TKA surgery were recruited and randomly assigned to 2 groups: (1) an intervention group, receiving acupuncture treatment on days 1 and 2 in addition to standard POP management (n = 40) and a control group, who received standard POP management only (n = 40).

Results: There was no statistical difference between the groups in analgesic consumption on days 1 and 3 postoperatively. On day 5 postoperatively, lower analgesic consumption was seen in the intervention group, compared to the control group. However, this difference was not statistically significant (1.4 versus 2.3, respectively; P = 0.215). There was no statistical difference between the groups in cortisol levels on day 1 postoperatively. In contrast, on day 2 postoperatively, cortisol level was significantly lower in the intervention group, compared to the control group (296 nmol/L versus 400 nmol/L, respectively; P < 0.05).

Conclusions: The findings suggest that acupuncture may have some effect on patients' analgesic consumption short-term after TKA. Further studies with larger samples are required for establishing these results.This trial was registered at ClinicalTrials.gov (Registration #: NCT03415204).