Efficacy of Adductor Canal Block on Medial Knee Pain in Patients with Knee Osteoarthritis: A Randomized Single-Blind Placebo-Controlled Study

Ki-Yong Kim, Yool-Gang Huh, Sang Hyeok Ma, Jong Hyeon Yoon, Kil-Yong Jeong, Do Young Park and Seung-Hyun Yoon ()
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Ki-Yong Kim: Department of Physical Medicine and Rehabilitation, Ajou University Medical Center, Suwon 16499, Republic of Korea
Yool-Gang Huh: Department of Physical Medicine and Rehabilitation, Ajou University Medical Center, Suwon 16499, Republic of Korea
Sang Hyeok Ma: Department of Physical Medicine and Rehabilitation, Ajou University Medical Center, Suwon 16499, Republic of Korea
Jong Hyeon Yoon: Department of Physical Medicine and Rehabilitation, Ajou University Medical Center, Suwon 16499, Republic of Korea
Kil-Yong Jeong: Department of Physical Medicine and Rehabilitation, Ajou University Medical Center, Suwon 16499, Republic of Korea
Do Young Park: Department of Orthopedic Surgery, Ajou University Medical Center, Suwon 16499, Republic of Korea
Seung-Hyun Yoon: Department of Physical Medicine and Rehabilitation, Ajou University Medical Center, Suwon 16499, Republic of Korea

IJERPH, 2022, vol. 19, issue 22, 1-9

Abstract: Background: This study aimed to confirm the efficacy of ultrasound-guided adductor canal block (ACB) as a treatment option for medial knee pain caused by knee osteoarthritis (KOA). Methods: In total, 31 participants with medial knee pain due to KOA were randomized to either the ACB (ultrasound-guided ACB, n = 15) or placebo group (1 mL of 1% lidocaine, n = 16). The primary outcome was a numerical rating scale (NRS) for knee pain intensity comparing before and 4 weeks after injection. The secondary outcomes were the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), average daily number of analgesics consumed, average daily opioid consumption, and Timed Up and Go (TUG) test results before and 4 weeks after injection. Results: Participants’ baseline characteristics were not significantly different between the groups, except for age. At 4 weeks post-injection, the NRS score in the ACB group significantly improved compared to that in the placebo group ( p = 0.009). However, the WOMAC, average daily number of analgesics consumed, average daily opioid consumption, and TUG test results did not show significant differences. Conclusion: ACB can be an effective treatment for reducing medial knee pain in patients with KOA.

Keywords: nerve block; osteoarthritis; knee joint; pain management; anesthetics (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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