Effectiveness of low power laser on pain level, knee angle and physical performance among patients with total knee arthroplasty.

Authors

  • Phunyanuch Sonsin -

Keywords:

low-level laser therapy, total knee arthroplasty, pain, knee range of motion, functional mobility

Abstract

      This quasi-experimental study aimed to investigate the effects of low-level laser therapy on pain levels, knee range of motion, and functional mobility in patients following total knee arthroplasty. The sample consisted of 10 patients with knee osteoarthritis aged 50-70 years awaiting total knee replacement surgery at the Orthopedic Surgery Department, Wichian Buri Hospital, selected through purposive sampling. Participants received low-level laser therapy (wavelength 804 nm, power 500 mW, energy 10 joules per session) combined with a standard rehabilitation program. Outcome measures included the Numerical Rating Scale (NRS) for pain, a goniometer for knee flexion angle measurement, and the 3-meter Timed Up and Go test (TUG), assessed preoperatively and on postoperative days 1, 14, and 30. Data were analyzed using repeated measures ANOVA.

      Results showed statistically significant pain reduction on day 14 (2.4±1.65, p<0.05) and day 30 (0.8±1.32, p<0.001) compared to preoperative levels (6.0±2.05). Knee flexion angles on day 14 (108.70±13.38 degrees) and day 30 (113.0±12.04 degrees) returned to near-preoperative values (112.30±9.35 degrees, p>0.05). TUG scores on day 30 (35.80±9.32 seconds) approached preoperative values (29.10±8.03 seconds, p=0.20).

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Published

2025-12-31

How to Cite

Sonsin, P. . (2025). Effectiveness of low power laser on pain level, knee angle and physical performance among patients with total knee arthroplasty. Journal of Environmental Education Medical and Health, 10(4), 1073–1082. retrieved from https://so06.tci-thaijo.org/index.php/hej/article/view/291174