Study of Photobiomodulation Therapy for Chronic Knee Pain in Obese Patients Preparing for Bariatric Surgery

What this Trial Is About

Researchers are investigating the use of photobiomodulation PBM therapy to help obese patients with chronic knee pain who are preparing for bariatric surgery. Chronic knee pain is common in this group and can limit participation in prehabilitation programs that aim to reduce complications after surgery. This trial is a double-blind, randomized, placebo-controlled study evaluating PBMs effects on pain and knee function, with a focus on its role in pain relief and modifying pain pathways. PBM is considered a safe and low-cost treatment option with no known harmful effects. Participants will be divided into two groups one receiving PBM therapy combined with standard physiotherapy exercises, and the other receiving placebo PBM device turned off alongside the same physiotherapy program. The PBM treatment uses a low-intensity laser applied to specific points on the knees and lumbar spine twice weekly for 12 weeks. Dosage is set at 4 Joules per point on the knees and 3 Joules per point on the lumbar area, with treatment lasting 30 to 40 seconds per point. During the study, participants will undergo assessments at the start and end of the 14-week period, including pain intensity measured by a visual analogue scale, knee function using the KOOS questionnaire, pressure pain thresholds, and a rolling pinch test. Additional evaluations include a six-minute walk test, knee range of motion, and a quality of life questionnaire SF-36. The study will monitor outcomes closely and analyze data statistically to better understand PBMs role in managing chronic knee pain in this population.

Photobiomodulation in Chronic Knee Pain in Patients Who Are in PreRehabilitation for Bariatric Surgery