ClinicalTrials.Veeva

Menu

Low Power Laser and Exercise in Osteoarthritis of the Knee: a Randomized Clinical Trial

U

University of Sao Paulo General Hospital

Status and phase

Completed
Phase 2

Conditions

Osteoarthritis

Treatments

Other: Placebo Laser
Other: Laser

Study type

Interventional

Funder types

Other

Identifiers

Details and patient eligibility

About

Indroduction: Knee osteoarthritis (OA) is a painful condition causing disability, weakness and poor quality of live. The results are very consistent about the benefits of laser and exercises to improve pain and function in subjects with knee osteoarthritis Objectives: To investigate the effects of Low Power Laser (LBP) associated with exercise in pain, function, range of motion, muscle strength and quality of life of patients with knee osteoarthritis.

Methods: Forty patients of both sexes aged between 50 and 75 years with knee osteoarthritis (grade 2-4) were randomized into two groups: Laser-LBP-active dose of 3J more exercises and Group Placebo-LBP- placebo and exercise. Were evaluated for pain, function, range of motion, muscle strength and quality of life on three occasions: before starting treatment (evaluation 1), 3 weeks after laser application (evaluation 2) and 8 weeks after completion of exercise (evaluation 3). There were 33 physical therapy sessions three times a week, on March 1 and the laser was applied in the other, only the exercises.

Full description

Pain: Pain intensity was measured with the Visual Analogue Scale (VAS) which is a straight 10 cm long devoid of numbers, in which there is only an indication of the extreme left of "no pain" and extreme right to "unbearable pain". The higher the score, the greater the pain.

Feature: Survey conducted by Lequesne, which is an index composed of 11 questions about pain, discomfort and function. The scores range from 0 to 24 (without affecting the extremely severe, respectively), the higher the score, the greater the impairment.

Range of motion (ROM): ADM flexion and knee extension was measured using a universal goniometer (AESCULAP) with the patient prone second methodology Marques.

Muscular Strength: To assess the maximal isometric strength of the quadriceps muscle was used Dynamometer model Lafayette ® Portable (USA), while seated at 60 ° of knee flexion and this gradation was controlled with a goniometer. Patients remained seated on the stretcher and held steady with thigh extension strength, the dynamometer being maintained in the distal leg. Three measurements were taken, and the mean value.

Quality of Life: The Questionnaire was used Western Ontario and McMaster Universities Osteoarthritis (WOMAC)a self-assessment that evaluates pain, stiffness and physical activity. The higher the score, the greater the impact of OA on quality of life.

Enrollment

40 patients

Sex

All

Ages

50 to 75 years old

Volunteers

No Healthy Volunteers

Inclusion criteria

  • Diagnoses of osteoarthritis
  • Knee pain
  • Functional reduction in the last three months
  • Grade 2-4 OA
  • Fulfilled at least one of the classification criteria of the American College of Rheumatology

Exclusion criteria

  • Cancer
  • Diabetes mellitus
  • Symptomatic hip OA
  • Antidepressants
  • Anti-inflammatory steroidal and nonsteroidal or tranquilizers in the last six months and throughout the treatment

Trial design

Primary purpose

Treatment

Allocation

Randomized

Interventional model

Parallel Assignment

Masking

Double Blind

40 participants in 2 patient groups, including a placebo group

Laser Group
Experimental group
Treatment:
Other: Laser
Placebo Group
Placebo Comparator group
Treatment:
Other: Placebo Laser

Trial contacts and locations

1

Loading...

Data sourced from clinicaltrials.gov

Clinical trials

Find clinical trialsTrials by location
© Copyright 2026 Veeva Systems