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Study to Evaluate the Safety and Efficacy of a Low Level Light Device in Patients With Knee Osteoarthritis

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00375544
Recruitment Status : Completed
First Posted : September 13, 2006
Last Update Posted : August 14, 2009
Information provided by:
Light Sciences LLC

Brief Summary:
This Phase I study is being conducted to examine the efficacy of the Light Sciences LLC (LSLLC) phototherapy device for home (self) treatment of knee osteoarthritis (OA).

Condition or disease Intervention/treatment Phase
Osteoarthritis, Knee Device: Low level light therapy Phase 1

Detailed Description:

This Phase I study is being conducted to examine the efficacy of the Light Sciences LLC (LSLLC) phototherapy device for home (self) - treatment of knee osteoarthritis (OA). Clinical efficacy will be assessed by evaluating the level of reported pain, including the use of analgesics, various measures of functional improvement, and clinical symptomology during a three week period of daily treatments. Durability of the clinical response for twelve weeks following therapy will also be examined. In addition, device safety will be assessed. As this is an early stage-prototype device, subject input regarding the usability of the device will be sought.

Subjects will be required to achieve three weeks of wash-out from all OA therapies prior to the start of phototherapy. Acetaminophen will be allowed during this time. During the three week active treatment and twelve week follow-up periods, subjects will be required to refrain from acetaminophen as well as OA therapies. However, subjects will be encouraged to speak with the investigator should any symptoms become difficult to manage. In addition to clinical assessments, subjects will be required to keep a daily diary.

The clinical objectives of the study will be met if at least five of ten subjects report decreased pain scores and improvement on an osteoarthritis index. While minimum or no safety issues are expected, the occurrence of skin changes to the area exposed to the device will be carefully monitored.

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 10 participants
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: A Phase I Single Center Open Label Study to Evaluate the Safety and Efficacy of a Low Level Light Device in Patients With Knee Osteoarthritis
Study Start Date : September 2006
Actual Study Completion Date : November 2007

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Osteoarthritis

Primary Outcome Measures :
  1. Decreased pain scores on the visual analog scale (VAS)
  2. Improved Western Ontario and McMaster Universities Osteoarthritis index (WOMAC) scores

Secondary Outcome Measures :
  1. Reduced use of over the counter (OTC) analgesics post therapy
  2. Improved functionality as determined by measurable increases in knee range of motion (ROM)
  3. Increased exercise ability
  4. No, or decreased knee effusion
  5. Subject satisfaction
  6. Durability of the Clinical Response

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   40 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Male or female
  • At least age 40 years
  • Community ambulator without orthoses
  • Knee circumference in range of 35.5 - 43 cm. (14-17 inches)
  • Moderate OA according to clinician judgment, and/or Radiographic evidence of knee OA of Kellgren-Lawrence Grade II or III in one or both knees.
  • Exercise induced pain, or for subjects who do not exercise, pain resulting from the activities of daily living, of at least 3 months duration
  • Knee pain of greater than 1 on VAS within the last 24 hours before evaluation.
  • Fitzpatrick type I, II, or III skin. (very light to darker Caucasian/light Asian.) (Selection avoids excessive light absorption in epidermis)
  • Understands and agrees to comply with all study procedures including the daily treatments and follow-up visits
  • Able to understand and is voluntarily willing to sign an informed consent form for this study

Exclusion Criteria:

  • Pregnant or nursing, or with the ability to become pregnant and not using an accepted form of birth control
  • Other causes of knee-related pain (e.g. hip OA, arterial insufficiency, etc) have been ruled out by physical examinations
  • Fitzpatrick type IV, V, or VI skin. (Mediterranean/Asian/Hispanic to dark-skinned black)
  • Any active Cancer
  • History of melanoma to the limb that is being evaluated in this study
  • Uncontrolled diabetes mellitus
  • Untreated hypertension
  • Skin conditions that would interfere with device use/placement
  • Psychotic disorder(s), dementia, mental retardation, or other organic mental disorders (subjects who are not mentally and physically able to personally consent for participation in this study are not eligible)
  • Any other (including acute) condition, which in the opinion of the investigator, is likely to cause non-compliance or significantly impact treatment outcomes.
  • Subject has received intra- or peri- articular steroid, or other, injection therapy within 6 months prior to enrollment in this study.
  • Enrolled in any other clinical trial within the last 6 weeks or enrollment in another clinical trial during participation in this trial.

Subjects who cannot be expected to be able to comply with the following restrictions during the course of their participation in the study, including during the washout period:

  • Prescription NSAID use prohibited
  • Use of photosensitizing drugs prohibited
  • Physiotherapy prohibited for treatment to the limb(s) that is being evaluated in this study.
  • Glucosamine use prohibited

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00375544

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United States, Washington
Richard Neiman, M.D.
Kirkland, Washington, United States, 98034
Sponsors and Collaborators
Light Sciences LLC
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Study Director: James C Chen, M.D. Light Sciences LLC
Layout table for additonal information Identifier: NCT00375544    
Other Study ID Numbers: C00011
First Posted: September 13, 2006    Key Record Dates
Last Update Posted: August 14, 2009
Last Verified: August 2009
Keywords provided by Light Sciences LLC:
Laser Therapy, Low-Level
Osteoarthritis, knee
Light-emitting diode
Additional relevant MeSH terms:
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Osteoarthritis, Knee
Joint Diseases
Musculoskeletal Diseases
Rheumatic Diseases