Light Knee Study - A randomized control trial examining photobiomodulation (PBM) therapy before and after knee replacement surgery.

Knee osteoarthritis requiring joint replacement surgery

Associate Professor Liisa Laakso is testing effectiveness of a light-emitting adhesive patch that shines red and blue light to the knee joint and thigh muscle. Each participant is given four “light-patches” to place on their leg for 30 minutes a day for several weeks, before and after knee surgery.

The researchers ask participants to do simple physical tests and complete questionnaires several times during the study to determine if the light-therapy is beneficial. We also examine bone taken from the knee during surgery, to see if there has been a change here too.

Prof. Laakso is recruiting 60 Mater patients to be part of the study, some of whom will receive a sham treatment instead of light-therapy.

Trial Status
Trial Phase
Medical Device Post-Market Study
Universal Trial Number (UTN)
Trial contact details
Contact Person
A/Prof Liisa Laakso
What you need to know

Who can take part?

  • Patients scheduled to have their knee replaced under any of the participating orthopaedic surgeons at Mater Hospital Brisbane (Drs Smith, Radovanovic, Jenkins, O’Neill, and Journeaux)
  • Aged between 60 to 87 years old
  • No pre-existing problems of pronounced weakness or poor sensation in the leg.

What is involved for you?

  • The participant receives a light-therapy kit for use at home over 3 weeks, once a day for 30 minutes
  • Each participant keeps a simple journal of their pain levels
  • There are 9 home-visits in total throughout the study
  • The first visit is one week before the knee surgery, and the last is 12 months later
  • Each home visit includes several simple physical tests and questionnaires regarding the participant’s knee

Trial dates

This trial is accepting participants until June 2023.

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