Triathlon Outcomes Study

Knee replacement is a common operation, with about 100,000 people having a knee replacement every year in the NHS. To ensure that patients receive the best care, studies are carried out to find out how well people do after their knee replacement.

In this study, we are monitoring the results of the Triathlon knee replacement. The Triathlon prosthesis was developed to produce natural knee motion and a greater range of flexion. 

Between 2006-2009, 266 patients in Bristol were recruited into the study. We have followed up patients at 3 months, 1 year, 2 years, 3 years, 5 years, 7 years and 10 years after their knee replacement. At each time point, we asked people to fill in questionnaires and have their knee examined by a physiotherapist so that we could find out how well people are doing after their Triathlon knee replacement. We have now finished data collection and are analysing the results.

As well as looking at how well people do with a Triathlon knee replacement, we have looked at other important questions in this study, such as how mental wellbeing affects people’s pain and mobility after a knee replacement.

The study team is led by Professor Ashley Blom working alongside Dr Vikki Wylde, Alice Rose and Professor Michael Whitehouse. The study is funded by Stryker UK. The team have so far published the following papers from the Triathlon Outcomes Study: 

           

• Comparison of patient reported outcomes after Triathlon and Kinemax Plus prosthesis
  
• The role of preoperative self-efficacy in predicting outcome after total knee replacement 
• Preoperative psychosocial risk factors for poor outcomes at 1 and 5 years after total knee replacement
• 5 year outcomes and survivorship of the Triathlon total knee replacement: a cohort study 
• Variability in long-term pain and function trajectories after total knee replacement: A cohort study

For further information, please contact Dr Vikki Wylde. ‌