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FPI problem

Discussion in 'Biomechanics, Sports and Foot orthoses' started by maxants33, Feb 28, 2013.

  1. maxants33

    maxants33 Active Member


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    Hello
    I was wondering something about Redmond's FPI 6.
    Its a funny thing, I know its far from perfect, but I have a supinated foot with a high arch in weight bearing, but I score +2 with the FPI and am accordingly classified as pronated. But, its because I have quite a lot of out toeing due to external tibial torsion. I think this is a major drawback, but surely Dr Redmond would have accounted for out or in toeing, but I cannot find any info on the subject. Does anyone know whether anything has been published that accommodates for this factor?
     
  2. One of the main drawbacks of the Foot Posture Index, from my perspective, is that it averages any "pronated" measurement parameters with any "supinated" measurement parameters that the foot may possess, which would, therefore, not give you a clear picture of what the subtalar joint moments are likely to be during weightbearing activities. In other words, the FPI value may have nothing to do with whether ground reaction force is causing a net subtalar joint supination moment or a net subtalar joint pronation moment in any foot during weightbearing activities.

    I consider the FPI more of a tool that is best used to group feet together for research projects. I wouldn't recommend using the FPI as a tool to determine how best to treat patients biomechanically or to determine the external and internal forces that are leading to their mechanically-based pathologies.
     
  3. maxants33

    maxants33 Active Member

    Thanks Kevin, great answer!
     
  4. N.Knight

    N.Knight Active Member

    Kevin, you have just said the same thing I tell the physio I work with, they love sticking numbers and degrees to everything, however the way you just put it across is so much better than mine.

    Thanks you

    Also with the FPI isn't 0 - +4 classed as 'normal'

    I like the FPI to help describe what the foot looks like in a static weight bearing position, I think people use it wrongly when they try and use it as a functional tool to relate to pathology or attach pathologies to certain scores on the FPI. Surely that is not the FPI fault however people using it incorrectly?

    Nick
     
  5. blinda

    blinda MVP

    I agree with Kevin and Nick. Think I`ve said this before in another thread (where Dennis was promoting his foot-typing system); As a purely descriptive tool the FPI does not identify state, stage or causality of disease process and is thus of little clinical use as a predictor of pathology.

    Bel
     
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