Dear Dave,

Good to hear from you again and thank you for sending me your note. The
Orthoscanner is quite unique in that it is dynamic yet can measure to
computer accuracy open kinetic chain position and movement also either
active movement or active movement against passive resistance. The
important thing is that it also measures with time on all planes
simultaneously. If you now compare this to traditional technology where we
measure available passive movement around a subtalar joint neutral position
(which may or may not exist) with a 2 dimensional instrument similar to a
protractor with the patient at rest and on a couch, then we have to ask
what reliable and reproducible information we can gather from this. Keeping
in mind that if a given patient was measured for ankle dorsi-flexion by 10
practitioners, we would probably have 10 different results. Additionally,
if slipper casts were also taken again 10 identical casts are unlikely.

The whole purpose of the Orthoscanner is to apply accuracy in measurement
at any moment in time on all planes in a reproducible way. We cannot
compare it with any other system for it is the only machine of its type.
Reproducibility tests within the laboratory have proven to be of accuracies
not achievable by any other means and certainly not by traditional
technology.

Within the laboratory we employ the latest software available and all
information gathered goes to a database. It is this database that
establishes our criteria for normalcy. As the database grows we will be
able to refine our findings. Given all of the above with regard to
traditional technology is it possible to establish meaningful criteria by
that method?

Thank you once again for your response and if you want to talk to me my
telephone number is 01224 621 982.

Kind Regards


Ken

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