APPORTIONMENT TO MEDICAL TREATMENT - THE HIKIDA EFFECT

  In certain circumstances, injured workers suffer a Permanent Disability  as a result of the medical treatment that he/she received.  An example  of this is a total knee replacement.  The AMA Guides provides an  Impairment Rating for this exact surgical procedure.  Another example  would be amputation - the Impairment rating for amputation is due to the  surgical procedure.  These are just a couple of examples and there are many many more  circumstances where, as a result of the medical treatme