Outcome Measurements Following Total Knee Arthroplasty

Main Article Content

Chavarin Amarase, MD
Aree Tanavalee, MD
Pathomporn Veerasethsiri, MD
Srihatach Ngarmukos, MD

Abstract

Total knee arthroplasty (TKA) is a definite surgical treatment for late stage knee osteoarthritis.
Currently, there are several outcome measurements following TKA which evaluate clinical signs and symptoms, functional activities, and postoperative radiographs. Patient-based evaluation with disease-specific assessment is simple while it provides good validity and reliability. Regarding patient-based evaluations with general health assessment, the short-form health survey (SF)-12 is less time consuming than the SF-36, while providing similar validity and reliability. Although the surgeon-based evaluation is still commonly used in outcome measurement following TKA, it has less responsiveness on the function subscale. Functional performance-based evaluation may not be a sufficient measurement at the immediate-term (< 3 months) follow up, as studies have shown poor improved function performance. However, to perform functional performance-based evaluation, the time-up-and-go test or 30-s chair stand test for performance functional-based evaluation are reliable and less time consuming assessments. On the other hand, the immediate post-surgery use of the 6-minute walk distance is somewhat questionable, as it takes a long evaluation time which may cause the patient to become exhausted.

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References

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