alexa Monitoring the quality of total hip replacement in a tertiary care department using a cumulative summation statistical method (CUSUM).


Industrial Engineering & Management

Author(s): Biau DJ, Meziane M, Bhumbra RS, Dumaine V, Babinet A, , Biau DJ, Meziane M, Bhumbra RS, Dumaine V, Babinet A,

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Abstract The purpose of this study was to define immediate post-operative 'quality' in total hip replacements and to study prospectively the occurrence of failure based on these definitions of quality. The evaluation and assessment of failure were based on ten radiological and clinical criteria. The cumulative summation (CUSUM) test was used to study 200 procedures over a one-year period. Technical criteria defined failure in 17 cases (8.5\%), those related to the femoral component in nine (4.5\%), the acetabular component in 32 (16\%) and those relating to discharge from hospital in five (2.5\%). Overall, the procedure was considered to have failed in 57 of the 200 total hip replacements (28.5\%). The use of a new design of acetabular component was associated with more failures. For the CUSUM test, the level of adequate performance was set at a rate of failure of 20\% and the level of inadequate performance set at a failure rate of 40\%; no alarm was raised by the test, indicating that there was no evidence of inadequate performance. The use of a continuous monitoring statistical method is useful to ensure that the quality of total hip replacement is maintained, especially as newer implants are introduced. This article was published in J Bone Joint Surg Br and referenced in Industrial Engineering & Management

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