Abstract
Purpose of study:
A retrospective clinical and telephonic survey of AMIS patients. Minimally Invasive Anterior Hip Replacements have been performed according to the AMIS technique in two centres in South Africa on a regular basis since 2 February 2007.
We report on the first 335 cases that were done from February 2007 till October 2009 in these two centers, by two surgeons.
Description of methods:
The data reported from these patients was collected from clinical notes, hospital records and telephonic questionnaires. Of the 335 cases that were performed data could be collected from 283 patients. Patients lost to follow up were 16 deceased, 24 could not be reached and 12 others had co-morbidities like Alzheimers, Total deafness and CVA.
Summary of results:
The data collected includes: Patient demographics, diagnosis, co-morbidities. We also collected data of the surgical procedures including the duration of the procedure, prosthesis used, and hospital stay. We also collected data of the functional activities and time duration to achieving this. These activities include driving a car, shopping, domestic work, gardening and sport like hiking and golf.
Complications reported include superficial wound infection 4, deep infections 1, dislocation 6, hematoma 8, impingement 1 and fractures 4. Total rate of revision was 2.47 %. Analysis of the causes of revision were; subsidence and dislocation 3, anterior acetabular impingement 1, proximal femoral loosening and persistent thigh pain 1, fractured ceramic liner 1, displaced acetabular component 1.
Discussion:
The anterior approach for total hip replacement is a new method that preserves all the musculature around the hip joint with resultant benefits. This is a demanding technique that is reflected in the results. 80 % of the revisions were encountered in the first 50 cases.
