Clinical Outcomes of Minisubvastus Approach for Minimally Invasive Total Knee Arthroplasty
Samart Muangsiri MD*, Sompob Ruxasagulwong MD*, Jatupon Kongthawornskul MD*, Viroj Larbpaiboonpong MD*, Thana Turajane MD*
Affiliation : * Police General Hospital, Bangkok, Thailand
Objective : To examine the clinical outcome of minisubvastus approach, a true quadriceps- sparing approach
for minimally invasive knee arthroplasty.
Material and Method: Between January 2005 and January 2008, 398 knees were included in this study. We
evaluated the results of primary total knee arthroplasties performed with minisubvastus approach in patients
at a minimum 1-year follow-up period. A retrospective review of the patient medical records was used.
Results : The mean wound length was 11 centimeters and mean blood loss was about 478 milliliters. An
average total operative time was 112 minutes. The mean femorotibial angle was corrected from 8 degrees
varus preoperatively to 4 degrees valgus postoperatively. Pain assessed by WOMAC score was much improved
as the mean score decreased from 50.84 at preoperative to 26.81 at one-year postoperative period.
Conclusion : Minisubvastus arthroplasty is effective and can be performed in almost of knee deformities.
Keywords : Minimally invasive, Minisubvastus, Total knee arthroplasty, Knee deformity
