Incidence and reasons for reoperation after minimally invasive unicompartmental knee arthroplasty.
The goal of this report is to review reoperations undertaken on the initial 221 unicompartmental arthroplasties performed using a minimally invasive technique. A comparison was then performed between these cases and the previous 514 open medial unicompartmental arthroplasties performed at our institution. In the minimally invasive group, 9 (4.1%) of 221 knees were revised (8 for component loosening, 1 for deep infection). Of 212 unrevised knees, 16 have required a total of 18 nonrevision reoperations. Overall, 25 of 221 knees required at least 1 reoperation (total reoperation rate, 11.3%). Despite an accelerated recovery and decreased hospital stay in our minimally invasive unicompartmental arthroplasties, the rate of revision due to aseptic loosening (3.7% vs 1.0%) and the overall reoperation rate (11.3% vs 8.6%) compare unfavorably with those performed with an open technique.
Hamilton
William G
WG
Anderson Orthopaedic Research Institute, Alexandria, Virginia, USA.
Collier
Matthew B
MB
Tarabee
Eshan
E
McAuley
James P
JP
Engh
C Anderson
CA
Engh
Gerard A
GA
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects* / Q000379:methods; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging; D007902:Length of Stay; D008297:Male; D008875:Middle Aged; D019060:Minimally Invasive Surgical Procedures / Q000009:adverse effects* / Q000379:methods / Q000706:statistics & numerical data; D011475:Prosthesis Failure; D011859:Radiography; D012086:Reoperation / Q000706:statistics & numerical data; D012189:Retrospective Studies; D016896:Treatment Outcome