Abstract
OBJECTIVE
The purpose of this study was to investigate the postoperative change of hematological values between post cam type posterior stabilized (PS) and deep dish cruciate substituting (CS) type total knee arthroplasty (TKA).
MATERIALS AND METHODS
From June 1999 to December 2013, 322 patients with TKA due to osteoarthritis or rheumatoid arthritis were enrolled. In all knees, posterior cruciate ligament (PCL) were resected, and either Scorpio NRG PS knee (Stryker Orthopaedics) or Triathlon CS knee (Stryker Orthopaedics) were implanted. The PS group included 183 patients (183 knees) consisting of 4 men (4 knees) and 179 women (179 knees) with a mean age of 68.5 years (range 31 – 86 years). And the CS group included 139 patients (139 knees) consisting of 27 men (27 knees) and 112 women (112 knees) with a mean age of 75 years (range 42 – 98 years). Simultaneous bilateral TKA were excluded in this study. No case had blood transfusion in perioperative period. The changes of hemoglobin (Hb), d-dimer (DD) and c-reactive protein (CRP) were compared at pre-operative value, 1, 4, 7 and 14 days after surgery in two groups.
RESULT
In both groups, Hb was lowest at 4 days after surgery. CRP was highest at 4 days after surgery, and DD bimodal change high in one day and 14 days after surgery. In comparison with PS group and CS group. The values of Hb were significantly lower in PS group at 1, 4, and 7 days after surgery. The values of CRP changes were significantly higher in PS group than CS group at 1, 4, 7 days after surgery. And the values of DD were not significantly different in two groups.
CONCLUSION
In this study, PCL were resecte in all knee. The difference of surgical procedure in PS knee and CS knee was bone resection of femoral intercondylar notch. In PS knee, for the space of post cam mechanism, we had to remove some amount of the bone from the notch. In contrast, we did not have to remove the bone in CS knee. The difference of the procedure could be the causes of lower amount of bleeding and less surgical invasiveness presented by CRP changes in CS knee.
