Short-Term Outcomes of Miller Galante(R) Fixed-Bearing Unicondylar Knee Arthroplasty: A Comparative Study in Outcomes according to Postoperative Correction Angle / 대한정형외과학회잡지

PURPOSE: To evaluate short-term clinical and radiographical results of fixed bearing unicondylar knee arthroplasty (UKA) comparing results between over-corrected group and under-corrected group. MATERIALS AND METHODS: Clinical and radiographical outcomes of 47 Miller-Galante(R) UKAs with a minimum of 4-year follow-up were evaluated. We also compared both clinical and radiographical results between over and under corrected groups, which were divided by 2degrees varus of mechanical axis postoperatively. RESULTS: HSS and WOMAC scores improved from 75.4 and 57.7 preoperatively to respectively, 95.2 and 12.1 at the last follow up. Radiographically, the mechanical axis changed from 7.2degrees varus preoperatively to 2.8degrees varus at the last follow-up. A partial radiolucent line on the medial side of the tibia was observed in 23% of the 47 cases. Degenerative changes in the lateral compartment and the patellofemoral joint were observed, respectively, in 23% and 26%. There were no significant differences between the two groups in clinical and radiographical results (p>0.05). In the undercorrected group, three cases converted to total knee arthroplasty because of medial tibial collapse. CONCLUSION: Miller-Galante(R) UKA showed good outcomes in short-term follow-up with the exception of three failures. There were no significant differences between more than 2degrees varus corrected and under 2degrees varus corrected groups in clinical and radiographical results. However, all 3 conversions to total knee arthroplasties occurred in the undercorrected group.

Protocol for Administration of Prophylactic Antibiotics within One Hour before the Surgical Incision in Total Hip and Knee Replacement / 대한정형외과학회잡지

PURPOSE: We aimed that compliance could be improved by new protocol ensuring the adequate timing of intravenous antibiotic delivery onto an already existing time out system used to ensure exact surgical site. MATERIALS AND METHODS: A group of 150 patients was administered prophylactic antibiotics just before entering operation room and performed only time-out protocol. Other group of 150 patients was administered prophylactic antibiotics directly after anesthetic induction and perfomed new protocol inclusive of checklist ensuring appropriate timing of antimicrobial prophylaxis. We compared mean time from prophylactic administration to surgical incision and compliance. RESULTS: The average time from administration of the antimicrobial prophylaxis to the surgical incision for patients who was performed only time-out protocol was 43 minutes and compliance was 60.6%. The average time from administration of the antimicrobial prophylaxis to the surgical incision for patients who was performed new protocol was 18 minutes and compliance was 100%. There was a significant difference in compliance of two groups. CONCLUSION: New protocol ensuring the adequate timing of intravenous antibiotic delivery combined with administration of the antimicrobial prophylaxis directly after anesthetic induction were effective and easily adaptable method to ensure compliance with appropriate timing of prophylactic antibiotics.