Purpose: This study examined the frequency of early cessation of intravenous patient-controlled analgesia (IV-PCA) after orthopedic surgery, and the difference in frequency according to the surgical site and type to determine the factors affecting the early cessation of IVPCA. Materials and Methods: Based on the medical records of 2,915 patients using PCA after orthopedic surgery from October 2018 to February 2020, sex, age, smoking status, surgical site, operation name, anesthesia method, PCA usage time, satisfaction, side effects, early discontinuation and the reason of early discontinuation were assessed. Orthopedic surgery was classified into major surgery and minor surgery, and the surgical site was classified into the upper limb, lower limb, and spine. The reasons for discontinuation were side effects, patient rejection, and discharge. The factors affecting early discontinuation were identified by univariate analysis, and the degree of each factor affecting early discontinuation was confirmed by logistic regression analysis. Results: The early discontinuation rate of IV-PCA was 6% (upper limb: 8.3%, lower limb: 5.7%). Univariate analysis identified, age, surgical site, surgical classification, anesthesia method, PCA usage time, satisfaction, and side effects as factors affecting early discontinuation. Logistic regression analysis showed that early discontinuation of the upper limb surgery was higher than the lower extremity surgery (p=0.005, odds ratio [OR]=1.78). Moreover, that the early discontinuation of minority surgery was higher than that of major surgery (p=0.002, OR=2.029). The most common reason for early discontinuation in lower extremity surgery is the side effects (71.5%), whereas patient rejection was the major reason in upper limb surgery (41.7%). Conclusion Early cessation of IV-PCA for postoperative pain control was more frequent in upper extremity surgery than lower extremity surgery. The rate of early discontinuation due to simple rejection or discharge of patients was higher in the upper extremity surgery than lower extremity surgery. Therefore, methods such as neuroaxial anesthesia should be considered for pain control after upper limb surgery rather than IV-PCA.

Background: In this study, we report satisfactory clinical and radiological outcomes after autologous oblique structural peg bone and cancellous chip bone grafting without metal augmentation, including the use of a metal wedge, block, or additional stem, for patients with ≥ 10-mm-deep uncontained medial proximal tibial bone defects in primary total knee replacement. Methods: The study group included 40 patients with primary total knee replacement with ≥ 10-mm-deep uncontained tibial bone defects who underwent autologous oblique structural peg bone and cancellous chip bone grafting and were followed-up for at least 1 year. Tibial cutting was performed up to a depth of 10 mm from the articular surface of the lateral tibial condyle, after which the height and area of the remaining bone defect in the medial condyle were measured. The bone defect was treated by making a peg bone and chip bone using excised segments of the tibia and femur. In all cases, the standard tibial stem and full cemented fixation techniques were used without metal augmentation. Preoperative and final follow-up radiologic changes and clinical measures were compared, and prosthesis loosening and bone union were checked radiologically at final follow-up. Results: The mean depth of the bone defects was 10.9 mm, and the mean percentage of the area occupied by bone defects in the axial plane was 18.4%. The mean mechanical femorotibial angle was corrected from 19.5° varus preoperatively to 0.2° varus postoperatively (p < 0.002). There was no prosthesis loosening, and all cases showed bone union at the 1-year postoperative follow-up. Conclusions Even in patients with uncontained tibial bone defects ≥ 10-mm deep in primary total knee replacement, if the defect occupies less than 30% of the cut surface, autologous oblique structural peg bone and cancellous chip bone grafting can be used to achieve satisfactory outcomes with a standard tibial stem and no metal augmentation.

Background: In this study, we report satisfactory clinical and radiological outcomes after autologous oblique structural peg bone and cancellous chip bone grafting without metal augmentation, including the use of a metal wedge, block, or additional stem, for patients with ≥ 10-mm-deep uncontained medial proximal tibial bone defects in primary total knee replacement. Methods: The study group included 40 patients with primary total knee replacement with ≥ 10-mm-deep uncontained tibial bone defects who underwent autologous oblique structural peg bone and cancellous chip bone grafting and were followed-up for at least 1 year. Tibial cutting was performed up to a depth of 10 mm from the articular surface of the lateral tibial condyle, after which the height and area of the remaining bone defect in the medial condyle were measured. The bone defect was treated by making a peg bone and chip bone using excised segments of the tibia and femur. In all cases, the standard tibial stem and full cemented fixation techniques were used without metal augmentation. Preoperative and final follow-up radiologic changes and clinical measures were compared, and prosthesis loosening and bone union were checked radiologically at final follow-up. Results: The mean depth of the bone defects was 10.9 mm, and the mean percentage of the area occupied by bone defects in the axial plane was 18.4%. The mean mechanical femorotibial angle was corrected from 19.5° varus preoperatively to 0.2° varus postoperatively (p < 0.002). There was no prosthesis loosening, and all cases showed bone union at the 1-year postoperative follow-up. Conclusions Even in patients with uncontained tibial bone defects ≥ 10-mm deep in primary total knee replacement, if the defect occupies less than 30% of the cut surface, autologous oblique structural peg bone and cancellous chip bone grafting can be used to achieve satisfactory outcomes with a standard tibial stem and no metal augmentation.