Efficacy of JAS device on knee joint function after distal femoral osteosarcoma joint replacement surgery
Objective To investigate the effect of the JAS device on knee joint function following distal femoral osteosarcoma joint replacement surgery.Methods A total of 36 patients including 13 males and 23 females,ages 9-18,who underwent joint replacement surgery for distal femoral osteosarcoma at the Department of Bone Tumor,Shanghai General Hospital from January 2023 to March 2024 were selected and randomly divided into a control group of 19 cases and an experimental group of 17 cases.The control group received traditional rehabilitation therapy after surgery,while the experimental group received the JAS device combined with traditional rehabilitation therapy.The knee joint active range of motion(AROM)and hospital for special surgery knee score(HSS)were assessed at one month and three months postoperatively.Results At one month and three months postoperatively,there was a significant improvement in the knee AROM within experimental group after treatment[(58.5±9.0)° and(105.4±10.0)° respectively,P<0.05],a significant improvement within control group after treatment[(58.0±8.6)° and(90.6±3.3)° respectively,P<0.05],the experimental group showing a significantly higher improvement than the control group at three months postoperatively(P<0.05).There was a significant improvement in HSS scores within experimental group after treatment(68.0±6.4 and 83.8±3.9 respectively,P<0.05),a significant improvement within control group after treatment(67.2±6.2 and 77.3±2.6 respectively,P<0.05),the experimental group significantly higher than the control group at three months postoperatively(P<0.05).The incidence of complications in the experimental group and the control group were 5.9%(1/17)and 10.5%(2/19),there was no statistical significance(P>0.05).Conclusion The application of the JAS device can improve range of motion of the knee joint and promote the recovery of knee joint function after distal femoral osteosarcoma joint replacement surgery.