Objective:To compare the outcomes of dynamic hip screws(DHS)and intramedullary nailing(IMN)in the treatment of extra-capsular metastatic carcinoma of the proximal femur.Methods:A retrospective case analysis method was...Objective:To compare the outcomes of dynamic hip screws(DHS)and intramedullary nailing(IMN)in the treatment of extra-capsular metastatic carcinoma of the proximal femur.Methods:A retrospective case analysis method was used to examine data of patients with proximal metastatic cancer of the femur who were treated with internal fixation in Department of Orthopaedics,Beijing Friendship Hospital,from January 2007 to December 2018.Blood loss,postoperative pain,functional score,length of stay,and survival rates were compared,and postoperative complications were assessed.Results:Complete follow-up data were available for 33 patients.The mean follow-up period was 12.2±3.6(range:9-32)months and the average age was 72.3±4.7(range:59-83)years old.There were 20 females and 13 males.Twenty-three patients had undergone IMN and 10 DHS,according to bone defects and the patient’s overall condition.The median survival time was 10 months in the IMN group and 11 months in the DHS group.Duration of surgery(t=-7.366,P<0.001)and length of hospital stay(t=-3.509,P<0.001)differed significantly between the two groups.There was one case of breakage of internal fixation in the IMN group.Conclusions:There was no significant difference between DHS and IMN in terms of surgical efficacy.IMN and DHS were different in terms of surgical time and hospital stay.However,due to the limited number of cases in this study,multi-factor analysis has not been performed and needs to be further verified in future analysis.When developing a surgical plan,it is recommended to consider the patient’s condition and the surgeon’s experience.展开更多
Background: Internal fixation is appropriate for most intertrochanteric fractures. Optimal fixation is based on the stability of fracture. The mainstay of treatment of intertrochanteric fracture is fixation with a scr...Background: Internal fixation is appropriate for most intertrochanteric fractures. Optimal fixation is based on the stability of fracture. The mainstay of treatment of intertrochanteric fracture is fixation with a screw slide plate device or intramedullary device. So it is a matter of debate that which one is the best treatment, dynamic hip screw or proximal femoral nailing. Method: A prospective randomized and comparative study of 2 years duration was conducted on 60 patients admitted in the Department of Orthopedics in our hospital with intertrochanteric femur fracture. They were treated by a dynamic hip screw and proximal femoral nail. Patients were operated under image intensifier control. The parameters studied were functional outcome of Harris hip score, total duration of operation, rate of union, amount of collapse. These values were statistically evaluated and two tailed p-values were calculated and both groups were statistically compared. Result: The average age of our patient is 67.8 years. Among the fracture, 31% were stable, 58% were unstable, 11% were reverse oblique fracture. The average blood loss was 100 and 250 ml in PFN and DHS group, respectively. In PFN there was more no. of radiation exposure intraoperatively. The average operating time for the patients treated with PFN was 45 min as compared to 70 min in patients treated with DHS. The patients treated with PFN started early ambulation as they had better Harris Hip Score in the early period (at 1 and 3 months). In the long term both the implants had almost similar functional outcomes. Conclusion: In our study we have found that the unstable pattern was more common in old aged patients with higher grade of osteoporosis and PFN group has a better outcome in this unstable and osteoporotic fracture. PFN group has less blood loss and less operating time compared to DHS group. In PFN group patients have started early ambulation compared to DHS group.展开更多
To assist an amputee in regaining his or her daily quality of life,based on analysis of the motion characteristics of the human hip,a 2-UPR/URR parallel mechanism with a passive limb was designed.The inverse kinematic...To assist an amputee in regaining his or her daily quality of life,based on analysis of the motion characteristics of the human hip,a 2-UPR/URR parallel mechanism with a passive limb was designed.The inverse kinematics of this mechanism was analyzed based on a closed-loop vector method.The constrained Jacobian matrix and kinematic Jacobian matrix of each limb were then analyzed,and a 6×6 fully Jacobian matrix was constructed.Based on this,kinematic performances were analyzed and summarized.Finally,the dynamic model of the mechanism was constructed based on the virtual work principle,and its theoretical solution was compared with the numerical results,which were obtained in a simulation environment.Results showed that the prosthetic mechanism had a larger rotating workspace and better mechanical performance,which accorded a range of motion and bearing capacity similar to that of the human hip in multiple gait modes.Moreover,the validity of the dynamic model and inverse kinematics were verified by comparing the theoretical and simulation results.Furthermore,with flexion and extension,the torque change in the hip prosthetic mechanism was similar to that of the human hip,which demonstrated the feasibility of the hip prosthetic mechanism and its good dynamic performance.展开更多
目的:比较采用动力髋螺钉(dynamic hip screw,DHS)、Gamma钉和股骨近端髓内钉(proximal femoral nail,PFN)治疗老年股骨转子间骨折的术中情况、术后并发症及疗效。方法:2001年2月-2005年5月,分别采用DHS(DHS组,56例)、Gamma钉(Gamma钉组...目的:比较采用动力髋螺钉(dynamic hip screw,DHS)、Gamma钉和股骨近端髓内钉(proximal femoral nail,PFN)治疗老年股骨转子间骨折的术中情况、术后并发症及疗效。方法:2001年2月-2005年5月,分别采用DHS(DHS组,56例)、Gamma钉(Gamma钉组,20例)和PFN(PFN组,51例)治疗并随访老年股骨转子间骨折患者127例。比较3组患者手术情况、术后并发症及功能恢复情况。结果:各组间手术时间两两比较均有显著差异(P<0.01),DHS组最长,PFN组最短。Gamma钉组和PFN组术中出血量少于DHS组(P<0.01)。DHS组发生术后髋内翻、肢体短缩及并发症总数多于Gamma钉组和PFN组(P<0.01)。DHS组、Gamma钉组和PFN组优良率分别为82.14%、85.00%和90.20%,组间疗效差异不显著(P>0.05)。结论:应用DHS、Gamma钉和PFN治疗老年股骨转子间骨折,在疗效方面无明显差异。Gamma钉和PFN可缩短手术时间、减少术中出血量及术后并发症。展开更多
目的分析动力髋螺钉(dynamic hip screw,DHS)和Gamma钉在老年股骨粗隆间骨折中的治疗选择和临床疗效。方法对70例老年股骨粗隆间骨折分别行手术治疗,其中DHS内固定49例,Gamma钉内固定21例。比较两组术中和术后多项相关指标(如手术时间...目的分析动力髋螺钉(dynamic hip screw,DHS)和Gamma钉在老年股骨粗隆间骨折中的治疗选择和临床疗效。方法对70例老年股骨粗隆间骨折分别行手术治疗,其中DHS内固定49例,Gamma钉内固定21例。比较两组术中和术后多项相关指标(如手术时间、切口长度、术中出血量、术后引流量、X线暴露次数等),并行统计学分析。结果Gamma钉组与DHS组相比较术中出血量、切口长度差异均具有显著性(P<0.05);Gamma钉组与DHS组相比较在手术中X线暴露次数增多(P<0.05);而Gamma钉组与DHS组术后引流量、骨折愈合时间、手术时间比较差异无显著性(P>0.05)。结论只要适应证掌握得当,合理选择内固定,手术操作规范,DHS和Gamma钉治疗老年股骨粗隆间骨折均可以获得相同良好的临床效果,而Gamma钉手术创伤较小,更适用于高龄患者。展开更多
目的:对比研究股骨近端抗旋转刀片髓内钉(proximal femoral nail antirotation,PFNA)与动力髋加压螺钉(dynamic hip screw,DHS)治疗老年股骨粗隆间骨折的临床疗效。方法:选取2010年4月-2012年7月于本院诊治的96例股骨粗隆间骨折并给予...目的:对比研究股骨近端抗旋转刀片髓内钉(proximal femoral nail antirotation,PFNA)与动力髋加压螺钉(dynamic hip screw,DHS)治疗老年股骨粗隆间骨折的临床疗效。方法:选取2010年4月-2012年7月于本院诊治的96例股骨粗隆间骨折并给予手术治疗的患者,根据手术方法不同分为PFNA组和DHS组,其中PFNA组58例,DHS组38例。分别对两组的患者术后临床疗效进行回顾性的分析与研究,术后临床疗效的评估采用Sander’s评分系统评价患者的髋关节及术后疗效。结果:PFNA组与DHS组治疗髋关节稳定型的股骨粗隆间骨折术后临床疗效优良率达到100%,术后疗效差异无统计学意义(P>0.05);对于不稳定的股骨粗隆间骨折,PFNA组的治疗疗效优于DHS组,两组比较差异有统计学意义(P<0.05)。结论:对于髋关节稳定的股骨粗隆间骨折,PFNA与DHS手术方式都能取得良好的临床效果,对于髋关节不稳定的股骨粗隆间骨折,特别是PFNA组在手术时间,手术失血量及术后恢复上优于DHS组。展开更多
目的比较动力髋螺钉(dynamic hip screw,DHS)与股骨近端螺旋刀片抗旋髓内钉(proximal femoral nail antirotation,PFNA)治疗股骨粗隆间骨折的疗效。方法 60例股骨粗隆间骨折患者,分成DHS组和PFNA组。两组分别采用DHS内固定及PFNA内固定...目的比较动力髋螺钉(dynamic hip screw,DHS)与股骨近端螺旋刀片抗旋髓内钉(proximal femoral nail antirotation,PFNA)治疗股骨粗隆间骨折的疗效。方法 60例股骨粗隆间骨折患者,分成DHS组和PFNA组。两组分别采用DHS内固定及PFNA内固定。结果 60例患者骨折均骨性愈合。PFNA组优秀率83.33%,高于DHS组优秀率60.00%,差异具有显著性(P<0.05);PFNA组手术平均用时及术中出血量均少于DHS组,PFNA组未发现明显并发症。结论 PFNA内固定治疗股骨粗隆间骨折患者疗效佳,手术时间短,术中出血量少,而且也安全,值得临床进一步推广应用。展开更多
基金Capital’s Funds for Health Improvement and Research(No.2018-1-2072)。
文摘Objective:To compare the outcomes of dynamic hip screws(DHS)and intramedullary nailing(IMN)in the treatment of extra-capsular metastatic carcinoma of the proximal femur.Methods:A retrospective case analysis method was used to examine data of patients with proximal metastatic cancer of the femur who were treated with internal fixation in Department of Orthopaedics,Beijing Friendship Hospital,from January 2007 to December 2018.Blood loss,postoperative pain,functional score,length of stay,and survival rates were compared,and postoperative complications were assessed.Results:Complete follow-up data were available for 33 patients.The mean follow-up period was 12.2±3.6(range:9-32)months and the average age was 72.3±4.7(range:59-83)years old.There were 20 females and 13 males.Twenty-three patients had undergone IMN and 10 DHS,according to bone defects and the patient’s overall condition.The median survival time was 10 months in the IMN group and 11 months in the DHS group.Duration of surgery(t=-7.366,P<0.001)and length of hospital stay(t=-3.509,P<0.001)differed significantly between the two groups.There was one case of breakage of internal fixation in the IMN group.Conclusions:There was no significant difference between DHS and IMN in terms of surgical efficacy.IMN and DHS were different in terms of surgical time and hospital stay.However,due to the limited number of cases in this study,multi-factor analysis has not been performed and needs to be further verified in future analysis.When developing a surgical plan,it is recommended to consider the patient’s condition and the surgeon’s experience.
文摘Background: Internal fixation is appropriate for most intertrochanteric fractures. Optimal fixation is based on the stability of fracture. The mainstay of treatment of intertrochanteric fracture is fixation with a screw slide plate device or intramedullary device. So it is a matter of debate that which one is the best treatment, dynamic hip screw or proximal femoral nailing. Method: A prospective randomized and comparative study of 2 years duration was conducted on 60 patients admitted in the Department of Orthopedics in our hospital with intertrochanteric femur fracture. They were treated by a dynamic hip screw and proximal femoral nail. Patients were operated under image intensifier control. The parameters studied were functional outcome of Harris hip score, total duration of operation, rate of union, amount of collapse. These values were statistically evaluated and two tailed p-values were calculated and both groups were statistically compared. Result: The average age of our patient is 67.8 years. Among the fracture, 31% were stable, 58% were unstable, 11% were reverse oblique fracture. The average blood loss was 100 and 250 ml in PFN and DHS group, respectively. In PFN there was more no. of radiation exposure intraoperatively. The average operating time for the patients treated with PFN was 45 min as compared to 70 min in patients treated with DHS. The patients treated with PFN started early ambulation as they had better Harris Hip Score in the early period (at 1 and 3 months). In the long term both the implants had almost similar functional outcomes. Conclusion: In our study we have found that the unstable pattern was more common in old aged patients with higher grade of osteoporosis and PFN group has a better outcome in this unstable and osteoporotic fracture. PFN group has less blood loss and less operating time compared to DHS group. In PFN group patients have started early ambulation compared to DHS group.
基金Supported by Beijing Natural Science Foundation(Grant No.L172021)National Natural Science Foundation of China(Grant No.51875033).
文摘To assist an amputee in regaining his or her daily quality of life,based on analysis of the motion characteristics of the human hip,a 2-UPR/URR parallel mechanism with a passive limb was designed.The inverse kinematics of this mechanism was analyzed based on a closed-loop vector method.The constrained Jacobian matrix and kinematic Jacobian matrix of each limb were then analyzed,and a 6×6 fully Jacobian matrix was constructed.Based on this,kinematic performances were analyzed and summarized.Finally,the dynamic model of the mechanism was constructed based on the virtual work principle,and its theoretical solution was compared with the numerical results,which were obtained in a simulation environment.Results showed that the prosthetic mechanism had a larger rotating workspace and better mechanical performance,which accorded a range of motion and bearing capacity similar to that of the human hip in multiple gait modes.Moreover,the validity of the dynamic model and inverse kinematics were verified by comparing the theoretical and simulation results.Furthermore,with flexion and extension,the torque change in the hip prosthetic mechanism was similar to that of the human hip,which demonstrated the feasibility of the hip prosthetic mechanism and its good dynamic performance.
文摘目的:比较采用动力髋螺钉(dynamic hip screw,DHS)、Gamma钉和股骨近端髓内钉(proximal femoral nail,PFN)治疗老年股骨转子间骨折的术中情况、术后并发症及疗效。方法:2001年2月-2005年5月,分别采用DHS(DHS组,56例)、Gamma钉(Gamma钉组,20例)和PFN(PFN组,51例)治疗并随访老年股骨转子间骨折患者127例。比较3组患者手术情况、术后并发症及功能恢复情况。结果:各组间手术时间两两比较均有显著差异(P<0.01),DHS组最长,PFN组最短。Gamma钉组和PFN组术中出血量少于DHS组(P<0.01)。DHS组发生术后髋内翻、肢体短缩及并发症总数多于Gamma钉组和PFN组(P<0.01)。DHS组、Gamma钉组和PFN组优良率分别为82.14%、85.00%和90.20%,组间疗效差异不显著(P>0.05)。结论:应用DHS、Gamma钉和PFN治疗老年股骨转子间骨折,在疗效方面无明显差异。Gamma钉和PFN可缩短手术时间、减少术中出血量及术后并发症。
文摘目的分析动力髋螺钉(dynamic hip screw,DHS)和Gamma钉在老年股骨粗隆间骨折中的治疗选择和临床疗效。方法对70例老年股骨粗隆间骨折分别行手术治疗,其中DHS内固定49例,Gamma钉内固定21例。比较两组术中和术后多项相关指标(如手术时间、切口长度、术中出血量、术后引流量、X线暴露次数等),并行统计学分析。结果Gamma钉组与DHS组相比较术中出血量、切口长度差异均具有显著性(P<0.05);Gamma钉组与DHS组相比较在手术中X线暴露次数增多(P<0.05);而Gamma钉组与DHS组术后引流量、骨折愈合时间、手术时间比较差异无显著性(P>0.05)。结论只要适应证掌握得当,合理选择内固定,手术操作规范,DHS和Gamma钉治疗老年股骨粗隆间骨折均可以获得相同良好的临床效果,而Gamma钉手术创伤较小,更适用于高龄患者。
文摘目的:对比研究股骨近端抗旋转刀片髓内钉(proximal femoral nail antirotation,PFNA)与动力髋加压螺钉(dynamic hip screw,DHS)治疗老年股骨粗隆间骨折的临床疗效。方法:选取2010年4月-2012年7月于本院诊治的96例股骨粗隆间骨折并给予手术治疗的患者,根据手术方法不同分为PFNA组和DHS组,其中PFNA组58例,DHS组38例。分别对两组的患者术后临床疗效进行回顾性的分析与研究,术后临床疗效的评估采用Sander’s评分系统评价患者的髋关节及术后疗效。结果:PFNA组与DHS组治疗髋关节稳定型的股骨粗隆间骨折术后临床疗效优良率达到100%,术后疗效差异无统计学意义(P>0.05);对于不稳定的股骨粗隆间骨折,PFNA组的治疗疗效优于DHS组,两组比较差异有统计学意义(P<0.05)。结论:对于髋关节稳定的股骨粗隆间骨折,PFNA与DHS手术方式都能取得良好的临床效果,对于髋关节不稳定的股骨粗隆间骨折,特别是PFNA组在手术时间,手术失血量及术后恢复上优于DHS组。
文摘目的比较动力髋螺钉(dynamic hip screw,DHS)与股骨近端螺旋刀片抗旋髓内钉(proximal femoral nail antirotation,PFNA)治疗股骨粗隆间骨折的疗效。方法 60例股骨粗隆间骨折患者,分成DHS组和PFNA组。两组分别采用DHS内固定及PFNA内固定。结果 60例患者骨折均骨性愈合。PFNA组优秀率83.33%,高于DHS组优秀率60.00%,差异具有显著性(P<0.05);PFNA组手术平均用时及术中出血量均少于DHS组,PFNA组未发现明显并发症。结论 PFNA内固定治疗股骨粗隆间骨折患者疗效佳,手术时间短,术中出血量少,而且也安全,值得临床进一步推广应用。