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
Introduction: Standard procedures for surgical fixation of proximal femoral fractures (PFF) require an image intensifier which in developing countries remains a luxury. We hypothesized that, with a well-codified techn...Introduction: Standard procedures for surgical fixation of proximal femoral fractures (PFF) require an image intensifier which in developing countries remains a luxury. We hypothesized that, with a well-codified technique, the Watson Jones approach (WJA) without image intensifier nor traction table, can allow open reduction and internal fixation (ORIF) of PFF using Dynamic hip screw (DHS), with satisfactory outcome. Patients and methods: Forty one consecutive patients (mean age 59.5 ± 21.6 years, 61% males) who were followed in a Teaching Hospital for PFF treated by ORIF using the WJA and DHS from January 2016 to December 2020 were reassessed. The outcome measures were the quality of the reduction, the positioning of the implants, the tip-apex distance (TAD), the rate and delay of consolidation, the functional results using Postel Merle d’Aubigné (PMA) score, the rate of surgical site infection (SSI) and the overall mortality. Logistic regression was used to determine factors associated with mechanical failure. Results: The mean follow-up period was 33.8 ± 15.0 months. Fracture reduction was good in 31 (75.6%) cases and acceptable in 8(19.5%) cases. Implant position was fair to good in 37 (90.2%) patients. The mean TAD was 26.1 ± 3.9 mm. Three patients developed SSI. Consolidation was achieved in 38 (92.6%) patients. The functional results were good to excellent in 80.5% of patients. The overall mortality rate was 7.3%. There were an association between mechanical failure and osteoporosis (p = 0.04), fracture reduction (p = 0.003), and TAD (p = 0.025). In multivariate logistic regression, no independent factors were predictive of mechanical failure. Conclusion: This study shows that ORIF using DHS for PFF via the Watson-Jones approach without an image intensifier can give satisfactory anatomical and functional outcomes in low-resource settings. It provides and validates a reliable and reproducible technique that deserves to be diffused to surgeons in austere areas over the world.展开更多
目的:比较股骨近端髓内钉(proximal femoral nail antirotation,PFNA)与动力髋螺钉(dynamic hip screw,DHS)对老年不稳定型股骨粗隆间骨折患者术后疼痛应激、骨代谢、凝血指标的影响。方法:选取2019年1月至2020年12月衡水市第四人民医...目的:比较股骨近端髓内钉(proximal femoral nail antirotation,PFNA)与动力髋螺钉(dynamic hip screw,DHS)对老年不稳定型股骨粗隆间骨折患者术后疼痛应激、骨代谢、凝血指标的影响。方法:选取2019年1月至2020年12月衡水市第四人民医院骨科收治的240例老年不稳定型股骨粗隆间骨折患者作为研究对象,根据手术方法分为DHS组(n=124)与PFNA组(n=116)。比较2组患者的手术指标、疗效指标。对2组患者术前和术后24 h的视觉模拟评分法(Visual Analogue Scale,VAS)评分及血清前列腺素E_(2)(prostaglandin E_(2),PGE_(2))、P物质(substance P,SP)、5-羟色胺(5-hydroxy tryptamine,5-HT)、去甲肾上腺素(norepinephrine,NE)及血管紧张素II(angiotensin II,AngII)水平进行比较。对2组患者术前和术后3个月的血浆甲状旁腺素(parathyroid hormone,PTH)、骨钙素(osteocalcin,BGP)、骨碱性磷酸酶(bone alkaline phosphatase,BALP)、I型前胶原氨基端前肽(procollagen type I Nterminal propeptide,PINP)、I型前胶原羟基端肽(propeptide of type I procollagen,PICP)、I型胶原羧基端肽β特殊序列(beta C-terminal cross-linked telopeptides of type I collagen,β-CTX)、25-二羟维生素D3[25-dihydroxyvitamin D3,25-(OH)2D3]、纤维蛋白原(fibrinogen,FBG)、D-二聚体水平及凝血活酶时间(prothrombin time,PT)、活化部分凝血活酶时间(activated partial thromboplastin time,APTT)进行比较。结果:PFNA组患者的手术时间、术中出血量、骨折愈合时间均低于DHS组,差异均有统计学意义(均P<0.05)。PFNA组患者术后6个月的Harris评分高于DHS组,差异有统计学意义(P<0.05)。PFNA组患者术后24 h的VAS评分、血清PGE_(2)、SP、5-HT、NE、AngII水平均低于DHS组,差异均有统计学意义(均P<0.05)。PFNA组患者术后3个月的血浆PTH、25-(OH)2D3、BGP、BALP、PINP、PICP水平均高于DHS组,血浆β-CTX、FBG、D-二聚体水平及PT、APTT均低于DHS组,差异均有统计学意义(均P<0.05)。结论:在老年不稳定型股骨粗隆间骨折的内固定手术治疗中,与DHS比较,PFNA在提升疗效、减少手术创伤、减轻术后疼痛应激、改善骨代谢指标和凝血功能指标方面具有更好的效果,临床医师应根据患者实际情况合理选择术式,以达到改善患者预后、减少并发症的目的。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Introduction: Standard procedures for surgical fixation of proximal femoral fractures (PFF) require an image intensifier which in developing countries remains a luxury. We hypothesized that, with a well-codified technique, the Watson Jones approach (WJA) without image intensifier nor traction table, can allow open reduction and internal fixation (ORIF) of PFF using Dynamic hip screw (DHS), with satisfactory outcome. Patients and methods: Forty one consecutive patients (mean age 59.5 ± 21.6 years, 61% males) who were followed in a Teaching Hospital for PFF treated by ORIF using the WJA and DHS from January 2016 to December 2020 were reassessed. The outcome measures were the quality of the reduction, the positioning of the implants, the tip-apex distance (TAD), the rate and delay of consolidation, the functional results using Postel Merle d’Aubigné (PMA) score, the rate of surgical site infection (SSI) and the overall mortality. Logistic regression was used to determine factors associated with mechanical failure. Results: The mean follow-up period was 33.8 ± 15.0 months. Fracture reduction was good in 31 (75.6%) cases and acceptable in 8(19.5%) cases. Implant position was fair to good in 37 (90.2%) patients. The mean TAD was 26.1 ± 3.9 mm. Three patients developed SSI. Consolidation was achieved in 38 (92.6%) patients. The functional results were good to excellent in 80.5% of patients. The overall mortality rate was 7.3%. There were an association between mechanical failure and osteoporosis (p = 0.04), fracture reduction (p = 0.003), and TAD (p = 0.025). In multivariate logistic regression, no independent factors were predictive of mechanical failure. Conclusion: This study shows that ORIF using DHS for PFF via the Watson-Jones approach without an image intensifier can give satisfactory anatomical and functional outcomes in low-resource settings. It provides and validates a reliable and reproducible technique that deserves to be diffused to surgeons in austere areas over the world.
文摘目的:比较股骨近端髓内钉(proximal femoral nail antirotation,PFNA)与动力髋螺钉(dynamic hip screw,DHS)对老年不稳定型股骨粗隆间骨折患者术后疼痛应激、骨代谢、凝血指标的影响。方法:选取2019年1月至2020年12月衡水市第四人民医院骨科收治的240例老年不稳定型股骨粗隆间骨折患者作为研究对象,根据手术方法分为DHS组(n=124)与PFNA组(n=116)。比较2组患者的手术指标、疗效指标。对2组患者术前和术后24 h的视觉模拟评分法(Visual Analogue Scale,VAS)评分及血清前列腺素E_(2)(prostaglandin E_(2),PGE_(2))、P物质(substance P,SP)、5-羟色胺(5-hydroxy tryptamine,5-HT)、去甲肾上腺素(norepinephrine,NE)及血管紧张素II(angiotensin II,AngII)水平进行比较。对2组患者术前和术后3个月的血浆甲状旁腺素(parathyroid hormone,PTH)、骨钙素(osteocalcin,BGP)、骨碱性磷酸酶(bone alkaline phosphatase,BALP)、I型前胶原氨基端前肽(procollagen type I Nterminal propeptide,PINP)、I型前胶原羟基端肽(propeptide of type I procollagen,PICP)、I型胶原羧基端肽β特殊序列(beta C-terminal cross-linked telopeptides of type I collagen,β-CTX)、25-二羟维生素D3[25-dihydroxyvitamin D3,25-(OH)2D3]、纤维蛋白原(fibrinogen,FBG)、D-二聚体水平及凝血活酶时间(prothrombin time,PT)、活化部分凝血活酶时间(activated partial thromboplastin time,APTT)进行比较。结果:PFNA组患者的手术时间、术中出血量、骨折愈合时间均低于DHS组,差异均有统计学意义(均P<0.05)。PFNA组患者术后6个月的Harris评分高于DHS组,差异有统计学意义(P<0.05)。PFNA组患者术后24 h的VAS评分、血清PGE_(2)、SP、5-HT、NE、AngII水平均低于DHS组,差异均有统计学意义(均P<0.05)。PFNA组患者术后3个月的血浆PTH、25-(OH)2D3、BGP、BALP、PINP、PICP水平均高于DHS组,血浆β-CTX、FBG、D-二聚体水平及PT、APTT均低于DHS组,差异均有统计学意义(均P<0.05)。结论:在老年不稳定型股骨粗隆间骨折的内固定手术治疗中,与DHS比较,PFNA在提升疗效、减少手术创伤、减轻术后疼痛应激、改善骨代谢指标和凝血功能指标方面具有更好的效果,临床医师应根据患者实际情况合理选择术式,以达到改善患者预后、减少并发症的目的。
