Monteggia fracture-dislocation is a rare and complex injury that typically involves an ulnar fracture combined with a dislocation of the proximal radioulnar and radiocapitellar joints.Ulnar osteotomy is an effective t...Monteggia fracture-dislocation is a rare and complex injury that typically involves an ulnar fracture combined with a dislocation of the proximal radioulnar and radiocapitellar joints.Ulnar osteotomy is an effective treatment method.This article reports a case of chronic Monteggia fracture in an 11-year-old male patient successfully treated with a simple proximal ulnar osteotomy.展开更多
BACKGROUND Accurate surgical fixation of intra-articular distal humerus fractures require olecranon osteotomy.Repair of osteotomy is achieved with a variety of techniques but no consensus has been achieved regarding t...BACKGROUND Accurate surgical fixation of intra-articular distal humerus fractures require olecranon osteotomy.Repair of osteotomy is achieved with a variety of techniques but no consensus has been achieved regarding the optimum technique for fixing the olecranon osteotomy.In this retrospective study,we compared the functional and radiological outcome of the two commonly used techniques of fixing olecranon osteotomy after fixing distal humerus intra-articular fractures.We hypothesized that olecranon osteotomy fixed with 6.5 mm cancellous intramedullary screw alone yielded better radiological and functional outcome than fixation with cerclage wire over cancellous screw applied in figure of eight as tension band wiring(TBW).AIM To determine the radiological and functional outcome of olecranon osteotomy fixation with cancellous screw alone vs cancellous screw combined with cerclage wiring applied as TBW.METHODS This retrospective study was conducted in Lady Reading Hospital Peshawar Pakistan.Intra-articular distal humerus fractures fulfilling the inclusion criteria and operated during 2023 to 2025 were included.Olecranon osteotomy fixation with 6.5 mm cancellous screw alone was labelled as group A while cerclage wire over cancellous screw in figure of eight as TBW were labelled as group B.The demographics,radiological and functional outcome in both groups were compared at one year using Mayo Elbow Performance Score and Quick Disabilities of the Arm,Shoulder,and Hand Score.RESULTS We included 32 patients in this study.The mean age of group A patients was 34±5.5 years while group B had a mean age of 34±6.2 years.Radiological union of olecranon osteotomy was achieved in all cases in both groups.Functional outcome however was significantly better in group A than in group B(P<0.05).The Mayo Elbow Performance Score was excellent in 14(87.5%)and good in 2(12.5%)patients in group A while 7(43.47%)patients had excellent outcome,5(31.25%)good and 4(25%)had fair outcome in group B.The mean Quick Disabilities of the Arm,Shoulder,and Hand Score was 24.5±2.1 and 78.1±12.1 in group A and B respectively(P<0.05).CONCLUSION Similar radiological union was achieved in all patients of olecranon osteotomy treated with intramedullary screw alone and intramedullary screw with TBW.Functional outcome however was significantly better in intramedullary screw alone than in intramedullary screw with TBW.展开更多
To address the challenges of high energy consumption and prominent costs in the traditional three-columns distillation process for cellulosic fuel ethanol,a distillation–molecular sieve coupling separation process is...To address the challenges of high energy consumption and prominent costs in the traditional three-columns distillation process for cellulosic fuel ethanol,a distillation–molecular sieve coupling separation process is proposed.This process integrates a three-column(crude distillation column,first distillation column,second distillation column)system with a 3A molecular sieve adsorption deep dehydration unit.A thermal coupling network is constructed via differential pressure design(steam from medium/high-pressure columns as mutual heat sources,reboiler liquid waste heat for feed preheating),and molecular sieve adsorption conditions are optimized.The study first performs a thermodynamic consistency test on the ethanol–water system,determines optimal non-random two-liquid(NRTL)model binary interaction parameters via experimental data regression for Aspen Plus simulation.Aiming at minimum total annual cost(TAC),Aspen Plus is used to optimize process parameters(theoretical tray number,feed location,reflux ratio,side-draw position,etc.).Economic analysis shows this process reduces CO_(2) emission costs by 27.56%,TAC by 15.58%(to 5.123×10^(6) USD·a^(−1)),and increases ethanol purity to>99.6%,providing an effective solution for green,efficient separation.展开更多
A wide variety of pelvic osteotomies have been developed for the treatment of developmental dysplasia of the hip(DDH). In the present paper, we present a detailed review of previous studies of triple osteotomy as an a...A wide variety of pelvic osteotomies have been developed for the treatment of developmental dysplasia of the hip(DDH). In the present paper, we present a detailed review of previous studies of triple osteotomy as an alternative treatment for DDH. We also report our experience treating 6 adult cases of DDH by triple osteotomy in order to highlight the various aspects of this procedure.The mean age of our patients was 31.2 years with a mean follow-up period of 6 years. We assessed range of motion, center-edge angle, acetabular index angle, Sharp angle, acetabulum head index, head lateralization index, Japanese Orthopedic Association score, Harris hip score, patient satisfaction, and the difference between lower limb lengths before and after the procedure. At final follow-up, clinical scores were significantly improved and radiographic parameters also showed good correction of acetabulum.展开更多
文摘Monteggia fracture-dislocation is a rare and complex injury that typically involves an ulnar fracture combined with a dislocation of the proximal radioulnar and radiocapitellar joints.Ulnar osteotomy is an effective treatment method.This article reports a case of chronic Monteggia fracture in an 11-year-old male patient successfully treated with a simple proximal ulnar osteotomy.
文摘BACKGROUND Accurate surgical fixation of intra-articular distal humerus fractures require olecranon osteotomy.Repair of osteotomy is achieved with a variety of techniques but no consensus has been achieved regarding the optimum technique for fixing the olecranon osteotomy.In this retrospective study,we compared the functional and radiological outcome of the two commonly used techniques of fixing olecranon osteotomy after fixing distal humerus intra-articular fractures.We hypothesized that olecranon osteotomy fixed with 6.5 mm cancellous intramedullary screw alone yielded better radiological and functional outcome than fixation with cerclage wire over cancellous screw applied in figure of eight as tension band wiring(TBW).AIM To determine the radiological and functional outcome of olecranon osteotomy fixation with cancellous screw alone vs cancellous screw combined with cerclage wiring applied as TBW.METHODS This retrospective study was conducted in Lady Reading Hospital Peshawar Pakistan.Intra-articular distal humerus fractures fulfilling the inclusion criteria and operated during 2023 to 2025 were included.Olecranon osteotomy fixation with 6.5 mm cancellous screw alone was labelled as group A while cerclage wire over cancellous screw in figure of eight as TBW were labelled as group B.The demographics,radiological and functional outcome in both groups were compared at one year using Mayo Elbow Performance Score and Quick Disabilities of the Arm,Shoulder,and Hand Score.RESULTS We included 32 patients in this study.The mean age of group A patients was 34±5.5 years while group B had a mean age of 34±6.2 years.Radiological union of olecranon osteotomy was achieved in all cases in both groups.Functional outcome however was significantly better in group A than in group B(P<0.05).The Mayo Elbow Performance Score was excellent in 14(87.5%)and good in 2(12.5%)patients in group A while 7(43.47%)patients had excellent outcome,5(31.25%)good and 4(25%)had fair outcome in group B.The mean Quick Disabilities of the Arm,Shoulder,and Hand Score was 24.5±2.1 and 78.1±12.1 in group A and B respectively(P<0.05).CONCLUSION Similar radiological union was achieved in all patients of olecranon osteotomy treated with intramedullary screw alone and intramedullary screw with TBW.Functional outcome however was significantly better in intramedullary screw alone than in intramedullary screw with TBW.
文摘目的:评估术前牵引对截骨等级的影响,并比较Halo-重力牵引(halo-gravity traction,HGT)和Halo-骨盆牵引(halo-pelvic traction,HPT)在重度脊柱畸形治疗中的疗效差异。方法:回顾性分析2008年8月~2019年11月期间在中山大学附属第三医院接受术前牵引联合后路脊柱截骨融合手术的60例重度脊柱畸形患者的临床资料,其中男性22例,女性38例,年龄8~33岁(19.8±5.9岁),根据术前牵引方式分为HGT组(37例)与HPT(23例)组。分别于牵引前、牵引结束时及术后48个月的脊柱全长X线片上测量矢状面和冠状面Cobb角,并根据节段数计算矢状面畸形角比率(sagittal deformity angular ratio,SDAR)及后凸矫正率,通过截骨等级预测模型评估牵引前后截骨等级变化,并采用逆概率加权(inverse probability of treatment weighting,IPTW)比较两种牵引方式对截骨等级及矫形效果的影响。结果:60例患者均顺利完成治疗,牵引前患者矢状面后凸Cobb角为131.82°±30.29°,冠状面Cobb角为132.70°±28.77°,预测截骨等级为5.10±0.92;牵引结束时,矢状面后凸Cobb角为97.56°±33.54°,冠状面Cobb角为100.93°±30.93°,预测截骨等级为4.14±1.20,较牵引前显著降低(P<0.001),实际截骨等级为4.34±0.98,也较牵引前显著降低(P<0.001)。经IPTW校正后,HGT组矢状面Cobb角由牵引前的133.48°±23.68°降至牵引后111.23°±29.35°,HPT组则由134.96°±40.89°降至75.07°±25.49°。两种牵引方式在降低截骨等级方面无统计学差异(P>0.05),但HPT在改善SDAR方面更具优势(P=0.014),且后凸矫正率优于HGT(P<0.001)。结论:术前HGT和HPT均可有效降低重度脊柱畸形患者所需截骨等级;HPT在改善矢状面畸形相关指标及后凸矫正率方面更具优势。
基金support from the National Key Research and Development Program of China(2022YFC2106300)the National Natural Science Foundation of China(42177400).
文摘To address the challenges of high energy consumption and prominent costs in the traditional three-columns distillation process for cellulosic fuel ethanol,a distillation–molecular sieve coupling separation process is proposed.This process integrates a three-column(crude distillation column,first distillation column,second distillation column)system with a 3A molecular sieve adsorption deep dehydration unit.A thermal coupling network is constructed via differential pressure design(steam from medium/high-pressure columns as mutual heat sources,reboiler liquid waste heat for feed preheating),and molecular sieve adsorption conditions are optimized.The study first performs a thermodynamic consistency test on the ethanol–water system,determines optimal non-random two-liquid(NRTL)model binary interaction parameters via experimental data regression for Aspen Plus simulation.Aiming at minimum total annual cost(TAC),Aspen Plus is used to optimize process parameters(theoretical tray number,feed location,reflux ratio,side-draw position,etc.).Economic analysis shows this process reduces CO_(2) emission costs by 27.56%,TAC by 15.58%(to 5.123×10^(6) USD·a^(−1)),and increases ethanol purity to>99.6%,providing an effective solution for green,efficient separation.
文摘A wide variety of pelvic osteotomies have been developed for the treatment of developmental dysplasia of the hip(DDH). In the present paper, we present a detailed review of previous studies of triple osteotomy as an alternative treatment for DDH. We also report our experience treating 6 adult cases of DDH by triple osteotomy in order to highlight the various aspects of this procedure.The mean age of our patients was 31.2 years with a mean follow-up period of 6 years. We assessed range of motion, center-edge angle, acetabular index angle, Sharp angle, acetabulum head index, head lateralization index, Japanese Orthopedic Association score, Harris hip score, patient satisfaction, and the difference between lower limb lengths before and after the procedure. At final follow-up, clinical scores were significantly improved and radiographic parameters also showed good correction of acetabulum.
