Introduction: Total hip arthroplasty of complex morphology is a challenge for the orthopaedic surgeon. Careful analysis of the hip’s anatomy helps to unravel the difficulties and anticipate the procedures to be perfo...Introduction: Total hip arthroplasty of complex morphology is a challenge for the orthopaedic surgeon. Careful analysis of the hip’s anatomy helps to unravel the difficulties and anticipate the procedures to be performed and the implants to be planned. The aim was to identify the types of hip that make first-line THR difficult, specify the technical procedures to be used on these sites, and assess the functional results of the series. Material and Methods: This was a retrospective study that concerned patients operated on for total hip arthroplasty between January 2015 and December 2022 at the medical center “La Grâce” in Bobo-Dioulasso, Burkina Faso. Patients with coxarthrosis (on hip dysplasia, acetabular protrusio, acetabular malunion or neurological hip) and those with ankylosis of the hip, osteonecrosis secondary to neglected dislocation of the hip or hemoglobinopathy were included. Results: A total of 31 total hip replacements were performed in 30 patients. The mean age of patients at the surgery time was 36.2 years with extremes of 17 and 61 years. The male-to-female sex ratio was 1. The main indications for THA were the dysplasic hip osteoarthritis (11 cases) and the neglected hip dislocations (7 cases). In situ femoral neck osteotomy before hip dislocation was performed in seven cases. The acetabulum reconstruction techniques varied from the structural iliac bone graft (n = 3) and cancellous bone graft (n = 4) to the Kerboull plate (n = 1). After 45 months of mean follow-up, all hips were evaluated. The mean PMA score increased from 7.1 [4 - 8] before the surgery to 13.2 [13 - 17]. Conclusion: The large spectrum of challenges in complex hip management requires effective preoperative planning. Preoperative planning minimizes complications and ensures a better outcome.展开更多
以某采用吸附法模拟移动床技术新建的单系列1.5 Mt a对二甲苯芳烃联合装置(其公用工程依托企业原有设施)为举例装置,针对全厂事故停电时,原有火炬系统的接收能力仅有500 t h,不能满足需求的问题,分别对装置中二甲苯塔、抽出液塔、重整...以某采用吸附法模拟移动床技术新建的单系列1.5 Mt a对二甲苯芳烃联合装置(其公用工程依托企业原有设施)为举例装置,针对全厂事故停电时,原有火炬系统的接收能力仅有500 t h,不能满足需求的问题,分别对装置中二甲苯塔、抽出液塔、重整油分馏塔实施高完整性保护系统(HIPS)措施,并对抽余液塔采用夹点设计优化,从而大幅度降低装置的火炬排放量。结果表明,应用HIPS和夹点技术后,装置火炬排放量从常规时的3790 t h降低到438 t h,满足了项目全厂事故停电时的火炬排放要求。展开更多
文摘Introduction: Total hip arthroplasty of complex morphology is a challenge for the orthopaedic surgeon. Careful analysis of the hip’s anatomy helps to unravel the difficulties and anticipate the procedures to be performed and the implants to be planned. The aim was to identify the types of hip that make first-line THR difficult, specify the technical procedures to be used on these sites, and assess the functional results of the series. Material and Methods: This was a retrospective study that concerned patients operated on for total hip arthroplasty between January 2015 and December 2022 at the medical center “La Grâce” in Bobo-Dioulasso, Burkina Faso. Patients with coxarthrosis (on hip dysplasia, acetabular protrusio, acetabular malunion or neurological hip) and those with ankylosis of the hip, osteonecrosis secondary to neglected dislocation of the hip or hemoglobinopathy were included. Results: A total of 31 total hip replacements were performed in 30 patients. The mean age of patients at the surgery time was 36.2 years with extremes of 17 and 61 years. The male-to-female sex ratio was 1. The main indications for THA were the dysplasic hip osteoarthritis (11 cases) and the neglected hip dislocations (7 cases). In situ femoral neck osteotomy before hip dislocation was performed in seven cases. The acetabulum reconstruction techniques varied from the structural iliac bone graft (n = 3) and cancellous bone graft (n = 4) to the Kerboull plate (n = 1). After 45 months of mean follow-up, all hips were evaluated. The mean PMA score increased from 7.1 [4 - 8] before the surgery to 13.2 [13 - 17]. Conclusion: The large spectrum of challenges in complex hip management requires effective preoperative planning. Preoperative planning minimizes complications and ensures a better outcome.
文摘以某采用吸附法模拟移动床技术新建的单系列1.5 Mt a对二甲苯芳烃联合装置(其公用工程依托企业原有设施)为举例装置,针对全厂事故停电时,原有火炬系统的接收能力仅有500 t h,不能满足需求的问题,分别对装置中二甲苯塔、抽出液塔、重整油分馏塔实施高完整性保护系统(HIPS)措施,并对抽余液塔采用夹点设计优化,从而大幅度降低装置的火炬排放量。结果表明,应用HIPS和夹点技术后,装置火炬排放量从常规时的3790 t h降低到438 t h,满足了项目全厂事故停电时的火炬排放要求。
