目的:比较经跖骨间切口与内侧切口外侧软组织松解联合Scarf截骨治疗中重度拇外翻(hallux valgus,HV)的临床疗效。方法:回顾性分析2022年1月至2022年12月收治的42例中重度HV患者的临床资料,根据切口不同分为内侧切口组22例(22足)和经跖...目的:比较经跖骨间切口与内侧切口外侧软组织松解联合Scarf截骨治疗中重度拇外翻(hallux valgus,HV)的临床疗效。方法:回顾性分析2022年1月至2022年12月收治的42例中重度HV患者的临床资料,根据切口不同分为内侧切口组22例(22足)和经跖骨间切口组20例(20足)。内侧切口组男3例,女19例;年龄40~69(55.0±11.4)岁;身体质量指数(body mass index,BMI)为21~29(25.2±2.1)kg·m^(-2);病程8~16(12.0±2.2)年;中度畸形11例,重度畸形11例。经跖间切口组男3例,女17例;年龄39~68(53.0±7.5)岁;BMI为20~28(24.8±1.9)kg·m^(-2);病程9~17(14.0±3.1)年;中度畸形9例,重度畸形11例。观察并比较两组术前及术后12个月拇外翻角(hallux valgus angle,HVA)、第1-2跖间角(intermetatarsal angle,IMA)、美国足踝外科协会(American Orthopaedic Foot and Ankle Society,AOFAS)前足评分和并发症发生情况。结果:所有患者顺利完成手术,并获得随访,时间12~15(13.52±1.65)个月。两组术前及术后12个月HVA、IMA比较,差异均无统计学意义(P>0.05)。内侧切口组术前及术后12个月AOFAS前足评分分别为(45.0±6.8)、(86.0±6.7)分,经跖骨间切口组分别为(46.0±7.4)、(83.0±7.5)分;两组术后12个月AOFAS前足评分与术前比较,差异有统计学意义(P<0.01);其中内侧切口组AOFAS前足评分优8例,良14例;经跖间切口组优6例,良14例。术后12个月,内侧切口组AOFAS前足评分中功能评分(38.0±2.5)分优于经跖间切口组(34.0±2.2)分,差异有统计学意义(P<0.05)。内侧切口组术后HV畸形复发1足,经跖间切口组3趾出现轻微麻木感,3例对瘢痕不满意。两组均未出现感染、骨不连或跖骨头缺血性坏死并发症。结论:经跖骨间切口与内侧切口外侧软组织松解联合Scarf截骨均可有效治疗中重度HV,内侧切口术后功能恢复优于经跖骨间切口。展开更多
The flow field and aerodynamic performances for the scarfed lobed forced mixer are studied based on a computational fluid dynamics（CFD） technique. A series of computations are conducted to obtain the effects of the ...The flow field and aerodynamic performances for the scarfed lobed forced mixer are studied based on a computational fluid dynamics（CFD） technique. A series of computations are conducted to obtain the effects of the bypass ratio and the scarf angle on the mixing performance for the scarfed lobed mixer. Results show that the scarfed lobed mixer is reduced in the system weight. Meanwhile, aerodynamic performances are slightly improved compared with the normal lobed mixer. Two reasons for causing the mixing enhancement between the core and the bypass flow are as follows： （1） The stream-wise vortices shed from the training edge of the half/full scarfed lobed mixer earlier is enhanced by about 25%. （2） The mixing augmentation is also associated with the increase of the interface length caused by scarfing. The thermal mixing efficiency is enhanced with the increase of the bypass ratio and the scarfing angle. The scarfed lobed mixer design has no negative effects on the pressure loss. The total pressure recovery coefficient reaches above 0. 935 in various bypass ratios and scarfed angles. As the bypass ratio increases, the total pressure recovery coefficient also increases for the scarfed lobed mixer.展开更多
文摘目的:比较经跖骨间切口与内侧切口外侧软组织松解联合Scarf截骨治疗中重度拇外翻(hallux valgus,HV)的临床疗效。方法:回顾性分析2022年1月至2022年12月收治的42例中重度HV患者的临床资料,根据切口不同分为内侧切口组22例(22足)和经跖骨间切口组20例(20足)。内侧切口组男3例,女19例;年龄40~69(55.0±11.4)岁;身体质量指数(body mass index,BMI)为21~29(25.2±2.1)kg·m^(-2);病程8~16(12.0±2.2)年;中度畸形11例,重度畸形11例。经跖间切口组男3例,女17例;年龄39~68(53.0±7.5)岁;BMI为20~28(24.8±1.9)kg·m^(-2);病程9~17(14.0±3.1)年;中度畸形9例,重度畸形11例。观察并比较两组术前及术后12个月拇外翻角(hallux valgus angle,HVA)、第1-2跖间角(intermetatarsal angle,IMA)、美国足踝外科协会(American Orthopaedic Foot and Ankle Society,AOFAS)前足评分和并发症发生情况。结果:所有患者顺利完成手术,并获得随访,时间12~15(13.52±1.65)个月。两组术前及术后12个月HVA、IMA比较,差异均无统计学意义(P>0.05)。内侧切口组术前及术后12个月AOFAS前足评分分别为(45.0±6.8)、(86.0±6.7)分,经跖骨间切口组分别为(46.0±7.4)、(83.0±7.5)分;两组术后12个月AOFAS前足评分与术前比较,差异有统计学意义(P<0.01);其中内侧切口组AOFAS前足评分优8例,良14例;经跖间切口组优6例,良14例。术后12个月,内侧切口组AOFAS前足评分中功能评分(38.0±2.5)分优于经跖间切口组(34.0±2.2)分,差异有统计学意义(P<0.05)。内侧切口组术后HV畸形复发1足,经跖间切口组3趾出现轻微麻木感,3例对瘢痕不满意。两组均未出现感染、骨不连或跖骨头缺血性坏死并发症。结论:经跖骨间切口与内侧切口外侧软组织松解联合Scarf截骨均可有效治疗中重度HV,内侧切口术后功能恢复优于经跖骨间切口。
基金Supported by the Civil Aviation Research Foundation of Nanjing University of Aeronautics and Astronautics~~
文摘The flow field and aerodynamic performances for the scarfed lobed forced mixer are studied based on a computational fluid dynamics（CFD） technique. A series of computations are conducted to obtain the effects of the bypass ratio and the scarf angle on the mixing performance for the scarfed lobed mixer. Results show that the scarfed lobed mixer is reduced in the system weight. Meanwhile, aerodynamic performances are slightly improved compared with the normal lobed mixer. Two reasons for causing the mixing enhancement between the core and the bypass flow are as follows： （1） The stream-wise vortices shed from the training edge of the half/full scarfed lobed mixer earlier is enhanced by about 25%. （2） The mixing augmentation is also associated with the increase of the interface length caused by scarfing. The thermal mixing efficiency is enhanced with the increase of the bypass ratio and the scarfing angle. The scarfed lobed mixer design has no negative effects on the pressure loss. The total pressure recovery coefficient reaches above 0. 935 in various bypass ratios and scarfed angles. As the bypass ratio increases, the total pressure recovery coefficient also increases for the scarfed lobed mixer.
