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11.
目的 探讨膝内侧髌股韧带(MPFL)重建术中股骨隧道定位变化对移植物等距特性的影响。方法 取10具正常成年人新鲜膝关节标本,分辨出MPFL股骨端及髌骨端止点中心O,分别在股骨止点上取收肌结节中点(A)、股骨止点的近点(B)、中点(C)、远点(D)以及股骨内上髁中点(E)5个测试点,测量膝关节屈曲0°、30°、60°、90° 、120°时各测试点长度的变化。结果 比较各测试点的长度变化发现,其中收肌结节(A)、股骨止点的近点(B)这两点长度变化较小,且最大值均不超过3 mm。其中对AO和BO进行两两比较,发现无显著性差异(P>0.05)。结论 在MPFL重建时应尽量以其股骨端止点的上缘(即近点)为中心建立隧道,根据需要可适当向收肌结节侧偏移。 相似文献
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目的 研究满足日常生活活动范围条件下,全髋关节假体安装参数优化组合及髋臼安装角度安全范围.方法 建立人工全髋关节三维可视化计算机模型,将髋关节屈曲≥110°、屈曲90°内旋≥30°、后伸≥30°、外旋≥40°定义为日常生活活动范围一般标准;将屈曲≥120°、屈曲90°内旋≥45°、后伸≥30°、外旋≥40°定义为严格标准,头颈直径比变化范围为2~2.92,假体颈前倾角变化范围为0°~30°,髋臼假体外展角变化范围为10°~60°,髋臼前倾角变化范围为0°~70°,计算满足上述两种活动标准,臼杯外展角每变化5°,相应的髋臼假体前倾角,颈干角设定为135°.髋臼前倾角和外展角组合的安全范围定义为满足上述活动范围而没有杯颈撞击的面积.应用SAS6.12统计软件对数据进行分析.结果 髋臼角度安全范围随着头颈比增大而增大;严格标准下的安全范围比一般标准的小.颈干角135°、一般标准活动度,髋臼前倾角平均值与外展角的和加0.816倍颈前倾角等于84.76°;严格标准活动度,髋臼前倾角平均值与外展角的和加0.873倍颈前倾角等于92.04°.结论 大的头颈直径比明显增大髋臼角安全范围的面积.髋关节活动范围要求越高,髋臼角安全范围就越小,但可以通过增大头颈比来纠正.一般标准和严格标准活动度,髋臼前倾角平均值与外展角的和(Y)与颈前倾角(X)的组合分别可通过公式进行估计:Y1=-0.816X1+84.76(R2=0.993),Y2=-0.873X2 +92.04(R2=0.999). 相似文献
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腕掌侧严重切割伤的修复及远期疗效 总被引:5,自引:1,他引:4
目的探讨修复腕掌侧严重切割伤的特点和疗效。方法分析1991年9月~1996年10月收治的腕掌侧严重切割伤46例的处理方法及其远期疗效。结果共随访到28例,随访时间为术后9个月至5年。肌腱效果按TAM评定标准,优良率达85.7%;神经功能按李贵存等[2]评定标准,优良率达81.0%。结论腕外侧严重切割伤应重视早期同时修复神经、血管和肌腱;腱旁膜的修复是促进肌腱愈合的有效措施,显微外科技术的应用和早期功能训练是提高疗效的关键 相似文献
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四肢骨折脱位合并血管损伤的治疗 总被引:2,自引:1,他引:1
四肢主要动脉损伤在各种创伤病例中有上升的趋势 ,且其后果严重。如能早期诊断 ,及时妥善处理 ,则可使受伤肢体获得挽救。 6年中我院共收治 76例四肢骨折脱位合并血管损伤病人 ,效果满意。报告如下。1 临床资料本组 76例 (95条血管 ) ,男 6 0例 ,女 16例 ;年龄 8~ 70岁 ,平均 2 8岁。损伤类型 :锐性损伤 2 9例 ,钝性损伤 47例 ;栓塞 16例 ,部分断裂 4例 ,完全性断裂 5 6例 ;开放性损伤 5 8例 ,闭合性损伤 18例。血管损伤分布 :尺桡动脉 2 1条 ,肱动脉 13条 ,腋动脉 5条 ,股动脉 17条 ,动脉 2 8条 ,胫前后动脉 11条 ,主要伴行静脉损伤 39… 相似文献
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Objective: To study the influences of head/neck ratio and femoral antetorsion on the safe-zone of operative acetabular orientations, which meets the criteria for desired range of motion (ROM) for activities of daily living in total hip arthroplasty (THA).
Methods: A three-dimensional generic, parametric and kinematic simulation module of THA was developed to analyze the cup safe-zone and the optimum combination of cup and neck antetorsion. A ROM of flexion ≥ 120°, internal rotation ≥ 45° at 90° flexion, extension ≥ 30° and external rotation ≥ 40° was defined as the criteria for desired ROM for activities of daily living. The cup safe-zone was defined as the area that fulfills all the criteria of desired ROM before the neck impinged on the liner of the cup. For a fixed stemneck (CCD)-angle of 130°, theoretical safe-zones fulfilling the desired ROM were investigated at different general headneck ratios (GR=2, 2.17, 2.37, 2.61 and 2.92) and femoral anteversions (FA=0°, 10°, 20° and 30°).
Results: Large GRs greatly increased the size of safezones and when the CCD-angle was 130°, a GR〉2.37 could further increase the size of safe-zones. There was a complexinterplay between the orientation angles of the femoral and acetabular components. When the CCD-angle was 130°, the optimum relationship between operative acetabular anteversion (OA) and femoral antetorsion (FA) could be estimated by the formula: OA=-0.80×FA+47.06, and the minimum allowable operative acetabular inclination (OImin) would be more than 2 10.5 ×GR^-2255.
Conclusions: Large GRs greatly increase the size of safe-zones and it is recommended that the GR be more than 2.37 so as to extend the acceptable range of error that surgeons cannot avoid completely during operation. As to the optimum operative acetabular inclination (OI), surgeons need to make a decision combining with other factors, including stress distribution, soft tissue and cup wear conditions, as well as patients' individual situations and demands. The data obtained from this study and the module of THA can be used to assist surgeons to choose and implant appropriate implants. 相似文献
Methods: A three-dimensional generic, parametric and kinematic simulation module of THA was developed to analyze the cup safe-zone and the optimum combination of cup and neck antetorsion. A ROM of flexion ≥ 120°, internal rotation ≥ 45° at 90° flexion, extension ≥ 30° and external rotation ≥ 40° was defined as the criteria for desired ROM for activities of daily living. The cup safe-zone was defined as the area that fulfills all the criteria of desired ROM before the neck impinged on the liner of the cup. For a fixed stemneck (CCD)-angle of 130°, theoretical safe-zones fulfilling the desired ROM were investigated at different general headneck ratios (GR=2, 2.17, 2.37, 2.61 and 2.92) and femoral anteversions (FA=0°, 10°, 20° and 30°).
Results: Large GRs greatly increased the size of safezones and when the CCD-angle was 130°, a GR〉2.37 could further increase the size of safe-zones. There was a complexinterplay between the orientation angles of the femoral and acetabular components. When the CCD-angle was 130°, the optimum relationship between operative acetabular anteversion (OA) and femoral antetorsion (FA) could be estimated by the formula: OA=-0.80×FA+47.06, and the minimum allowable operative acetabular inclination (OImin) would be more than 2 10.5 ×GR^-2255.
Conclusions: Large GRs greatly increase the size of safe-zones and it is recommended that the GR be more than 2.37 so as to extend the acceptable range of error that surgeons cannot avoid completely during operation. As to the optimum operative acetabular inclination (OI), surgeons need to make a decision combining with other factors, including stress distribution, soft tissue and cup wear conditions, as well as patients' individual situations and demands. The data obtained from this study and the module of THA can be used to assist surgeons to choose and implant appropriate implants. 相似文献
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四肢主要动脉损伤的治疗(附66例报告)张力成潘可平四肢主要动脉损伤后果严重。如能早期诊断,及时妥善处理,则可使受伤肢体获得挽救。六年中我院共收治76例四肢主要动脉伤,重建循环者68例,除2例因严重感染而行Ⅱ期截肢外,66例获成功,现报告如下。1临床资... 相似文献
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目的:探讨双钢板固定治疗闭合性Pilon骨折的临床疗效和安全性.方法:2008年5月至2011年3月,采用双钢板固定治疗闭合性Pilon骨折患者33例,男18例,女15例;年龄38~55岁,中位数48岁;左侧14例,右侧19例;Rüedi - Allg(o)werⅡ型14例、Ⅲ型19例.受伤至手术时间5~12 d,中位数7 d.术后观察骨折愈合、踝关节功能恢复及并发症发生情况.结果:本组33例,采用前外侧解剖型钢板加内侧支持板固定19例,采用前内侧解剖型钢板加外侧支持板固定14例;植骨25例;手术时间132~210 min,中位数168 min;术中出血120~300 mL,中位数190 mL;术后切口感染2例,经局部换药后切口愈合.33例患者均获得随访,随访时间12~18个月,中位数15个月;骨折均骨性愈合,愈合时间3~14个月,中位数7个月.术后并发创伤性关节炎3例,经理疗及关节腔注射曲安奈德和玻璃酸钠注射液后,踝关节功能无明显改善.无钢板断裂、退钉、螺钉松动、骨折延迟愈合等并发症发生.采用Mazur踝关节评分系统评价患肢踝关节功能,本组优16例、良11例、可4例、差2例.结论:双钢板固定治疗Ⅱ、Ⅲ型Pilon骨折,固定可靠、可早期功能锻炼、并发症少,有利于骨折愈合和踝关节功能恢复. 相似文献