复杂神经元的间室模型

目的:引入间室模型,探讨间室模型描述复杂神经元电学特征的优点.方法:将神经元分成一个个间室,每个间室分列微分方程.结果:当神经元结构比较复杂,膜的特性具有电压依从性,膜上有突触后电流的时候,间室模型能很好地反映了复杂神经元的电学特性.结论:间室模型很好地反映了复杂神经元的电学特性.     

Management of displaced inferior patellar pole fractures with modified tension band technique combined with cable cerclage using Cable Grip System

IntroductionWe present a modified tension band technique combined with cable cerclage using Cable Grip System for the treatment of displaced inferior patellar pole fractures and report the knee functional outcome.Patients and methodsThe patients who had had operative treatment of a displaced inferior patellar pole fracture (AO/OTA 34-A1) between December 2013 and December 2015 were studied retrospectively. Eleven consecutive patients had had open reduction and internal fixation with the modified technique using Cable Grip System, of whom, five males and six females with an average age of 60.9 years (range, 29–81 years). All fractures occurred from direct fall onto the knee. The average time from injury to surgery was 6.1 days (range, 2–12 days). The range of motion (ROM) was measured in degrees by goniometry at postoperative intervals of 1, 2, 4, 12, and 48 weeks; Knee function was evaluated using the Rasmussen scores at final follow-up.ResultsNo patients had nonunion, loss of reduction, migration of wire, irritation from the implant and fixation breakage during the follow-up period. Recovery of ROM was achieved at 12 weeks, with the average ROM at 1 week was 72° (range, 65°–78°), 86.4° (range, 78°–92°) at 2 weeks, 115.5° (range, 103°–122°) at 4 weeks, 129.6° (range, 122°–133°) at 12 weeks, 134.5° (range, 129°–139°) at 48 weeks after the operation. Concerning the knee function outcome assessment, all patients showed excellent results at final follow-up. The average Rasmussen scores was 27.9 out of 30 (range, 27–29).ConclusionsThe modified tension band technique combined with cable cerclage using Cable Grip System for displaced inferior patellar pole fractures can provide stable fixation with excellent results in knee function, allows for immediate mobilization and early weight-bearing, which is a simple and valuable technique in routine clinical practice.     

Kirschner wire和Cable—pin在髌骨骨折手术治疗中的临床效果分析

目的分析比较Kirschner wire和Cable-pin在髌骨骨折治疗中的临床效果和应用价值。方法回顾2006年12月～2009年12月间笔者医院收治的107例髌骨骨折病人,分别用Kirschner wire和Cable—pin手术治疗68例和39例,记录两组病人的骨折类型、手术历时、术中出血量、住院日、医疗费用、术后并发症及远期膝关节功能恢复情况,应用SPSS11．0软件对观察指标进行统计学分析。结果107例病人全部获得随访,随访时间为3～21个月,平均14．2个月。Cable-pin治疗组患者的手术历时和术中出血量均明显少于Kirschner wire治疗组（P〈0．05）,但医疗费用远高于后者（P〈0．01）。两组病人术后并发症、住院日、骨折愈合时间和远期膝关节功能恢复情况无统计学差异。结论应用Kirschner wire手术治疗髌骨骨折更为广泛,方法灵活且疗效肯定,是一种性价比较高的治疗方法;Cable—pin操作简单、疗效可靠,但仅适用于横断性髌骨骨折,且医疗费用昂贵,在临床应用中有一定局限性。     

电缆载流量关键因素土壤温度的试验研究

针对实际运行电缆的不同运行环境进行测量分析,测量结果将为准确快速地计算电缆载流量提供帮助,可有效提高线路容量利用率,对电力系统的安全、可靠、高效运行也有很重要的意义。其中,电缆敷设环境的地温是计算电缆载流量的最基本的参数之一。为此,从2010年10月1日至2011年9月30日,对佛山地区0.5m、1m、1.5m与5m深处土壤温度开展了实地测量,并对结果进行了数据分析,最后给出了佛山地区不同季节、不同地面状况的地温推荐值。     

Dall-miles cable-grip system for periprosthetic fractures of femur

Periprosthetic femur fractures are one of the most serious complications in hip surgery. Treatment of femoral shaft fractures complicating endoprosthesis remains controversial.Twenty-one such fractures were treated with Dall-Miles cable grip system. This modified plate allows for fixation using heavy duty circlage cable wire in conjugation with unicortical and bicortical screws throughout the length of the plate. 3 patients with type II transverse periprosthetic fracture with medial communution had primary bone grafting. 20 of the 21 fractures healed in an average of 5.5 months. One patient developed deep infection and died postoperatively. Use of Dall-Miles cable grip system provides immediate rigid fixation allowing early mobilisation.