Effect of autocontrol micromotion intramedullary interlocking nail on fracture healing： an experimental study

Objective: To investigate the effect of autocontrol micromotion locking nail ( AMLN ) on experimental fracture healing and its mechanism. Methods: 16 goats undergoing both sides of transverse osteotomy of the femoral shafts were fixed intramedullary with AMLN and Gross-Kempf (GK) nail, respectively. The follow-up time was 7, 14, 28 and 56 days. Roentgenographic, biomechanical, histological, scanning electromicroscopic and biochemical analyses were done. Results: (1) The strength of anticompression, antiflexion and antitorsion in the fractural end in the AMLN-fixed group was higher than that of GK nail-fixed group; whereas, the rate of stress shelter in the fractured end decreased significantly (P<0.01). (2) The content of the total collagen, insoluble collagen, calcium and phosphate in the AMLN-fixed group was higher than that in the GK nail-fixed group (P<0.05). (3) Histological observation and quantitative analysis of calluses revealed that AMLN could promote the growth of bridge calluses and periosteum calluses. Hence the facture healing and remolding process achieved early, which was much better than traditional GK nail fixation. (P<0.05). (4) 7-14 days postoperation, the calluses of AMLN-fixed group was flourish and camellarly arranged and the collagen fibril formed constantly in the absorption lacuna of bone trabecula. 28-56 days postoperation, the collagen fibril was flourish around the absorption lacuna and was parallel to the bone's longitudinal axis. Active bony absorption and formation were seen, so was remolding and rebuilding. Haversian system was intact and the bony structural net was very tenacious because of the deposition of calcium salt. None of the above findings was observed in the GK nailfixed group. Conclusions: The design of AMLN accords well with the plastic fixation theory. As the geometry ametabolic system constituted by the intramedullary fixation instruments and the proximal and distal end of the fracture is very firm and stable, the disturbance to the physical stress distributed in the fractural end is light. The generation and conduct of the intermittent physical stress between the fractural parts could reach the balance between stress conduct and stress protection. The feature that the healing and remolding take place at the same time speeds up the fractural healing process.     

抗人生长激素免疫血清的制备和鉴定

Using small dosage of human growth hormone to immunize rabbit or guinea pig, it is able to induce anti-hGH antibody formation with high titre and high affinity that could be applied to hGH RIA. In the present study five rabbits and three guinea pigs were immunized with 125-200 micrograms and 250-285 micrograms per animal of hGH respectively, followed by boosters of 10-20 or 160-250 micrograms of hGH at 2-4 week intervals for 6 or 3 months. Blood was drown 1-2 weeks before each booster for determination of antibody formation. Antibody titre and affinity were successively observed and specificity of antibody was determined for the final bleeding. It was shown that titres of immune sera from guinea pigs were much higher than those of rabbit immune sera, but vice versa for antibody affinity. This might be due to larger immunogen dose used for guinea pigs than for rabbits. Fourteen different peptide hormones were tested in reference to cross-immunoreactivity to anti-hGH antibody. It could be demonstrated that the major cross-reactive hormones are hFSH and hLH, and hTSH also reacts to rabbit anti-hGH immune sera at a lesser degree. These cross reactivities are obviously owing to the molecular homogeneities between hGH and these hormones especially of their alpha-subunits.     

手法整复治疗肱骨外科颈骨折并肩关节脱位10例

<正> 肱骨外科颈骨折并肩关节脱位,是一种复杂而严重的创伤,临床上并不多见。其手法整复难度大,目前大多数人主张手术治疗,但术后易并发肩关节功能障碍,如处理不当,可造成严重致残。我科自1985～1990年共收治该病10例,均经闭合手法整复,小夹板外固定治疗,疗效满意。1 一般资料本组共10例,男3例,女7例。年龄最小7岁,最大70岁,平均51岁。病史最短3小时,最长15天,平均6.5天。左侧7例,右侧3例。     

传统医学研究的基本类型基本程序和基本方法

传统医学的基本类型根据研究活动的范围的不同,可分为基础医学研究和临床医学研究;按研究深度可分为描述性研究和阐述性研究;针对不同的研究对象和研究目的,可分为分析性研究和综合性研究。传统医学研究的基本程序,在学科层次、部门层次、课题组层次有不同的内容。在传统医学研究的基本方法上作者把传统的传统医学研究方法归纳为经验观察法、个案分析法、类比演绎为主的推理方法、引证验证的论证方法等五个内容,并进一步阐述了研究传统医学方法的现实意义。     

带血管蒂岛状筋膜瓣移植治疗晚期类风湿性髋关节炎

目的：阐明带血管蒂岛状筋膜瓣移植治疗晚期类风湿性髋关节炎的疗效。材料和方法：对４２例４８髋晚期类风湿性髋关节炎病人采用以旋股外侧血管降支为蒂的股前外侧筋膜瓣移植行患髋成形术。结果：术后随访４～１０．５年，平均４．５年，髋关节活动范围术前平均１６．５°，术后２２８．６°，按照Ｃｈａｒｎｌｅｙ和吴之康人工髋关节置换术后的疗效评定标准，优良２９髋、很好１３髋、好６髋，尚可、差、很差无。结论：患者年龄在１５～４０岁之间为合适的治疗年龄。与人工髋关节置换术相比，本方法对髋关节正常结构破坏小；一旦手术失败仍可选用其它治疗方法弥补；且并发症少、费用低、远期效果好。     

SPECT对儿童癫痫的临床意义

1994年以来我院儿科用单光子发射计算机断层（SPECT）脑血流灌注显像对73例癫病患儿的结果进行了统计，并作出临床评价。临床资料一、病例资料73例中男42例，女31例。年龄2～6a26例，0～12a47例。大发作56例，小发作8例，头痛性癫痛、腹型癫病各2例，情景性癫病4例，眩晕性癫痛     

硬膜外腔注射脉络宁对脊神经根炎大鼠血清中PRA和AT-Ⅱ的影响

目的:通过大鼠脊神经根炎模型,观察硬膜外腔注射脉络宁对血浆肾素活性(PRA)和血管紧张素(AT-Ⅱ)的影响.方法:用0.5%福尔马林浸泡的直径为0.5 cm的定量滤纸片作为致炎物,复制大鼠脊神经根炎模型.将动模随机分为5组,A组(正常组);B组(假手术组);C组(模型组)、M组(脉络宁组)和L组(利多卡因组).每只大鼠从硬膜外注药0.6 mL/kg,每4 d给药1次,一共给药4次.术后第18 d取血2 mL,然后用放射免疫分析法(RIA)进行PRA和AT-Ⅱ的测定.结果:C组PRA和AT-Ⅱ含量显著高于A组、B组、M组和L组(P＜0.01);硬膜外注入脉络宁和利多卡因可使血清PRA和AT-Ⅱ含量下降,两组比较无显著性差异(P＞0.05).结论:硬膜外腔注射脉络宁使药物能够高效快速地发挥作用,促进了炎性神经根的修复.