动力加压髁螺钉治疗股骨髁部骨折临床与实验研究

本研究结合１４例股骨髁间、髁上骨折以动力加压髁螺钉（Ｄynamic Ｃondylar Ｓcrew ＤＣＳ）固定。目的：为临床提供应用ＤＣＳ的实验数据。方法：采用成人新鲜尸体股骨髁部标本,按照ＡＯ/ＡＳＩＦ分类,模拟Ｙ形骨折模型,以ＤＣＳ固定,置于ＷＤ－１０Ｅ万能电子力学实验机上其抗拉伸、抗扭转、抗村缩、抗剪切强度。结果：ＤＣＳ有较好的固定强度。临床应用１４例,随访６个月至１年,优良率为８５．７１％。结论：ＤＣＳ适合于     

输卵管阻塞的介入治疗

目的：为明确输卵管阻塞的部位及程度,提供一种安全、可靠成功率高的治疗方法。方法：用自制的输卵管再通器具对５２例病人共８９条输卵管作选择性造影,并对其中７５条间质部或峡部阻塞的输卵管作再通术,术后抗炎及定期输卵管通液治疗。结果：插管成功率为９１％,再通成功率为８１．３％,无严重并发症。结论：该技术操作简单,集诊断及治疗于一体。成功率高,病人痛苦少,是诊治输卵管首选方法。     

PCR和分离培养检测细胞培养支原体污染的比较

目的：检测细胞培养中支原体的污染,建立支原体通用的ＰＣＲ方法。方法：根据已出版的序列设计并合成一对支原体（柔膜体纲）１６ＳｒＲＮＡ基因组特异引物。对实验室所存的１２种支原体、大肠杆菌、变形杆菌及无支原体污染的组织培养细胞进行了ＰＣＲ扩增。以ＰＣＲ与分离培养比较检测了３３份细胞培养标本。结果：１２种支原体均出现了约６２０ｂｐ左右的特异性扩增带,敏感性为１００～１０００个支原体细胞,且常见的６种细胞培养污染支原体的扩增片段均能被ＨｉｎｄⅢ切成２８０与３４０ｂｐ左右的２条带。理论上推测这对引物可扩增所有支原体１６ＳｒＤＮＡ。但对大肠杆菌、变形杆菌及无支原体污染的组织培养细胞等未见有扩增带出现。在对３３份细胞培养标本的检测中,除ＰＣＲ和分离培养同时检出２份阳性外,前方法还另检出阳性３份。５份ＰＣＲ扩增物均被ＨｉｎｄⅢ切出２条带。结论：ＰＣＲ较分离培养敏感性高,可提高细胞培养污染支原体的检出率,防止出现假阴性结果;如做好质量控制,对于一般实验室检测细胞培养支原体污染,ＰＣＲ扩增较分离培养具有更大的应用意义     

Mini-thoracotomy for diaphragmatic plication with thoracoscopic assistance

We describe a technique of mini-thoracotomy to plicate the paralyzed hemidiaphragm with thoracoscopic assistance. Most of the hemidiaphragm can be plicated expeditiously under direct vision with light derived from a posterior thoracoscope placed in the auscultatory triangle. Videoscopic vision is employed only occasionally when the view of the posteromedial hemidiaphragm is obscured. Continuous suture traction can be easily applied through the mini-thoracotomy, thus maintaining suture tension and enabling maximal inversion of the elevated hemidiaphragm.     

Glial cell line-derived neurotrophic factor-like immunoreactivity in human trigeminal ganglion and nucleus

Glial cell line-derived neurotrophic factor (GDNF) is shown by immunohistochemistry in human trigeminal sensory system from 22 weeks of gestation to adulthood. In the trigeminal ganglion, a distinct subpopulation of GDNF-positive neurones is observed, which amounts to about 15% at early pre-term and adult ages and peaks to around 30% at perinatal ages. Labelled neurones are mostly small- and medium-sized. Occasionally, Schwann and satellite cells are stained. GDNF/substance P (SP) and GDNF/calcitonin gene-related peptide (CGRP) double stained neurones occur at all ages examined, whereas GDNF/trkA coexistence can be observed in pre- and full-term newborns only. Centrally, GDNF-immunostained fibers and terminal-like structures are mainly restricted to the spinal trigeminal nucleus, where they are codistributed with SP and CGRP. In the subnucleus caudalis, positive neurones can also be observed both in the superficial laminae and in the magnocellular part, with higher frequency in adults. These results suggest that GDNF may play a functional role in human trigeminal primary sensory neurones throughout life and provide indication for its possible involvement in the regulation of pain-related neuronal circuits in human trigeminal sensory system.     

No association between an intronic presenilin-1 gene polymorphism and schizophrenia in a Chinese population

We investigated the association between schizophrenic psychosis and an intronic polymorphism of the presenilin-1 (PS1) gene in a Chinese population. Schizophrenic and control groups had similar PS1 genotype distributions and allele frequencies, indicating that this polymorphism may not be involved in the development of schizophrenia.