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     

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.