什么原因导致射精软弱无力

<正>有些男子主诉他们的精液不再象过去那样有力地射出,而是无力地缓慢溢出或流出。射精力量和精液体积的减少,有以下几种可能的原因:如频     

钬激光切开结合扩张治疗尿道狭窄11例报告

目的 探讨尿道狭窄微创技术的临床价值.方法 采用输尿管镜下钬激光切开结合筋膜扩张器扩张手术治疗11例.结果 手术均获得成功,手术简单无术中及术后并发症.排尿通畅,再狭窄机会减少.结论 钬激光创伤小,手术切开效果好,切开前先行扩张有利于切割,提高了手术成功率.完全闭锁且闭锁段长者采用逆行、顺行切开是手术成功的关键.     

食管后异常锁骨下动脉合并左右颈总动脉共干一例报告

食管后异常锁骨下动脉合并左右颈总动脉共干一例报告吴志虹，符皎荣（海南医学院，海口５７０００５）关键词主动脉弓，无名动脉，颈总动脉，右锁骨下动脉，气管，食管中图分类号Ｒ３２２．１食管后异常锁骨下动脉的发生，近年来陆续有报道。但同时合并左右颈总动脉共干的...     

江豚(Neophocaena Phocaenoides)的动脉系统(Ⅰ)心脏、主动脉弓和头颈部的动脉

研究了江豚的心脏，主动脉弓和头颈部的动脉，并与多种齿鲸相比较。与陆生哺乳类相比：江豚的心尖偏右，江豚左、右头臂动脉干的直径差别很大，右胸后动脉由右头臂动脉干发出；无椎动脉，颈内动脉退化，颈外动脉明显粗大；无明显的颈动脉窦结构；左、右舌动脉分支为３支和２支     

Experimental simulation of model platelet adhesion to a semi-permeable wall exposed to flow disturbance

A sudden tubular expansion with a semipermeable wall was constructed from a tubular dialysis membrane to investigate the effects of rdtration flow and flow disturbance on particle deposition. The expansion was perfused with a dilute, neutrally buoyant suspension of 1.10μm diameter polystyrene latex spheres (as models of platelets) in Tris buffer solution containing 10% Dextran T70 and 2% bovine serum albumin. The results showed that adhesion of particles correlated positively with the filtration rate and inversely with the wall shear rate. In the vortex flow region distal to the expansion, particle adhesion was significantly elevated with a maximum at the reattachment point where the wall shear rate was the lowest and particles were constantly carried toward the vessel wall along the curved streamlines. In conclusion, rdtration flow has a profound impact on the interaction of blood cells such as platelets with blood vessel walls, and the disturbed flow with a low wall shear rate can enhance the deposits of platelet thrombi to the vessel wall.     

中国小型猪动脉粥样硬化狭窄模型的建立及其意义

本实验利用中国小型猪制作动脉粥样狭窄病变模型，采用球囊扩线的方法对１５头小型猪骼动脉内膜进行损伤并饲以高脂饮食，术后１２周病理检查内膜增生及管腔狭窄情况，结果显示：１３头动物２６支血管有１２支（４６．２％）狭窄程度对超过５０％，其中４支（１５．４％）血管完全闭塞。表明中国小型猪不仅能诱发动脉粥样硬化病变，而且在血管损伤的基础上也可以产生动脉病变。     

浅议部分内脏器官血管的教学

介绍心脏、肺、肝脏、肾脏等内脏器官的功能性血管和营养性血管     

经颈椎间孔横突孔注射与颈部软组织针刀松解治疗椎-基底动脉供血不足的临床研究

目的:系统评价观察颈椎间孔、横突孔注射与颈部软组织针刀松解治疗椎-基底动脉供血不足(VBl)的临床疗效,并探讨其作用同理。方法:将80例椎-基底动脉供血不足患者随机分成治疗组、对照组,分别采用颈椎间孔、横突孔注射与颈部软组织针刀松解,低分子右旋糖酐加复方丹参注射液静脉滴注治疗,结果:治疗组疗效明显优于对照组,两组疗效比较有显著差异(P<0.05),治疗组与对照组治疗前后症状体症比较有非常显著性意义(p<0.01),治疗组治疗前后椎动脉(VA),基底动脉(DA)流速有非常显著性差异(P<0.01)。结论:①颈椎间孔、横突孔注射与颈部软组织针刀松解对椎一基底动脉供血不足患者临床疗效、体征改善、椎动脉(VA)、基底动脉(BA)血液流速改善明显优于对照组。②通过对椎动脉(VA)、基底动脉(BA)解剖、生理及颈椎退变、增生压迫或颈交感神经受刺激学说进行论证,从理论上说明了本疗法客观实用性。