Establishment of the culture technique of pulmonary vascular pericytes and its identification in rats

Summary In order to study the cellular origin of muscularization in non-muscular arterioles of the lung, the pulmonary vascular pericytes-culture was established. The terminal lung tissue of the rat was taken out and minced. Then 0.5 % of type IV collagenase solution was added for digestion and the microvascular segments were obtained by screening. The targeted cells were cultured by “selective conditioned media”. Under phase-contrast microscope, the cultured cells were large in size with ragged margin and numerous pseudopodia, which imparted tubule-like structure. There was no contact inhibition in growing cells, so multiple layers developed. When they were confluent, there were morphologically no “hillock and dale” growth pattern as in smooth muscle cells or “weave-like” pattern as in fibroblasts. The ultrastructure of cultured cells showed numerous digital processes, moderate amount of rough and smooth endoplasmic reticulum, rich Golgi’s apparatus, microfilaments, few lysosomes without myofilaments and dense bodies. Immunohistochemical staining revealed that the cultured pericytes had same kind of cellular skeletal protein, α-SM-actin, like smooth muscle cells. The cultured cells also exhibited positive reaction to CD₃₄ antigen and S-100 antigen, which were negative in smooth muscle cells and fibroblasts. The cell growth pattern, ultrastructure and immunological phenotype suggested that the cultured cells had characteristics of vascular pericytes. Pericytes are one of the components of microvascular cells, and the establishment ofin vitro culture technique of pericytes is of significance for further exploration of the muscularization of non-muscular arterioles in lung and the mechanism of structural remodeling of pulmonary vessels. This project was supported by the grant of National Nature Sciences Foundation of China (No. 39570289).     

硝酸甘油与美托洛尔预防气管插管所致循环副作用的比较

①目的　比较硝酸甘油与美托洛尔在麻醉诱导中对心率、血压和左室射血功能的影响。②方法　２４例病人随机分为３ 组,每组８ 例。麻醉诱导均选用芬太尼、硫喷妥钠和琥珀酰胆碱。于静脉诱导后分别静注美托洛尔、硝酸甘油和生理盐水,监测气管插管时平均动脉压（ Ｍ Ａ Ｐ）、心率（ Ｈ Ｒ）和每搏量（ Ｓ Ｖ）变化。③结果　插管后美托洛尔组 Ｍ Ａ Ｐ低于对照组, Ｈ Ｒ 低于对照组及硝酸甘油组, Ｓ Ｖ 高于硝酸甘油组,差异均有显著性（ Ｆ＝ ４．０７～５．９６,ｑ＝ ３．４４～４．４９, Ｐ 均＜ ０．０５）。④结论　美托洛尔与硝酸甘油皆可预防气管插管所致的循环副作用,但美托洛尔作用优于硝酸甘油。     

云南省盈江县蚊虫调查及乙型脑炎病毒分离

1984年及1989年7～8月,在盈江县捕获成年雌性蚊虫7属32种632O只,霜背库蚊、三带喙库蚊和棕头库蚊是农村畜圈的主要蚊种,伪白纹伊蚊和白纹伊蚊是野外竹林区的优势蚊种。对所获蚊虫用C6/36细胞和小白鼠方法分离病毒,从三带喙库蚊和窄翅伊蚊中各分离到1株乙型脑炎病毒。分析认为三带喙库蚊是当地乙型脑淡病毒的主要传播媒介,窄翅伊蚊亦可参与该病毒的传播。     

联合内分泌治疗对前列腺和睾丸的影响

目的 探讨抑那通和缓退瘤联合治疗对正常前列腺,增生的前列腺（ＢＰＨ）和前列腺癌以及睾丸的作用。方法 对１６例接受联合内分泌治疗至少３个月且有治疗前后病理资料的前列腺癌患者的标本进行了系统的病理学检查。对内分泌治疗后的睾丸标本与同龄未接受治疗的进行对照研究。结果 １４例内分泌治疗后的前列腺标本２例未见残存癌灶,９例对治疗有明显的反应;３例对治疗反应差,治疗并未降低前列腺癌的病理分期。３例内分泌治疗后     

44例医院内深部白色念珠菌感染危险因素分析

目的　探讨住院患者并发深部白色念珠菌感染的危险因素。方法　通过回顾性调查对１９９５年１ 月～１９９７ 年１２ 月发生的４４ 例深部白色念珠菌感染患者的危险因素进行分析。结果　发生医院内部白色念珠菌感染多系慢性呼吸系统疾病、恶性肿瘤和血液病患者,占５９－０９ ％ ;感染与住院时间成正比;广谱抗生素大剂量、长时间应用,特别是选择广谱、杀菌力强的第三代头狍菌素类是致感染的主要因素;白色念珠菌感染是多种危险因素综合作用的结果,感染者使用激素的占４０－９１ ％ ,使用免疫抑制剂及放疗化疗的占１１－３６％ ,实施插入性操作及各种介入性治疗为感染创造了条件。结论　强调合理使用抗生素,严格控制免疫抑制剂的应用,合理掌握放疗化疗及各种诊疗技术,提高机体免疫力,是预防深部白色念珠菌感染的重要措施     

颈总动脉形态及血流动力学改变与脑梗死类型的关系

目的研究颈总动脉形态及血流动力学改变与脑梗死类型的关系。方法应用经颅彩色双功能多普勒超声检查法．测定40例脑穿通支动脉梗死、31例脑主干支动脉校死和30例正常对照者的颈总动脉管径及有或无粥样斑块等反映血管形态和收缩峰速、每分钟血流量、阻力指数等血流动力学指标。结果结果表明当颈总动脉出现粥样斑块,而无明显血流动力学改变时,易发生穿通支脑梗死;随着血流动力学,尤其是血流收缩峰速度和阻力指数等指标的异常程度加重,发生脑主干动脉梗死的危险性增大。结论颈总动脉形态及血流动力学改变与患者发生脑梗死类型密切相关。     

针对居民的医疗保健要求探索全科医疗的开展

通过对宜川街道赵园二委１７００余户居民进行家庭健康问卷调查,结果大约有３０％居民愿意接受全科医疗服务模式,４０％居民需要上门服务,当遇到常见病时首选一级医院医生为对象占５０％,７０％居民认为上门服务应该是有偿的。为此,笔者认为基层医院应在社区卫生服务中大力地探索,只要有市场就应去占领,而且是一级医院赖以生存的社区,应以全科医疗服务模式去改变医患之间关系,把预防保健、医疗、康复、健康教育融为一体,使     

Preoperative infection prophylaxis with 1 % polyvidon-iodine solution based on the example of conjunctival staphylococci

Background: Most germs causing postoperative endophthalmitis derive from the conjunctival bacterial normal flora. Postoperative endophthalmitis is often induced by staphylococcal germs. The application of polyvidone-iodine solution to the conjunctiva is one possibility to reduce potential endophthalmitis-causing bacteria. The aim of this study was to evaluate the effectiveness of 1 % polyvidone-iodine solution concerning the reduction of colonization with staphylococci in the course of intraocular surgery. This is to evaluate the effectiveness of 1 % polyvidone-iodine solution concerning coagulase-negative and positive staphylococci.     

下斜肌转位术治疗分离性垂直偏斜

分离性垂直偏斜（简称DVD）亦称上隐斜。该病病因不清,治疗方法亦各不相同,临床较多采用上直肌减弱术。下斜肌止端转位术是KratZ1989年报道的一种新的DVD矫正术。近三年我们采用上直肌后徙术及下斜肌止端转位术治疗DVD,取得较好疗效。现报告如下,l临床资料11对象本组16例,年龄7一月岁,男6例,女10例,合并内斜9例,合并外斜5例,Helveston综合征2例。患者术前均行视力、屈光状态、眼位、注视性质、眼底、三棱镜及同视机检查。1．2手术设计及效果DVD手术定量主要根据第一眼位用交替遮盖试验测量最大斜视程度来决定,一般在Drp影…