EFFECT OF HIGH ALTITUDE ON PREVALENCE OF CONGENITAL HEART DISEASE

The prevalence of congenital heart disease (CHD7at high altitude was determined by st.trveying 1116children at 4 study sites, ranging from sea level to4 300 M. Children were screened by physical exami-nation, and echocardiogram and electrocardiogramwere done on those suspected of having CHD. Ahigh prevalence of patent ductus arteriosus (PDA)and atrial septal defect (ASD) was found at highaltitude sites and the effect of altitude was progres-sivc. At 4300 M, a combined prevalence of 5.2%was found. PDA is thought to result from failureof low atmospheric p02 to constrict ductal muscle.We speculate that the persistence of high pulmonaryvascular resistance and right heart pressure inhibits early closure of the patent foramen ovale (PFO) andthat the flap becomes incompetent with growth, re-sulting in ASD. The high prevalence of ASD/PFOin tetralogy of Fallot may be analogous and related to high right ventricular pressurc present from birth.     

中药自芍在胃双对比造影中的作用

提高胃粘膜细微结构的显示是胃双对比造影很重要的一个问题,本文通过实验筛选观察到白芍在这方面的作用,用白芍煎液作胃清洗的60例与未清洗胃的60例作对照比较,经用Ridit 分析数据,白芍组的可信限为0.698～0.826,与对照组相比P<0.05,说明白芍清洗组明显优于对照组。     

诺氏疟原虫环子孢子抗原基因的结构和表达

已知的诺氏疟原虫环子孢子抗原(CS)基因的结构是获自红内期原虫基因组DNA的,该期CS基因不表达。为了观察子孢子期CS基因结构是否与红内期相同及CS基因的表     

介绍吸引器负压瓶自动排水器

为防止吸引器负压瓶内液体量过多而吸入机芯,我们自制了自动排水器,较好地解决了这一问题,且不必反复倾倒污液。材料及制作取内径2～3 cm、长15 cm 的铁管一段,用火烧红,把一端弯成120°,并在弯端铣出70°的斜面,斜     

北京男性青年1991～1992年四季血清流感血抑抗体水平的分…

作者于１９９１年４、８、１１月和１９９２年２月在北京市北、东南和南３个部队营区共采集１２７９例血清，以当前国家流行的流感病毒株Ａ／京防／１／８６（Ｈ１Ｎ１），Ａ／济防／１５／９０（Ｈ３Ｎ２），Ｂ／沪防／２４／８８为抗原，检测血凝抑制抗体。人群对甲１抗体阳性率最高≥１：１０者８３％，ＧＭＴ（几何平均滴度）为３８．１。对甲３抗体次之，抗体阳性率为５９％，ＧＭＴ２４．９。人群对乙型抗体最低，抗体阳性率为     

肝外伤60例治疗体会

目的：探讨肝外伤治疗方法的合理选择．方法：回顾分析60例肝外伤的临床资料．结果：60例中非手术治疗6例，手术治疗54例，34例单纯肝缝合术，10例大网膜堵塞附加缝合术，全部治愈，纱布填塞术6例，3例治愈，3例死亡，切除性扩创术4例，2例治愈，2例死亡。结论：采用合理适当的手术治疗方法，可以提高肝外伤救治成功率。