首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   680篇
  免费   24篇
  国内免费   41篇
耳鼻咽喉   1篇
儿科学   20篇
妇产科学   1篇
基础医学   19篇
临床医学   88篇
内科学   168篇
神经病学   3篇
特种医学   11篇
外科学   156篇
综合类   195篇
预防医学   16篇
药学   19篇
  1篇
中国医学   32篇
肿瘤学   15篇
  2024年   2篇
  2023年   2篇
  2022年   3篇
  2021年   14篇
  2020年   13篇
  2019年   17篇
  2018年   8篇
  2017年   8篇
  2016年   18篇
  2015年   10篇
  2014年   26篇
  2013年   36篇
  2012年   21篇
  2011年   31篇
  2010年   28篇
  2009年   27篇
  2008年   33篇
  2007年   33篇
  2006年   47篇
  2005年   33篇
  2004年   24篇
  2003年   28篇
  2002年   25篇
  2001年   25篇
  2000年   20篇
  1999年   13篇
  1998年   19篇
  1997年   17篇
  1996年   14篇
  1995年   17篇
  1994年   19篇
  1993年   27篇
  1992年   15篇
  1991年   15篇
  1990年   20篇
  1989年   9篇
  1988年   11篇
  1987年   3篇
  1986年   6篇
  1985年   4篇
  1984年   1篇
  1982年   1篇
  1980年   1篇
  1977年   1篇
排序方式: 共有745条查询结果,搜索用时 10 毫秒
31.
目的探讨内镜下钬激光碎石治疗胆总管结石的方法与近期疗效,总结其技术要点。方法回顾性分析我院施行内镜下钬激光碎石治疗胆总管结石23例的治疗经过及近期随访结果,其中腹腔镜结合胆道镜手术8例,开腹胆总管切开取石12例,经T管窦道硬质输尿管镜下钬激光碎石治疗胆道残余结石3例。结果 23例均获成功,无胆道损伤、胆漏;其中1例腹腔镜结合胆道镜行胆总管探查术者因胆总管下段结石嵌顿、胆管粘膜水肿严重致视野不清仅行T管引流,二期经T管窦道钬激光碎石,余病例均获得一次性结石清除,2例术后胆道少量出血未行特殊处理自愈,随访3~6月无残留结石。结论钬激光碎石治疗胆管结石是一种安全、有效的方法。  相似文献   
32.
目的探讨经内镜乳头括约肌切开术(endoscopic sphincterotomy,EST)联合腹腔镜胆囊切除术(Laparoscopic cholecystectomy,LC)治疗老年人胆囊结石合并胆总管结石的疗效。方法回顾分析我院采用EST联合LC序贯治疗66例老年胆囊结石并胆总管结石患者的临床资料。结果十二指肠镜下胆总管结石取石成功率92.4%(61/66)。LC成功率93.2%(55/59)。EST+LC成功病例总住院时间8~27 d,平均13.5 d。本组18例EST后出现轻型胰腺炎,经保守治疗后好转,未出现其他严重并发症。结论 EST联合LC治疗老年人胆囊结石合并胆总管结石具有创伤小、恢复快、术后生活质量高等优点,是一种安全、有效、可行的微创手术方式。  相似文献   
33.
Five cases are reported of children with gallstones diagnosed by ultrasound during their first 7 months of life. Of the four with symptomatic gallstones, one subsequently developed vitamin K deficiency syndrome with profuse bleedings. The children, who belonged to a defined population, were all diagnosed within an 18-month span, suggesting the frequency of early gallstone formation to be higher than formerly supposed. One child had haemolytic anaemia, but none of the conventional risk factors for stone formation was present in the other four cases.  相似文献   
34.
胃癌根治术后并发胆石症的分析   总被引:1,自引:0,他引:1  
目的回顾分析胃癌根治术后并发胆石症的病例特征,并探讨其可能形成机制。方法随访胃癌根治术术后长期存活(5~10年)和胃大部切除术后病例,观察比较术后胆结石的发病情况。结果共随访145例胃癌根治术后患者,45例(31.0%)出现胆结石;胃大部切除术后患者41例,胆结石发病率为22.0%;两组胆结石发病率均显著高于自然人群的6.5%(P<0.01)。结石的发病与淋巴结清扫程度有关,清扫范围越广发病率越高(P=0.0107);以不经十二指肠通路的Roux-en-Y、毕II式消化道重建的发病率更高。胆结石以多发性小结石为特点。结论胃癌根治术后有较高的胆石症发病率,两者密切相关;胆道动力学改变在结石的发生中起着重要作用。  相似文献   
35.
An unusual case of cholelithiasis in an 18–month-old boy with cervico-oculo-acoustic (Wildervanck's) syndrome is presented. Our patient had Duane's retraction syndrome, Klippel-Feil anomaly and congenital deafness. To our knowledge this is the first case in which a probable association between cholelithiasis and Wildervanck's syndrome has been recorded. On the other hand, the presence of mutual malformations and anomalies such as scoliosis, ventricular septal defect, ectopic kidney, hydrocephalus, hypoplastic thumb and growth retardation seems to suggest that Wildervanck's syndrome is a clinical variant of Klippel-Feil sequence.  相似文献   
36.
Summary An unusual case of upper gastrointestional hemorrhage caused by gallstone impaction in the duodenal bulb (Bouveret's syndrome) is reported. Endoscopy was used to make the diagnosis rapidly and surgery was performed to provide definitive treatment. Bouveret's syndrome must be kept in mind as a rare cause of upper gastrointestinal hemorrhage.  相似文献   
37.
Based on the principle of fluid mechanics a mathematical model of the oval gallbladder'smoving boundaries was obtained by CT,radio contrast radiography and B mode echography.Weadopted for the first time in this field,the finite element method to calculate the transient flow fieldwithin the human gallbladder in vivo and successfully made out the distribution of bile flow withinthe cyst,known as Newtonian fluid and axisymmetric flow.Thus we completed the poineering ofthe bile flow study within the gallbladder,and confirmed the way of the cholelithogenesis withinthe cyst.Theoretically the vortex flow is proved to be the mechanical factor in the formation ofgallbladder stone and several conclusions were drawn from this study:(1)near the axis of thecontacting gallbladder exists an accelerated bile out-flow column;(2)near the central cross-section ofthe flow field there exist two opposed vortex areas,the one which near the axis rotatescounterwise and flows faster;(3)a gross similarity exists between the law of attenuation of bile flowvelocity and the gallbladder contraction;(4)chololithogenesis within the cyst is related to the vortex inthe flow field.  相似文献   
38.
通过对50例胆石病患者胆囊切除术前、后免疫球蛋白的观察,发现胆囊切除术前血清中IgG、IgA、IgM均有不同程度的增高,尤以IgG和IgA为突出,而胆囊切除术后,血清IgG和IgA均有较大幅度下降,比较术前术后IgG和IgA的改变,有显著差异(P<0.01)。从而提示免疫球蛋白可能不参与胆石的形成,而胆石的存在做为一种刺激因子使机体产生更多的免疫球蛋白,当去除病因,消除刺激后,血清免疫球蛋白有不同程度的下降。  相似文献   
39.
本文报告我院1991年9月至1992年1月,应用电视腹腔镜切除胆囊202例经验,重点对手术适应征进行探讨,掌握好LC手术的适应征,以便使这一新技术进一步发展。  相似文献   
40.
The prevalence of cholelithiasis in Jamaican adults with SS disease was studied by plain abdominal radiograph in 206 patients and by oral cholecystogram in 126 (61%) of these patients. Gallstones were found in 57 (28%) of patients, were more common in females than males, and increased with age and hemolytic rate. The majority of gallstones were visible on the plain abdominal radiograph, only 17% of patients with gallstones having only radiolucent stones. Nonfunctioning oral cholecystograms were common (10%) in agreement with observations by previous workers. Gallstones were noted in the common bile duct in 2 patients. In general there was no clear relationship between the presence of cholelithiasis and clinical symptomatology. Complications, such as pancreatitis and malignant change in the gall bladder, recognized to be associated with cholelithiasis in the general population, have not been clearly related to cholelithiasis in SS disease. More information is needed before a logical policy can be evolved for surgical intervention in cholelithiasis in SS disease.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号