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   9538篇
  免费   521篇
  国内免费   303篇
耳鼻咽喉   306篇
儿科学   394篇
妇产科学   166篇
基础医学   204篇
口腔科学   110篇
临床医学   1160篇
内科学   1508篇
皮肤病学   26篇
神经病学   363篇
特种医学   763篇
外国民族医学   1篇
外科学   3151篇
综合类   1185篇
预防医学   197篇
眼科学   86篇
药学   332篇
  7篇
中国医学   172篇
肿瘤学   231篇
  2024年   13篇
  2023年   154篇
  2022年   351篇
  2021年   411篇
  2020年   354篇
  2019年   318篇
  2018年   279篇
  2017年   282篇
  2016年   311篇
  2015年   366篇
  2014年   725篇
  2013年   579篇
  2012年   471篇
  2011年   563篇
  2010年   451篇
  2009年   498篇
  2008年   494篇
  2007年   487篇
  2006年   450篇
  2005年   377篇
  2004年   335篇
  2003年   242篇
  2002年   258篇
  2001年   216篇
  2000年   138篇
  1999年   126篇
  1998年   118篇
  1997年   98篇
  1996年   120篇
  1995年   82篇
  1994年   64篇
  1993年   79篇
  1992年   60篇
  1991年   59篇
  1990年   45篇
  1989年   44篇
  1988年   34篇
  1987年   39篇
  1986年   36篇
  1985年   40篇
  1984年   29篇
  1983年   16篇
  1982年   34篇
  1981年   15篇
  1980年   19篇
  1979年   20篇
  1978年   28篇
  1977年   18篇
  1976年   6篇
  1975年   4篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
胰十二指肠切除术近期合并症及技术改进   总被引:1,自引:0,他引:1  
目的:探讨如何提高壶腹周围肿瘤的切除率以及降低胰十二指肠切除术后的主要并发症-胰漏的发生.方法:1995年3月~2000年12月本院行胰十二指肠术126例,除经典的手术步骤,作者对手术方法进行了改进,完整切除胰腺钩突,在门静脉与胰头粘连时应仔细分离,受到浸润时可合并门静脉侧壁或部分切除,胰肠端侧吻合时,将胰腺残端确切地套入空肠,并在吻合口两角危险区及前壁覆盖一束大网膜.结果:胰十二肠切除技术的改进,提高了切除率和生存率,而且并发症并未增加,本组患者1、3年生存率分别为71.4%、48.6%;胰肠端端吻合胰漏的发生率为4.8%,端侧吻合加吻合口周围附以带蒂大网膜无胰漏发生.结论:随着外科学的进步,胰十二指肠切除及合并门静脉部分切除已是安全有效的手术方式,胰肠端侧吻合加吻合口周围覆盖大网膜能有效地避免胰漏的发生.  相似文献   
122.
Although the efficacy and feasibility of coil embolization of coronary arteriovenous fistulas have been reported, the procedure may be complicated by migration of the coil into peripheral vessels or pulmonary arteries. We report two cases of successful coil embolization of such lesions using an interlocking detachable coil. This system can provide safer and more effective coil embolization in patients with coronary arteriovenous fistula.  相似文献   
123.
The objective of this study was to determine whether magnetic resonance imaging (MRI) could reliably demonstrate fistulas and any associated mass and to see whether these findings were beneficial in the management of the fistula. Twelve consecutive patients presenting with suspected vaginal fistulas were examined prospectively with MRI, using a combination of sequences, for the presence, extent and configuration of fistulas and any associated mass. Comparison was made with CT when available. All patients underwent examination under anesthesia (EUA) and the findings compared. Of the 12 women presenting, seven had vesico-vaginal fistulas (VVF) and seven had recto-vaginal fistulas (RVF). Four women had both types of fistulas. The underlying pathology was cervical cancer (seven cases), colonic cancer (three cases), breast cancer (one case) and ovarian cancer (one case). Vaginal fistulas were unequivocally seen on MRI in eight of 10 cases with fistulas. In the two cases with a difference between the MRI and EUA findings, the MRI was interpreted as showing more than was found at EUA. In the seven women with VVF, MRI detected five of the cases. In the seven women with RVF, MRI detected all seven cases. Magnetic resonance imaging was correct in determining the presence of recurrent disease in the pelvis when an associated mass was seen (seven cases). Computer-assisted tomography was compared in 10 cases and in six cases, the results were comparable and in four cases, more information was obtained from the MRI. Magnetic resonance imaging appears to be accurate in detecting and defining complex gynecologic fistulas and should be considered the investigation of choice to aid the planning of restorative, salvage or palliative surgery.  相似文献   
124.
125.
Tracheoesophageal fistula is a life threatening condition. Patients not managed surgically ultimately die of their disease. Surgical management is the treatment of choice. We present a case of a patient that developed a tracheoesophageal fistula after tracheostomy. Surgical repair was done which failed due to infection. The patient was managed with the help of an esophageal stent and Trichloroacetic Acid cautery. This approach can be used in selected patients, depending upon the size and site of TEE Larger fistulae and those situated lower down e.g. supra carinal cannot be managed by this technique.  相似文献   
126.
A patient had irritative lower urinary tract symptoms for 2 years after hysterectomy. During cystoscopy, a bladder stone was seen and removed, but watery vaginal discharge emerged. The subsequent transvaginal ultrasound revealed a fistulous tract between the bladder and the vagina. The methylene blue test further confirmed the diagnosis of vesicovaginal fistula. We performed a delayed Latzko procedure to successfully repair the fistula.  相似文献   
127.
扩张置管治疗癌性复杂性食管狭窄和瘘的近远期疗效观察   总被引:1,自引:1,他引:1  
辛培玲  弭希峰 《重庆医学》2006,35(6):521-523
目的应用带膜金属支架治疗癌性难治性食管狭窄和瘘,并对近、远期疗效进行观察。方法在电子内镜下应用扩张器和支架置入器,对临床确诊的难治性食管狭窄和(或)瘘的48例患者进行支架置入术。根据病情的不同情况选择不同的治疗方式。结果48例患者共放置支架64个,置管后狭窄处直径由(4.02±1.35)mm增至(15.05±4.02)mm(P<0.01),吞咽困难由3.28±0.42级改善为0.94±0.73级(P<0.01),食管瘘患者瘘口全部闭合。随访1个月及1年有效率分别为100%、74.2%,1年失访共3例,复发共8例经重复治疗缓解。结论内镜直视扩张置管治疗难治性食管狭窄和瘘,操作直观简便,定位准确,成功率较高,近远期效果较好。  相似文献   
128.
129.
A pulmonary arteriovenous fistula is an abnormal connection between pulmonary arteries and veins. Patients with Rendu–Osler–Weber syndrome may present with this vascular malformation, which is a typical finding of the disease. Approximately 5–15% of Rendu–Osler–Weber syndrome patients have pulmonary arteriovenous malformations (AVM) and there is usually a family history of AVM in these patients. The malformations are usually located in the lower lobes. In this paper, I describe a 49‐year‐old male patient with dyspnoea, cough, haemoptysis and epistaxis. Physical examination showed nasal telangiectasias, cyanosis of the lips and nails, and a systolic bruit over the left lung. Chest X‐ray revealed a 5‐cm mass in the left lower lobe and after magnetic resonance examination, together with 3‐D magnetic resonance angiography, it was demonstrated to be a pulmonary arteriovenous fistula. The history of a niece with a similiar history of suspected pulmonary arteriovenous fistula led me to consider the possibility of Rendu–Osler–Weber syndrome presenting with a pulmonary arteriovenous fistula.  相似文献   
130.
隧道式拖线加内口切挂术治疗后位马蹄型肛瘘46例   总被引:14,自引:0,他引:14  
采用隧道式拖线加内口切挂术治疗后位马蹄型肛瘘 4 6例 ,4 4例为一次性治愈 ,2例经一次扩创后治愈 ,平均疗程 (2 6± 3)天。  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