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   631篇
  免费   13篇
  国内免费   8篇
儿科学   11篇
妇产科学   22篇
基础医学   37篇
口腔科学   5篇
临床医学   43篇
内科学   41篇
皮肤病学   12篇
神经病学   17篇
特种医学   105篇
外科学   301篇
综合类   6篇
预防医学   13篇
眼科学   7篇
药学   26篇
肿瘤学   6篇
  2022年   4篇
  2021年   3篇
  2020年   4篇
  2019年   6篇
  2017年   2篇
  2016年   3篇
  2015年   13篇
  2014年   9篇
  2013年   9篇
  2012年   16篇
  2011年   19篇
  2010年   29篇
  2009年   18篇
  2008年   25篇
  2007年   35篇
  2006年   39篇
  2005年   30篇
  2004年   20篇
  2003年   25篇
  2002年   20篇
  2001年   25篇
  2000年   22篇
  1999年   19篇
  1998年   25篇
  1997年   25篇
  1996年   21篇
  1995年   13篇
  1994年   14篇
  1993年   15篇
  1992年   7篇
  1991年   14篇
  1990年   6篇
  1989年   15篇
  1988年   15篇
  1987年   7篇
  1986年   12篇
  1985年   7篇
  1984年   3篇
  1983年   2篇
  1982年   7篇
  1981年   2篇
  1980年   8篇
  1979年   6篇
  1978年   3篇
  1977年   7篇
  1976年   7篇
  1975年   9篇
  1973年   1篇
  1972年   3篇
  1971年   1篇
排序方式: 共有652条查询结果,搜索用时 15 毫秒
31.
32.
33.
34.
PURPOSE: Patients requiring chronic anticoagulation are theoretically at increased risk for hemorrhage or thromboembolism perioperatively. Experience with laparoscopic renal/adrenal surgery in patients on chronic warfarin is limited. We assessed hemorrhagic/thromboembolic complications in this group of patients. MATERIALS AND METHODS: The records of 787 patients undergoing laparoscopic renal/adrenal surgery were retrospectively reviewed. A total of 25 patients on chronic oral anticoagulation with warfarin were identified. The indications for warfarin therapy as well as perioperative management were reviewed. Clinical parameters, including operative time, estimated blood loss, hemorrhagic/thromboembolic complications and transfusions, were documented and compared with those in patients not receiving chronic anticoagulation. RESULTS: Atrial fibrillation (56% of cases) and a prosthetic mitral valve (28%) were the most frequent indications for chronic anticoagulation. Bridging anticoagulation with unfractionated heparin was the most frequent management method (68% of cases). Patients with anticoagulation were older (p <0.001) and hospitalized longer (<0.001) than those without anticoagulation. Operative time, estimated blood loss and the conversion rate were not significantly different between the groups. However patients on chronic warfarin significantly more often required transfusion (24% vs 5.2%, p <0.005) and had more postoperative bleeding episodes (8% vs 0.9%, p <0.05) than patients not on chronic anticoagulation. No thromboembolic events occurred in the anticoagulated group, while 3 occurred in the nonanticoagulated group (p = 1). CONCLUSIONS: Laparoscopic renal/adrenal surgery in patients requiring chronic anticoagulation therapy can be performed safely. The risk of intraoperative bleeding is not increased, although the incidence of postoperative bleeding as well as transfusions is higher.  相似文献   
35.
Extrapulmonary small cell carcinoma is an infrequent tumor that can occur in various organs. Although a few sporadic reports about extrapulmonary small cell carcinoma have been published, much remains to be uncovered about the clinical features, optimal treatment, and natural history. We present a case of small cell carcinoma of the epididymis with retroperitoneal recurrence, an exceedingly rare tumor with behavior and treatment not well characterized. Multimodal therapy with chemotherapy and retroperitoneal lymph node dissection was necessary to manage this aggressive disease.  相似文献   
36.
37.
38.
39.
OBJECTIVE: To review a single-institution 6-year experience with laparoscopic live donor nephrectomy detailing the technical modifications, clinical results, as well as the trends in donor and recipient morbidity. SUMMARY BACKGROUND DATA: Since 1995, laparoscopic donor nephrectomy has had a significant impact on the field of renal transplantation, resulting in decreased donor morbidity, without jeopardizing procurement of a high-quality renal allograft. This technique has become the preferred method of allograft procurement for many transplantation centers worldwide but still remains technically challenging with a steep learning curve. METHODS: Records from 381 consecutive laparoscopic donor nephrectomies were reviewed with evaluation of both donor and recipient outcomes. Trends in donor and recipient complications were assessed over time by comparing the outcomes between four equally divided groups. RESULTS: All 381 kidneys were procured and transplanted successfully with only 8 (2.1%) open conversions. Mean operative time was 252.9 +/- 55.7 minutes, estimated blood loss 344.2 +/- 690.3 mL, warm ischemia time 4.9 +/- 3.4 minutes, and donor length of stay was 3.3 +/- 4.5 days. There was a significant decline in total donor complications, allograft loss, and rate of vascular thrombosis with experience. The rate of ureteral complications declined significantly when comparing our early (Group A) versus later (Groups B-D) experience. CONCLUSION: Laparoscopic donor nephrectomy has remained a safe, less invasive, and effective technique for renal allograft procurement. Over our 6-year experience and with specific refinements in surgical technique, we have observed a decline in both donor and recipient morbidity following laparoscopic live donor nephrectomy.  相似文献   
40.
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