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   954258篇
  免费   78439篇
  国内免费   2014篇
耳鼻咽喉   13613篇
儿科学   27405篇
妇产科学   26997篇
基础医学   139107篇
口腔科学   27973篇
临床医学   83377篇
内科学   182390篇
皮肤病学   18565篇
神经病学   79535篇
特种医学   38913篇
外国民族医学   180篇
外科学   147509篇
综合类   25031篇
现状与发展   3篇
一般理论   352篇
预防医学   77927篇
眼科学   22111篇
药学   70416篇
中国医学   1764篇
肿瘤学   51543篇
  2018年   9324篇
  2016年   8344篇
  2015年   9768篇
  2014年   13884篇
  2013年   20414篇
  2012年   28244篇
  2011年   29492篇
  2010年   16833篇
  2009年   16171篇
  2008年   27535篇
  2007年   29687篇
  2006年   29434篇
  2005年   28729篇
  2004年   27635篇
  2003年   26547篇
  2002年   25334篇
  2001年   38895篇
  2000年   39499篇
  1999年   33607篇
  1998年   10417篇
  1997年   9542篇
  1996年   9476篇
  1995年   8840篇
  1994年   8498篇
  1992年   28520篇
  1991年   27795篇
  1990年   27260篇
  1989年   26180篇
  1988年   24584篇
  1987年   24079篇
  1986年   22894篇
  1985年   22180篇
  1984年   17195篇
  1983年   14697篇
  1982年   9223篇
  1981年   8527篇
  1980年   7966篇
  1979年   17347篇
  1978年   12513篇
  1977年   10493篇
  1976年   9585篇
  1975年   10400篇
  1974年   12947篇
  1973年   12431篇
  1972年   11826篇
  1971年   10969篇
  1970年   10431篇
  1969年   10115篇
  1968年   9145篇
  1967年   8398篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
131.
132.
133.
Objectives: There is a paucity of reporting on surgical outcomes of isolated posterior cruciate ligament reconstruction (PCLR). We hypothesize that isolated PCL injuries failing nonoperative treatment achieve good outcomes and are able to return to sport following PCLR.

Methods: A retrospective analysis was performed to identify patients with isolated PCL injuries that underwent reconstruction between 2001 and 2014. Patients with multi-ligamentous injury or another concomitant knee pathology were excluded. Medical records were reviewed for demographic, clinical and operative data. Patients were contacted for administration of a telephone-based questionnaire which included the International Knee Documentation Committee (IKDC) Subjective Knee Evaluation form, Lysholm-Tegner scales, Marx activity scale (MAS), return to sport status, and patient satisfaction instruments.

Results: A total of 15 isolated PCL reconstructions in 14 patients with a mean age of 27.5 years (range 17–43) met the study inclusion criteria; mean follow up was 6.3 years (range 1.4–15.2). Pre-operatively, the primary complaint was knee instability in all patients; on physical examination, lack of a firm end point during posterior drawer testing was found in 93% (14/15) of the knees. In total, 12 of 15 knees underwent transtibial, single-bundle PCLR and three of 15 underwent tibial inlay, double bundle PCLR. Graft types included: quadriceps autograft (7/15), Achilles allograft (6/15), and hamstring autograft (2/15). There were no graft failures in our patient cohort. At most recent follow up the mean scores respectively on the IKDC form, Lysholm-Tegner scales and MAS were (standard deviation): 77.3 (16.5), 83.1 (17.9), 6.13 (2.6), and 7.1 (6.0). All fourteen patients were athletes prior to their injury and 79% (11/14) returned to sport and overall patient satisfaction was 9.2/10.

Conclusions: Isolated PCLR provides good outcomes at mean medium-term follow up with restoration of function, high rate of return to sport and overall patient satisfaction.  相似文献   

134.
135.
Luckscheiter  A.  Lohs  T.  Fischer  M.  Zink  W. 《Der Anaesthesist》2020,69(3):170-182
Die Anaesthesiologie - Das Management des schwierigen Atemwegs ist eine präklinische Schlüsselqualifikation. Für Notärzte mit hohem Erfahrungsgrad im Atemwegsmanagement sind...  相似文献   
136.
137.

Purpose

To evaluate the feasibility of a same-day yttrium-90 (90Y) radioembolization protocol with resin microspheres (including pretreatment angiography, lung shunt fraction [LSF] determination, and radioembolization) for the treatment of hepatocellular carcinoma (HCC) and liver metastases.

Materials and Methods

All same-day radioembolization procedures performed over 1 y (February 2017 to January 2018) were included in this single-institutional retrospective analysis, in which 34 procedures were performed in 26 patients (median age, 63 y; 13 women), 19 with liver metastases and 7 with HCC. Yttrium-90 treatment activities were calculated by body surface area method. Tumor imaging response was assessed by Response Evaluation Criteria In Solid Tumors (RECIST) 1.1 for liver metastases and modified RECIST for HCC. Clinical side effects and adverse events were graded per Common Terminology Criteria for Adverse Events version 4.0.

Results

All planned cases were technically successful, and no cases were canceled for elevated LSF or vascular anatomic reasons. Pretreatment angiography modified the planned 90Y treatment activity in 1 case in which vascular anatomy required a lobar-dose split into 2 for segmental infusions. In 18% of cases, patients were briefly admitted after the procedure for observation or symptom management. Imaging evaluation of initial efficacy at 1 month demonstrated partial response in 25% and stable disease in 67% of patients with liver metastases and partial/complete response in 43% and stable disease in 14% of patients with HCC. Grade ≥ 3 adverse events occurred in 6% of cases, with no systemic therapy–limiting toxicities. The mean total procedure time was 4.2 hours.

Conclusions

A same-day 90Y radioembolization protocol with resin microspheres is feasible in select patients, which can expedite cancer therapy.  相似文献   
138.
139.
140.
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