全文获取类型
收费全文 | 31906篇 |
免费 | 2782篇 |
国内免费 | 75篇 |
专业分类
耳鼻咽喉 | 277篇 |
儿科学 | 897篇 |
妇产科学 | 800篇 |
基础医学 | 4550篇 |
口腔科学 | 847篇 |
临床医学 | 3312篇 |
内科学 | 6416篇 |
皮肤病学 | 396篇 |
神经病学 | 3378篇 |
特种医学 | 1402篇 |
外国民族医学 | 1篇 |
外科学 | 4311篇 |
综合类 | 716篇 |
一般理论 | 27篇 |
预防医学 | 2728篇 |
眼科学 | 755篇 |
药学 | 2131篇 |
2篇 | |
中国医学 | 63篇 |
肿瘤学 | 1754篇 |
出版年
2021年 | 391篇 |
2020年 | 254篇 |
2019年 | 411篇 |
2018年 | 503篇 |
2017年 | 391篇 |
2016年 | 400篇 |
2015年 | 462篇 |
2014年 | 657篇 |
2013年 | 1126篇 |
2012年 | 1483篇 |
2011年 | 1584篇 |
2010年 | 823篇 |
2009年 | 802篇 |
2008年 | 1430篇 |
2007年 | 1498篇 |
2006年 | 1592篇 |
2005年 | 1607篇 |
2004年 | 1570篇 |
2003年 | 1483篇 |
2002年 | 1453篇 |
2001年 | 788篇 |
2000年 | 778篇 |
1999年 | 719篇 |
1998年 | 382篇 |
1997年 | 329篇 |
1996年 | 318篇 |
1995年 | 312篇 |
1994年 | 293篇 |
1993年 | 286篇 |
1992年 | 586篇 |
1991年 | 636篇 |
1990年 | 579篇 |
1989年 | 505篇 |
1988年 | 534篇 |
1987年 | 495篇 |
1986年 | 463篇 |
1985年 | 508篇 |
1984年 | 434篇 |
1983年 | 341篇 |
1982年 | 259篇 |
1981年 | 283篇 |
1980年 | 242篇 |
1979年 | 346篇 |
1978年 | 308篇 |
1977年 | 266篇 |
1976年 | 242篇 |
1975年 | 249篇 |
1974年 | 282篇 |
1973年 | 232篇 |
1972年 | 256篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Anthony Echo Leo R. Otake John R. Talley Thomas Satterwhite Jeffrey A. Norton Gordon K. Lee 《European journal of plastic surgery》2013,36(7):457-462
Complex thoraco-abdominal wall defects following tumor resection create a unique reconstructive challenge, which centers on anatomically re-establishing the thoracic and abdominal compartments to prevent visceral herniation. Autologous tissue may not be available or adequate to reconstruct these defects; therefore, the use of alternative options, such as non-autologous material, is often necessary. To our knowledge, very little has been described about the use of biologic mesh for the reconstruction of large thoracic defects. We present a review of the literature and present a novel approach to address a difficult defect with the use of cross-linked porcine dermal collagen (Permacol) to bridge a thoraco-abdominal defect while stabilizing the diaphragm. Level of Evidence: Level V, therapeutic study. 相似文献
992.
993.
Peter Michael Prodinger Hans Rechl Matthias Keller Hakan Pilge Maya Salzmann Ruediger von Eisenhart-Rothe Boris Michael Holzapfel 《International orthopaedics》2013,37(10):1987-1993
Purpose
Desmoid tumours of the extremity have a high recurrence rate. The purpose of this study was to analyse the outcome after resection of these tumours with special emphasis on recurrent disease and adjuvant therapeutic strategies.Methods
In this retrospective study we evaluated prognostic factors for recurrence-free survival after surgical treatment of desmoid tumours of the extremity in 27 patients with an average age of 41 years treated from 1997 to 2009. Adjuvant radiotherapy (50–60 Gy) was given in five cases with primary and in nine patients with recurrent disease. The average follow-up was 64 months.Results
The five-year recurrence-free survival in patients with primary disease was 33 %. Patients with negative resection margins tended to have a better outcome than patients with positive resection margins, but the difference between both groups was not significant (56 vs 14 %, p = 0.145). In patients with positive margins, adjuvant radiotherapy did not significantly improve recurrence-free survival (40 vs 14 %, p = 0.523). Patients with local recurrence had a five-year further recurrence-free survival of 47 %. In those patients further recurrence-free survival was significantly better after adjuvant radiation (89 vs 25 %, p = 0.015). Two thirds of all patients suffered moderate or severe complications due to the treatment regimen.Conclusions
Compared to desmoids of the trunk or the head and neck region, desmoids affecting the limbs show by far the worst outcome in terms of relapse or treatment-related morbidity. The importance of negative resection margins is still not clear. Particularly in recurrent desmoids adjuvant radiotherapy appears to reduce the further recurrence rate. Therefore, a general use of radiation should be considered for this high-risk group. 相似文献994.
Bobbie King Gordon Carlson Basem A. Khalil Antonino Morabito 《World journal of surgery》2013,37(3):694-704
Background:
It has been thirty years since Bianchi introduced the technique that made intestinal lengthening possible. The last three decades have seen lengthening procedures established as vital components of intestinal rehabilitation programs. The goal of the present study was to use a systematic literature review to determine patient outcomes for the two most commonly used lengthening procedures, the Bianchi procedure and the serial transverse enteroplasty procedure (STEP).Methods:
Pubmed and Embase were searched using the terms “intestinal lengthening” and “bowel lengthening.” Patient outcomes were extracted from each relevant journal article on the basis of a set proforma. The results were combined to create overall mean outcomes. Mean outcomes were also calculated separately for the Bianchi procedure and STEP. Significance was tested with the independent t-test.Results:
Overall survival for the last thirty years is 83 %. However, survival for the last fifteen years has been 89 %, with no significant difference between the two procedures. The Bianchi procedure has a higher rate of weaning patients who were static on parenteral nutrition with conservative measures: 55 % versus 48 %. In addition, the Bianchi procedure was associated with a higher rate of patients receiving transplants: 10 % versus 6 %. The STEP has a higher rate of complication. Length of follow-up is significantly longer for the Bianchi procedure: 76 versus 22 months. The impact that this differential could have had on our results must be considered.Conclusions:
Outcomes for intestinal lengthening procedures are very good, and increasingly so. However, further analysis is required in order to fully understand the relative strengths and weaknesses of each procedure. 相似文献995.
996.
997.
Thomas E. Ahlering Adam Gordon Blanca Morales Douglas W. Skarecky 《Current urology reports》2013,14(1):52-58
Preservation of postoperative urinary continence remains the primary concern of all men and their surgeons following robot-assisted radical prostatectomy (RARP). Without doubt, continence is the most important quality of life issue following radical prostatectomy. Identification of difficulties and lessons learned over time has helped focus efforts in order to improve urinary quality of life and continence. This review will examine definitions of continence and urinary quality of life evaluation, technical aspects and the impact of patient-related factors affecting time to and overall continence. 相似文献
998.
Gordon StewartAjit Panickar 《Anaesthesia and Intensive Care Medicine》2013,14(12):524-527
The involvement of the sympathetic nervous system in chronic pain conditions has been well described and recognized for over a century. However, the exact mechanism of the relationship has not been fully explained. In certain chronic pain conditions (e.g. complex regional pain syndrome (CRPS)), the presence of sympathetic signs forms part of the diagnostic criteria. 相似文献
999.
M.K. Mirahmadi C.H. Barton N.D. Vaziri S. Gordon N. Penera 《The journal of spinal cord medicine》2013,36(2):36-40
ABSTRACTBoth end stage renal disease (ESRD) and spinal cord injury (SCI) represent major disabling conditions that may be associated with protein-calorie malnutrition (PCM). The prevalence of PCM in ESRD, however, remains unknown, and virtually no data exist regarding the status of PCM in patients with both SCI and ESRD. In this study we evaluated 23 ambulatory-ESAD patients and 11 SCI-ESRD patients utilizing a range of parameters recommended for assessing nutritional status in ESRD. Based on these parameters, our results show evidence for PCM in a substantial proportion of both groups. When the two groups were compared, however, the frequency and severity of PCM were significantly greater in the SCI-ESRD patients. Important factors felt to adversely influence nutritional status in the SCI-ESRD patients were intercurrent infection and amyloidosis that were found to frequently complicate this setting. It is also probable that the combined effects of PCM and ESRD significantly predispose these patients to further infection, establishing a vicious cycle. 相似文献
1000.