全文获取类型
收费全文 | 1766554篇 |
免费 | 157441篇 |
国内免费 | 3805篇 |
学科分类
医药卫生 | 1927800篇 |
出版年
2021年 | 13910篇 |
2020年 | 12547篇 |
2019年 | 23163篇 |
2018年 | 28161篇 |
2017年 | 24430篇 |
2016年 | 26609篇 |
2015年 | 28769篇 |
2014年 | 35985篇 |
2013年 | 48307篇 |
2012年 | 56502篇 |
2011年 | 59396篇 |
2010年 | 40476篇 |
2009年 | 35213篇 |
2008年 | 53755篇 |
2007年 | 56207篇 |
2006年 | 56697篇 |
2005年 | 53618篇 |
2004年 | 51781篇 |
2003年 | 49204篇 |
2002年 | 47424篇 |
2001年 | 92696篇 |
2000年 | 94509篇 |
1999年 | 77357篇 |
1998年 | 19781篇 |
1997年 | 17309篇 |
1996年 | 17428篇 |
1995年 | 16779篇 |
1994年 | 15319篇 |
1993年 | 14092篇 |
1992年 | 57399篇 |
1991年 | 55292篇 |
1990年 | 52992篇 |
1989年 | 50764篇 |
1988年 | 46152篇 |
1987年 | 44952篇 |
1986年 | 42237篇 |
1985年 | 40014篇 |
1984年 | 29367篇 |
1983年 | 24924篇 |
1982年 | 13921篇 |
1979年 | 25555篇 |
1978年 | 17599篇 |
1977年 | 14918篇 |
1976年 | 13890篇 |
1975年 | 14589篇 |
1974年 | 17649篇 |
1973年 | 16956篇 |
1972年 | 15684篇 |
1971年 | 14469篇 |
1970年 | 13437篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
3.
4.
Hyun Jong Choi Jong Ho Moon Yun Nah Lee Hyun Su Kim Ji Su Ha Tae Hoon Lee Sang‐Woo Cha Young Deok Cho Sang‐Heum Park 《Digestive endoscopy》2015,27(7):772-775
Direct peroral cholangioscopy (POC) using an ultra‐slim upper endoscope is one modality of POC for intraductal endoscopic evaluation and treatment of the bile duct. Choledochoduodenostomy (CDS) is one modality of biliary bypass surgery that provides a new route to the bile duct. We carried out direct POC using an ultra‐slim upper endoscope without the use of accessories in 10 patients (four sump syndromes, three bile duct strictures and three intrahepatic duct stones) previously undergoing surgical CDS. Direct POC was successful in all patients. The use of an intraductal balloon catheter was required in one patient for advancement of the endoscope into the bile duct. Distal bile ducts with sump syndromes were cleared using baskets and water irrigation under direct POC. Cholangiocarcinoma was diagnosed in one patient with hilar bile duct stricture after cholangioscopic evaluation and a targeting forceps biopsy under direct POC. Intrahepatic duct stones were successfully extracted after intraductal fragmentation under direct POC. Oozing bleeding occurred during intraductal lithotripsy but stopped spontaneously. Direct POC using an ultra‐slim upper endoscope without the assistance of accessories can easily be carried out in patients undergoing CDS. 相似文献
5.
6.
Wojciech Szychta M.D. Ph.D. Gheorghe Cerin M.D. Ph.D. F.E.S.C. Bogdan Adrian Popa M.D. Armienti Felice M.D. Guido Lanzillo M.D. Ph.D. Marco Diena M.D. Grzegorz Opolski M.D. Ph.D. F.E.S.C. 《Echocardiography (Mount Kisco, N.Y.)》2015,32(6):1040-1043
Sinus venosus atrial septal defect (SV‐ASD) usually coexists with partial anomalous pulmonary vein connection (PAPVC). It is a difficult diagnosis in transthoracic echocardiography (TTE) due to eccentric position of defects. We present a rare case of atypical anatomical variation in PAPVC, which was never described before. Two right pulmonary veins drained into superior vena cava, which overrode SV‐ASD and interatrial septum, a third pulmonary vein into the right atrium. Complete diagnosis could not be set after TTE, nor transesophageal echocardiography, whereas angio‐CT was finally conclusive. This diagnostic approach allowed the surgical planning. 相似文献
7.
Improvement in Tricuspid Annular Plane Systolic Excursion with Pulmonary Hypertension Therapy in Pediatric Patients 下载免费PDF全文
8.
9.
Well‐being,health and fitness of children who use wheelchairs: Feasibility study protocol to develop child‐centred ‘keep‐fit’ exercise interventions 下载免费PDF全文
10.
Interprofessional collaboration and communication in nursing homes: a qualitative exploration of problems in medical care for nursing home residents – study protocol 下载免费PDF全文