全文获取类型
收费全文 | 21931篇 |
免费 | 1474篇 |
国内免费 | 251篇 |
专业分类
耳鼻咽喉 | 372篇 |
儿科学 | 318篇 |
妇产科学 | 331篇 |
基础医学 | 3445篇 |
口腔科学 | 283篇 |
临床医学 | 1754篇 |
内科学 | 4434篇 |
皮肤病学 | 650篇 |
神经病学 | 1662篇 |
特种医学 | 1470篇 |
外科学 | 3145篇 |
综合类 | 131篇 |
现状与发展 | 1篇 |
一般理论 | 11篇 |
预防医学 | 990篇 |
眼科学 | 663篇 |
药学 | 1991篇 |
中国医学 | 247篇 |
肿瘤学 | 1758篇 |
出版年
2023年 | 95篇 |
2022年 | 325篇 |
2021年 | 667篇 |
2020年 | 355篇 |
2019年 | 532篇 |
2018年 | 663篇 |
2017年 | 505篇 |
2016年 | 762篇 |
2015年 | 1006篇 |
2014年 | 1237篇 |
2013年 | 1316篇 |
2012年 | 1956篇 |
2011年 | 1944篇 |
2010年 | 1241篇 |
2009年 | 999篇 |
2008年 | 1305篇 |
2007年 | 1250篇 |
2006年 | 1108篇 |
2005年 | 1049篇 |
2004年 | 871篇 |
2003年 | 700篇 |
2002年 | 676篇 |
2001年 | 309篇 |
2000年 | 331篇 |
1999年 | 287篇 |
1998年 | 133篇 |
1997年 | 119篇 |
1996年 | 120篇 |
1995年 | 87篇 |
1994年 | 64篇 |
1993年 | 56篇 |
1992年 | 150篇 |
1991年 | 160篇 |
1990年 | 124篇 |
1989年 | 155篇 |
1988年 | 113篇 |
1987年 | 117篇 |
1986年 | 102篇 |
1985年 | 100篇 |
1984年 | 72篇 |
1983年 | 52篇 |
1982年 | 30篇 |
1981年 | 39篇 |
1980年 | 34篇 |
1979年 | 43篇 |
1978年 | 28篇 |
1975年 | 27篇 |
1974年 | 29篇 |
1973年 | 27篇 |
1972年 | 27篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
Comprehensive evidence regarding the treatment of non-anaemic iron deficiency in patients undergoing valvular heart surgery is lacking. This study aimed to investigate the association between non-anaemic iron deficiency and postoperative outcomes in these patients. We retrospectively analysed 321 patients of which 180 (56%) had iron deficiency (defined as serum ferritin < 100 ng.ml-1 or < 300 ng.ml-1 with transferrin saturation < 20%). While the iron-deficient group had lower pre-operative haemoglobin levels than the non-iron deficient group (median (IQR [range]) 134 (127–141 [120–172]) g.l-1, 143 (133–150 [120–179]) g.l-1, p = 0.001), there was no between-group difference in allogeneic red blood cell transfusion. Median (IQR [range]) days alive and out of hospital at postoperative day 90 was 1 day shorter in the iron-deficient group (80 (77–82 [9–85]) days vs. 81 (79–83 [0–85]) days, p = 0.026). In multivariable analysis, only cardiopulmonary bypass duration (p = 0.032) and intra-operative allogeneic red blood cell transfusion (p = 0.011) were significantly associated with reduced days alive and out of hospital at postoperative day 90. Iron deficiency did not exert any adverse influence on secondary outcomes except length of hospital stay. Our findings indicate that non-anaemic iron deficiency alone is not associated with adverse effects in patients undergoing valvular heart surgery when it does not translate into an increased risk of allogeneic transfusion. 相似文献
2.
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
3.
4.
5.
Jae Hwang Song Chan Kang Deuk Soo Hwang Dong Hun Kang Yong Hwan Kim 《Foot and Ankle Surgery》2019,25(6):748-754
BackgroundThe purpose of this study was to investigate and compare the clinical outcomes of dorsal suspension with those of neurectomy for the treatment of Morton’s neuroma.MethodsWe conducted a retrospective study of dorsal suspension and neurectomy group. The dorsal suspension was performed by dorsal transposition of neuroma over the dorsal transverse ligament after neurolysis. The visual analog scale (VAS), the Foot and Ankle Ability Measure (FAAM), postoperative satisfaction, and complications were evaluated.ResultsBoth groups reported significant pain relief, and there were no significant differences between the groups with respect to postoperative pain. The postoperative FAAM outcomes showed no significant between-group differences. Satisfaction analysis showed ‘excellent’ and ‘good’ results in the dorsal suspension and neurectomy groups (95% and 77.7%, respectively). Complications of numbness and paresthesia reported in the dorsal suspension group (5% and 5%, respectively) were significantly fewer than those of neurectomy group (61.1% and 33.3%, respectively) (both, p < .05).ConclusionsWith its favorable results, dorsal suspension can be another operative option for the treatment of Morton’s neuroma.Level of Evidence: Level III, retrospective comparative case series. 相似文献
6.
7.
Miju Bae Sung Woon Chung Chung Won Lee Up Huh Min Su Kim Seung Hwan Song 《Asian journal of surgery / Asian Surgical Association》2019,42(1):235-239
Background
In Leriche syndrome, postoperative graft thrombosis remains one of the most significant clinical challenges.Methods
We reviewed 51 patients who underwent surgery for aortoiliac occlusive disease at our hospital from January 2007 to December 2014. The factors associated with graft patency were determined using the Cox proportional hazard model.Results
The 2-year prosthetic graft patency rate was 72.5%. Younger age (p = 0.017, Odd ratio (OR) = 1.112), postoperative uncontrolled hypertension (p = 0.044, OR = 3.797), and associated Trans Atlantic Inter-Society Consensus for the Management of Peripheral Arterial Disease II (TASC II) D femoropopliteal lesion (p = 0.008, OR = 11.139) were significantly related factors for prosthetic graft patency after surgical repair. The existing comorbidities of the patients that indicated the need for axillo-bifemoral bypass seemed to be related to lower graft patency or other complications.Conclusions
For better graft patency after an open surgical repair of Leriche syndrome, strict postoperative hypertension control and distal run-off resolution are necessary. 相似文献8.
Clinical usefulness of intraductal ultrasonography for the management of acute biliary pancreatitis
下载免费PDF全文
![点击此处可从《Journal of gastroenterology and hepatology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
9.
10.
Three‐Dimensional Echocardiographic Evaluation of Mitral Apparatus during Preload Manipulation in Patients with Hypertrophic Cardiomyopathy
下载免费PDF全文
![点击此处可从《Echocardiography (Mount Kisco, N.Y.)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Hyemoon Chung M.D. Ji Hyun Yoon M.D. Young Won Yoon M.D. Ph.D. Ji Young Chung B.N. Jung‐Joon Cha M.D. Jong‐Youn Kim M.D. Ph.D. Pil‐Ki Min M.D. Ph.D. Byoung‐Kwon Lee M.D. Ph.D. Bum‐Kee Hong M.D. Ph.D. Se‐Joong Rim M.D. Ph.D. Hyuck Moon Kwon M.D. Eui‐Young Choi M.D. Ph.D. 《Echocardiography (Mount Kisco, N.Y.)》2015,32(8):1261-1269