全文获取类型
收费全文 | 161003篇 |
免费 | 10707篇 |
国内免费 | 1213篇 |
专业分类
耳鼻咽喉 | 2255篇 |
儿科学 | 3019篇 |
妇产科学 | 3741篇 |
基础医学 | 24034篇 |
口腔科学 | 3342篇 |
临床医学 | 15217篇 |
内科学 | 30755篇 |
皮肤病学 | 4342篇 |
神经病学 | 12046篇 |
特种医学 | 8088篇 |
外科学 | 21911篇 |
综合类 | 2158篇 |
现状与发展 | 5篇 |
一般理论 | 81篇 |
预防医学 | 9719篇 |
眼科学 | 4307篇 |
药学 | 13639篇 |
中国医学 | 1597篇 |
肿瘤学 | 12667篇 |
出版年
2023年 | 985篇 |
2022年 | 2740篇 |
2021年 | 4826篇 |
2020年 | 2465篇 |
2019年 | 3585篇 |
2018年 | 4403篇 |
2017年 | 3231篇 |
2016年 | 4189篇 |
2015年 | 5638篇 |
2014年 | 6909篇 |
2013年 | 8371篇 |
2012年 | 12646篇 |
2011年 | 12278篇 |
2010年 | 7248篇 |
2009年 | 6065篇 |
2008年 | 9257篇 |
2007年 | 9119篇 |
2006年 | 8379篇 |
2005年 | 7982篇 |
2004年 | 7118篇 |
2003年 | 6184篇 |
2002年 | 5373篇 |
2001年 | 4377篇 |
2000年 | 4026篇 |
1999年 | 3263篇 |
1998年 | 1309篇 |
1997年 | 989篇 |
1996年 | 949篇 |
1995年 | 862篇 |
1994年 | 750篇 |
1993年 | 642篇 |
1992年 | 1572篇 |
1991年 | 1569篇 |
1990年 | 1353篇 |
1989年 | 1236篇 |
1988年 | 1154篇 |
1987年 | 1030篇 |
1986年 | 1010篇 |
1985年 | 882篇 |
1984年 | 644篇 |
1983年 | 563篇 |
1982年 | 399篇 |
1981年 | 377篇 |
1980年 | 338篇 |
1979年 | 519篇 |
1978年 | 406篇 |
1977年 | 388篇 |
1976年 | 342篇 |
1974年 | 358篇 |
1973年 | 327篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
53.
54.
55.
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56.
57.
Clinical clues for differential diagnosis between verruca plana and verruca plana‐like seborrheic keratosis 下载免费PDF全文
Won‐Jeong Kim Won‐Ku Lee Margaret Song Hoon‐Soo Kim Hyun‐Chang Ko Byung‐Soo Kim Moon‐Bum Kim 《The Journal of dermatology》2015,42(4):373-377
Sometimes the clinical differentiation between verruca plana (VP) and VP‐like seborrheic keratosis (SK) could be challenged. However, there have been no studies on this issue to date. The aim of this study was to elucidate clinical and dermoscopic differences between these two diseases, and also to suggest a diagnostic algorithm of VP and VP‐like SK without skin biopsy. The patients who had lesions clinically considered as VP or VP‐like SK were the target of our study. We took clinical and dermoscopic photos with informed consent and conducted a questionnaire. All patients had their diagnoses confirmed by biopsy. Thirty‐three patients were enrolled in our study. Seventeen patients were finally diagnosed with VP (51.5%) and 16 patients with VP‐like SK (48.5%). In clinical findings, VP‐like SK showed significantly more scattered distribution than VP (P = 0.039), which exhibited more clustered or grouped distribution (P = 0.039). In dermoscopic findings, brain‐like appearance was more commonly observed in VP‐like SK (P = 0.003) whereas VP showed more red dots or globular vessels (P = 0.017) and even‐colored light brown to yellow patch (P < 0.001). Sex, onset age, the size of each lesion, location, color and shape showed no significant differences between them (P > 0.05). Based on our results, we suggest a diagnostic algorithm using Koebner's phenomenon, dermoscopic findings, distribution of each lesion and biopsy for multiple VP‐like lesions in adults, and we think it will be a very useful diagnostic tool in daily clinical dermatological practice. 相似文献
58.
59.
Clinical usefulness of intraductal ultrasonography for the management of acute biliary pancreatitis 下载免费PDF全文
60.
Fluid is usually restricted during thoracic surgery, and vasoactive agents are often administered to maintain blood pressure. One-lung ventilation (OLV) decreases arterial oxygenation; thus oxygen delivery to the brain can be decreased. In this study, we compared phenylephrine and dopamine with respect to maintaining cerebral oxygenation during OLV in major thoracic surgery.Sixty-three patients undergoing lobectomies were randomly assigned to the dopamine (D) or phenylephrine (P) group. The patients’ mean arterial pressure was maintained within 20% of baseline by a continuous infusion of dopamine or phenylephrine. Maintenance fluid was kept at 5 mL/kg/h. The depth of anesthesia was maintained with desflurane 1MAC and remifentanil infusion under bispectral index guidance. Regional cerebral oxygen saturation (rScO2) and hemodynamic variables were recorded using near-infrared spectroscopy and esophageal cardiac Doppler.The rScO2 was higher in the D group than the P group during OLV (OLV 60 min: 71 ± 6% vs 63 ± 12%; P = 0.03). The number of patients whose rScO2 dropped more than 20% from baseline was 0 and 6 in the D and P groups, respectively (P = 0.02). The D group showed higher cardiac output, but lower mean arterial pressure than the P group (4.7 ± 1.0 vs 3.9 ± 1.2 L/min; 76.7 ± 8.1 vs 84.5 ± 7.5 mm Hg; P = 0.02, P = 0.02). Among the variables, age, hemoglobin concentration, and cardiac output were associated with rScO2 by correlation analysis.Dopamine was superior to phenylephrine in maintaining cerebral oxygenation during OLV in thoracic surgery. 相似文献