全文获取类型
收费全文 | 5362篇 |
免费 | 601篇 |
国内免费 | 52篇 |
专业分类
耳鼻咽喉 | 58篇 |
儿科学 | 177篇 |
妇产科学 | 153篇 |
基础医学 | 497篇 |
口腔科学 | 78篇 |
临床医学 | 688篇 |
内科学 | 1429篇 |
皮肤病学 | 112篇 |
神经病学 | 483篇 |
特种医学 | 335篇 |
外国民族医学 | 1篇 |
外科学 | 746篇 |
综合类 | 62篇 |
一般理论 | 1篇 |
预防医学 | 299篇 |
眼科学 | 177篇 |
药学 | 206篇 |
中国医学 | 3篇 |
肿瘤学 | 510篇 |
出版年
2023年 | 70篇 |
2022年 | 47篇 |
2021年 | 93篇 |
2020年 | 142篇 |
2019年 | 79篇 |
2018年 | 150篇 |
2017年 | 130篇 |
2016年 | 132篇 |
2015年 | 135篇 |
2014年 | 186篇 |
2013年 | 222篇 |
2012年 | 219篇 |
2011年 | 225篇 |
2010年 | 176篇 |
2009年 | 192篇 |
2008年 | 212篇 |
2007年 | 220篇 |
2006年 | 215篇 |
2005年 | 195篇 |
2004年 | 175篇 |
2003年 | 184篇 |
2002年 | 167篇 |
2001年 | 155篇 |
2000年 | 146篇 |
1999年 | 151篇 |
1998年 | 126篇 |
1997年 | 130篇 |
1996年 | 102篇 |
1995年 | 92篇 |
1994年 | 77篇 |
1993年 | 79篇 |
1992年 | 103篇 |
1991年 | 95篇 |
1990年 | 100篇 |
1989年 | 118篇 |
1988年 | 109篇 |
1987年 | 74篇 |
1986年 | 66篇 |
1985年 | 68篇 |
1984年 | 57篇 |
1983年 | 38篇 |
1982年 | 55篇 |
1981年 | 43篇 |
1980年 | 32篇 |
1979年 | 39篇 |
1977年 | 39篇 |
1974年 | 29篇 |
1973年 | 35篇 |
1972年 | 31篇 |
1969年 | 32篇 |
排序方式: 共有6015条查询结果,搜索用时 0 毫秒
91.
Hamady ZZ Malik HZ Finch R Adair R Al-Mukhtar A Prasad KR Toogood GJ Lodge JP 《Annals of surgical oncology》2006,13(11):1493-1499
Background Many colorectal liver metastasis patients are denied surgical resection on the basis of tumour size. The aim of this study was to explore the impact of metastasis size on modern liver resection.Methods Using a prospectively collected database, this was a retrospective analysis of 484 consecutive patients who underwent liver resection for colorectal liver metastases between 1993 and 2003. The cohort was divided into two groups: smaller metastases (<8 cm) and larger metastases (≥ 8 cm). Those with larger metastases were then further stratified into big metastases (8–12 cm) and giant metastases (>12 cm). Demographic, pathological, surgical technique and outcome data were compared between the groups.Results There were 88 (18%) patients with metastases measuring 8 cm or larger. There was an association between higher carcinoembryonic antigen (CEA) and cancer antigen (CA) 19-9 levels and larger metastases. The actuarial 5-year survival for patients with larger metastases was 38% compared with 42% for smaller metastases (not statistically significant). Patients with giant metastases had poorer overall and disease-free survival (both nonsignificant) compared with those with big metastases: 29% and 28% at 5 years, respectively.Conclusion Patients with colorectal liver metastasis greater than 8 cm and up to 12 cm in size should not be treated differently from those with smaller lesions. 相似文献
92.
93.
94.
Wearable monitors for patients following discharge from an intensive care unit: practical lessons learnt from an observational study 下载免费PDF全文
95.
96.
Nagaraja Moorthy DM Rajiv Ananthakrishna DM Dattatreya P. V. Rao DM Satvic C. Manjunath DM Manjunath C. Nanjappa DM 《Echocardiography (Mount Kisco, N.Y.)》2018,35(3):388-390
Intermittent dysfunction of mechanical mitral valve prosthesis is an uncommon condition. It carries serious clinical implications if unrecognized. Here, we present a case of a 28‐year‐old female with a history of rheumatic multivalvular disease, for which she had undergone double valve replacement and tricuspid annuloplasty. Six months later, she presented with heart failure. Clinical examination revealed intermittent loss of closing clicks followed by a pansystolic murmur at the apex, suggestive of mitral prosthetic valve dysfunction. We highlight the echocardiographic findings of paroxysmal mitral valvular regurgitation secondary to prosthetic valve malfunction secondary to prosthetic valve thrombosis. 相似文献
97.
False positive retroaortic left circumflex coronary artery in a patient with atrial septal defect 下载免费PDF全文
Saurabh Kumar Gupta MD DM Anunay Gupta MD DM Sivasubramanian Ramakrishnan MD DM Shyam S. Kothari MD DM 《Echocardiography (Mount Kisco, N.Y.)》2017,34(5):799-801
Retroaortic course of coronary artery is a relative contraindication for device closure of an atrial septal defect. In this brief report, we demonstrate, for the first time, inferior aortic recess mimicking retroaortic left circumflex coronary artery in a patient with atrial septal defect. This distinction is important to avoid spurious diagnosis of anomalous coronary artery denying patient a chance of nonsurgical closure of atrial septal defect. 相似文献
98.
Roopali Khanna MD DM Pujan Shah MD Mousam Dey MD Pravin K. Goel MD DM Puneet Goyal MD DM Shantanu Pandey MD McH 《Echocardiography (Mount Kisco, N.Y.)》2017,34(7):1107-1109
Sinus of Valsalva aneurysm is a rare congenital cardiac abnormality and is usually diagnosed when it ruptures. An asymptomatic 55‐year‐old male of unruptured sinus of Valsalva aneurysm of noncoronary cusp was on medical follow‐up. At 2‐year follow‐up, there was thrombus formation in the aneurysm, mimicking right atrium tumor on 2D transthoracic echocardiography. Cardiac computed tomography showed filling defect in the aneurysm suggestive of thrombus. Considering the high risk of systemic emboli surgery was performed, and aneurysm was repaired with Dacron patch. 相似文献
99.
Assi Levi Dan Ben Amitai Daniel Mimouni Yael A. Leshem Ofir Arzi Moshe Lapidoth 《Lasers in medical science》2018,33(3):597-601
The verrucous epidermal nevus (VEN) is the most common type of epidermal nevi. As lesions can be disfiguring, treatment is often sought. Many therapeutic approaches have been reported, with variable efficacy and safety. Picosecond (PS) lasers are novel laser devices designated to target small chromophores. A side effect of these lasers is blistering due to epidermal-dermal separation. We aimed to harness this side effect of the PS lasers to treat patients with VEN. The purpose of this study was to report our experience treating VEN using a PS 532-nm laser. We present a retrospective case series of six patients with large VEN who were treated using a PS 532-nm laser (2–6 treatments, 8–10 weeks apart). Response in clinical photographs was assessed by two independent dermatologists and graded on a scale of 0 (exacerbation) to 4 (76–100% improvement). Patient satisfaction was recorded on a scale of 1–5. All patients demonstrated significant improvement. Average improvement was 3.7 on the quartile scale of improvement. Patient satisfaction rate averaged 4.7. The PS 532-nm laser is a promising novel modality for the treatment of large VEN. 相似文献
100.