全文获取类型
收费全文 | 1883篇 |
免费 | 79篇 |
国内免费 | 9篇 |
专业分类
耳鼻咽喉 | 13篇 |
儿科学 | 72篇 |
妇产科学 | 31篇 |
基础医学 | 212篇 |
口腔科学 | 55篇 |
临床医学 | 149篇 |
内科学 | 368篇 |
皮肤病学 | 35篇 |
神经病学 | 78篇 |
特种医学 | 176篇 |
外科学 | 168篇 |
综合类 | 125篇 |
预防医学 | 105篇 |
眼科学 | 80篇 |
药学 | 183篇 |
中国医学 | 9篇 |
肿瘤学 | 112篇 |
出版年
2023年 | 13篇 |
2022年 | 42篇 |
2021年 | 58篇 |
2020年 | 41篇 |
2019年 | 51篇 |
2018年 | 60篇 |
2017年 | 29篇 |
2016年 | 43篇 |
2015年 | 50篇 |
2014年 | 56篇 |
2013年 | 73篇 |
2012年 | 121篇 |
2011年 | 119篇 |
2010年 | 81篇 |
2009年 | 73篇 |
2008年 | 103篇 |
2007年 | 93篇 |
2006年 | 65篇 |
2005年 | 59篇 |
2004年 | 62篇 |
2003年 | 53篇 |
2002年 | 47篇 |
2001年 | 60篇 |
2000年 | 53篇 |
1999年 | 57篇 |
1998年 | 40篇 |
1997年 | 22篇 |
1996年 | 22篇 |
1995年 | 11篇 |
1994年 | 15篇 |
1993年 | 14篇 |
1992年 | 19篇 |
1991年 | 28篇 |
1990年 | 21篇 |
1989年 | 30篇 |
1988年 | 24篇 |
1987年 | 18篇 |
1986年 | 15篇 |
1985年 | 18篇 |
1984年 | 11篇 |
1983年 | 12篇 |
1979年 | 15篇 |
1977年 | 9篇 |
1976年 | 8篇 |
1975年 | 11篇 |
1974年 | 7篇 |
1973年 | 4篇 |
1972年 | 6篇 |
1971年 | 4篇 |
1968年 | 5篇 |
排序方式: 共有1971条查询结果,搜索用时 15 毫秒
51.
Bipadabhanjan Mallick Narendra Dhaka Pankaj Gupta Ajay Gulati Sarthak Malik Saroj K. Sinha Thakur D. Yadav Vikas Gupta Rakesh Kochhar 《Pancreatology》2018,18(7):727-733
Background and objectives
Percutaneous catheter drainage (PCD) is used as a first step in the management of symptomatic fluid collections in patients with acute pancreatitis (AP). We aimed to compare the outcome of patients with acute necrotic collection (ANC) and those with walled-off necrosis (WON), who had undergone PCD as a part of management of AP.Methods
Consecutive patients of AP with symptomatic ANC or WON undergoing PCD were evaluated. Primary outcome measures were need for additional surgical necrosectomy and mortality. Secondary outcome measures were need for up-gradation of first PCD, need for additional drain, in-hospital as well as total duration of PCD and length of hospital stay.Results
Indications of PCD in 375 patients (258 with ANC and 117 with WON) were suspected infected pancreatic necrosis (n?=?214), persistent organ failure (n?=?117) and pressure symptoms (n?=?44). Need for additional surgical necrosectomy was seen in 14% patients with ANC and in 12% of patients with WON (p?=?0.364) and mortality was 19% in patients with ANC as compared to 13.7% in those with WON (p?=?0.132). There was no significant difference in the secondary outcome parameters between patients who underwent PCD for ANC or WON. Complications of PCD were comparable between patients with ANC and WON except development of external pancreatic fistula which occurred more often in patients with WON than in those with ANC (24.4% versus 34.2% respectively, p?=?0.034).Conclusion
Persistent organ failure in more often an indication of PCD in patients with ANC than in WON and suspected infection is more commonly an indication in WON than in ANC. Early PCD is as efficacious and safe as delayed PCD. 相似文献52.
Voros S Nanda NC Thakur AC Narayan VK Samal AK 《Echocardiography (Mount Kisco, N.Y.)》1999,16(1):35-39
We report the first case of echocardiographically detected Lambl's excrescences on the pulmonary valve in a 72-year-old man who was referred for transesophageal echocardiography as a part of an evaluation for ischemic stroke. A total of four excrescences were noted on the arterial aspect of the pulmonary valve; two of them were on the anterior cusp, one was on the left cusp, and one was on the right cusp. The excrescence on the left cusp was the largest, measuring 5 mm in length. These valvular strands (Lambl's excrescences) represented an incidental finding and were not associated with any disease process. 相似文献
53.
Thomas Klopstock MD Aleksandar Videnovic MD Almut Turid Bischoff MD Cecilia Bonnet MD Laura Cif MD Cynthia Comella MD Marta Correa-Vela MD Maria L. Escolar MD Jamie L. Fraser MD Victoria Gonzalez MD Neal Hermanowicz MD Robert Jech MD Hyder A. Jinnah MD Tomasz Kmiec MD Anthony Lang MD Maria J. Martí MD Saadet Mercimek-Andrews MD Migvis Monduy MD Graeme A.M. Nimmo MBBS Belen Perez-Dueñas MD Helle Cecilie Viekilde Pfeiffer MD Lluis Planellas MD Emmanuel Roze MD Nivedita Thakur MD Laura Tochen MD Nora Vanegas-Arroyave MD Giovanna Zorzi MD Colleen Burns PhD Feriandas Greblikas MD 《Movement disorders》2021,36(6):1342-1352
54.
55.
Gupta Manisha Krishan Pawan Kaur Amarjot Arora Sandeep Trehanpati Nirupma Singh Thakur Gurjeet Bedi Onkar 《Inflammation research》2021,70(7):765-776
Inflammation Research - Non-alcoholic fatty liver disease (NAFLD) is a multifaceted disease allied with various metabolic disorders, obesity and dysbiosis. Gut microbiota plays an influential role... 相似文献
56.
Breast cancer subtype intertumor heterogeneity: MRI‐based features predict results of a genomic assay
下载免费PDF全文
![点击此处可从《Journal of magnetic resonance imaging : JMRI》网站下载免费的PDF全文](/ch/ext_images/free.gif)
57.
Rengarajan Rajagopal Nitin Mishra Nitin Yadav Vikas Jhanwar Ajit Thakur Naima Mannan 《African Journal of Paediatric Surgery》2015,12(2):140-142
Background:
To evaluate and compare the ultrasound (US) features of transient small bowel intussusception (SBI) with those which required surgical management.Materials and Methods:
US features of 26 children with 32 intussusceptions from January 2014 to August 2014 were recorded and compared with follow-up imaging or surgical findings.Results:
Transient SBI when compared to surgically managed intussusception has shorter length of intussusception (mean 2.25 cm, range 1.8-4.5 cm vs. mean 5.6 cm, range, 2.3-7.8 cm), smaller transverse diameter (mean, 1.2 cm, range 0.8-2.3 cm vs. mean, 3.3 cm, range 2.9-5.4 cm) and thin wall (mean, 3.3 mm, 2.3-4.9 mm vs. mean, 6.8 mm, range, 4.3-11.2 mm). Four out of five surgically managed intussusceptions were associated with the lead point while none of the transient SBI had any lead point. Peristalsis was absent in all surgically managed intussusceptions.Conclusion:
Transient SBI is associated with a shorter length of intussusception, smaller transverse diameter, thin walls, absence of the lead point and visible peristalsis. All these findings may help in distinguishing it from those requiring surgical management.Key words: Children, surgically managed small bowel intussusception, transient small bowel intussusception, ultrasound 相似文献58.
Jeremy YC Teoh Steffi KK Yuen James HL Tsu Charles KW Wong Brian SH Ho Ada TL Ng Wai-Kit Ma Kwan-Lun Ho Ming-Kwong Yiu 《Asian journal of andrology》2015,17(5):821-825
We investigated the prostate cancer detection rates upon transrectal ultrasound (TRUS)-guided biopsy in relation to digital rectal examination (DRE) and prostate-specific antigen (PSA), and risk factors of prostate cancer detection in the Chinese population. Data from all consecutive Chinese men who underwent first TRUS-guided prostate biopsy from year 2000 to 2013 was retrieved from our database. The prostate cancer detection rates with reference to DRE finding and PSA level of < 4, 4–10, 10.1–20, 20.1–50 and > 50 ng ml−1 were investigated. Multivariate logistic regression analyses were performed to investigate for potential risk factors of prostate cancer detection. A total of 2606 Chinese men were included. In patients with normal DRE, the cancer detection rates were 8.6%, 13.4%, 21.8%, 41.7% and 85.2% in patients with PSA < 4, 4–10, 10.1–20, 20.1–50 and > 50 ng ml−1 respectively. In patients with abnormal DRE, the cancer detection rates were 12.4%, 30.2%, 52.7%, 80.6% and 96.4% in patients with PSA < 4, 4–10, 10.1–20, 20.1–50 and > 50 ng ml−1 respectively. Older age, smaller prostate volume, larger number of biopsy cores, presence of abnormal DRE finding and higher PSA level were associated with increased risk of prostate cancer detection upon multivariate logistic regression analyses (P < 0.001). Chinese men appeared to have lower prostate cancer detection rates when compared to the Western population. Taking the different risk factors into account, an individualized approach to the decision of TRUS-guided biopsy can be adopted. 相似文献
59.
Kamia Thakur MD Tamim M. Nazif MD Omar K. Khalique MD FACC FASE FSCCT Jean‐Michel Paradis MD Kishore J. Harjai MD 《Journal of interventional cardiology》2018,31(5):543-552