全文获取类型
收费全文 | 40565篇 |
免费 | 2948篇 |
国内免费 | 159篇 |
专业分类
耳鼻咽喉 | 498篇 |
儿科学 | 1331篇 |
妇产科学 | 552篇 |
基础医学 | 4906篇 |
口腔科学 | 524篇 |
临床医学 | 4184篇 |
内科学 | 8927篇 |
皮肤病学 | 699篇 |
神经病学 | 3875篇 |
特种医学 | 1658篇 |
外科学 | 7172篇 |
综合类 | 343篇 |
一般理论 | 81篇 |
预防医学 | 3009篇 |
眼科学 | 1137篇 |
药学 | 2134篇 |
中国医学 | 38篇 |
肿瘤学 | 2604篇 |
出版年
2023年 | 349篇 |
2022年 | 276篇 |
2021年 | 1397篇 |
2020年 | 772篇 |
2019年 | 1287篇 |
2018年 | 1559篇 |
2017年 | 1065篇 |
2016年 | 1169篇 |
2015年 | 1254篇 |
2014年 | 1752篇 |
2013年 | 2066篇 |
2012年 | 3476篇 |
2011年 | 3468篇 |
2010年 | 1889篇 |
2009年 | 1680篇 |
2008年 | 2803篇 |
2007年 | 2741篇 |
2006年 | 2645篇 |
2005年 | 2500篇 |
2004年 | 2442篇 |
2003年 | 2040篇 |
2002年 | 1880篇 |
2001年 | 237篇 |
2000年 | 163篇 |
1999年 | 224篇 |
1998年 | 311篇 |
1997年 | 272篇 |
1996年 | 190篇 |
1995年 | 216篇 |
1994年 | 160篇 |
1993年 | 161篇 |
1992年 | 103篇 |
1991年 | 107篇 |
1990年 | 79篇 |
1989年 | 70篇 |
1988年 | 49篇 |
1987年 | 60篇 |
1986年 | 58篇 |
1985年 | 58篇 |
1984年 | 71篇 |
1983年 | 83篇 |
1982年 | 102篇 |
1981年 | 74篇 |
1980年 | 52篇 |
1979年 | 26篇 |
1978年 | 31篇 |
1977年 | 31篇 |
1976年 | 20篇 |
1973年 | 19篇 |
1972年 | 17篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Clinical & Experimental Metastasis - 相似文献
2.
3.
4.
5.
Henrik Linde Vilhelmas Bartusevicius Åke Norberg Fredrik Klevebro Jonathan Grip 《Acta anaesthesiologica Scandinavica》2023,67(3):277-283
Background
Esophagectomy is a major surgical intervention and a cornerstone in the treatment of esophageal cancer. There is clinical experience that blood lactate concentration often is elevated in the period following esophagectomy, but the incidence and clinical consequences are sparsely studied.Methods
We extracted data from all patients undergoing esophagectomy at Karolinska University Hospital 2016–2018, n = 153. Most were performed with minimally invasive technique, n = 130. Blood lactate values directly after surgery, highest value during the first night, and morning level on postoperative day one were recorded. Primary outcome was hospital length of stay and secondary outcome was a composite of postoperative infection, additional surgery, or intensive care during the hospital stay. Development of anastomotic leak was analyzed separately.Results
Postoperative hyperlactatemia was common as 93% of patients had peak lactate concentration >1.6 mmol/L and 27% >3.5 mmol/L in the first night following operation. Median hospital length of stay was 14 days. Blood lactate showed a weak correlation to hospital stay and intensive care the morning following surgery, but not at arrival to postoperative ward. There were no statistical differences between those with and without anastomotic leak at any of the time points. Elevated lactate in the first 12–16 h postoperatively was related to surgical factors (open technique, surgery time, and perioperative bleeding) but not to patient related factors (ASA-class, Charlson comorbidity index, sex, age) or cumulative fluid balance.Conclusion
In conclusion, elevated blood lactate in the immediate time following esophagectomy showed a weak association to intensive care and length of stay but not anastomotic leak. 相似文献6.
Anand Rajan Peerapol Wangrattanapranee Jonathan Kessler Trilokesh Dey Kidambi James H Tabibian 《World journal of gastrointestinal surgery》2022,14(4):286-303
Gastrostomy tube placement is a procedure that achieves enteral access for nutrition, decompression, and medication administration. Preprocedural evaluation and selection of patients is necessary to provide optimal benefit and reduce the risk of adverse events (AEs). Appropriate indications, contraindications, ethical considerations, and comorbidities of patients referred for gastrostomy placement should be weighed and balanced. Additionally, endoscopist should consider either a transoral or transabdominal approach is appropriate, and radiologic or surgical gastrostomy tube placement is needed. However, medical history, physical examination, and imaging prior to the procedure should be considered to tailor the appropriate approach and reduce the risk of AEs. 相似文献
7.
Clinical & Experimental Metastasis - 相似文献
8.
Medicine, Health Care and Philosophy - Over the last 50 years, the term professionalism has undergone a widespread expansion in its use and a semantic shift in its meaning. As a result, it... 相似文献
9.
10.
Dursun Furkan Elshabrawy Ahmed Wang Hanzhang Rodriguez Ronald Liss Michael A. Kaushik Dharam Gelfond Jonathan Mansour Ahmed M. 《International journal of clinical oncology / Japan Society of Clinical Oncology》2022,27(6):1068-1076
International Journal of Clinical Oncology - A recently reported phase III randomized trial comparing open and minimally invasive hysterectomy showed significantly higher rates of local recurrence... 相似文献