全文获取类型
收费全文 | 422篇 |
免费 | 44篇 |
国内免费 | 8篇 |
专业分类
儿科学 | 13篇 |
妇产科学 | 11篇 |
基础医学 | 32篇 |
口腔科学 | 37篇 |
临床医学 | 43篇 |
内科学 | 143篇 |
皮肤病学 | 10篇 |
神经病学 | 26篇 |
特种医学 | 72篇 |
外科学 | 22篇 |
综合类 | 8篇 |
预防医学 | 21篇 |
眼科学 | 4篇 |
药学 | 26篇 |
肿瘤学 | 6篇 |
出版年
2024年 | 1篇 |
2023年 | 2篇 |
2022年 | 2篇 |
2020年 | 2篇 |
2019年 | 5篇 |
2018年 | 4篇 |
2017年 | 2篇 |
2016年 | 4篇 |
2015年 | 10篇 |
2014年 | 6篇 |
2013年 | 18篇 |
2012年 | 5篇 |
2011年 | 8篇 |
2010年 | 19篇 |
2009年 | 15篇 |
2008年 | 12篇 |
2007年 | 13篇 |
2006年 | 3篇 |
2005年 | 4篇 |
2004年 | 3篇 |
2003年 | 5篇 |
2002年 | 5篇 |
2001年 | 5篇 |
1999年 | 5篇 |
1998年 | 21篇 |
1997年 | 36篇 |
1996年 | 33篇 |
1995年 | 20篇 |
1994年 | 24篇 |
1993年 | 20篇 |
1992年 | 4篇 |
1991年 | 11篇 |
1990年 | 8篇 |
1989年 | 15篇 |
1988年 | 15篇 |
1987年 | 12篇 |
1986年 | 14篇 |
1985年 | 11篇 |
1984年 | 6篇 |
1983年 | 16篇 |
1982年 | 18篇 |
1981年 | 15篇 |
1980年 | 6篇 |
1979年 | 2篇 |
1978年 | 2篇 |
1977年 | 1篇 |
1976年 | 3篇 |
1975年 | 2篇 |
1970年 | 1篇 |
排序方式: 共有474条查询结果,搜索用时 15 毫秒
91.
Three children aged 17 months to 17 years developed right-sided peripheral lung abscesses. Clinical signs were fever and cough. Laboratory cultures were negative, and the patients did not respond to appropriate antibiotic coverage. Under fluoroscopic guidance, purulent material was removed from the abscesses by needle aspiration. The patients became afebrile within 24 hours; none suffered complications of bleeding or pneumothorax. Cultures of the aspirate were positive for microorganisms sensitive to the prescribed treatments. A simple aspiration technique is described and proposed as useful for selected patients when surgical drainage is recommended. There was no morbidity in our cases, and recovery from a typically prolonged course was shortened by the procedure. 相似文献
92.
功能性消化不良者胃排空功能和体表胃电变化的研究 总被引:1,自引:0,他引:1
以SPECT胃排空检测技术和WCDF-4B胃电分析仪检测了12例FD患者液、固体食物胃排空和体表胃电图的变化。结果显示:FD患者的液体胃排空与对照组无明显差异,仅在摄食后比对照组更多地分布于远端胃内:固体食物的排模式发生变化,表现为初始排空较快,继后的排空延缓,7例半排空时间延长。 相似文献
93.
94.
95.
96.
Packed red cell units (n = 10) were filtered and divided equally. One-half unit from each donor was irradiated (x) (3500 cGy). On Days 0, 14, 28, and 42, ATP, K+, Na+, lactate dehydrogenase (LDH), plasma-free hemoglobin (PFH), and pH were determined. The reduction in ATP was greater in the irradiated than the nonirradiated (y) units by Day 42 (mean x-y: -70, p = 0.0005). The increase in K+ was greater in the irradiated than nonirradiated units on Days 14, 28, and 42 (mean x-y: 17-20, p = 0.0001). Decrease in pH and increases in LDH and PFH were significant (p less than 0.05) on Day 42 only. K+ increases added only 1.7 to 2.0 mmol per unit, a difference felt to be clinically insignificant. The changes noted in ATP, pH, LDH, and PFH are significant but minimal on Day 42 and imply that viability changes would also be minimal. These biochemical data support the storage of irradiated units for at least 28 days. 相似文献
97.
98.
99.
Interdisciplinary Discrepancies Between Parenteral Nutrition Macronutrient Prescribing and Recommendations: Is Body Mass Index a Factor? 下载免费PDF全文
Katie L. Elliott MS RD CDE Jay Kandiah PhD RD CD Todd A. Walroth PharmD BCPS 《JPEN. Journal of parenteral and enteral nutrition》2017,41(5):759-765
Background: Formal nutrition training in medical schools and residencies is lacking and needed. Registered dietitians (RDs) are formally trained in nutrition support and considered experts in the nutrition field. Our purpose was to examine prescribing and recommending discrepancies of parenteral nutrition macronutrients between medical residents (MRs) and RDs and compare results with the ASPEN clinical care guidelines. We also looked at discrepancies among obese patients, due to their increased risk of mortality. Materials and Methods: The primary end point of this retrospective review was discrepancies in nonprotein calories (NPCs) and grams of protein (PRO) between MRs and RDs. The secondary end point was discrepancies in NPCs and PRO between MRs and RDs among patients stratified by body mass index category. Results: MRs prescribed 300 NPCs more versus RDs (P < .001). When compared with RDs, MRs prescribed fewer NPCs for underweight patients and more for obese patients (P < .001). The same analysis found that the PRO discrepancies significantly varied by body mass index classification as well (P = .022). When these results were compared with the ASPEN clinical care guidelines, RDs adhered closer to the guidelines than did MRs in terms of permissive underfeeding of obese patients. Conclusion: It is widely accepted that MRs are in need of increased formal training, and the results of our study confirm this need and suggest a short‐term solution of increasing order‐writing privileges for the RD. RDs with this privilege may adhere more closely to clinical care guidelines and therefore increase patient safety. 相似文献