全文获取类型
收费全文 | 23456篇 |
免费 | 827篇 |
国内免费 | 168篇 |
专业分类
耳鼻咽喉 | 548篇 |
儿科学 | 2056篇 |
妇产科学 | 238篇 |
基础医学 | 954篇 |
口腔科学 | 262篇 |
临床医学 | 6376篇 |
内科学 | 2074篇 |
皮肤病学 | 147篇 |
神经病学 | 1079篇 |
特种医学 | 491篇 |
外科学 | 3476篇 |
综合类 | 2129篇 |
预防医学 | 2247篇 |
眼科学 | 148篇 |
药学 | 1434篇 |
17篇 | |
中国医学 | 309篇 |
肿瘤学 | 466篇 |
出版年
2024年 | 31篇 |
2023年 | 746篇 |
2022年 | 1342篇 |
2021年 | 1521篇 |
2020年 | 1192篇 |
2019年 | 1520篇 |
2018年 | 1433篇 |
2017年 | 861篇 |
2016年 | 777篇 |
2015年 | 780篇 |
2014年 | 1983篇 |
2013年 | 1705篇 |
2012年 | 1437篇 |
2011年 | 1619篇 |
2010年 | 1147篇 |
2009年 | 992篇 |
2008年 | 855篇 |
2007年 | 638篇 |
2006年 | 546篇 |
2005年 | 443篇 |
2004年 | 312篇 |
2003年 | 192篇 |
2002年 | 144篇 |
2001年 | 157篇 |
2000年 | 155篇 |
1999年 | 136篇 |
1998年 | 132篇 |
1997年 | 109篇 |
1996年 | 100篇 |
1995年 | 85篇 |
1994年 | 73篇 |
1993年 | 55篇 |
1992年 | 48篇 |
1991年 | 44篇 |
1990年 | 43篇 |
1989年 | 43篇 |
1988年 | 37篇 |
1985年 | 109篇 |
1984年 | 124篇 |
1983年 | 86篇 |
1982年 | 100篇 |
1981年 | 87篇 |
1980年 | 82篇 |
1979年 | 70篇 |
1978年 | 50篇 |
1977年 | 44篇 |
1976年 | 69篇 |
1975年 | 42篇 |
1974年 | 51篇 |
1973年 | 51篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
One hundred and one patients, nursed in an intensive care unit for at least 24h, were monitored for bacterial colonization
and infection. The infection rates were similar to those in other reports. Patients were not generally colonized with common
environmental strains in the unit. Bacterial dissemination between patients was uncommon. No gentamicin resistant gram negative
or Staphylococcus aureus strains were observed, nor methicillin resistant Staphylococcus aureus strains. the hypothesis that these favourable conditions are partly related to the excellent isolation and barrier nursing
facilities in the unit cannot be fully substantiated. 相似文献
73.
上海市闵行区流动人口中的孕产妇保健状况 总被引:3,自引:0,他引:3
通过对上海市闵行区580名外来孕产妇及580名作为对照的本地孕产妇的孕产期保健现况调查分析,表明外来孕产妇缺乏必要的孕产期保健措施,有47.6%的外来孕产妇从未做产前检查,产后保健则完全没有,并由此而造成外来产妇在急产、死产、甚至孕产妇死亡等方面令人忧虑的现状。为适应和促进当前经济发展的新形势,改善流动人口的孕产妇保健状况,应对流动人口中孕产妇保健状况深入研究,并采取相应的措施。 相似文献
74.
This study reports the causes of death after discharge following treatment of life-threatening illness on an Intensive Therapy Unit. Details of survivors discharged between June 1985 and December 1988 were sent to the Registrar General for Scotland who subsequently issued copies of death certificates of those patients who had died between discharge and 1 January 1990. The results show that the commonest causes of death after discharge were malignancy and respiratory failure, although there is wide variation in the post-discharge mortality rates for different diagnostic categories. The admission diagnoses were identical to, or contributed to, the causes of death in 64% of patients who died after discharge. Eighty-five percent of patients who died from the same condition which prompted admission did so within a year following discharge, but after 2 years no deaths were attributed to the admission diagnosis. 相似文献
75.
Quality of life after multiple trauma requiring intensive care 总被引:1,自引:0,他引:1
76.
Glutamine and Other Amino Acid Losses During Continuous Venovenous Hemodiafiltration 总被引:2,自引:0,他引:2
I. Novák V. rámek H. Pittrová Z. Ruavý P. Têinský S. Lacigová M. Eiselt L. Kohoutková E. Veselá K. Opatrný Jr. 《Artificial organs》1997,21(5):359-363
Abstract: Serum amino grams and daily losses of glutamine (Gin) and other amino acids (AAs) into diafiltrate were measured during the first 5 days of continuous venovenous hemodiafiltration (CVVHDF) in 6 ICU patients with acute renal failure (ARF). Four patients had ARF as a part of multiple organ failure (MOF) of septic origin, and 2 patients had isolated ARF because of primary renal disease. During the study, all the patients received defined total parenteral nutrition (TPN). The mean daily AA losses into dialysate were relatively low (0.61 ± 0.1 g N ) and reached 4.5% of the daily AA substitution. Gln represented 32.7 ± 5.9% of the total AA losses (0.19 ± 0.04 g N ). Serum levels of Gin (p = 0.002) and of most other AAs were significantly lower in the patients than in the control subjects (AA analysis in 16 healthy volunteers). Phenylalanine (Phe) was the only AA that was increased significantly (p < 0.01) in the patients. The mean patient serum concentrations of Phe and tyrosine were significantly higher (p < 0.03) than the correspondent concentrations in dialysate, but the lysine concentration was higher in dialysate (p < 0.03). The serum and dialysate concentrations of other AAs did not differ. Gin in serum decreased significantly (p < 0.03) on the second day of CVVHDF but returned to the baseline levels subsequently. Serum concentrations of Phe increased on the second day of CVVHDF (p < 0.05). Serum concentrations of other AAs remained stable during the whole study. We conclude that Gin losses into dialysate during CVVHDF are relatively low, but CVVHDF itself may induce changes in Gin metabolism and distribution that are reflected by a decrease of serum Gin levels at the institution of this treatment. Therefore, the need for Gin supplementation in ICU patients is even greater in the first days of CVVHDF. 相似文献
77.
78.
戴勇 《中国医疗器械信息》2007,13(2):65-66
妇幼保健院运营的模式,服务的对象都有别于综合性医院。通过对设备使用效益的调查、分析,提出妇幼保健院医疗设备的配置,应符合本院的特点。配置应遵循:适用性、特色性、经济性、先进性,不可盲目求新、求全,避免设备使用的低效益。 相似文献
79.
M.M. Bialoskurski MA RN RM C.L. Cox MSc PhD RN & R.D. Wiggins PhD 《Journal of advanced nursing》2002,37(1):62-69
AIM: The aim of this study was to investigate the nature and organization of maternal needs and priorities in a neonatal unit. BACKGROUND: The relationship between maternal needs and priorities appears to be an under studied area in neonatal nursing. METHODS: A quantitative survey was carried out based on 209 mothers with premature infants. Two self-assessment schedules were used: critical care maternal needs inventory (J. Leske, Heart and Lung 15, 27-42) and a ranking scale. The data were analysed with multivariate analysis. FINDINGS: Data analysis revealed clear priorities in maternal needs. In particular the need for accurate infant related information was a priority for 93% of the mothers. Good communication practices with professionals were also valued. The mothers displayed altruistic behaviour, and self-related needs took second place. It is proposed that maternal needs demonstrate a hierarchical organization. CONCLUSION: It is important for nurses to consider the individual needs of the mothers, simply because the satisfaction of these needs is essential for maternal well-being. 相似文献
80.
BiPAP ViSION 在慢性阻塞性肺疾病Ⅱ型呼吸衰竭的应用和护理 总被引:6,自引:2,他引:4
目的 探讨经鼻(面)罩双水平气道内正压通气(BiPAP)ViSION型呼吸机对慢性阻塞性肺疾病(COPD)伴Ⅱ型呼吸衰竭患者疗效及护理特点。方法 应用BiPAP ViSION型呼吸机对21例COPD伴Ⅱ型呼吸衰竭患者采用鼻/面罩连接单向呼气活瓣行双水平气道正压通气,观察其通气前后动脉血气及临床表现变化。结果 通气治疗后19例患者动脉血氧分压(PaO_2)及氧饱和度(SaO_2)明显升高(P<0.01),二氧化碳分压(PaCO_2)显著降低(P<0.05);肺性脑病症状消失,昏迷患者神志转清。2例病情恶化,其中1例改用有创通气后好转,1例拒绝有创通气死亡。结论BiPAP ViSION呼吸机治疗COPD伴Ⅱ型呼吸衰竭的疗效较为肯定,正确的护理对提高其疗效和减少并发症至关重要。 相似文献