全文获取类型
收费全文 | 24703篇 |
免费 | 2054篇 |
国内免费 | 34篇 |
专业分类
耳鼻咽喉 | 403篇 |
儿科学 | 722篇 |
妇产科学 | 728篇 |
基础医学 | 3207篇 |
口腔科学 | 625篇 |
临床医学 | 2997篇 |
内科学 | 4175篇 |
皮肤病学 | 195篇 |
神经病学 | 1811篇 |
特种医学 | 875篇 |
外科学 | 3718篇 |
综合类 | 567篇 |
一般理论 | 13篇 |
预防医学 | 2912篇 |
眼科学 | 442篇 |
药学 | 1728篇 |
1篇 | |
中国医学 | 45篇 |
肿瘤学 | 1627篇 |
出版年
2021年 | 345篇 |
2020年 | 220篇 |
2019年 | 362篇 |
2018年 | 409篇 |
2017年 | 301篇 |
2016年 | 294篇 |
2015年 | 358篇 |
2014年 | 488篇 |
2013年 | 747篇 |
2012年 | 1109篇 |
2011年 | 1098篇 |
2010年 | 610篇 |
2009年 | 534篇 |
2008年 | 1017篇 |
2007年 | 1100篇 |
2006年 | 973篇 |
2005年 | 960篇 |
2004年 | 995篇 |
2003年 | 907篇 |
2002年 | 862篇 |
2001年 | 871篇 |
2000年 | 872篇 |
1999年 | 721篇 |
1998年 | 366篇 |
1997年 | 350篇 |
1996年 | 328篇 |
1995年 | 312篇 |
1994年 | 221篇 |
1993年 | 196篇 |
1992年 | 603篇 |
1991年 | 523篇 |
1990年 | 508篇 |
1989年 | 496篇 |
1988年 | 477篇 |
1987年 | 431篇 |
1986年 | 464篇 |
1985年 | 452篇 |
1984年 | 360篇 |
1983年 | 300篇 |
1982年 | 205篇 |
1981年 | 193篇 |
1980年 | 212篇 |
1979年 | 346篇 |
1978年 | 238篇 |
1977年 | 223篇 |
1975年 | 186篇 |
1974年 | 227篇 |
1973年 | 204篇 |
1972年 | 199篇 |
1969年 | 198篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
Experience with intraaortic balloon counterpulsation 总被引:6,自引:0,他引:6
P M Sanfelippo N H Baker H G Ewy P J Moore J W Thomas G J Brahos R F McVicker 《The Annals of thoracic surgery》1986,41(1):36-41
An eleven-year experience with intraaortic balloon pumping (IABP) or counterpulsation in 637 patients was analyzed with respect to early and late results. Intraaortic balloon pumping was employed for left ventricular pump failure, for coronary insufficiency, and in association with cardiac operations. Late results were analyzed by follow-up of 283 (93%) of the 304 patients leaving the hospital, and were studied with respect to duration of survival, activity status, occupational status, presence of cardiac symptoms, use of cardiac medications, and presence of lower extremity claudication. Early results were analyzed for hospital survival (304/637 [48%]). Patient complications of IABP included wound infection (1/637 or 0.2%), vascular complications (66/637 or 10.4%), and balloon failure (8/637 or 1.3%). No deaths were attributable to complications of IABP. Survival did not correlate with the duration of IABP. Survival was improved in patients who had revascularization in association with IABP. 相似文献
32.
33.
D. M. Niall P. G. Murphy E. E. Fogarty F. E. Dowling D. P. Moore 《Irish journal of medical science》1997,166(2):98-101
Eleven children with Pseudomonas aeruginosa infection complicating foot puncture wounds were reviewed. Delay in presentation
(mean 2 days) and diagnosis (mean 9 days) due to a paucity of clinical signs of deep infection was characteristic of this
condition. Septic arthritis (5 patients) and osteomyelitis (3 patients) were frequent complications. Treatment involved multiple
surgical debridements and prolonged intravenous antibiotic therapy. The clinical outcome was good although long-term radiographic
changes were common. 相似文献
34.
35.
In his autobiography, Dr. Wilder Penfield relates the medical history of his sister, Mrs. Ruth Inglis, who developed a right frontal oligodendroglioma. Penfield performed the initial craniotomy on her, and after her death, reported the case in a paper on frontal lobe function in humans. Although Penfield has provided more than adequate information on certain aspects of his sister's illness, little has been published concerning her subsequent operation performed by Dr. Harvey Cushing at the Peter Bent Brigham Hospital. We feel this case is significant for several reasons. First, it sheds some light on Penfield's personal relationship with Cushing and his sister; it also shows the deep interest that Dr. Cushing took in his patients. Second, this case nicely illustrates how Cushing used his postoperative drawings to make his operative notes more precise. Finally, we see a sample of the work done by Dr. Louise Eisenhardt as pathologist at the Peter Bent Brigham Hospital. 相似文献
36.
Leah L. Albers Deborah Anderson Leslie Cragin Susan Moore Daniels Christine Hunter Kay D. Sedler Dusty Teaf 《Journal of Midwifery & Women's Health》1996,41(4):269-276
We conducted an observational cohort study in three nurse-midwifery services to identify patient characteristics and clinical care measures related to perineal trauma at birth. Data were collected on all women who began care with a nurse-midwife in labor, using an adaptation of the Nurse-Midwifery Clinical Data Set (n = 3,049). Study variables included demographics, perineal management techniques and position for birth, and other intrapartum care and events. Univariate and multivariate analyses showed that episiotomy was strongly related to fetal bradycardia, prolonged second stage, ethnic status, and maternal education level. Warm compresses and flexion/counterpressure to slow delivery were protective. Spontaneous lacerations were influenced by these factors as well. The lateral position for birth was protective, and use of oils or lubricants and the lithotomy position increased lacerations. Multisite studies in nurse-midwifery practices may provide an ideal means of determining effective care measures in healthy populations. 相似文献
37.
38.
The effect of currently available contact lens disinfection systems on Acanthamoeba castellanii and Acanthamoeba polyphaga 总被引:6,自引:0,他引:6
R E Silvany J M Dougherty J P McCulley T S Wood R W Bowman M B Moore 《Ophthalmology》1990,97(3):286-290
Contact lens disinfection systems were evaluated for their effectiveness in killing Acanthamoeba castellanii and Acanthamoeba polyphaga trophozoites and cysts. Amoebae were inoculated into commercially available contact lens cleaning and soaking solutions. At intervals varying from 30 minutes to 24 hours, solutions were filtered. The filters were removed and cultured for Acanthamoeba organisms. Striking differences were observed in the abilities of the different disinfecting solutions to kill the organisms. Solutions containing chlorhexidine were effective at very short exposure times. Solutions containing benzalkonium chloride required slightly longer exposure times but were faster than solutions containing only thimerosal. Solutions containing sorbate, polyaminopropyl biguanide, or polyquaternium-1 were not effective at killing Acanthamoeba organisms in the time allotted for the experiment. Solutions containing hydrogen peroxide were quite effective if the agent was not prematurely catalyzed. A. polyphaga generally required longer exposure to disinfectants than did A. castellanii for complete inhibition to occur. 相似文献
39.
Vascularized fibular grafts in the treatment of congenital pseudarthrosis of the tibia 总被引:3,自引:0,他引:3
A J Weiland A P Weiss J R Moore V T Tolo 《The Journal of bone and joint surgery. American volume》1990,72(5):654-662
Free vascularized fibular bone grafts were used in nineteen children, seen consecutively, who had congenital pseudarthrosis of the tibia. The average age was 5.1 years (range, 1.4 to 11.4 years). Sixteen of the patients had been treated with electrical stimulation for at least one year, and the tibia had not united. All but four patients had had at least one previous operative procedure. At an average follow-up of 6.3 years (range, 2.0 to 11.0 years), eighteen (95 per cent) of the nineteen pseudarthroses had healed. The leg-length discrepancy averaged 1.6 centimeters (range, 0 to 4.0 centimeters), but ten tibiae had residual or progressive valgus or anteroposterior malalignment despite bracing. There was minimum morbidity at the donor site. 相似文献
40.