全文获取类型
收费全文 | 1289篇 |
免费 | 186篇 |
国内免费 | 18篇 |
专业分类
耳鼻咽喉 | 20篇 |
儿科学 | 51篇 |
妇产科学 | 20篇 |
基础医学 | 86篇 |
口腔科学 | 38篇 |
临床医学 | 209篇 |
内科学 | 282篇 |
皮肤病学 | 104篇 |
神经病学 | 42篇 |
特种医学 | 132篇 |
外科学 | 201篇 |
综合类 | 94篇 |
现状与发展 | 30篇 |
预防医学 | 52篇 |
眼科学 | 15篇 |
药学 | 43篇 |
中国医学 | 4篇 |
肿瘤学 | 70篇 |
出版年
2024年 | 18篇 |
2023年 | 179篇 |
2022年 | 12篇 |
2021年 | 16篇 |
2020年 | 55篇 |
2019年 | 21篇 |
2018年 | 51篇 |
2017年 | 45篇 |
2016年 | 39篇 |
2015年 | 55篇 |
2014年 | 83篇 |
2013年 | 60篇 |
2012年 | 26篇 |
2011年 | 29篇 |
2010年 | 74篇 |
2009年 | 88篇 |
2008年 | 30篇 |
2007年 | 55篇 |
2006年 | 21篇 |
2005年 | 23篇 |
2004年 | 12篇 |
2003年 | 15篇 |
2002年 | 18篇 |
2001年 | 16篇 |
2000年 | 18篇 |
1999年 | 30篇 |
1998年 | 36篇 |
1997年 | 49篇 |
1996年 | 40篇 |
1995年 | 35篇 |
1994年 | 29篇 |
1993年 | 34篇 |
1992年 | 7篇 |
1991年 | 7篇 |
1990年 | 10篇 |
1989年 | 22篇 |
1988年 | 22篇 |
1987年 | 18篇 |
1986年 | 5篇 |
1985年 | 11篇 |
1984年 | 4篇 |
1983年 | 5篇 |
1982年 | 9篇 |
1981年 | 10篇 |
1980年 | 12篇 |
1978年 | 5篇 |
1977年 | 3篇 |
1976年 | 13篇 |
1975年 | 10篇 |
1974年 | 3篇 |
排序方式: 共有1493条查询结果,搜索用时 15 毫秒
91.
92.
ANTHONY G CATTO-SMITH TERENCE M NOLAN CAROLYN MM COFFEY 《Journal of gastroenterology and hepatology》1998,13(9):955-960
Treatments designed to relieve paradoxical contraction of the anal sphincters during defecation (anismus) have had limited success in children with encopresis. This has raised doubts as to the clinical relevance of this diagnosis in childhood as anorectal dysfunction. Our aim was to determine whether, in patients who had treatment-resistant encopresis, the presence of electromyographic anismus was associated with increased faecal retention. Sixty-eight children with soiling (mean age 8.7 ± 2.06 years) were assessed by clinical examination, abdominal radiography and then with anorectal manometry. Patients with electromyographic anismus (n= 32; 47%) had significantly increased radiographic rectal faecal retention and were significantly less likely to be able to defecate water-filled balloons. There were no significant differences in response to prior therapy, history of primary encopresis, behavioural adjustment or in sociodemographic data. Our results suggest that electromyographic anismus is associated with obstructed defecation and faecal retention. 相似文献
93.
MM Harjai DC Agarwal P Dave SS Jog P Arora SM VSM 《Medical Journal Armed Forces India》2005,61(2):143-147
Background
The sudden increase in incidence and magnitude of mine blast injuries prompted us to highlight the problem and its management.Methods
The cases of mine blast injuries occurring during mining and demining in a particular geographical area were analysed. Total 27 cases of mine blast injuries occurred during mining or demining operations in a period of 13 months.Results
Various body regions were involved in the mine blast injuries but the main brunt was borne by feet and legs followed by multiple body regions due to splinters. 14 patients underwent below knee (BK) amputation while 4 patients required through knee (TK) amputations. The effect of blast was so severe that most of the cases required 2 to 5 times wound debridements. The initial aggressive debridement / open stump amputation saved the limb and life of all patients.Conclusion
A mine blast causes extensive injuries and psychological trauma. Management is needed urgently, surgery is difficult, and amputation is often inevitable. Maximum lives and limbs can be saved with aggressive debridement, repeated inspections and dressings under anaesthesia and definitive closure at optimum time.Key Words: Amputation, Antipersonnel mine, Crush syndrome, Debridements, Mine blast injury, Secondary missiles, Shrapenels 相似文献94.
An in vitro is described that attempts to detect patients with a potential for adverse systemic reactions to contrast material. This test involves measuring the rate of conversion of prekallikrein to kallikrein under certain standard conditions. In a preliminary retrospective study, the test could be used to identify such patients with a sensitivity of 88%, a specificity of 82%, and a predictive value of 79%. 相似文献
95.
Effects of Vitamin C and E on PCB (Aroclor 1254) induced oxidative stress, androgen binding protein and lactate in rat Sertoli cells 总被引:6,自引:0,他引:6
Senthil kumar J Banudevi S Sharmila M Murugesan P Srinivasan N Balasubramanian K Aruldhas MM Arunakaran J 《Reproductive toxicology (Elmsford, N.Y.)》2004,19(2):201-208
The effect of Aroclor 1254 and the ameliorative effect of Vitamin C and E on Sertoli cell function were studied in adult male rats. The rats were administered Aroclor 1254 at a dose of 2 mg/kg bw/day intraperitoneally for 30 days. One group of rats received Vitamin C (100 mg/kg bw/day) while the other group received Vitamin E (50 mg/kg bw/day) orally simultaneously with Aroclor 1254 for 30 days. Necropsy was performed at 24 h after the last injection. Sertoli cells were isolated for the estimation of enzymatic antioxidants superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), glutathione reductase (GST), and gamma-glutamyl transpeptidase (gamma-GT). Lipid peroxidation (LPO), hydrogen peroxide and hydroxyl radical were estimated. Sertoli cellular androgen binding protein (ABP) and lactate were also quantified. Whereas body weight, testis weight, relative weight of testis, ABP, lactate and specific activities of SOD, CAT, GPx, GR, GST, gamma-GT were all decreased, the levels of hydrogen peroxide, hydroxyl radical and LPO were significantly increased in the Sertoli cells of Aroclor 1254 treated rats. Simultaneous administration of Vitamin C or E restored these parameters to a normal range. Thus, the present study suggests that Aroclor 1254 exposure induces oxidative stress in rat Sertoli cells and furthermore that simultaneous administration of Vitamin C or E ameliorated these effects. 相似文献
96.
Oliver W. Hayes DO MHSA Earl J. Reisdorff MD Gregory L. Walker MD Dale J. Carlson MM Bruce Reinoehl MD 《Academic emergency medicine》2002,9(11):1334-1337
Emergency medicine residency programs are required by the Accreditation Council for Graduate Medical Education (ACGME) to formally evaluate each resident with oral and written examinations. The Michigan State University Emergency Medicine Residency Program in Lansing conducts monthly standardized oral examinations (SOEs) as part of each resident's evaluation. Recently, the ACGME has advanced six areas, termed "general competencies," that should be acquired during graduate medical education. According to the ACGME, these competencies should be included in the educational process of all residency programs. In promulgating these competencies, the ACGME did not provide examples of core content, strategies for implementation, or methods of evaluation; rather, individual residency programs are required to develop their own methods. The authors describe a modification of an existing SOE strategy that assesses residents' knowledge, skills, experiences, and attitudes as reflected in the general competencies. 相似文献
97.
98.
99.
V Kannan CE Deopujari BK Misra PG Shetty MM Shroff AM Pendse 《Journal of Medical Imaging and Radiation Oncology》1999,43(3):339-341
Gamma knife was installed at the PD Hinduja National Hospital and Medical Research Centre, Mumbai, India, in January 1997. In the first year of gamma-knife radiosurgery to January 1998, we treated 110 patients, of whom six had medically refractory trigeminal neuralgia. Seven treatments were administered to this group of six patients (one had bilateral neuralgia). This report evaluates the effectiveness of radiosurgery treatment in these patients. The median age of the patients was 56 years and there were five males and one female. Following Leksell stereotactic frame fixation, a magnetic resonance imaging scan was done in all. The Leksell gamma plan was used for planning. A radiosurgery dose of 70–80 Gy was delivered to the trigeminal root entry zone, 2–4 mm anterior to the junction of the pons and trigeminal nerve with a single 4 mm collimator helmet. Complete pain relief was achieved in four patients. Two had partial relief. No patient developed any radiosurgery related morbidity during the follow-up period of 5–16 months. Radiosurgery seems to be an effective approach for medically or surgically refractory trigeminal neuralgia. 相似文献
100.