全文获取类型
收费全文 | 2470142篇 |
免费 | 176192篇 |
国内免费 | 5836篇 |
专业分类
耳鼻咽喉 | 33498篇 |
儿科学 | 75449篇 |
妇产科学 | 65839篇 |
基础医学 | 352039篇 |
口腔科学 | 72586篇 |
临床医学 | 221797篇 |
内科学 | 479379篇 |
皮肤病学 | 55522篇 |
神经病学 | 191729篇 |
特种医学 | 95153篇 |
外国民族医学 | 319篇 |
外科学 | 377155篇 |
综合类 | 53932篇 |
现状与发展 | 9篇 |
一般理论 | 801篇 |
预防医学 | 178134篇 |
眼科学 | 59361篇 |
药学 | 186111篇 |
10篇 | |
中国医学 | 7262篇 |
肿瘤学 | 146085篇 |
出版年
2021年 | 21009篇 |
2019年 | 20658篇 |
2018年 | 29431篇 |
2017年 | 22429篇 |
2016年 | 25442篇 |
2015年 | 29848篇 |
2014年 | 40160篇 |
2013年 | 57303篇 |
2012年 | 79990篇 |
2011年 | 83259篇 |
2010年 | 49371篇 |
2009年 | 45778篇 |
2008年 | 76292篇 |
2007年 | 80275篇 |
2006年 | 80475篇 |
2005年 | 76900篇 |
2004年 | 73787篇 |
2003年 | 69744篇 |
2002年 | 67036篇 |
2001年 | 126798篇 |
2000年 | 129828篇 |
1999年 | 107717篇 |
1998年 | 28097篇 |
1997年 | 24469篇 |
1996年 | 24522篇 |
1995年 | 23431篇 |
1994年 | 21408篇 |
1993年 | 19786篇 |
1992年 | 81496篇 |
1991年 | 78512篇 |
1990年 | 75580篇 |
1989年 | 72954篇 |
1988年 | 66433篇 |
1987年 | 64746篇 |
1986年 | 60991篇 |
1985年 | 58003篇 |
1984年 | 42319篇 |
1983年 | 36067篇 |
1982年 | 19929篇 |
1979年 | 37544篇 |
1978年 | 25815篇 |
1977年 | 22029篇 |
1976年 | 20149篇 |
1975年 | 21483篇 |
1974年 | 26032篇 |
1973年 | 24924篇 |
1972年 | 23300篇 |
1971年 | 21688篇 |
1970年 | 20363篇 |
1969年 | 19044篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
S. Spinty H. Rogozinski G. T. Lealman J. E. Wraith 《Journal of inherited metabolic disease》2003,25(8):697-698
Summary: A female patient with isovaleric acidaemia had a successful outcome from pregnancy. 相似文献
62.
OBJECTIVE: To explore the presence and grade of denervation in three mimic muscles in facial nerve palsy. METHODS: The frontalis, orbicularis oculi (OO), and mentalis muscles were explored in 54 patients with Bell's palsy, after 30 days from the beginning of symptoms. Concentric needle electromyography, including fibrillation detection, was performed in the three muscles on the affected side. Compound muscle action potentials (CMAP) were recorded on both sides and a CMAP ratio was calculated from each muscle. The House-Brackman scale was used to assess the initial clinical evaluation and the follow-up until recovery. RESULTS: Fibrillation was recorded in 32 patients on the 30th day after the onset and was present in 100% of mentalis and in 90% of frontalis, but in only 34% of OO, a statistically significant difference. The grade of fibrillation in OO was also statistically lower from those in the other two muscles. The 32 patients were grouped according to the presence (A) or not (B) of fibrillation in OO. In group A, CMAP ratios (affected/normal side) did not differ significantly among the three muscles. However, in group B they were significantly greater in OO and frontalis than in mentalis. In between-group comparison, group B muscles had significantly higher CMAP ratios, lower degree of fibrillation, and better functional recovery. CONCLUSION: In facial palsy, the presence and grade of fibrillation in OO are lower than in frontalis and mentalis muscles and prognosis is more favorable for the non-fibrillating OO group of patients. 相似文献
63.
A 27-year-old man was admitted with high fever and shivers eleven days after returning from vacation in Indonesia. Physical examination, laboratory values, abdominal ultrasound, and chest x-ray were not conclusive. All blood cultures yielded growth of Salmonella enterica serovar Typhi, and typhoid fever was diagnosed. Subsequently, the patient developed septic shock and pulmonary edema.In this case report epidemiological, clinical, and therapeutic aspects of typhoid fever are discussed with special emphasis on criteria for severe typhoid fever, which is treated with additional glucocorticoids. 相似文献
64.
65.
66.
67.
AIM: The innovations for disease management need to be thoroughly evaluated so that their benefits and potential downsides can be compared with the already existing approaches. Endovascular laser (EVL) treatment for varicose veins offers today several advantages over surgical standard stripping. The Italian Endovenous-laser Working Group (IEWG) is a homogeneous group of surgeons and phlebologists who have been using EVL since 1999 and has undertaken to examine EVL in a multicenter study starting from a well defined rationale, with the benefit of a single protocol to use. METHODS: In a cooperative, multicenter, clinical study, 1076 limbs in 1050 patients, mean age of 54.5 years, 241 males and 809 females affected by chronic venous insufficiency (CVI) were considered eligible for surgery and stratified by CEAP classification in a four-year period (January 1999 December 2003). Inclusion criteria were insufficiency of the great and/or small saphenous vein at various levels, beyond those accessory saphenous trunks with incompetence in the saphenofemoral junction. In all cases truncular reflux apparead up on duplex scan examination, with or without associated varicosities. All the patients underwent a surgery on the basis of the clinical assessment. All the centres involved performed treatment in conformity with the Food and Drug Administration (FDA) validated procedure, using an endo-laser venous system kit with a 810-980 nm diode. Duplex scan was performed in all patients after 36 months with very few lost to follow-up cases. RESULTS: In the immediate postoperative period the results have been impressive, with a very effective closure of incompetent great saphenous vein and the other treated varicose veins (the early occlusion rate has been 99%). Major complications have not been detected: in particular, no deep venous thrombosis (DVT) evaluated duplex ultrasound. The patients' acceptability and satisfaction regarding the procedure, have been measured by means of a questionnaire on the quality of life, and the result was 96.7%. After 36 months, the total occusion rate of saphenous trunks has been 97%. CONCLUSIONS: The first important Italian experience with EVL based on preoperative, perioperative and postoperative duplex control and which is also based on the patients' satisfaction at mid/long-term has indicated some advantages over the standard treatment with the stripping method. In terms of reduced postoperative pain, shorter sick leave, a faster resumption of the normal activities, and, in particular, the total absence of DVT, we can conclude that EVL is a good solution for all patients with anatomic and hemodinamic patterns for saphenous vein surgery. 相似文献
68.
Will Kaufman Augustine S Chavez Betty Skipper Arthur Kaufman 《International journal for equity in health》2006,5(1):6-5
Background
A public hospital in New Mexico required collection of 50% of estimated costs prior to elective surgeries for self-pay patients. This study assesses the impact of this policy on access to elective surgical procedures. 相似文献69.
70.
D J Adam S Raptis R A Fitridge 《European journal of vascular and endovascular surgery》2006,31(2):151-156
BACKGROUND: This study examines trends in the presentation and surgical management of acute diabetic foot problems in a single institution. METHOD: Prospective audit of all diabetic patients who had a primary procedure for critical lower limb ischaemia (CLI) and/or foot sepsis between 1st January 1990 and 31st December 2002. Primary and secondary intervention, mortality and limb salvage rate within 6 weeks of the index procedure were recorded. RESULTS: There were 661 patients (417 men and 244 women of median age 69, range 31-99, years) with 799 affected limbs. CLI alone was present in 625 (78%) limbs, combined CLI and foot sepsis in 53 (7%) and foot sepsis alone in 121 (15%). The primary intervention was minor amputation in 323 (40%) limbs, revascularisation in 288 (36%), major amputation in 185 (23%) and sympathectomy in three limbs. Within 6 weeks, 125 (16%) limbs required secondary intervention, the peri-procedural mortality rate was 38 of 924 (4%), and the limb salvage rates for patients with CLI, combined CLI and sepsis and sepsis alone were 66, 66 and 80%, respectively. There was a significant decline in the proportion of patients presenting with CLI alone and a significant increase in the proportion presenting with combined CLI and sepsis and sepsis alone. In patients with CLI alone, there was a significant increase in the primary major amputation rate and a significant decline in the minor amputation rate with no significant change in the revascularisation rate. CONCLUSION: There has been a progressive decline in the proportion of patients presenting with CLI alone and a greater proportion of patients presenting with an element of foot sepsis. In patients with CLI alone, the primary major amputation rate has increased at the expense of a decline in minor amputation rate. 相似文献