全文获取类型
收费全文 | 86145篇 |
免费 | 5987篇 |
国内免费 | 1735篇 |
专业分类
耳鼻咽喉 | 3604篇 |
儿科学 | 1042篇 |
妇产科学 | 1604篇 |
基础医学 | 2832篇 |
口腔科学 | 3164篇 |
临床医学 | 8521篇 |
内科学 | 8543篇 |
皮肤病学 | 730篇 |
神经病学 | 2753篇 |
特种医学 | 2016篇 |
外国民族医学 | 20篇 |
外科学 | 27737篇 |
综合类 | 11991篇 |
现状与发展 | 6篇 |
一般理论 | 2篇 |
预防医学 | 3272篇 |
眼科学 | 4721篇 |
药学 | 3746篇 |
184篇 | |
中国医学 | 970篇 |
肿瘤学 | 6409篇 |
出版年
2024年 | 292篇 |
2023年 | 2210篇 |
2022年 | 3480篇 |
2021年 | 4528篇 |
2020年 | 4479篇 |
2019年 | 3797篇 |
2018年 | 3647篇 |
2017年 | 3244篇 |
2016年 | 3306篇 |
2015年 | 3341篇 |
2014年 | 6555篇 |
2013年 | 6067篇 |
2012年 | 5019篇 |
2011年 | 5226篇 |
2010年 | 4228篇 |
2009年 | 3907篇 |
2008年 | 3769篇 |
2007年 | 3709篇 |
2006年 | 3281篇 |
2005年 | 2861篇 |
2004年 | 2451篇 |
2003年 | 2007篇 |
2002年 | 1562篇 |
2001年 | 1504篇 |
2000年 | 1281篇 |
1999年 | 1177篇 |
1998年 | 966篇 |
1997年 | 908篇 |
1996年 | 683篇 |
1995年 | 569篇 |
1994年 | 506篇 |
1993年 | 410篇 |
1992年 | 335篇 |
1991年 | 350篇 |
1990年 | 246篇 |
1989年 | 232篇 |
1988年 | 231篇 |
1987年 | 239篇 |
1986年 | 180篇 |
1985年 | 204篇 |
1984年 | 195篇 |
1983年 | 119篇 |
1982年 | 131篇 |
1981年 | 108篇 |
1980年 | 90篇 |
1979年 | 56篇 |
1978年 | 48篇 |
1977年 | 41篇 |
1976年 | 28篇 |
1975年 | 29篇 |
排序方式: 共有10000条查询结果,搜索用时 10 毫秒
41.
Robert Bendavid 《Hernia》2002,6(3):141-143
Before surgical intervention in the femoral area, doctors should be mindful of two situations in which surgery is not indicated
and, in fact, may cause harm.
Electronic Publication 相似文献
42.
Hiroyoshi Komai Yasuaki Naito Keiichi Fujiwara Yasuzo Noguchi 《The Japanese Journal of Thoracic and Cardiovascular Surgery》2002,50(2):55-58
OBJECTIVE: Since we developed the procedure in 1996, we have now performed 100 pediatric open heart operations using a lower midline skin incision and a minimal sternotomy approach. METHODS AND RESULTS: To elucidate the benefits of this approach, we analyzed these 100 cases retrospectively. There was no death, and no major complication, caused by this approach, and the resulting scarring in each patient is difficult to be seen under a common undershirt. CONCLUSION: This review shows that the technique of a lower midline skin incision and minimal sternotomy approach is a safe reliable and cosmetically advantageous method for a pediatric cardiac operation. 相似文献
43.
Stephen S. Burkhart MD 《Operative Techniques in Sports Medicine》1997,5(4):204-214
Arthroscopic repair of rotator cuff tears is now possible. By using the biomechanical principles of margin convergenceand the balance of force couples, even large cuff defects can be repaired. Suture anchors are particularly suitable for arthroscopic repairs, and a corkscrew anchor design lends itself to a trans-tendon approach 相似文献
44.
GP SCHWAB AL BLUM E BODNER B DALLEMAGNE K GLASER H KOOP F PACE W RÖSCH JR SIEWERT G WETSCHER 《Journal of gastroenterology and hepatology》1997,12(12):785-789
Gastroesophageal reflux disease (GERD) is the most common disease of the upper gastrointestinal tract. With the introduction of proton pump inhibitors medical treatment of GERD has been significantly improved. However, the development of laparoscopic antireflux surgery resulted in an increasing interest of surgeons in this disease. An interactive meeting was organized in order to develop an agreement between gastoenterologists and surgeons regarding therapeutic decisions and this is the main topic of this paper. 相似文献
45.
J. Benatar-Haserfaty J. Q. Tercero-Lpez A. Coronado-Toural A. Muriel-García 《Ambulatory Surgery》2004,11(1-2):15-18
The objectives of this study were to consider the effectiveness of local anaesthesia (LA) for office-based vitreoretinal (VR) surgery, the requirement to supplement the anaesthetic blockade, the demographic pattern of the sample and the acceptance of LA by patients. This prospective observational audit involved 111 patients that had undergone 128 VR procedures. Assessment data included: patient’s information, details of type of anaesthetic, and pain during surgery. A clinical audit was also carried out with telephone survey to establish the postoperative use of analgesics, the frequency of nausea, emesis, and insomnia. Results suggest that VR surgery can be carried out effectively and safely with LA, in an office-based surgery, provided that experienced surgeons exist. We noted a high degree of patient acceptance, a reasonable level of postoperative pain and a low frequency of nausea and vomits. 相似文献
46.
应用不经胸食管钝性剥离拔脱术治疗26例咽下癌与高位食管癌,效果良好,术后5例发生开发症,其中颈部吻合口痿3例,暂时性咳呛1例,腹部切口局限裂开1例。手术死亡率7.6%(2/26)。介绍了手术方法,对不经胸施术、胃体缝缩、颈部食管胃Gambee氏吻合法应用进行了讨论。 相似文献
47.
E. S. Dellon J. A. Galanko R. K. Medapalli M. W. Russo 《American journal of transplantation》2006,6(9):2183-2190
Because creatinine is heavily weighed in the MELD (model for end-stage liver disease) score, we sought to determine the impact of MELD-based organ allocation on outcomes after transplantation in the pre- and post-MELD eras, focusing on recipients over age 65 on dialysis prior to transplant. A total of 20 196 patients from the UNOS database were analyzed. Comparing the pre-MELD to MELD era, there was a 41% increase in patients on dialysis (p<0.0001), and a 117% increase in combined liver/kidney transplants (p<0.0001). In the pre-MELD era, 1-year patient survival in recipients greater and less than age 65 on dialysis who received liver transplant alone was 56.8% and 76.4%, respectively (p=0.13). In the MELD era these rates were 50.7% and 77.8% (p=0.04). In the pre-MELD era, 1-year patient survival in recipients greater and less than age 65 on dialysis who underwent combined liver/kidney transplantation was 25.0% and 83.2%, respectively (p=0.0002). In the MELD era, these rates were 67.0% and 82.5% (p=0.18). In conclusion, a greater proportion of patients in the MELD era are on dialysis prior to transplant, and more receive combined liver/kidney transplants compared with the pre-MELD era. Candidates over age 65 who are on dialysis at the time of transplant have decreased survival after isolated liver transplantation. 相似文献
48.
G. Kostopanagiotou A. Pandazi I. Andreadou A. Doufas I. Chondroudaki T. Kotsis D. Rizos C. Costopanagiotou V. Smyrniotis 《European journal of vascular and endovascular surgery》2005,30(6):648-653
OBJECTIVE: We investigated the dose-related effect of dopexamine and dopamine on free radical production and lipid peroxidation estimated by MDA measurements in an ischaemia-reperfusion model of supraceliac aortic repair. DESIGN: Prospective, randomized, blinded experimental study. MATERIALS: Twenty-five healthy pigs. METHODS: All experiments were performed under general endotracheal anaesthesia. Supraceliac aortic cross clamping was performed in all pigs. The pigs were randomly assigned into five groups (n=5 in each group) and received a continuous intravenous infusion of normal saline (CTL), dopamine 2 microg kg(-1)min(-1) (dopa 2), dopamine 8 microg kg(-1)min(-1) (dopa 8), dopexamine 2 microg kg(-1)min(-1) (dopex 2), dopexamine 8 microg kg(-1)min(-1) (dopex 8). Cardiac output, mean arterial pressure, arterial blood gas analysis and blood sampling for plasma MDA measurements (to reveal lipid peroxidation) were recorded after induction of anaesthesia (baseline), 60 and 120 min after cross-clamping of aorta (ischaemia phase), and 60 and 120 min after restoration of flow (reperfusion phase). RESULTS: Dopexamine and dopamine at 8 microgkg(-1)min(-1) reduced MDA at 60 and 120 min after reperfusion. CONCLUSION: Dopexamine seems superior to dopamine in reducing oxygen free radicals and subsequent lipid peroxidation during reperfusion after supraceliac aortic cross clamping in pigs. 相似文献
49.
Summary A ring-shaped electrode was developed and used in 20 patients to record evoked electromyographic responses directly from the extraocular muscles during skull base surgery. Intra-operative monitoring with this electrode helps the surgeon to localize the nerves that innervate the extraocular muscles precisely and to refrain from disturbing important neural structures during operations. Such monitoring also provides some insight into the pathophysiology of the dysfunction of these nerves resulting from skull base lesions. 相似文献
50.
Day-only admissions for surgery are strongly encouraged, in an effort to keep costs down. Varicose vein surgery has been considered too major for day-only management despite the fact that there have been studies from overseas showing that it can be done with a morbidity comparable to inpatient surgery. The morbidity of day-only surgery for varicose veins (both long and short saphenous procedures) was assessed and compared with the results of inpatient surgery. Patients were also asked whether they were satisfied with the surgery being done this way. There were 165 consecutive patients available for study, 64 day-only and 101 inpatient. All patients attending Shellharbour Hospital, Shellharbour, had surgery done as day-only (as it was a morning list and allowed adequate time for recovery). Patients attending Bulli Hospital, Bulli, had surgery done as an inpatient (afternoon list). All surgery was performed by one surgeon. There was no difference (Chi-squared) in the age distribution (mean 48 years for day-only, 51 years for inpatient) or sex proportion in either group (Chi-squared test of proportions with continuity correction). Assessment of the results was done by review of the surgeon's notes, as well as telephone interviews for day-only subjects. The complication rate in both groups was similar. Wound problems represented the main complication with an incidence of 10.5% in each group. There was one deep venous thrombosis (DVT) in each group (diagnosed by duplex scan). Response to the telephone interview suggested that most patients were happy to have the surgery done as a day-only procedure. Sixty-nine per cent responded that they would have it done this way again and 76% were satisfied with the result of the surgery. This study confirms the results of overseas studies, in that varicose vein surgery can be performed as day-only procedures with a complication rate similar to inpatient procedures and with a high degree of patient satisfaction. It is suggested that this should be used as the method of choice for the majority of patients requiring varicose vein surgery. 相似文献