全文获取类型
收费全文 | 2465篇 |
免费 | 103篇 |
国内免费 | 11篇 |
专业分类
耳鼻咽喉 | 25篇 |
儿科学 | 180篇 |
妇产科学 | 133篇 |
基础医学 | 185篇 |
口腔科学 | 65篇 |
临床医学 | 227篇 |
内科学 | 537篇 |
皮肤病学 | 49篇 |
神经病学 | 136篇 |
特种医学 | 133篇 |
外科学 | 517篇 |
综合类 | 38篇 |
预防医学 | 53篇 |
眼科学 | 45篇 |
药学 | 111篇 |
中国医学 | 3篇 |
肿瘤学 | 142篇 |
出版年
2023年 | 19篇 |
2022年 | 33篇 |
2021年 | 54篇 |
2020年 | 23篇 |
2019年 | 35篇 |
2018年 | 51篇 |
2017年 | 45篇 |
2016年 | 66篇 |
2015年 | 74篇 |
2014年 | 88篇 |
2013年 | 120篇 |
2012年 | 168篇 |
2011年 | 188篇 |
2010年 | 108篇 |
2009年 | 73篇 |
2008年 | 185篇 |
2007年 | 192篇 |
2006年 | 177篇 |
2005年 | 172篇 |
2004年 | 166篇 |
2003年 | 128篇 |
2002年 | 91篇 |
2001年 | 73篇 |
2000年 | 47篇 |
1999年 | 35篇 |
1998年 | 14篇 |
1997年 | 10篇 |
1996年 | 11篇 |
1995年 | 6篇 |
1994年 | 11篇 |
1992年 | 8篇 |
1991年 | 11篇 |
1990年 | 11篇 |
1989年 | 5篇 |
1988年 | 4篇 |
1987年 | 11篇 |
1986年 | 5篇 |
1985年 | 10篇 |
1984年 | 2篇 |
1983年 | 8篇 |
1981年 | 3篇 |
1980年 | 2篇 |
1979年 | 10篇 |
1978年 | 4篇 |
1977年 | 3篇 |
1976年 | 2篇 |
1975年 | 3篇 |
1971年 | 3篇 |
1967年 | 2篇 |
1935年 | 1篇 |
排序方式: 共有2579条查询结果,搜索用时 15 毫秒
71.
72.
Mehmet Odabasi Cengiz Eris Mehmet Kamil Yildiz Hasan Abuoglu Sami Akbulut Abdullah Saglam 《International surgery》2013,98(3):277-281
Hepatic artery aneurysms are responsible for 12% to 20% of all visceral arterial aneurysms. Because most patients are asymptomatic, this disease is generally diagnosed incidentally during radiologic examination. Aneurysm rupture develops in 14% to 80% of cases, depending on the aneurysmatic segment''s diameter and location, as well as other etiologic factors. Mortality rates associated with rupture range between 20% and 70%. Thus, early diagnosis and timely initiation of medical interventions are critical to improve survival rates. Here, we present a male patient, age 69 years, with a hepatic artery aneurysm that was detected incidentally. The 3-cm aneurysm was detected on contrast-enhanced computed tomography and extended from the common hepatic artery to the hepatic trifurcation. A laparotomy was performed using a right subcostal incision. After dissection of the hepatoduodenal ligament, the common, right, and left hepatic arteries, as well as the gastroduodenal artery, were suspended separately. Then, the aneurysmatic hepatic artery segment was resected, and the gastroduodenal artery stump was ligated. An end-to-end anastomosis was formed between the left and common hepatic arteries, followed by an end-to-end anastomosis formed between the right hepatic artery and splenic artery using a splenic artery transposition graft. Postoperative follow-up examinations showed that both hepatic arterial circulations were good, and no splenic infraction had developed. 相似文献
73.
Suleyman Celebi Durdane Aksoy Betul Cevik Abdullah Yildiz Semiha Kurt Ali Ihsan Dokucu 《Journal of pediatric surgery》2013
Background
A prospective study was performed to evaluate the effect of inguinal hernia repairs on the genitofemoral nerve (GFN), and to compare postoperative electrophysiologic changes in the GFN of patients who had undergone either open or laparoscopic surgery.Methods
Seventy patients with a mean age of 6.48 ± 3.49 were enrolled in the study. Either open or laparoscopic techniques were used to operate on the patients' inguinal hernias. In all cases, bilateral GFN motor responses were investigated electrophysiologically using surface electrodes on three occasions: preoperatively, in the first month, and third month postoperatively. t-Tests were used to compare changes in the GFN.Results
Preoperative mean latency of the GFN in all groups was found to be significantly prolonged on the hernia side, compared with the non-hernia side (P = 0.01). Although no difference was observed in the latency levels of the GFN on the operated side at the preoperative and early postoperative stages, GFN latency levels decreased significantly in the late postoperative period in the laparoscopic group (P < 0.05). In the late postoperative period, amplitudes of GFN motor responses were significantly higher in the laparoscopic group than the open repair group (0.91 ± 0.11 mV and 0.57 ± 0.053 mV, respectively; P < 0.05).Conclusion
Preoperative prolonged latency of GFN on the hernia side is likely to occur due to the pressure on the nerve caused by the hernia mass. By surgically removing the hernia mass, this buildup of pressure is prevented, decreasing the latency of the GFN. The significantly higher motor response amplitudes and decreased latency in the late postoperative stage for the laparoscopic group may be due to the fact that this technique is less invasive. 相似文献74.
Kilickesmez KO Abaci O Kocas C Yildiz A Kaya A Okcun B Kucukoglu S 《Heart and vessels》2012,27(4):391-397
Predictors of aortic dilatation are not well described in patients with bicuspid aortic valves (BAV). This study sought to examine the relationship between proximal aortic dilatation and matrix metalloproteinase-9 (MMP-9) and alpha 1-antitrypsin (α1AT) levels in patients with BAV. All patients underwent echocardiography using a standard protocol, and aortic measurements were taken in end-diastole. We studied 82 patients with BAV and categorized them into two groups according to aortic dimensions corrected for body surface area and age. The plasma level of α1AT was routinely determined using a BN ProSpec analyzer (Siemens Healthcare Diagnostics, Marburg, Germany), and that of MMP-9 were determined by ELISA (RayBiotech Inc. Norcross, GA, USA). Statistical analysis was performed using the Statistical Package for Social Sciences (SPSS; SPSS Inc., Chicago, IL, USA) software for Windows version 12. This study included patients with BAV with no or mild valvular impairment. There were no significant differences between groups in terms of gender, body surface area, associated hypertension, diabetes mellitus, hyperlipidemia, or smoking. The mean ascending aortic diameter was 4.38?±?0.5?mm in group 1 and 3.34?±?0.35?mm in group 2 (p?0.001). Plasma concentration of α1AT in patients with ascending aortic dilatation was significantly lower than that in the non-dilated group (1.32?±?0.27 and 1.49?±?0.25?g/l, respectively; p?=?0.005). However, no significant difference was found in the MMP-9 level between the two groups (336.49?±?233.11 and 336.39?±?268.072?pg/ml, respectively; p?=?0.96). We observed a significantly negative correlation between ascending aortic diameter and α1AT level (r?=?-0.300, p?=?0.006) and a positive correlation between ascending aortic diameter and age (r?=?0.413, p?0.001). No significant correlation was found between plasma MMP-9 concentration and ascending aortic diameter (r?=?-0.008, p?=?0.94). A multiple linear regression analysis was performed, including age, α1AT level, MMP-9 level, and left ventricular diastolic diameter. In this analysis, α1AT level and age were the independent predictors of aortic dilatation (p?=?0.03 and p?=?0.02, respectively). 相似文献
75.
76.
77.
Askin Esen Hasturk Kemal Ilik Ilker Coven Ozgur Ozdemir 《Neurologia medico-chirurgica》2013,53(12):887-889
Posttraumatic spondyloptosis develops as a result of complete subluxation of the vertebral bodies and causes complete transection of the spinal cord. Severe trauma-related spondyloptosis of the upper-mid thoracic region is a rare form of spinal trauma. Traumatic midthoracic spondyloptosis is quite rare, and radiology plays an important role in the diagnosis and treatment of this condition. Surgical reconstruction and stabilization are required for early mobilization and rehabilitation of patients with this injury. Here, we report the clinical features, radiographic findings, and management of an unusual case of traumatic midthoracic spondyloptosis that showed complete spinal cord transection and was operated. 相似文献
78.
Ilker Sucullu Huseyin Sinan Ali Ilker Filiz Senol Yildiz Ergun Yucel Yavuz Kurt 《Journal of investigative surgery》2013,26(4):195-200
The aim of this study is to investigate the healing effect of hyperbaric oxygen (HBO) on colonic anastomoses in the presence of experimentally induced peritonitis. Thirty-two rats were allocated randomly into short-term anastomosis (STA), short-term anastomosis + HBO treatment (STA+HBO), long-term anastomosis (LTA), and long-term anastomosis + HBO (LTA+HBO) treatment groups. The STA and LTA groups were administered fluid resuscitation and antibiotics for 3 and 7 days, respectively, whereas the HBO treatment groups received additional HBO therapy for 3 and 7 days, respectively. The rats were reoperated on the third and the seventh days of anostomoses for evaluation. The bursting pressures in STA+HBO and LTA+HBO therapy groups were significantly higher than those in groups with anastomoses alone (p <. 001 and p <. 01). HBO therapy did not affect the fibrotic index neither in STA nor in LTA groups (p >. 05 for both); however, it was significantly higher in LTA+HBO group than that in STA+HBO group (p <. 05). The hydroxyproline level was significantly higher in LTA group than in STA group (p <. 05), yet HBO therapy did not affect the hydroxyproline levels in STA or LTA groups (p >. 05 for both). It is concluded that hyperbaric oxygen treatment has positive effects on colonic anastomotic healing in case of peritonitis. 相似文献
79.
80.