全文获取类型
收费全文 | 11681篇 |
免费 | 577篇 |
国内免费 | 226篇 |
专业分类
耳鼻咽喉 | 25篇 |
儿科学 | 196篇 |
妇产科学 | 154篇 |
基础医学 | 752篇 |
口腔科学 | 30篇 |
临床医学 | 1922篇 |
内科学 | 2763篇 |
皮肤病学 | 35篇 |
神经病学 | 763篇 |
特种医学 | 1258篇 |
外国民族医学 | 1篇 |
外科学 | 1615篇 |
综合类 | 1662篇 |
预防医学 | 297篇 |
眼科学 | 23篇 |
药学 | 639篇 |
6篇 | |
中国医学 | 107篇 |
肿瘤学 | 236篇 |
出版年
2024年 | 15篇 |
2023年 | 129篇 |
2022年 | 335篇 |
2021年 | 462篇 |
2020年 | 422篇 |
2019年 | 311篇 |
2018年 | 382篇 |
2017年 | 383篇 |
2016年 | 359篇 |
2015年 | 367篇 |
2014年 | 824篇 |
2013年 | 759篇 |
2012年 | 687篇 |
2011年 | 653篇 |
2010年 | 594篇 |
2009年 | 592篇 |
2008年 | 607篇 |
2007年 | 599篇 |
2006年 | 561篇 |
2005年 | 444篇 |
2004年 | 365篇 |
2003年 | 326篇 |
2002年 | 238篇 |
2001年 | 237篇 |
2000年 | 189篇 |
1999年 | 170篇 |
1998年 | 143篇 |
1997年 | 133篇 |
1996年 | 118篇 |
1995年 | 108篇 |
1994年 | 104篇 |
1993年 | 74篇 |
1992年 | 92篇 |
1991年 | 61篇 |
1990年 | 77篇 |
1989年 | 59篇 |
1988年 | 68篇 |
1987年 | 55篇 |
1986年 | 46篇 |
1985年 | 52篇 |
1984年 | 50篇 |
1983年 | 16篇 |
1982年 | 38篇 |
1981年 | 27篇 |
1980年 | 18篇 |
1979年 | 27篇 |
1978年 | 22篇 |
1977年 | 20篇 |
1976年 | 23篇 |
1975年 | 10篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
H. Caillet P. Cauquil Y. Ajavon G. Rouhana J. P. Verdier D. Azoulay H. Bismuth J. P. Tessier 《European radiology》1992,2(4):330-334
Ruptures of the hepatic artery and hepatic pseudoaneurysms (PA) are rare but serious complications of hepatic transplantation. We conducted a retrospective study of 640 liver transplantations performed in our institution for a variety of pathologies. After surgery, seven major arterial bleeds occurred (0.9%). Of these seven cases, there were due to hepatic artery rupture (HAr) and four to PA rupture; all confirmed at either surgery (six cases) or autopsy (one case). Five of the seven patients died. In all cases the transplantation was difficult. All vascular injuries but one were caused by sepsis and occurred either after an undetermined cause septicemic syndrome (five cases) or graft dysfunction (one case). The last vascular injury was biliary drainage related. Six of the seven patients had imaging studies. Sonography (five cases) found a sub-hepatic hypoechoic collection in three cases but failed to do so in two. Duplex doppler (three cases) failed in all three cases to demonstrate a PA. Computed tomography (three cases) showed one PA, one perihilar sub-hepatic collection and failed in one. Conventional angiography (three cases) depicted a PA in all three cases. At the present time, our practice is to perform systematic angiography in patients with undetermined cause septicemic syndrome to research a PA. And if angiography is normal, to then puncture systematically any sub-hepatic collection to determine the bacteriological nature of this collection.
Correspondence to: H. Caillet 相似文献
42.
对32例出血性梗塞研究分析,发现常出现于脑栓塞及大面积脑血栓病人。以治疗中病情突然加重或持久症状不改善为特征,动态CT检查对本病的诊断及治疗有重要意义。 相似文献
43.
Rachel T. Kaiser MD 《Academic emergency medicine》1994,1(6):555-558
Air embolism produced by vaginal insufflation is an unusual but potentially lethal consequence of sexual activity, especially in the pregnant patient. Reported here is the case of a young pregnant woman who presented to the ED in full cardiac arrest, with little history to explain her condition. Despite aggressive resuscitative measures, the patient died, but her infant son was delivered via perimortem cesarean section and survived. A high level of suspicion for air embolism should be maintained for young women who unexpectedly develop cardiac arrest, particularly during sexual activity. Air embolism patients may require vigorous medical resuscitation, hyperbaric oxygen therapy, or surgical intervention to survive. The emergency physician should be familiar with the indications for perimortem cesarean delivery in the third-trimester patient presenting to the ED with cardiac arrest. 相似文献
44.
L. Molfetta A. Palermo G. De Caro F. Pipino 《Journal of orthopaedics and traumatology》2002,2(2):99-103
Thromboembolism constitutes one of the most dangerous complications during the immediate postoperative period of prosthetic
surgery. Pharmacological prophylaxis and mechanical vascular compression are not always sufficient to protect from this surgical
complication. In patients at greatest risk for thromboembolism, often with a positive history for pulmonary embolism, temporary
vena cava filters may be used to reduce the incidence of vascular and pulmonary complications. However useful, these filters
cannot be routinely used in orthopedic surgery. We present our results with the use of Filcard RFO2 vena cava filters in an
open, randomized study of 30 patients.
Received: 5 November 2001/Accepted: 30 November 2001 相似文献
45.
Summary. Divers have worked at 500 m depth in the sea and have reached 700 m in simulated chamber dives. A prerequisite for this has been extensive physiological studies of the body's reactions to pressure and pressure changes. This paper reviews such physiological and pathophysiological studies with emphasis on recent developments. 相似文献
46.
距骨的血液供应及其临床意义 总被引:30,自引:0,他引:30
本文观察了24侧尸体足标本,均无已知临床血管疾病。在死后36~48小时之间行动脉灌注ABS填充剂,以化学腐蚀和手工剔除的方法清除软组织。距骨的血供来自小腿下部三根主要动脉的分支,即跗骨管动脉和三角支、近端和远端跗骨窦动脉、颈上支及后结节血管丛。跗骨管动脉常发自足底内侧动脉,而三角支多单独自胫后动脉发出;跗骨管动脉通常比三角支和跗骨窦动脉都来得细小。以上的这些动脉相互吻合,形成了一个骨膜血管网,覆盖于全部的距骨非关节面上。而且,环绕着跗骨管、跗骨窦、距骨颈的上面和距骨体部的内侧面,由三角支、跗骨管动脉、跗骨窦动脉、颈上支及其相互之间的吻合血管网形成了一个不定形的距骨动脉环。本文还讨论了距骨缺血性坏死与动脉环的可能关系,距骨骨折脱位或手术后的缺血性坏死是由于距骨动脉环的毁损或功能受影响所致。三角支在距骨骨折脱位时具有重要意义,手术或手法复位时应注意保护。 相似文献
47.
目的:探讨选择性肾动脉栓塞治疗肾损伤的优越性及其临床应用。材料与方法:同时使用两种栓塞材料——可吸收的明胶海棉条和美国COOK公司产38-3-5弹簧栓子,治疗了两例肾剌伤患者,两例均为男性,年龄分别为20和35岁。结果:两例患者肾刺伤后均经受过保守治疗,治疗时间分别为14和22天,但未奏效。经超选择性肾内动脉分支栓塞、取得了十分满意的止血效果,后随访3~4年,患者一切感觉正常。结论:选择性肾动脉栓塞治疗肾刀刺伤后肾出血是一种安全、可靠、有效的方法。 相似文献
48.
动脉硬化性脑白质病的CT表现与临床分析 总被引:1,自引:0,他引:1
目的 :探讨动脉硬化性脑白质病的临床与CT表现特点。方法 :收集 10 0例动脉硬化性脑白质病的临床与CT资料进行综合分析。结果 :10 0例的CT表现为 :弥漫性脑白质低密度改变 ,主要分布在双侧脑室旁及半卵圆中心白质区 ,病灶多呈条带状及月晕状。合并脑萎缩 90例 ;脑梗塞 76例 ,其中 2 5例有大的梗塞灶 ,其余为腔隙性梗塞 ;脑出血 9例 ,其中位于壳核 5例 ,丘脑 3例 ,小脑 1例 ;有 15例伴发基底节区软化灶。增强扫描 8例 ,显示病灶无明显增强。结论 :动脉硬化性脑白质病是发生于老年人的缺血性脑血管病 ,高血压动脉硬化是其主要发病因素。 相似文献
49.
50.
M. S. Tverskaya V. V. Karpova A. O. Virganskii V. V. Banin L. A. Tsareva I. Zh. Satylganov R. V. Rogulenko E. I. Tikhvinskaya M. A. Chumakova I. G. Saganelidze 《Bulletin of experimental biology and medicine》1992,113(3):430-433
N. I. Pirogov Second Moscow Medical Institute. (Presented by Academician of the Academy of Medical Sciences of the USSR V. S. Savel'ev.) Translated from Byulleten' Ékperimental'noi Biologii i Meditsiny, Vol. 113, No. 3, pp. 327–329, March, 1992. 相似文献