全文获取类型
收费全文 | 15702篇 |
免费 | 1038篇 |
国内免费 | 683篇 |
专业分类
耳鼻咽喉 | 523篇 |
儿科学 | 188篇 |
妇产科学 | 52篇 |
基础医学 | 456篇 |
口腔科学 | 82篇 |
临床医学 | 2093篇 |
内科学 | 4795篇 |
皮肤病学 | 66篇 |
神经病学 | 203篇 |
特种医学 | 1032篇 |
外国民族医学 | 2篇 |
外科学 | 3058篇 |
综合类 | 2578篇 |
预防医学 | 534篇 |
眼科学 | 69篇 |
药学 | 1110篇 |
21篇 | |
中国医学 | 208篇 |
肿瘤学 | 353篇 |
出版年
2024年 | 46篇 |
2023年 | 311篇 |
2022年 | 665篇 |
2021年 | 715篇 |
2020年 | 714篇 |
2019年 | 520篇 |
2018年 | 554篇 |
2017年 | 566篇 |
2016年 | 655篇 |
2015年 | 646篇 |
2014年 | 1276篇 |
2013年 | 1261篇 |
2012年 | 1133篇 |
2011年 | 1066篇 |
2010年 | 861篇 |
2009年 | 803篇 |
2008年 | 855篇 |
2007年 | 799篇 |
2006年 | 660篇 |
2005年 | 572篇 |
2004年 | 458篇 |
2003年 | 342篇 |
2002年 | 278篇 |
2001年 | 242篇 |
2000年 | 191篇 |
1999年 | 145篇 |
1998年 | 149篇 |
1997年 | 133篇 |
1996年 | 107篇 |
1995年 | 99篇 |
1994年 | 89篇 |
1993年 | 71篇 |
1992年 | 61篇 |
1991年 | 61篇 |
1990年 | 53篇 |
1989年 | 38篇 |
1988年 | 46篇 |
1987年 | 44篇 |
1986年 | 21篇 |
1985年 | 22篇 |
1984年 | 12篇 |
1983年 | 15篇 |
1982年 | 24篇 |
1981年 | 11篇 |
1980年 | 11篇 |
1979年 | 6篇 |
1978年 | 2篇 |
1977年 | 11篇 |
1972年 | 3篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
181.
Andre Beer-Furlan Alexander I. Evins Luigi Rigante Giulio Anichini Philip E. Stieg Antonio Bernardo 《Skull base》2014,75(3):187-197
Objective To investigate a novel dual-port endonasal and subtemporal endoscopic approach targeting midline lesions with lateral extension beyond the intracavernous carotid artery anteriorly and the Dorello canal posteriorly.
Methods Ten dual-port approaches were performed on five cadaveric heads. All specimens underwent an endoscopic endonasal approach from the sella to middle clivus. The endonasal port was combined with an anterior or posterior endoscopic extradural subtemporal approach. The anterior subtemporal port was placed directly above the middle third of the zygomatic arch, and the posterior port was placed at its posterior root. The extradural space was explored using two-dimensional and three-dimensional endoscopes.
Results The anterior subtemporal port complemented the endonasal port with direct access to the Meckel cave, lateral sphenoid sinus, superior orbital fissure, and lateral and posterosuperior compartments of the cavernous sinus; the posterior subtemporal port enhanced access to the petrous apex. Endoscopic dissection and instrument maneuverability were feasible and performed without difficulty in both the anterior and posterior subtemporal ports.
Conclusion The anterior and posterior subtemporal ports enhanced exposure and control of the region lateral to the carotid artery and Dorello canal. Dual-port neuroendoscopy is still minimally invasive yet dramatically increases surgical maneuverability while enhancing visualization and control of anatomical structures. 相似文献
182.
183.
经皮肾镜气压弹道碎石术(PCNL)是治疗肾结石的有效手段。手术过程中出血少.结石清除率高,对肾脏影响很小,逐步取代了传统的开放手术,成为肾蛄石的主要治疗方法。2010年1月~2011年6月,我科应用PCNL治疗肾结石52例,效果满意。现将结果报告如下。 相似文献
184.
《Journal of medical engineering & technology》2013,37(3):147-155
This study provides an update on the technological aspects of the methods for active removal of renal stones. Currently, extracorporeal shock wave lithotripsy (ESWL), ureteroscopy (URS) and percutaneous nephrolithotomy (PCNL) are the available options. Findings are based upon recent literature from the PubMed database and the European Association of Urology (EAU) guidelines. ESWL remains the option of choice for stones with diameter ≤ 20 mm due to its low invasive character, whereas PCNL is the standard for stones with diameter > 20 mm because of its high stone-free rates. Although ESWL treatment has become more patient friendly, its efficacy has not improved. On the other hand, URS has gained renewed interest due to new technological developments and improved treatment methods. 相似文献
185.
186.
187.
目的探讨经皮肾镜取石术(PCNL)并发出血的原因及防治对策。方法对收治的7例PCNL术后大出血患者的临床资料进行回顾性分析。结果 7例患者肾动脉造影全部明确诊断为肾动脉出血,假性动脉瘤5例,肾动静脉瘘1例,叶间动脉损伤1例,均行超选择性肾动脉栓塞治疗成功,出血停止,保留了患肾的大部分组织和功能,无严重并发症。结论术前准备充分,手术中操作程序规范,术后准确判断出血的原因并及时治疗,可以有效地防治PCNL并发出血。 相似文献
188.
《Minimally invasive therapy & allied technologies》2013,22(3):247-250
SummaryRetroperitoneoscopic procedures were already being performed in the late 1970s. The clinical breakthrough of retroperitoneoscopy, however, came in 1992 with the balloon-dissecting technique of Gaur, facilitated by the experience gained with transperitoneal laparoscopic procedures in the upper retroperitoneum. A 60 year old woman with infiltrative bladder cancer and right-sided obstructive uropathy was a high risk patient for an open surgical operation. Until now, our retroperitoneoscopic procedures were usually performed by hydraulic video-optically controlled balloon dissection. With this patient, for the first time we created a pneumoretroperitoneum using an optical trocar-Visiport. In this way we entered the retroperitoneum by visualising all layers of the abdominal wall. Once inside the retroperitoneum we created a work space by blunt and sharp dissection under optical control, avoiding blood vessels. The ureter, which was dilated by infiltrative bladder carcinoma, was easily identified, clipped and transected. The proximal end of the ureter was pulled out through the skin incision for the first trocar. The ureter was spatulated and stented, and ureterocutanostomy was performed in the same way as in open surgery. 相似文献
189.
目的探讨对于肥厚性鼻炎患者采用鼻内镜下低温等离子消融术进行治疗的临床疗效。方法随机将256例肥厚性鼻炎患者分为对照组128例与治疗组128例。对照组采用传统下鼻甲部分切除手术,治疗组采用鼻内镜下低温等离子消融术。对2组疗效进行对比分析。结果治疗组有效率显著优于对照组,术后并发症发生情况显著低于对照组,P<0.05,差异具有统计学意义。结论采用鼻内镜下低温等离子消融术治疗肥厚性鼻炎,能显著提高疗效、微创、痛苦较小、术后恢复快及并发症少,有重要临床意义。 相似文献
190.
目的探讨耳内镜下腹壁脂肪修补中央性鼓膜穿孑L的临床效果。方法回顾性分析64例(68耳)中央性鼓膜穿孔的病例资料,均于耳内镜下行腹壁脂肪修补术,术后随访3—6个月,术后6个月复查纯音测听,观察术后疗效。结果鼓膜一次性愈合63耳;鼓膜部分愈合4耳,予新鲜鸡蛋膜外贴修补后愈合;1耳未愈;一次性治愈率为92.6%(63/68)。结论耳内镜视野清晰,使用简单方便;耳内镜下腹壁脂肪修补中央性鼓膜穿孔临床效果显著,值得在基层医院推广应用。 相似文献