首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   2674篇
  免费   190篇
  国内免费   68篇
耳鼻咽喉   46篇
妇产科学   9篇
基础医学   111篇
口腔科学   179篇
临床医学   609篇
内科学   63篇
皮肤病学   70篇
神经病学   498篇
特种医学   97篇
外科学   271篇
综合类   459篇
预防医学   55篇
眼科学   11篇
药学   199篇
中国医学   234篇
肿瘤学   21篇
  2024年   1篇
  2023年   37篇
  2022年   57篇
  2021年   121篇
  2020年   96篇
  2019年   80篇
  2018年   71篇
  2017年   92篇
  2016年   107篇
  2015年   80篇
  2014年   226篇
  2013年   187篇
  2012年   200篇
  2011年   211篇
  2010年   171篇
  2009年   184篇
  2008年   143篇
  2007年   113篇
  2006年   102篇
  2005年   95篇
  2004年   78篇
  2003年   63篇
  2002年   65篇
  2001年   55篇
  2000年   41篇
  1999年   34篇
  1998年   37篇
  1997年   24篇
  1996年   20篇
  1995年   15篇
  1994年   14篇
  1993年   18篇
  1992年   13篇
  1991年   17篇
  1990年   6篇
  1989年   7篇
  1988年   4篇
  1987年   8篇
  1986年   3篇
  1985年   6篇
  1984年   4篇
  1983年   3篇
  1982年   7篇
  1981年   6篇
  1980年   1篇
  1979年   3篇
  1977年   2篇
  1974年   1篇
  1973年   1篇
  1972年   2篇
排序方式: 共有2932条查询结果,搜索用时 15 毫秒
51.
目的探求与带状疱疹发病及发生后遗神经痛可能的相关因素。方法收集2007年1月至2012年8月期间北京东直门医院皮肤科135例符合入选标准的带状疱疹患者的住院病历进行回顾性分析。应用SPSS 17.0统计软件进行统计学处理。结果年龄与疱疹前驱痛、疼痛程度均无明显相关性;年龄、疱疹前驱痛、皮损疼痛程度、基础慢性病及开始治疗时间均可能是发生带状疱疹后遗神经痛的相关因素。结论带状疱疹发病、发生后遗神经痛均有一定相关因素,早发现、早治疗,尤其对于老年患者或伴有基础慢性病者防治更有意义。  相似文献   
52.
目的:探讨天麻素胶囊联合卡马西平治疗三叉神经痛的疗效。方法将60例三叉神经痛患者随机分为两组,治疗组30例给予天麻素胶囊联合卡马西平治疗,对照组30例单纯服用卡马西平,观察两组临床疗效。结果治疗组总有效率为90%,高于对照组总有效率73.3%,差异有统计学意义( P<0.05)。结论天麻素胶囊治疗原发性三叉神经痛有较好的临床疗效,值得临床应用。  相似文献   
53.
各种病因导致的三叉神经痛严重影响患者的生命健康,因对其发病机制不甚清楚,所以目前尚缺乏有效的治疗方法。临床中主要的治疗方法有药物治疗、手术治疗、放射治疗、中医治疗、基因治疗和其他疗法等,每种方法各有利弊,其中基因治疗是研究的热门方向。本文对各种方法治疗三叉神经痛的进展作一综述。  相似文献   
54.
目的:利用磁共振弥散张量成像(DTI)序列,观察显微血管减压术(MVD)后,三叉神经痛(TN)患者三叉神经的微观结构改变。方法9例原发性 TN 患者术前及术后行 DTI 扫描,测算两侧三叉神经向异性分数(FA)、平均弥散率(MD)、轴向弥散率(AD)、垂直弥散率(RD)和两侧各弥散参数差值比。按手术疗效分为治愈和未治愈两组,分析两组患者在手术前后,两侧三叉神经各 DTI 参数及两侧间各弥散参数差值比的变化。结果男性6例,女性3例;平均年龄52.1岁,平均病程5.1年。于术后第一次复查(平均12.3个月)时行 DTI ,术后疗效随访平均66个月。治愈组6例,均有明显的血管压迫,三叉神经有受压变形;未治愈组3例,2例有血管压迫,1例患者仅有严重的蛛网膜粘连而无血管压迫。治愈组术前患侧明显下降的 FA 值及明显上升的 MD 、RD 值,术后复查时均恢复。而未治愈组的各弥散参数及差值比则在手术前后无明显变化。结论 MVD 术后疼痛消失的患者,患侧三叉神经的脱髓鞘变恢复正常。然而术后疼痛仍然存在的患者,神经的脱髓鞘变依然存在。三叉神经的脱髓鞘变与 TN 关系密切。  相似文献   
55.
Several studies have suggested that vascular compression of more distal portions of the trigeminal nerve (Vth cranial nerve: VN) may cause trigeminal neuralgia (TN). However, neurosurgeons performing microvascular decompression intraoperatively cannot identify which type of myelin is being compressed by blood vessels. The aim of this study was to clarify the histological anatomy of central and peripheral myelin in the human VN. Histological analyses were conducted using photomicrographs from 134 cisternal segments of the VN from the brains of 67 cadavers. The three dimensions of the VN were measured in these sections: distance from the point at which the lateral‐most pontine VN merges with the boundary between central and peripheral myelin (line‐a), distance along the medial aspect (line‐b), and the length of the transitional zone (TZ), known as the Obersteiner‐Redlich zone. Twenty‐nine of 134 VNs were available for study. The length of central myelin ranged from 0.69 to 8.66 mm (mean, 3.56 mm; median, 3.10 mm) along the lateral aspect and from 0.36 to 5 mm (mean, 1.81 mm; median, 1.40 mm) along the medial aspect of the VN. The length of the TZ ranged from 0.31 to 3.37 mm (mean, 1.75 mm; median, 1.63 mm). We report here, for the first time, that some individuals had much longer spans of central myelin than those reported previously. Some cases of TN may thus be caused by vascular compression of VN peripheral myelin, especially in cases where central myelin is extended to an unprecedented degree. Clin. Anat. 32:541–545, 2019. © 2019 Wiley Periodicals, Inc.  相似文献   
56.
ObjectivesAnalysis of the long-term efficacy of microvascular decompression surgery in trigeminal neuralgia.Material and methodsA single-center retrospective study included patients undergoing microvascular decompression surgery for trigeminal neuralgia after failure of well-conducted medical or complementary therapy, with visualization of nerve compression syndrome on MRI.ResultsEighty-seven patients were included. Nerve compression was alleviated without interposition of polytetrafluoroethylene in 79.3% of cases. Postoperative efficacy on pain was immediate in 97.7% of cases. There were no postoperative deaths, and the rate of severe complications was low (2.3%). The efficacy of microvascular decompression surgery was total at 2 years in 90.8% of cases and at 10 years in 92.3%, without resumption of medical treatment. The failure rate was 10.3%; 26.3% of these patients had been previously treated by a lesional technique (P: 0.043) and 33.3% by interposition of polytetrafluoroethylene (P: 0.003).ConclusionsWith confirmed clinical and radiological diagnosis, microvascular decompression surgery for trigeminal nerve compression was safe, with total effectiveness in the immediate, short and long terms. It should be considered in first line in case of failure or intolerance of well-conducted medical treatment.  相似文献   
57.
58.
目的探讨射频治疗术治疗三叉神经痛的疗效及其护理措施。方法对113例原发性三叉神经痛患者均采用射频手术治疗,同时配合精心的护理实施,术后半个月采用VAS评价疗效。结果113例患者均手术顺利,无严重并发症发生,术前与术后半个月VAS比较差异具有显著意义(t=2.4024,P=O.0213)。结论射频治疗术治疗三叉神经痛疗效显著,系统的护理措施是保证射频治疗术治疗原发性三叉神经痛治疗效果的关键。  相似文献   
59.
60.

Background

Headaches are commonly evaluated in otolaryngology and often represent a diagnostic dilemma. This review addresses rhinogenic headache as well as trigeminal neuralgia and migraine, both of which can masquerade as sinus headache and whose management increasingly involves otolaryngology intervention. Discussion considers diagnostic criteria and novel therapies and derives an algorithm for clinical decision-making.

Data sources

OVID MEDLINE, Cochrane Library, and Google Scholar databases.

Methods

A literature search was performed to identify relevant articles published in the past 10?years addressing the diagnosis and management of rhinogenic headache, trigeminal neuralgia and/or migraine.

Findings

Rhinogenic headache: Identification of the specific cause must be achieved before treatment. No studies have mentioned the effect of certain therapies on the amelioration of headache. New techniques of balloon dilation for sinusitis are controversial, and their use remains contingent on surgeon preference. Removal of mucosal contact points has been shown to benefit quality of life in patients with contact point headache. Trigeminal neuralgia: Microvascular decompression is considered the gold standard for treatment, but percutaneous therapies can be effective for achieving pain control. Migraine: Patients who report amelioration of symptoms after targeted botulinum toxin injection may benefit from definitive decompression or nerve avulsion. Patients with mucosal contact points may have less favorable outcomes with migraine surgery if they are not simultaneously addressed.

Conclusions

A comprehensive understanding of the diagnostic workup and therapeutic options available for common headache etiologies is key to the management of a patient presenting with headache attributed to a rhinogenic cause.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号