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   2525篇
  免费   116篇
  国内免费   38篇
耳鼻咽喉   184篇
儿科学   52篇
妇产科学   41篇
基础医学   166篇
口腔科学   87篇
临床医学   201篇
内科学   84篇
皮肤病学   9篇
神经病学   343篇
特种医学   97篇
外科学   578篇
综合类   375篇
预防医学   73篇
眼科学   88篇
药学   151篇
  6篇
中国医学   32篇
肿瘤学   112篇
  2024年   4篇
  2023年   31篇
  2022年   97篇
  2021年   131篇
  2020年   80篇
  2019年   75篇
  2018年   71篇
  2017年   79篇
  2016年   100篇
  2015年   108篇
  2014年   187篇
  2013年   211篇
  2012年   155篇
  2011年   177篇
  2010年   109篇
  2009年   126篇
  2008年   126篇
  2007年   117篇
  2006年   104篇
  2005年   84篇
  2004年   65篇
  2003年   56篇
  2002年   34篇
  2001年   42篇
  2000年   28篇
  1999年   23篇
  1998年   20篇
  1997年   27篇
  1996年   18篇
  1995年   14篇
  1994年   15篇
  1993年   14篇
  1992年   14篇
  1991年   6篇
  1990年   9篇
  1989年   12篇
  1988年   6篇
  1987年   17篇
  1986年   7篇
  1985年   8篇
  1984年   10篇
  1982年   11篇
  1981年   4篇
  1980年   8篇
  1979年   5篇
  1978年   5篇
  1977年   5篇
  1975年   5篇
  1974年   6篇
  1972年   3篇
排序方式: 共有2679条查询结果,搜索用时 15 毫秒
11.
Anaesthetic management during awake craniotomy in a 12-year-old boy   总被引:1,自引:0,他引:1  
We present our approach to the preoperative preparation and anaesthetic management for awake craniotomy in a 12-year-old boy. Management included conscious sedation with a propofol infusion plus local anaesthetic infiltration of the scalp, periosteum, and dura. The complications which may be encountered during such procedures and their treatments are reviewed.  相似文献   
12.
Results of surgical treatment in patients with arachnoid cysts   总被引:2,自引:0,他引:2  
Summary A retrospective study of 35 patients operated upon for arachnoid cysts during the last 10 years was carried out. In 19 patients treated by craniotomy, membrane resection and drainage into the basal cisterns, clinical improvement could be noted in 13 cases. Correspondingly on the CT-controls the cysts were found to have disappeared in two cases and were reduced in size in seven patients.In 11 patients, however, who were initially treated by a shunting procedure, seven patients became free of symptoms. Postoperative CT-controls showed in three cases a significant reduction of the size of the cyst, which remained unchanged in two other cases.In five patients with the combination of a nonspace-occupying arachnoid cyst and subdural effusions, drainage of the latter only was sufficient to relieve the clinical symptoms.The prominent Endings were the high complication rate of the primary or secondary shunting procedures (48%), as well as the close correlation between the clinical outcome and the postoperative CT-controls.  相似文献   
13.
Summary The importance of the premaxillary position, size and shape in the development of the face and nose is discussed. The anthropological development of the premaxilla is studied. These factors are to be considered when cleft lip repairs are being planned and developed. Several cases are presented and discussed.  相似文献   
14.
目的 :探讨扩大翼点入路治疗重度颅脑损伤的临床价值。方法 :52例重度颅脑损伤病人采用扩大翼点入路 ,3 0例采用常规开颅方法。扩大翼点入路即在翼点入路基础上扩大暴露范围 ,包括额底、颞底及额颞顶较大范围。扩大翼点入路结合硬膜扩大缝合 ,有时采用浮动骨瓣等方法。结果 :扩大翼点入路组治愈率高于常规开颅组 (P <0 0 5) ;减少脑组织膨出发生率 (P <0 0 5)、降低再次手术率 (P <0 0 5)等方面也都优于常规开颅组。结论 :扩大翼点入路治疗重度颅脑损伤具有以下优点 :提高治愈率 ,降低脑组织膨出发生率、降低再次手术率  相似文献   
15.
报告1988年12月~1992年12月开颅术后张力性气颅5例,男4,女1.5例中3例治愈,2例死亡。开颅术后张力性气颅产生的主要原因是颅内占位性病变切除后,脑脊液丢失,使颅内压降低,甚至呈负压状态,外界的气体从切口进入颅内的腔隙,CT扫描或颅骨X线平片可以确定诊断,钻孔置管排气是活疗张力性气颅的有效方法,作者探讨了预防此种并发症发生的措施。  相似文献   
16.
Thirty randomly oriented T’s were presented in a circle around fixation at an eccentricity of 11° such that each T was crowded by its neighbors. Two locations within the same hemifield (unilateral condition) or one location in each hemifield (bilateral condition) were precued for subsequent probing. Observers were then asked to report the orientation of a target T at one of these locations. A bilateral field advantage was found: target identification was better when the two precued targets were in different hemifields than when they were within the same hemifield. This bilateral advantage was absent when only targets were presented, without any distracters. Further controls showed that this advantage could not be attributed to differences between horizontal and vertical target alignments or to visual field anisotropies. A similar bilateral advantage has been reported for multiple object tracking (Alvarez, G. A., & Cavanagh, P. (2005). Independent resources for attentional tracking in the left and right visual fields. Psychological Science 16(8), 637-643) and other attentional tasks. Our results suggest that crowding also demonstrates separate attentional resources in the left and right hemifields. There was a cost to attending to two targets presented unilaterally over attending to a single target. However, this cost was reduced when the two crowded targets were in separate hemifields.  相似文献   
17.
双侧同时开颅治疗重型颅脑损伤随机对照临床研究   总被引:1,自引:0,他引:1  
目的探讨双侧同时开颅手术治疗重型颅脑损伤(sTBI)的疗效。方法49例sTBI患者,分为双侧同时开颅手术(治疗组)和传统手术方式(对照组)并于3个月后进行COS评定。结果治疗组27例,恢复良好9例,中度残疾5例,重残4例,植物生存2例,死亡7例。对照组22例,恢复良好3例,中度残疾0例,重残3例,植物生存6例,死亡10例,(P〈0.05)。结论采用双侧同时开颅手术治疗sTBI疗效优于传统手术方式。  相似文献   
18.
目的探讨神经导航下锁孔开颅显微手术切除脑深部海绵状血管瘤的技巧及疗效。方法对15例脑深部海绵状血管病人在神经导航下行锁孔开颅,运用显微神经外科技术切除病灶。结果本组脑深部海绵状血管瘤均取得了显微镜下全切除。术中出血少,均未输血。病人术后恢复良好,无手术死亡。结论采用神经导航技术可精确定位脑深部病变,锁孔手术又是处理颅内病变的微创神经外科技术。正确应用这两项技术,结合熟练的显微神经外科技巧,可明显提高脑深部海绵状血管瘤的临床治疗效果。  相似文献   
19.
Abstract Background: Osteoporosis is characterized by low bone density and poor bone mineralization. Mid-diaphyseal stress (insufficiency) fractures of the femur caused by osteoporosis are rare. The symptoms of these lesions are vague and confusing. The physician must be alert to the possibility of femoral shaft stress fractures when evaluating an elderly patient complaining of back, hip or leg pain. Case Study: A 72-year-old osteoporotic female patient with bilateral mid-diaphyseal stress fractures of the femur is reported. The diagnosis of femoral shaft stress fracture in the elderly is very difficult when based on physical findings and plain radiography only. A magnetic resonance imaging (MRI) scan or nuclear scintigraphy is necessary for early diagnosis. In the described case, the patient had an excellent result after surgical treatment with intramedullary nails. Conclusion: MRI or nuclear scintigraphy must be obtained to exclude the possibility of femoral shaft stress fractures in the elderly. In the absence of contraindications, surgery is the best solution for this kind of lesion.  相似文献   
20.
双侧唇裂继发鼻畸形的矫正   总被引:5,自引:0,他引:5  
目的通过对双侧唇裂继发鼻畸形进行细致的病理解剖学分析,制定出具体的治疗目标,探讨矫正的有效手术方法。方法以双侧唇裂继发鼻畸形的病理解剖学为基础,将手术程序分为鼻小柱及鼻尖整形、鼻翼软骨的整形、鼻底的整形3个连续的步骤。结果自2000年以来应用上述方法手术矫正36例,其中畸形严重的双侧完全性唇裂术后患者22例,占61.6%。所有病例术后伤口均Ⅰ期愈合,鼻外形明显改善,无感染及皮瓣坏死等并发症发生。术后随访10~24个月,平均17个月,满意率高达100%。结论双侧唇裂继发鼻畸形具有其特有的病理解剖学特征,以解剖学特征基础制定具体手术方案,确保了最终疗效的满意率。  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