全文获取类型
收费全文 | 12820篇 |
免费 | 634篇 |
国内免费 | 320篇 |
专业分类
耳鼻咽喉 | 28篇 |
儿科学 | 267篇 |
妇产科学 | 91篇 |
基础医学 | 1173篇 |
口腔科学 | 115篇 |
临床医学 | 1295篇 |
内科学 | 1025篇 |
皮肤病学 | 24篇 |
神经病学 | 689篇 |
特种医学 | 921篇 |
外科学 | 4376篇 |
综合类 | 1953篇 |
现状与发展 | 1篇 |
预防医学 | 612篇 |
眼科学 | 117篇 |
药学 | 549篇 |
13篇 | |
中国医学 | 404篇 |
肿瘤学 | 121篇 |
出版年
2024年 | 22篇 |
2023年 | 238篇 |
2022年 | 490篇 |
2021年 | 583篇 |
2020年 | 529篇 |
2019年 | 482篇 |
2018年 | 433篇 |
2017年 | 476篇 |
2016年 | 449篇 |
2015年 | 453篇 |
2014年 | 906篇 |
2013年 | 958篇 |
2012年 | 774篇 |
2011年 | 834篇 |
2010年 | 667篇 |
2009年 | 636篇 |
2008年 | 590篇 |
2007年 | 592篇 |
2006年 | 538篇 |
2005年 | 481篇 |
2004年 | 403篇 |
2003年 | 297篇 |
2002年 | 226篇 |
2001年 | 230篇 |
2000年 | 186篇 |
1999年 | 140篇 |
1998年 | 156篇 |
1997年 | 133篇 |
1996年 | 101篇 |
1995年 | 95篇 |
1994年 | 81篇 |
1993年 | 72篇 |
1992年 | 58篇 |
1991年 | 50篇 |
1990年 | 34篇 |
1989年 | 37篇 |
1988年 | 39篇 |
1987年 | 32篇 |
1986年 | 31篇 |
1985年 | 24篇 |
1984年 | 30篇 |
1983年 | 27篇 |
1982年 | 28篇 |
1981年 | 32篇 |
1980年 | 29篇 |
1979年 | 12篇 |
1978年 | 13篇 |
1977年 | 15篇 |
1976年 | 8篇 |
1975年 | 10篇 |
排序方式: 共有10000条查询结果,搜索用时 9 毫秒
11.
腕管综合征主要症状体征敏感性与特异性的比较 总被引:5,自引:1,他引:4
目的 比较腕管综合征 (carpaltunnelsyndrome ,CTS)主要症状、体征的敏感性与特异性。方法 对 10 1例 ( 162只手 )进行症状严重程度与功能状况的询问 ,感觉、运动功能的检查 ;其中 62只手在术后 6周再次测定。结果 162只患手中 15 8只具有典型症状 ( 98% )。Phalen征、前臂正中神经加压征、Semmes Weinstein单丝纤维测试阳性率分别为 98%、96%、82 %。 87%的患手出现肌力下降 ,拇短展肌肌力测定 (定量法 )结果显示 ,与徒手法相比 ,不同性别间、术前与术后的差异均具非常显著意义 (P <0 .0 1)。结论 典型症状、Phalen征、前臂正中神经加压征、拇短展肌肌力变化的敏感性与特异性最高 ,拇短展肌肌力定量法测定是判断腕管综合征严重程度、评定疗效的一个良好的客观指标。 相似文献
12.
13.
14.
A 13-year-old boy who had hemophilia A was reported with pain in the left thigh and hip on walking. He had no history of trauma. Severe hemophilia A is diagnosed with a Factor VIII level of <1 iu/dl. The presumptive diagnosis was that of a spontaneous bleed into the hip joint. Factor VIII mutational analysis revealed a C to G substitution at nucleotide 6683 which results in a cystine change at codon 2194. However, the symptoms persisted and an X-ray demonstrated the presence of an acute on chronic slip of the upper femoral epiphysis. The patient was transferred to the center treating his hemophilia where the hip was pinned in situ under cover with Factor VIII. This case demonstrates the need to be aware of a possible traumatic diagnosis of hip pain in a hemophiliac child with a longstanding history of spontaneous bleeding into joints. 相似文献
15.
小切口动力髋螺钉治疗高龄股骨转子间骨折 总被引:1,自引:0,他引:1
[目的]探讨应用小切口动力髋螺钉(DHS)微创固定治疗高龄股骨转子间骨折的方法及临床效果.[方法]回顾性分析2001年8月~2006年1月应用闭合复位、小切口DHS固定治疗37例高龄股骨转子间骨折患者,其中男15例,女22例;年龄72~92岁,平均81.5岁.在C型臂X线机监视下,先将1~2枚克氏针经皮通过大转子打入股骨头上部.另将1枚导针按135°颈干角打入股骨头中央,在导针下做一长约4~5.5 cm纵切口,经导针拧入粗拉力螺纹钉.拔出导针将带套管接骨板沿肌层下插入,并将接骨板的套管套入螺纹钉的尾端.[结果]手术时间40~75 min,平均60 min.术中平均出血55 ml.术后与术前血红蛋白值比较无明显变化.37例均获11~18个月随访,骨折愈合时间10~15周.轻度髋内翻2例,无切口感染、内固定失效及旋转畸形.按董纪元疗效评定标准,优良率94.6%.[结论]小切口DHS微创技术具有手术时间短、出血少、创伤小、并发症少、康复快的特点,是治疗高龄股骨转子间骨折较理想的方法. 相似文献
16.
自1993年1月-2000年12月,诊治腕管综合征96例,其中手术治疗31例,现将有关资料进行分析。1临床资料1.1一般资料本组96例,男25例,女71例;年龄为26~63岁,平均43岁。16例为双侧性,病程最短为1周,最长为10年。病因:腕部外伤史17例,手部关节酸痛史23例,18例女性患者认为发病与妊娠或 相似文献
17.
Carl A Kirker-Head David C Van Sickle Steve W Ek John C McCool 《Journal of orthopaedic research》2006,24(5):1095-1108
Focal full-thickness cartilage lesions of the human medial femoral condyle (MFC) can cause pain and functional impairment. Affected middle-aged patients respond unpredictably to existing treatments and knee arthroplasty may be required, prompting risk of revision. This study assesses the safety of, and biological and functional response to, a metallic resurfacing implant which may delay or obviate the need for traditional arthroplasty. The anatomic contour of the surgically exposed MFC of six adult goats was digitally mapped and an 11 mm diameter full-thickness osteochondral defect was created. An anchor-based Co-Cr resurfacing implant, matching the mapped articular contour, was implanted. Each goat's contralateral unoperated femorotibial joint was used as a control. Postoperative outcome was assessed by lameness examination, radiography, arthroscopy, synoviocentesis, necropsy, and histology up to 26 (n = 3) or 52 (n = 3) weeks. By postoperative week (POW) 4, goats demonstrated normal range of motion, no joint effusion, and only mild lameness in the operated limb. By POW 26 the animals were sound with only occasional very mild lameness. Arthroscopy at POW 14 revealed moderate synovial inflammation and a chondral membrane extending centrally across the implant surface. Radiographs at POWs 14 to 52 implied implant stability in the operated joints, as well as subchondral bone remodeling and mild exostosis formation in the operated and contralateral unoperated joints of some goats. By POW 26, histology revealed new trabecular bone abutting the implant. At POWs 26 and 52 MFC cartilage was metachromatic and intact in the operated and unoperated femorotibial joints. Proximal tibiae of some operated and unoperated limbs demonstrated limited subchondral bone remodeling and foci of articular cartilage fibrillation and thinning. The chondral membrane crossing the prosthesis possessed a metachromatic matrix containing singular and clustered chondrocytes. Our data imply the safety, biocompatibility, and functionality of the implant. Focal articular damage was documented in the operated joints at POWs 26 and 52, but lesions were much reduced over those previously reported in untreated defects. Expanded animal or preclinical human studies are justified. 相似文献
18.
术中电生理检测在肘管综合征的应用 总被引:1,自引:0,他引:1
杨淳彭 《天津医科大学学报》2004,10(2):204-205
目的 :探讨术中电生理监测在肘管综合征手术中的临床应用价值。方法 :对25例肘管综合征手术患者进行尺神经松解前后的电生理术中监测。结果 :术中尺神经肘管松解前后 ,传导速度提高50% ,潜伏期缩短30%,其中传导速度的改善有显著意义(P<0.05)。结论 :传导速度是较敏感的术中监测参数。肘管综合征术中应用电生理检测有一定临床意义。 相似文献
19.
MD Charles D. Hummer III MD PhD Richard H. Rothman MD William J. Hozack 《The Journal of arthroplasty》1995,10(6)
Catastrophic failure of two zirconia—ceramic modular femoral heads occurred, despite the theoretical improved toughness of zirconia—ceramic relative to alumina—ceramic. This experience led the authors to return to cobalt—chromium as the metal of choice for articulation against polyethylene in total hip arthroplasty. 相似文献
20.
Keuk Shun Shin M.D. Seum Chung M.D. Hye Kyung Lee M.D. Jae Duk Lew M.D. 《Aesthetic plastic surgery》1996,20(1):69-76
Reduction mammaplasty was performed in 30 patients by combining the central pedicle flap method with the short submammary scar (3-S) technique to avoid the common drawbacks of currently popular dermoglandular procedures. Reduction was accomplished by using perforating vascular branches from the pectoralis major muscle and its fascia supplying the nipple and breast parenchyme instead of the subdermal plexus. The central vascular pedicle supplying the nipple-areola complex was preserved. Only the periphery of the breast parenchyme was resected circumferentially, with the exception of the inferolateral portion, so as not to injure the sensory nerve. The remaining breast parenchyme was preserved in an inverted cone shape. The nipple-areola complex was safely transposed with great freedom, and the amount of resection was accurately adjusted for symmetry. No cases of nipple-areola complex sensory change occurred postoperatively, and lactation is possible because of preservation of the lactiferous ducts. The length of postoperative scars was reduced by using the short submammary scar technique. We believe this combined method is ideal in patients requiring resections ranging from 200 to 600 g per breast with good skin elasticity and moderate degree of ptosis.Presented at the Sixth Asian Pacific Congress of the International Confederation for Plastic and Reconstructive Surgery, in Seoul, Korea, October 1993. 相似文献