全文获取类型
收费全文 | 15643篇 |
免费 | 1098篇 |
国内免费 | 997篇 |
专业分类
耳鼻咽喉 | 26篇 |
儿科学 | 142篇 |
妇产科学 | 32篇 |
基础医学 | 1957篇 |
口腔科学 | 75篇 |
临床医学 | 1738篇 |
内科学 | 980篇 |
皮肤病学 | 39篇 |
神经病学 | 719篇 |
特种医学 | 717篇 |
外国民族医学 | 3篇 |
外科学 | 5540篇 |
综合类 | 2952篇 |
预防医学 | 414篇 |
眼科学 | 90篇 |
药学 | 768篇 |
15篇 | |
中国医学 | 930篇 |
肿瘤学 | 601篇 |
出版年
2024年 | 85篇 |
2023年 | 322篇 |
2022年 | 588篇 |
2021年 | 759篇 |
2020年 | 711篇 |
2019年 | 482篇 |
2018年 | 465篇 |
2017年 | 571篇 |
2016年 | 611篇 |
2015年 | 588篇 |
2014年 | 1229篇 |
2013年 | 1131篇 |
2012年 | 961篇 |
2011年 | 1037篇 |
2010年 | 843篇 |
2009年 | 812篇 |
2008年 | 693篇 |
2007年 | 775篇 |
2006年 | 717篇 |
2005年 | 695篇 |
2004年 | 560篇 |
2003年 | 514篇 |
2002年 | 388篇 |
2001年 | 338篇 |
2000年 | 288篇 |
1999年 | 227篇 |
1998年 | 181篇 |
1997年 | 189篇 |
1996年 | 145篇 |
1995年 | 113篇 |
1994年 | 107篇 |
1993年 | 88篇 |
1992年 | 76篇 |
1991年 | 52篇 |
1990年 | 39篇 |
1989年 | 56篇 |
1988年 | 43篇 |
1987年 | 35篇 |
1986年 | 25篇 |
1985年 | 40篇 |
1984年 | 25篇 |
1983年 | 9篇 |
1982年 | 33篇 |
1981年 | 22篇 |
1980年 | 15篇 |
1979年 | 17篇 |
1978年 | 15篇 |
1977年 | 12篇 |
1976年 | 4篇 |
1970年 | 2篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
Anterior lumbar fusion using a hybrid interbody graft 总被引:3,自引:0,他引:3
Summary This is a radiographic report of 40 patients (20 men, 20 women) who underwent anterior lumbar interbody fusions (73 levels)
utilizing a “hybrid” interbody graft composed of femoral cortical allograft (FCA) bone and iliac crest cancellous autograft
bone. The average age at surgery was 38 years (range 17–64 years), and follow-up averaged 1.4 years (range 1.0–2.4 years).
Nineteen of the patients had undergone previous lumbar surgery. Thirty-two patients (63 levels) underwent anterior fusion
combined with some type of posterior fixation, and eight patients (10 levels) had no posterior fixation. Types of posterior
fixation included: for 20 patients (36 levels) Steffee variable screw placement fixation, for 10 patients (23 levels) translaminar
facet screws (TFS), for 1 patient (3 levels) Knodt rods and for 1 patient (1 level) facet screws. Based on the persistence
of lucent lines at the graft-host interface, three patients (one level each) were felt to have non-unions at their latest
follow-ups at 1.4, 1.5 and 2.0 years, respectively. Two of these patients had no posterior fixation, and the other had TFS
fixation. The overall fusion rate was 96% (70 of 73 levels). The fusion rate for all levels treated with posterior fixation
was 98% compared with 75% for those without fixation. Intervertebral disc heights (IVDH) were measured on all films and corrected
for magnification with computer assistance. On average, the IVDH was increased postoperatively but returned to preoperative
values at follow-up. IVDH loss was independent of the type of instrumentation used. No complications arose from the use of
the hybrid graft. Incorporation of the allograft portion of the graft is slow and was felt to be complete in only 7 of the
73 levels at follow-up. We conclude that the hybrid interbody graft technique is a safe and reliable method for performing
anterior lumbar interbody fusions and should be combined with some type of posterior fixation. Long-term follow-up will be
required to assess the behaviour of the allograft until incorporation is complete. 相似文献
22.
23.
24.
超声引导胶原酶治疗外侧型腰椎间盘突出症 总被引:3,自引:1,他引:2
目的探讨超声引导胶原酶治疗外侧型腰椎间盘突出症的疗效及安全性.方法在相应椎间盘突出的棘突间,旁开1.5~2.5cm处经皮穿刺,采用超声引导定位,穿刺成功后,先进行加压试验,再进行麻醉试验,无腰麻征象后,将胶原酶注入到突出的椎间盘内或周围.结果 231例病人出院时的优良率为92.21%,有效率为99.57%;随访1~5年的优良率为92.65%,有效率为99.58%.近期与远期疗效比较无显著性差异(χ2=0.129,P>0.05).结论利用超声引导监测、定位,注射胶原酶治疗外侧型腰椎间盘突出症,安全性强、有效率高. 相似文献
25.
26.
Lower lumbar disc surgery is an extremely common operation from which vascular complications are reported rarely. However vascular injury can occur with perforation of the anterior longitudinal ligament. External haemorrhage is uncommon and the true cause of the patient's hypotension may be misdiagnosed. If the hypotension is severe or prolonged laparotomy is indicated, to prevent exsanguination and to effect a repair of the vascular injury. Alternatively, if the injury is missed, an arteriovenous fistula may develop; this diagnosis may be delayed for months or years. One case of severe haemorrhage following lower lumbar disc surgery is reported and a further 69 cases of similar arterial injury have been reviewed from the world literature. 相似文献
27.
Summary From 1987 to 1990 the authors treated 20 cases of spondylolisthesis by an improved operative procedure including excision
of the medial part of the superior articular processes of the slipped vertebra, excision of the soft tissue between the ununited
isthmi, and excision of the ligamentum flavum between the intervertebral space above the slipped segment. In some instances
the lower portion of the lamina over the slipped vertebra should be resected. A U-shaped rod was used to hold sublaminar fixation
of two segments above and below the slipped vertebra, with the slipped vertebra spared. Utilizing the U-shaped rod as support,
bone strips were placed along the lateral and anterior sides of the rod to bridge the gap between the laminae of the displaced
vertebra. Other bone grafts were focused on the facet joints. The patients were allowed ambulation early postoperatively.
19 cases could be evaluated at preliminary follow-up. All showed satisfactory results. 相似文献
28.
本文报告157例胸腰椎骨折脱位病人,非手术治疗36例,手术治疗116例。作者对临床治疗中的有关问题进行了讨论。 相似文献
29.
腰椎间盘突出症人工椎间盘置换手术及效果 总被引:7,自引:2,他引:5
目的 :观察采用SBCharit啨人工椎间盘置换手术治疗腰椎间盘突出症的临床效果?椒?:左下腹部腹直肌旁切口 ,切断腹直肌鞘及后层 ,钝性分离腹主动脉和静脉 ,并游离到右边用棉垫加以保护。然后作一“H”型切口切开纤维环 ,用刮匙和咬骨钳清除椎间盘组织特别是髓核。将SBCharit啨人工椎间盘植入?峁?:8例中有 7例 (87.5 % )的临床效果为相当好 ,1个病人 (12 .5 % )为一般 ,有背疼或腿部症状需偶尔服药。椎体活动范围平均为 9°。没有发现有假体松动、下沉入椎体。结论 :若适应证选择得当 ,将获得满意效果。 相似文献
30.
颈椎侧块钢板在脊髓型颈椎病治疗中应用 总被引:2,自引:1,他引:1
目的 对15例脊髓型颈椎病患者行后入路椎管减压、椎板成型术的同时使用颈椎侧块钢板固定,探讨和分析该手术方法的优点和手术治疗效果。方法 从自2000年3月—2002年12月,对15例脊髓型颈椎病患者(术前颈椎MR显示有三个节段颈椎椎间盘水平病变并有黄韧带增厚突入椎管),行颈椎后入路双开门椎板成型术加双侧颈椎侧块钢板固定。按JOA评分法评定患者手术前后恢复情况。结果 本组患者男10例,女5例,随访5个月—1年2个月,平均9个月,术后2—7天(平均3.5天)可戴颈围坐起,颈围外固定时间12周,融合时间3—5个月,(平均为3.5个月),术后JOA评分明显提高,所有病人无术中血管、神经根损伤,无植骨不愈合,无内固定断裂。结论 行颈椎后入路双开门椎板成型术联合应用颈椎侧块钢板固定,从后方扩大椎管容积,对脊髓进行减压,辅助以侧块钢板对减压后的颈椎行即时的稳定的固定,增加后方所植髂骨的融合成功率,大大地减少颈椎术后后突畸形发生和术后卧床并发症的发生率。 相似文献