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   15095篇
  免费   1016篇
  国内免费   430篇
耳鼻咽喉   132篇
儿科学   89篇
妇产科学   75篇
基础医学   764篇
口腔科学   419篇
临床医学   1597篇
内科学   872篇
皮肤病学   79篇
神经病学   531篇
特种医学   1023篇
外国民族医学   1篇
外科学   5560篇
综合类   2492篇
一般理论   3篇
预防医学   716篇
眼科学   257篇
药学   911篇
  34篇
中国医学   755篇
肿瘤学   231篇
  2024年   14篇
  2023年   197篇
  2022年   296篇
  2021年   509篇
  2020年   644篇
  2019年   398篇
  2018年   340篇
  2017年   455篇
  2016年   543篇
  2015年   487篇
  2014年   1106篇
  2013年   1021篇
  2012年   1013篇
  2011年   1168篇
  2010年   904篇
  2009年   939篇
  2008年   836篇
  2007年   904篇
  2006年   817篇
  2005年   708篇
  2004年   644篇
  2003年   464篇
  2002年   332篇
  2001年   282篇
  2000年   229篇
  1999年   215篇
  1998年   145篇
  1997年   131篇
  1996年   100篇
  1995年   94篇
  1994年   79篇
  1993年   67篇
  1992年   59篇
  1991年   52篇
  1990年   51篇
  1989年   51篇
  1988年   27篇
  1987年   34篇
  1986年   25篇
  1985年   22篇
  1984年   25篇
  1983年   16篇
  1982年   20篇
  1981年   24篇
  1980年   21篇
  1979年   7篇
  1978年   8篇
  1977年   6篇
  1975年   7篇
  1972年   2篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
《Seminars in Arthroplasty》2022,32(4):681-687
BackgroundThe objective of this study was to compare complication rates between patients undergoing reverse shoulder arthroplasty (RSA) after a prior open reduction and internal fixation (ORIF) for proximal humerus fracture (PHF) to those undergoing RSA as a primary treatment for PHFs, glenohumeral osteoarthritis, or rotator cuff tear arthropathy (CTA).MethodsPatients who underwent RSA between 2015 and 2020 were identified in the Mariner database. Patients were separated into 3 mutually exclusive groups: (1) RSA for osteoarthritis, rotator cuff tear, or CTA (Control-RSA); (2) RSA as a primary treatment for PHF (PHF-RSA); and (3) RSA for patients with prior ORIF of PHFs (ORIF-RSA). Ninety-day medical and 2-year postoperative surgical complications were identified. In addition, patients in the PHF-RSA group were subdivided into those undergoing RSA for PHF within 3 months of the fracture (acute) vs. those treated greater than 3 months from diagnosis (delayed). Multivariate regression was performed to control for differences in comorbidities and demographics.ResultsA total of 30,824 patients underwent primary RSA for arthritis or CTA, 5389 patients underwent RSA as a primary treatment for a PHF, and 361 patients underwent RSA after ORIF of a PHF. ORIF before RSA was associated with an increased risk of overall revision (odds ratio [OR] 2.45, P = .002), infection (OR 2.40, P < .001), instability (OR 2.43, P < .001), fracture (OR 3.24, P = .001), minor medical complications (OR 1.59, P = .008), and readmission (OR 2.55, P = .001) compared with the Control-RSA cohort. RSA as a primary treatment for PHF was associated with an increased risk of 2-year revision (OR 1.60, P < .001), infection (OR 1.51, P < .001), instability (OR 2.84, P < .001), and fracture (OR 2.54, P < .001) in addition to major medical complications (OR 2.02, P < .001), minor medical complications (OR 1.92, P < .001), 90-day emergency department visits (OR 1.26, P < .001) and 90-day readmission (OR 2.03, P < .001) compared with the Control-RSA cohort. The ORIF-RSA group had an increased risk of periprosthetic infection (OR 1.94, P = .002) when compared with the PHF-RSA cohort. There were no differences in medical or surgical complications in the RSA-PHF cohort between patients treated in an acute or delayed fashion.ConclusionRSA following ORIF of a PHF is associated with increased complications compared with patients undergoing RSA for nonfracture indications. Prior ORIF of a PHF is also an independent risk factor for postoperative infection after RSA compared with patients who undergo RSA as a primary operation for fracture. The timing of RSA as a primary operation for PHF does not appear to impact the rates of postoperative medical and surgical complications.  相似文献   
3.
ObjectiveMultiple treatment options for acetabular fractures in geriatric patients exist. However, no large-scale studies have reported the outcomes of acute total hip arthroplasty (THA) in this patient population. We systematically evaluated all available evidence to characterize clinical outcomes, complications, and revisions of acute THA for acetabular fractures in geriatric patients.MethodsMeta-analysis of 21 studies of 430 acetabular fractures with mean follow-up of 44 months (range, 17−97 months). Two independent researchers searched and evaluated the databases of Ovid, Embase, and United States National Library of Medicine using a Boolean search string up to December 2019. Population demographics and complications, including presence of heterotopic ossification (HO), dislocation, infection, revision rate, neurological deficits, and venous thromboembolic event (VTE), were recorded and analyzed.ResultsWeighted mean Harris Hip Score was 83.3 points, and 20% of the patients had reported complications. The most common complication was HO, with a rate of 19.5%. Brooker grade III and IV HO rates were lower at 6.8%. Hip dislocation occurred at a rate of 6.1%, 4.1% of patients developed VTE, deep infection occurred in 3.8%, and neurological complications occurred in 1.9%. Although the revision rate was described in most studies, we were unable to perform a survival analysis because the time to each revision was described in only a few studies. The revision rate was 4.3%.ConclusionsAcute THA is a viable option for treatment of acetabular fracture and can result in acceptable clinical outcomes and survivorship rates in older patients but with an associated complication rate of approximately 20%. Considering the limited treatment options, THA might be a viable alternative for appropriately selected patients.  相似文献   
4.
目的探讨不同手术方法治疗复杂胫骨平台骨折临床疗效。方法选择2016年1月—2018年12月84例复杂胫骨平台骨折患者,随机分组。单侧锁定钢板内固定组选择单侧锁定钢板内固定手术,双侧切口双侧解剖钢板内固定组选择双侧切口双侧解剖钢板内固定。分析手术操作时间、手术失血、平均住院天数以及复杂胫骨平台骨折愈合时间;治疗前后患者视觉模拟评分和Rasmussen膝关节功能评分;膝关节僵硬发生率。结果双侧切口双侧解剖钢板内固定组视觉模拟评分和Rasmussen膝关节功能评分、手术操作时间、手术失血、平均住院天数以及复杂胫骨平台骨折愈合时间、膝关节僵硬发生率和单侧锁定钢板内固定组比较有优势,P<0.05。结论复杂胫骨平台骨折患者实施双侧切口双侧解剖钢板内固定可获得较好效果。  相似文献   
5.
6.
目的:分析比较"F"形空心钉与传统倒三角3枚平行螺钉内固定治疗青壮年Pauwels Ⅲ型股骨颈骨折的临床疗效。方法:2017年1月至2020年1月收治Pauwels Ⅲ型股骨颈骨折患者38例,根据置入钉方式的不同将其分为两组,其中A组18例,采用"F"形空心钉固定,男12例,女6例,年龄37~55岁,受伤至手术时间1~3 d。B组20例,采用传统倒三角3枚平行拉力螺钉固定,男12例,女8例,年龄35~55岁,受伤至手术时间为1~3 d。比较两组患者骨折不愈合,股骨头坏死,股骨颈短缩,空心螺钉退出情况,髋关节功能Harris评分,疼痛视觉模拟评分(visual analogue scale,VAS)。结果:所有患者获得随访,时间为15~31个月。两组患者在骨折不愈合,股骨颈短缩,股骨头坏死方面差异无统计学意义(P>0.05);两组患者在螺钉退出方面差异有统计学意义(P<0.05)。两组患者术后12个月时髋关节Harris评分及VAS评分差异均无统计学差异(P>0.05)。结论:"F"形与传统倒三角3枚平行空心钉内固定治疗青壮年Pauwels Ⅲ型股骨颈骨折中短期疗效相似,但"F"形空心钉退钉率较低。  相似文献   
7.
8.
9.
[目的]分析总结浙江近代著名临床医家邵兰荪治疗痛经的经验,以期为临床治疗提供借鉴。[方法]通过研读裘吉生编《邵氏医案》,筛选出其中治疗痛经的医案十余则,并结合邵氏在妇科方面的学术思想,进一步分析其辨证立法遣方特色,从而总结邵氏治疗痛经的临证经验。[结果]邵氏治疗痛经多从血辨治,且分虚实两端,其中属虚者血虚内热用益母胜金丹养血清热、活血止痛,血虚肝风治以养血柔肝、息风止痛;属实者水结血瘀用五苓散利水散瘀、行气止痛,气阻血滞治从行气活血、调经止痛。[结论]在治疗妇人痛经方面,邵氏辨治遣方确有独特经验,这些经验可为中医药治疗此类疾病拓宽诊治思路,有助于提高临床疗效。  相似文献   
10.
《Injury》2019,50(11):2093-2096
IntroductionCommon practice in orthopedic surgery is to obtain postoperative radiographs to evaluate for healing or complications. Images obtained in the post-anesthesia care unit (PACU) have not been shown to positively impact patient care. This study plans to evaluate the clinical utility and cost-effectiveness of PACU postoperative radiographs following tibial plateau open reduction and internal fixation (ORIF).MethodsData from 211 patients who underwent a tibial plateau ORIF over a 5-year period at a single institution were retrospectively reviewed to determine if a patient received a postoperative radiograph in the PACU. Radiograph and clinical notes were reviewed to determine if postoperative radiograph resulted in management changes. Radiograph charges were calculated using CPT codes.ResultsA total of 142 of 211 patients (67.3%) who underwent tibial plateau ORIF received a postoperative radiograph while in the PACU. The majority of the radiographs had normal findings (88.7%). Of the 142 patients with postoperative imaging, subsequent management changes occurred for only one patient (0.7%). In this case, an incidental foot fracture was found which resulted in further CT imaging to assess the fracture. Other abnormal radiograph readings (11.3%) were generally due to incidental, chronic findings that did not require management changes. The average postoperative radiograph cost was $433.55 per patient, totaling $91,480 for 142 patients over a 5-year period.ConclusionsRoutine postoperative radiographs following tibial plateau ORIF resulted in minimal management change patients in this series. The substantial cost of postoperative radiographs yielding little clinical utility suggests the use of routine PACU imaging following tibial plateau ORIF should be discontinued. Imaging would only be indicated in situations where intraoperative complications are suspected, thus reducing unnecessary imaging and patient cost.  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