全文获取类型
收费全文 | 34160篇 |
免费 | 2292篇 |
国内免费 | 129篇 |
专业分类
耳鼻咽喉 | 195篇 |
儿科学 | 1062篇 |
妇产科学 | 592篇 |
基础医学 | 2666篇 |
口腔科学 | 451篇 |
临床医学 | 2067篇 |
内科学 | 5010篇 |
皮肤病学 | 543篇 |
神经病学 | 983篇 |
特种医学 | 960篇 |
外科学 | 4173篇 |
综合类 | 8196篇 |
一般理论 | 7篇 |
预防医学 | 6628篇 |
眼科学 | 246篇 |
药学 | 1500篇 |
36篇 | |
中国医学 | 680篇 |
肿瘤学 | 586篇 |
出版年
2024年 | 307篇 |
2023年 | 513篇 |
2022年 | 877篇 |
2021年 | 1171篇 |
2020年 | 1022篇 |
2019年 | 2634篇 |
2018年 | 2304篇 |
2017年 | 1282篇 |
2016年 | 603篇 |
2015年 | 672篇 |
2014年 | 1921篇 |
2013年 | 1677篇 |
2012年 | 1840篇 |
2011年 | 1919篇 |
2010年 | 1574篇 |
2009年 | 1345篇 |
2008年 | 1217篇 |
2007年 | 1061篇 |
2006年 | 964篇 |
2005年 | 641篇 |
2004年 | 476篇 |
2003年 | 400篇 |
2002年 | 262篇 |
2001年 | 245篇 |
2000年 | 206篇 |
1999年 | 193篇 |
1998年 | 143篇 |
1997年 | 143篇 |
1996年 | 109篇 |
1995年 | 112篇 |
1994年 | 90篇 |
1993年 | 39篇 |
1992年 | 17篇 |
1991年 | 26篇 |
1990年 | 17篇 |
1989年 | 14篇 |
1988年 | 14篇 |
1985年 | 674篇 |
1984年 | 1117篇 |
1983年 | 888篇 |
1982年 | 884篇 |
1981年 | 878篇 |
1980年 | 767篇 |
1979年 | 685篇 |
1978年 | 525篇 |
1977年 | 386篇 |
1976年 | 520篇 |
1975年 | 435篇 |
1974年 | 381篇 |
1973年 | 350篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
Michelle Lerman Julia A. Gaebler Sunday Hoy Jessica Izhakoff Laura Gullett Timothy Niecko Pinar Karaca-Mandic Thomas ODonnell Stanley G. Rockson 《Journal of vascular surgery》2019,69(2):571-580
Objective
Phlebolymphedema (chronic venous insufficiency-related lymphedema) is a common and costly condition. Nevertheless, there is a dearth of evidence comparing phlebolymphedema therapeutic interventions. This study sought to examine the medical resource utilization and phlebolymphedema-related cost associated with Flexitouch (FLX; Tactile Medical, Minneapolis, Minn) advanced pneumatic compression devices (APCDs) relative to conservative therapy (CONS) alone, simple pneumatic compression devices (SPCDs), and other APCDs in a representative U.S. population of phlebolymphedema patients.Methods
This was a longitudinal matched case-control analysis of deidentified private insurance claims. The study used administrative claims data from Blue Health Intelligence for the complete years 2012 through 2016. Patients were continuously enrolled for at least 18 months, diagnosed with phlebolymphedema, and received at least one claim for CONS either alone or in addition to pneumatic compression (SPCDs or APCDs). The main outcomes included direct phlebolymphedema- and sequelae-related medical resource utilization and costs.Results
After case matching, the study included 86 patients on CONS (87 on FLX), 34 on SPCDs (23 on FLX), and 69 on other APCDs (67 on FLX). Compared with CONS, FLX was associated with 69% lower per patient per year total phlebolymphedema- and sequelae-related costs net of any pneumatic compression device-related costs ($3839 vs $12,253; P = .001). This was driven by 59% fewer mean annual hospitalizations (0.13 vs 0.32; P < .001) corresponding to 82% lower inpatient costs and 55% lower outpatient hospital costs. FLX was also associated with 52% lower outpatient physical therapy and occupational therapy costs and 56% lower other outpatient-related costs. Compared with SPCDs, FLX was associated with 85% lower total costs ($1153 vs $7449; P = .008) driven by 93% lower inpatient costs ($297 vs $4215; P = .002), 84% lower outpatient hospital costs ($368 vs $2347; P = .020), and 85% lower other outpatient-related costs ($353 vs $2313; P = .023). Compared with APCDs, FLX was associated with 53% lower total costs ($3973 vs $8436; P = .032) because of lower outpatient costs and lower rates of cellulitis (22.4% vs 44.9% of patients; P = .02).Conclusions
This analysis indicates significant benefits attributable to FLX compared with alternative compression therapies that can help reduce the notable economic burden of phlebolymphedema. 相似文献2.
《Radiography》2022,28(3):746-750
IntroductionIn response to advice from The National Institute for Health and Care Excellence (1) to reduce hospital visits during COVID-19, standard headrests were introduced for head and neck radiotherapy within Northern Centre for Cancer Care (NCCC). The standard headrest requires one mould room appointment compared to 3 appointments with customised headrests.MethodsTwo groups of 10 patients treated between December 2019 and June 2020 were retrospectively analysed by 1 observer. Groups were stratified according to age, sex and tumour site. One group had customised headrest and the other had standard headrest. Five hundred and forty seven cone beam computed tomography images were reviewed. A 6 Degree of Freedom match was performed then chin, shoulder and spine position were assessed using dosimetrist drawn structures. Structures out of the tolerance were recorded. A chi-squared test was used for statistical analysis.ResultsThe out of tolerance chin position count recorded was 21 for customised headrest and 36 for standard headrest, p-value 0.046. The shoulder position count was 13 for customised headrest and 77 for standard headrest p-value <0.001. The spine position count was 3 for CHR and 21 for standard headrest, p-value <0.001. This means the headrests compared are not equivalent in terms of set up reproducibility. Overall the standard headrest group had 10 set-up re-scans and no set up re-scans were recorded in the customised headrest group.ConclusionFewer hospital visits with SHR reduce patient exposure to COVID-19. However, CHR provided a more reliable level of immobilisation in this study.Implications for practiceThe radiotherapy service will be reviewed in line with these findings. 相似文献
3.
Kyle E. Embertson Diann M. Krywko Eric R. Bunch 《The American journal of emergency medicine》2019,37(5):1005.e3-1005.e4
Nephrolithiasis is a common pathology encountered in the primary care and emergency department (ED) setting. In 2009 alone, there were over one million ED visits related to nephrolithiasis Higa et al. (2017) [1]. Emergent treatment options range from non-invasive pain control and patient education to lithotripsy and other invasive urologic procedures depending on stone location and related pathology. Urethral calculi are estimated to represent 0.3% of all urinary stone diseases Verit et al. (2006) [2]. There are very few case reports documenting distal urethral stone removal in the ED. Here we present a case of distal urethral stone impaction and the removal of this stone by ED providers, leading to expedited care and prevention of consultation and possible admission. 相似文献
4.
5.
6.
7.
Kristen E. Rhodin Vignesh Raman Oliver K. Jawitz Soraya L. Voigt Norma E. Farrow David H. Harpole Betty C. Tong Thomas A. D’Amico 《The Annals of thoracic surgery》2021,111(2):440-447
- Download : Download high-res image (251KB)
- Download : Download full-size image
8.
PurposeTo facilitate decision-making in authorship positions, the International Committee of Medical Journal Editor (ICMJE) developed a guideline that stipulates criteria authors should meet in order to merit authorship. Authors who did not meet these criteria and still enlisted as authors, are called ‘honorary’ authors. In this study, the prevalence and characteristics of honorary authorship (HA) is assessed in the field of Orthopedics and Sports Medicine.MethodsA survey was distributed among corresponding authors of articles published in 2019 in six Orthopedics-dedicated journals.Results479 of the 1392 approached authors responded, leading to a response rate of 34.4%. 91.6% of the respondents were aware of the ICMJE guidelines, whereas 67.8% were aware of the issue of HA. Overall, the prevalence of guideline-based HA was 41.9%, while the prevalence of self-perceived HA was 14.7%. Having a senior member automatically enlisted as author on the departments, was associated with a higher rate of guideline-based HA (OR 5.03) and self-perceived HA (OR 3.31).ConclusionsThe prevalence of HA in the field of Orthopedics and Sports Medicine is high, but comparable to other medical fields. Transparency in authorship decision-making is crucial to maintain liability in scientific articles. 相似文献
9.
D. Adkins J. Ley P. Oppelt H.A. Gay M. Daly R.C. Paniello R. Jackson P. Pipkorn J. Rich J. Zevallos K. Trinkaus W. Thorstad 《Clinical oncology (Royal College of Radiologists (Great Britain))》2019,31(9):e123-e131
AimsOrgan preservation, an important goal in the treatment of head and neck squamous cell carcinoma (HNSCC), may include induction chemotherapy and cisplatin with radiation therapy (CRT). To our knowledge, no reports have directly compared the impact of induction chemotherapy with that of CRT on health-related quality of life (HRQOL).Materials and methodsIn a phase II trial, we assessed the HRQOL of patients treated with induction chemotherapy followed by CRT. Eligible patients had stage III–IV HNSCC. HRQOL questionnaires were administered at baseline, the end of induction (EOI), the end of CRT (EOCRT) and after CRT. Functional Assessment of Cancer Therapy (FACT version 4) assessed HRQOL. We carried out a comparison of changes in HRQOL from baseline to EOI and from EOI to EOCRT. This trial is registered with ClinicalTrials.gov (NCT01566435).ResultsThirty patients were enrolled in the study. Most HRQOL questionnaires were completed (88%). The mean total FACT scores did not differ from baseline to EOI (general: 83.8 versus 79.1, P = 0.08; head and neck: 109.7 versus 105.8, P = 0.33; Total Outcome Index: 69.7 versus 62.3, P = 0.03; respectively, using P ≤ 0.01 to adjust for multiple simultaneous tests of differences). However, total FACT scores significantly worsened from EOI to EOCRT (79.1 versus 62.3, P = 0.01; 105.8 versus 74.2, P < 0.01; 62.3 versus 34.2, P = 0.01; respectively). Within domains, the head and neck cancer subscale score did not differ from baseline to EOI (median 28.5 versus 27.0, P = 0.69), but significantly worsened from EOI to EOCRT (27.0 versus 9.5, P < 0.01). Swallowing, oral pain and voice quality improved from baseline to EOI, but worsened from EOI to EOCRT. Physical and functional scores worsened from baseline to EOI and from EOI to EOCRT. The emotional well-being score improved from baseline to EOI but worsened from EOI to EOCRT.ConclusionsOverall, HRQOL did not significantly change from baseline to EOI but dramatically worsened from EOI to EOCRT. 相似文献
10.