全文获取类型
收费全文 | 17071篇 |
免费 | 876篇 |
国内免费 | 296篇 |
专业分类
耳鼻咽喉 | 155篇 |
儿科学 | 945篇 |
妇产科学 | 397篇 |
基础医学 | 1843篇 |
口腔科学 | 317篇 |
临床医学 | 1908篇 |
内科学 | 2527篇 |
皮肤病学 | 348篇 |
神经病学 | 232篇 |
特种医学 | 236篇 |
外科学 | 1377篇 |
综合类 | 1860篇 |
预防医学 | 3224篇 |
眼科学 | 193篇 |
药学 | 2095篇 |
9篇 | |
中国医学 | 183篇 |
肿瘤学 | 394篇 |
出版年
2023年 | 222篇 |
2022年 | 329篇 |
2021年 | 758篇 |
2020年 | 672篇 |
2019年 | 556篇 |
2018年 | 550篇 |
2017年 | 549篇 |
2016年 | 583篇 |
2015年 | 638篇 |
2014年 | 1169篇 |
2013年 | 1378篇 |
2012年 | 1202篇 |
2011年 | 1214篇 |
2010年 | 1012篇 |
2009年 | 872篇 |
2008年 | 745篇 |
2007年 | 771篇 |
2006年 | 724篇 |
2005年 | 611篇 |
2004年 | 568篇 |
2003年 | 404篇 |
2002年 | 356篇 |
2001年 | 304篇 |
2000年 | 273篇 |
1999年 | 226篇 |
1998年 | 192篇 |
1997年 | 169篇 |
1996年 | 125篇 |
1995年 | 105篇 |
1994年 | 91篇 |
1993年 | 74篇 |
1992年 | 78篇 |
1991年 | 72篇 |
1990年 | 63篇 |
1989年 | 72篇 |
1988年 | 54篇 |
1987年 | 58篇 |
1986年 | 48篇 |
1985年 | 67篇 |
1984年 | 34篇 |
1983年 | 29篇 |
1982年 | 47篇 |
1981年 | 26篇 |
1980年 | 24篇 |
1979年 | 26篇 |
1978年 | 23篇 |
1977年 | 11篇 |
1976年 | 15篇 |
1975年 | 18篇 |
1974年 | 11篇 |
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
1.
目的 分析某医院手术室患者多重耐药菌(MDRO)感染现状,找出相关因素。方法 选择2020年2月至2021年1月泸州某医院手术室12 619例成年患者作为研究对象,调查患者资料,进行病原菌检测和细菌药敏试验,统计手术室MDRO感染发生情况,分析MDRO感染的菌种、科室分布、耐药情况和MDRO感染发生的相关因素。结果 医院手术室患者MDRO感染发生率为2.10%。MDRO感染占比较大的科室是普外科(34.28%)、骨科(23.78%)、泌尿外科(15.22%)。手术室患者MDRO感染中较常见的菌种是鲍曼不动杆菌(46.99%)、金黄色葡萄球菌(19.91%)、铜绿假单胞菌(12.04%)。鲍曼不动杆菌对头孢曲松完全耐药,对氨苄青霉素、环丙沙星、头孢他啶、头孢吡肟、庆大霉素、妥布霉素耐药率超过80.00%,仅对左氧氟沙星耐药率不超过30.00%;金黄色葡萄球菌对青霉素、苯唑西林完全耐药,对红霉素、氯林可霉素的耐药率超过80.00%;铜绿假单胞菌对头孢曲松、氨苄青霉素完全耐药,对头孢他啶、环丙沙星、复方新诺明耐药率超过80.00%,仅对阿米卡星耐药率不超过30.00%。Logistic回归分析结果显示,入住ICU(OR=5.943)、侵入性操作(OR=2.704)、抗菌药物使用时间长(OR=2.244)、合并糖尿病(OR=1.955)是医院手术室患者MDRO感染的影响因素。结论 泸州某医院手术室患者MDRO感染发生率较高,可能受入住ICU、侵入性操作、抗菌药物使用时间长、合并糖尿病的影响。 相似文献
2.
Carlos Moctezuma-Velazquez Graciela Castro-Narro Pablo Simó Elisabet Viayna Susana Aceituno Maria Soler Aldo Torre 《Annals of hepatology》2022,27(2):100673
Introduction and objectivesLiver cirrhosis is a major public health issue associated with high morbidity and mortality. The ANSWER trial showed that long-term human albumin (LTA) infusions led to significant reduction of complications and mortality in patients with uncomplicated ascites. The present study aimed to assess the incremental cost of cirrhosis patients treated with LTA plus standard medical treatment (SMT) versus those treated with SMT from the perspective of the Mexican Social Security Institute (IMSS).Material and methodsCost of illness for patients with cirrhosis and grade 2-3 ascites treated with SMT or with SMT and LTA (following the treatment regimen from ANSWER) over a one-year period was estimated according to the IMSS perspective. Rates of treatments, complications and hospitalizations were based on results from the ANSWER trial. Unit costs from IMSS were gathered from public sources and transformed to 2020 Mexican $ (Mex$).ResultsThe use of LTA is estimated to require additional annual expenditure derived from the pharmacological cost of human albumin and by the follow up visits required for LTA administration (Mex$28,128). However, this cost may potentially be counterbalanced by the reduction in paracentesis, cirrhosis-related complications and hospitalizations which would lead to cost savings of Mex$33,417 per patient/year.ConclusionsBased on the ANSWER trial results, our study suggests that LTA may result in improved clinical outcomes and reduced costs for the IMSS when administered to cirrhosis patients with uncomplicated ascites. 相似文献
3.
目的:观察头孢曲松钠与头孢克肟序贯治疗下呼吸道感染患儿的效果。方法:选取312例下呼吸道感染患儿为研究对象,按照随机数字表法分为对照组和观察组各156例。两组均接受常规治疗,在此基础上,对照组采用头孢曲松钠治疗,观察组采用头孢曲松钠与头孢克肟序贯治疗。比较两组临床疗效、症状消失时间(咳嗽消失时间、退热时间、肺啰音消失时间)、治疗前后血清炎性因子[C反应蛋白(CRP)、白细胞介素-6(IL-6)、肿瘤细胞坏死因子-α(TNF-α)]水平和不良反应发生率。结果:观察组治疗总有效率为98.72%(154/156),高于对照组的94.23%(147/156),差异有统计学意义(P<0.05);观察组咳嗽消失时间、退热时间和肺啰音消失时间均短于对照组,差异有统计学意义(P<0.05);治疗后,观察组血清CRP、IL-6和TNF-α水平均低于对照组,差异有统计学意义(P<0.05);两组不良反应发生率比较,差异无统计学意义(P>0.05)。结论:头孢曲松钠与头孢克肟序贯治疗下呼吸道感染患儿,可提高治疗总有效率,缩短症状消失时间,以及降低血清炎性因子水平,效果优于单纯头孢曲松钠治疗。 相似文献
4.
K.V.P. SaiKiran Debasish Biswal Sonu Kumari Agrawal Priyam Batra Tanu Sagar S.K. Choudhary Nishant Verma Rama Chaudhry 《Indian journal of medical microbiology》2022,40(2):274-278
PurposeAnaerobic infections are common yet life-threatening. They are being recovered from all sites of the body, including the cardiovascular system. This study was aimed to determine the retrospective analysis on the isolation of anaerobes in cardiovascular samples received for a decade-long duration. It helps in knowing the frequency of isolation of anaerobic causes of cardiovascular infection.MethodsAll cardiovascular samples from the department of Cardio-thoracic vascular surgery from January 2010 to December 2020 were studied.ResultsOf 601 samples received, predominant samples were vegetations and valvular tissues of 258, followed by 98 samples of pericardial tissues, 92 samples of embolus, 90 samples of blood and post-operative collections, and 63 excised aneurysms and vascular grafts. Of the total, 15 samples grew anaerobes where Clostridium species were the predominant isolates. Clostridioides difficile was isolated in 2 samples.ConclusionsAnaerobes in cardiovascular samples are uncommon yet form a significant cause of morbidity and mortality. Most infections are from the contiguous spread, penetrating trauma, and hematogenous causing endocarditis or valvular infections. These conditions and samples form the seat of infectious focus and clinical suspicion towards the anaerobic cause of these conditions, especially in conventional routine culture-negative samples. Timely diagnosis of anaerobic infections plays a vital role in the good prognostic outcome of patients undergoing cardiothoracic and vascular surgery. 相似文献
5.
《Journal of infection and chemotherapy》2022,28(3):434-436
Tsukamurella spp. causes mainly bacteremia and central venous catheter-related bloodstream infections. To the best of our knowledge, there is no documented evidence that Tsukamurella ocularis causes catheter-related bloodstream infections like other species of Tsukamurella. We present a novel case of T. ocularis bacteremia in a 69-year-old woman with malignant cancer, wherein the patient was successfully treated with a peripherally inserted central venous catheter. We administered combination antimicrobial therapy to the patient, which was terminated only after confirming the absence of infection. We identified T. ocularis by sequencing three housekeeping genes that could not be identified using conventional mass spectrometry and 16S rRNA gene analysis. 相似文献
6.
Davide Fiore Bavaro Flavia Balena Luigi Ronga Fabio Signorile Federica Romanelli Stefania Stolfa Eleonora Sparapano Carmela De Carlo Adriana Mosca Laura Monno Gioacchino Angarano Annalisa Saracino 《Journal de Mycologie Médicale》2022,32(1):101206
An increased number of patients is at risk of Candida spp. bloodstream infection (CBSI) in modern medicine. Moreover, the rising of antifungal resistance (AR) was recently reported. All consecutive CBSI occurred in our Hospital (consisting of 1,370 beds) between 2015 and 2018, were reviewed. For each case, Candida species, AR pattern, ward involved and demographic data of patients were recorded. Overall, 304 episodes of CBSI occurred, with a median (q1:first-,q3:third quartile) of 77 (71-82) CBSI/year. Over the years, a significant increase of CBSI due to C. albicans compared to non-albicans strains was recorded in medical wards (from 65% to 71%, p=0.030), while this ratio remained stable in others. An increase of resistant strains to multiple antifungals such as C. guillermondii was noticed in recent years (from 0% to 9.8%, p=0.008). Additionally, from 2015 to 2018 an increase in fluconazole-resistance was recorded in our Hospital (from 7.4% to 17.4%, p=0.025) and a slight increase in voriconazole-resistance (from 0% to 7% in 2018, p=0.161) was observed, while resistance to echinocandin and amphotericin B remained firmly below 2%.This study suggests a rapid spread of antifungal resistance in our Hospital; therefore, an appropriate antifungal stewardship programs is urgently warranted. 相似文献
7.
Bacterial keratitis continues to be one of the leading causes of corneal blindness in the developed as well as the developing world, despite swift progress since the dawn of the “anti-biotic era”. Although, we have expeditiously developed our understanding about the different causative organisms and associated pathology leading to keratitis, extensive gaps in knowledge continue to dampen the efforts required for early and accurate diagnosis, and management in these patients, resulting in poor clinical outcomes. The ability of the causative bacteria to subdue the therapeutic challenge stems from their large genome encoding complex regulatory networks, variety of unique virulence factors, and rapid secretion of tissue damaging proteases and toxins.In this review article, we provide an overview of the established diagnostic techniques and therapeutics for keratitis caused by various bacteria. We extensively report the recent in-roads through novel tools for accurately diagnosing mono- and poly-bacterial corneal infections. Furthermore, we outline the recent progress by our groups and others in understanding the sub-cellular genomic changes that lead to antibiotic resistance in these organisms. Finally, we discuss in detail, the novel therapies and drug delivery systems in development for the efficacious management of bacterial keratitis. 相似文献
8.
摘要:目的 通过评估经鼻导管高流量湿化氧疗在肺部感染患者中的临床疗效,为肺部感染尤其是重症肺炎的患者呼吸道管理策略提供一定的参考依据。方法 2015年9月至2017年9月,采用方便抽样方法选取收治于复旦大学附属华山医院感染科的375例肺部感染患者作为研究对象。依据时间将2015年9月1日至2016年8月31日、2016年9月1日至2017年8月31日入院的患者分别纳入对照组和观察组,对照组患者接受常规治疗,观察组患者在对照组的基础上根据病情接受经鼻导管高流量湿化氧疗。比较两组患者的住院时长、气管插管(包括无创/有创气管切开)人数比例以及预后转归。在对照组和观察组的重症肺炎患者中评估接受经鼻导管高流量湿化氧疗的患者预后情况。结果 观察组重症肺炎的患者比例较对照组高,预后较对照组好,均有统计学差异(P < 0.05)。与未使用HFNC治疗的患者比较,发现接受HFNC的重症肺炎患者预后更好,有统计学差异(P < 0.05)。使用HFNC治疗后,重症肺炎患者的多个指标如呼吸频率、心率、氧饱和度、氧分压均有显著改善,均有统计学差异(P < 0.05)。结论 近年来,我院感染科收治患者的肺部感染患者人数越来越多,重症化比例也越来越高。在此情况下,医院的管理、医生的诊疗、护士的护理到位,使整体肺部感染患者的住院天数、预后转归与既往病情较轻的时候并无差异。同时,接受HFNC的重症肺炎患者,预后明显好转,表明HFNC对改善肺部感染患者预后有明显疗效。 相似文献
9.
10.