全文获取类型
收费全文 | 7971篇 |
免费 | 235篇 |
国内免费 | 142篇 |
专业分类
耳鼻咽喉 | 62篇 |
儿科学 | 335篇 |
妇产科学 | 163篇 |
基础医学 | 610篇 |
口腔科学 | 198篇 |
临床医学 | 788篇 |
内科学 | 1101篇 |
皮肤病学 | 87篇 |
神经病学 | 968篇 |
特种医学 | 170篇 |
外科学 | 1201篇 |
综合类 | 665篇 |
一般理论 | 1篇 |
预防医学 | 782篇 |
眼科学 | 101篇 |
药学 | 509篇 |
3篇 | |
中国医学 | 92篇 |
肿瘤学 | 512篇 |
出版年
2023年 | 172篇 |
2022年 | 232篇 |
2021年 | 350篇 |
2020年 | 321篇 |
2019年 | 251篇 |
2018年 | 279篇 |
2017年 | 224篇 |
2016年 | 202篇 |
2015年 | 186篇 |
2014年 | 550篇 |
2013年 | 531篇 |
2012年 | 321篇 |
2011年 | 426篇 |
2010年 | 304篇 |
2009年 | 364篇 |
2008年 | 377篇 |
2007年 | 357篇 |
2006年 | 309篇 |
2005年 | 275篇 |
2004年 | 224篇 |
2003年 | 199篇 |
2002年 | 154篇 |
2001年 | 142篇 |
2000年 | 145篇 |
1999年 | 129篇 |
1998年 | 120篇 |
1997年 | 95篇 |
1996年 | 93篇 |
1995年 | 96篇 |
1994年 | 86篇 |
1993年 | 84篇 |
1992年 | 81篇 |
1991年 | 85篇 |
1990年 | 77篇 |
1989年 | 70篇 |
1988年 | 61篇 |
1987年 | 54篇 |
1986年 | 51篇 |
1985年 | 48篇 |
1984年 | 40篇 |
1983年 | 19篇 |
1982年 | 33篇 |
1981年 | 23篇 |
1980年 | 26篇 |
1979年 | 14篇 |
1978年 | 10篇 |
1977年 | 13篇 |
1976年 | 13篇 |
1975年 | 12篇 |
1973年 | 6篇 |
排序方式: 共有8348条查询结果,搜索用时 15 毫秒
1.
2.
《Journal of Radiology Nursing》2022,41(3):170-179
BackgroundDespite indications for the removal of temporary inferior vena cava (IVC) filters, many filters are unintentionally left in place, predisposing patients to adverse outcomes.ObjectiveThis quality improvement study set out to determine the impact of an IVC filter retrieval protocol on filter retrieval rates and patients lost to follow-up for patients who had undergone placement of a temporary IVC filter.MethodsFollowing a quasi-experimental design, data of all consecutive patients who underwent insertion of a temporary IVC filter for a period of 24-month preprotocol and 12-month postprotocol were compared.ResultsFilter retrieval rates of eligible filters increased from 64.2% to 100%; patients lost to follow-up decreased from 35.9% to 0% (p < .01, both outcomes).ConclusionAdoption of a comprehensive IVC filter protocol by the service that implants these devices can improve filter retrieval rates and decrease patients being lost to follow-up. 相似文献
3.
《Journal of vascular and interventional radiology : JVIR》2022,33(10):1143-1150
PurposeTo report the 5-year results from the Pivotal Multicenter Trial of Ultrasound-Guided Percutaneous Arteriovenous Fistula (pAVF) Creation for Hemodialysis Access.Materials and MethodsThe retrospective review of 107 intent-to-treat (ITT) patients from the pivotal trial provided a long-term follow-up population (LTP) of 85 patients with a median follow-up duration of 50 months (range, 12–60 months). Data evaluated in the LTP group were fistula maturation and usage, secondary procedures, and complications. The Kaplan-Meier analysis of primary patency, assisted primary patency, cumulative patency, and functional patency (time from 2-needle cannulation to abandonment) were performed for the ITT population.ResultsIn the LTP, 99% (84 of 85) of fistulae were mature, with 99% (78 of 79) of patients requiring hemodialysis using their pAVF. Sustained fistula use (2-needle cannulation at the prescribed rate, 2 of 3 sessions) was achieved in 92% (78 of 85) of patients, with 7 patients not using their pAVF because they were not on dialysis (n = 4), were on peritoneal dialysis (n = 2), and refused to use fistula (n = 1). Fistula maintenance was required in 31.8% (27 of 85) of patients and included fistula dysfunction (21.2%), thrombosis (5.9%), cannulation injury (12.9%), and arm swelling (4.7%). The number of procedures performed per patient per year to maintain function and patency was 0.32 (91 of 288) for years 2–5. The cumulative patency rates were 89.5%, 88.4%, 88.4%, 85.6%, and 82.0% for years 1, 2, 3, 4, and 5, respectively. The functional patency was 91.8% at the end of the study. There were no major complications related to pAVF during the long-term follow-up.ConclusionsPercutaneous fistulae have provided clinically effective and durable access for hemodialysis with low complications. The continued use and evaluation of pAVF are warranted. 相似文献
4.
《Journal of the American Medical Directors Association》2022,23(8):1291-1296
ObjectivesTo determine which nursing home (NH) resident-level admission characteristics are associated with potentially preventable emergency department (PPED) transfers.DesignWe conducted a population-level retrospective cohort study on NH resident data collected using the Resident Assessment Instrument-Minimum Data Set Version 2.0 and linked to the National Ambulatory Care Reporting System for ED transfers.SettingWe used all NH resident admission assessments from January 1, 2017, to December 31, 2018, in Ontario.ParticipantsThe cohort included the admission assessment of 56,433 NH residents.MethodsPPED transfers were defined based on the International Classification of Disease, Version 10 (Canadian) We used logistic regression with 10-fold cross-validation and computed average marginal effects to identify the association between resident characteristics at NH admission and PPED transfers within 92 days after admission.ResultsOverall, 6.2% of residents had at least 1 PPED transfer within 92 days of NH admission. After adjustment, variables that had a prevalence of 10% or more that were associated with a 1% or more absolute increase in the risk of a PPED transfer included polypharmacy [of cohort (OC) 84.4%, risk difference (RD) 2.0%], congestive heart failure (OC 29.0%, RD 3.0%), and renal failure (OC 11.6%, RD 1.2%). Female sex (OC 63.2%, RD -1.3%), a do not hospitalize directive (OC 24.4%, RD -2.6%), change in mood (OC 66.9%, RD -1.2%), and Alzheimer's or dementia (OC 62.1%, RD -1.2%) were more than 10% prevalent and associated with a 1% or more absolute decrease in the risk of a PPED.Conclusions and ImplicationsThough many routinely collected resident characteristics were associated with a PPED transfer, the absence of sufficiently discriminating characteristics suggests that emergency department visits by NH residents are multifactorial and difficult to predict. Future studies should assess the clinical utility of risk factor identification to prevent transfers. 相似文献
5.
Robert J. Motzer MD David F. McDermott MD Bernard Escudier MD Mauricio Burotto MD Toni K. Choueiri MD Hans J. Hammers MD PhD Philippe Barthélémy MD PhD Elizabeth R. Plimack MD Camillo Porta MD Saby George MD Thomas Powles MD Frede Donskov MD PhD Howard Gurney MD Christian K. Kollmannsberger MD Marc-Oliver Grimm MD Carlos Barrios MD Yoshihiko Tomita MD PhD Daniel Castellano MD Viktor Grünwald MD PhD Brian I. Rini MD M. Brent McHenry PhD Chung-Wei Lee MD PhD Jennifer McCarthy MA Flavia Ejzykowicz PhD Nizar M. Tannir MD 《Cancer》2022,128(11):2085-2097
6.
《Cancer radiothérapie》2022,26(4):611-615
In order to provide more convenient irradiation regimens for patient comfort, radiation facility organization and health expenses, new hypofractionated protocols have been evaluated. Moderately (dose/fraction: 2.3 to 3 Gy), then ultra (dose/fraction: 5.2 to 6.1 Gy) hypofractionated irradiations were first validated. The current question is: is it possible to go forward using extreme hypofractionated regimens (EHR) based on 1 to 3 fractions. Different irradiation techniques are under investigation. However, brachytherapy remains the smartest way to deliver a high dose in a small volume. We report prospective and retrospective study results which evaluated EHR for breast and prostate brachytherapy. While oncological outcome and toxicity profile appear extremely encouraging for low-risk breast cancer after a 1 to 4 fractions (6.25 to 20 Gy/fraction), the use of a single fraction of 19 to 23 Gy appears debatable for prostate cancer. Brachytherapy represents an emblematic example of EHR but longer follow-up and more mature results are awaited in order to specify the right indications and refine the EQD2 calculation method including new biological and technical factors. 相似文献
7.
8.
目的:探讨肝移植受者延续护理中应用远程随访管理系统的效果。方法:挑选2018年6月—2019年12月医院接受治疗的60例肝移植受者,在其出院后2周以自制的远程随访管理系统对其展开居家延续护理。结果:医护小组达成了对受者术后疾病状况的远程监控,通过视频交流为病人提供706例次健康指导。所有研究对象对远程随访管理系统的接受率、掌握率、应用时间、每次视频交流时间分别为81.08%、100.00%、(10.53±2.49)d、(12.13±2.69)min。肝移植受者满意度最高的3项依次是视频交流方式、延续护理模式、指导或者咨询内容;延续护理小组满意度最高的3项依次是病情变化处理方法、视频交流方式、指导或者咨询内容。结论:通过远程随访管理,为肝移植受者开展延续护理是现实可行的,不但能使肝移植受者的术后自我管理能力得到有效提升,且受者及延续护理小组都对此系统的应用具有较高的满意度。 相似文献
9.
10.
《Clinical oncology (Royal College of Radiologists (Great Britain))》2022,34(4):230-240
AimsCurrent follow-up for head and neck cancer (HNC) is ineffective, expensive and fails to address patients' needs. The PETNECK2 trial will compare a new model of patient-initiated follow-up (PIFU) with routine scheduled follow-up. This article reports UK clinicians' views about HNC follow-up and PIFU, to inform the trial design.Materials and methodsOnline focus groups with surgeons (ear, nose and throat/maxillofacial), oncologists, clinical nurse specialists and allied health professionals. Clinicians were recruited from professional bodies, mailing lists and personal contacts. Focus groups explored views on current follow-up and acceptability of the proposed PIFU intervention and randomised controlled trial design (presented by the study co-chief investigator), preferences, margins of equipoise, potential organisational barriers and thoughts about the content and format of PIFU. Data were interpreted using inductive thematic analysis.ResultsEight focus groups with 34 clinicians were conducted. Clinicians highlighted already known limitations with HNC follow-up – lack of flexibility to address the wide-ranging needs of HNC patients, expense and lack of evidence – and agreed that follow-up needs to change. They were enthusiastic about the PETNECK2 trial to develop and evaluate PIFU but had concerns that PIFU may not suit disengaged patients and may aggravate patient anxiety/fear of recurrence and delay detection of recurrence. Anticipated issues with implementation included ensuring a reliable route back to clinic and workload burden on nurses and allied health professionals.ConclusionsClinicians supported the evaluation of PIFU but voiced concerns about barriers to help-seeking. An emphasis on patient engagement, psychosocial issues, symptom reporting and reliable, quick routes back to clinic will be important. Certain patient groups may be less suited to PIFU, which will be evaluated in the trial. Early, meaningful, ongoing engagement with clinical teams and managers around the trial rationale and recruitment process will be important to discourage selective recruitment and address risk-averse behaviour and potential workload burden. 相似文献