全文获取类型
| 收费全文 | 168135篇 |
| 免费 | 6519篇 |
| 国内免费 | 404篇 |
专业分类
| 耳鼻咽喉 | 2211篇 |
| 儿科学 | 4885篇 |
| 妇产科学 | 3993篇 |
| 基础医学 | 24248篇 |
| 口腔科学 | 5520篇 |
| 临床医学 | 9698篇 |
| 内科学 | 37221篇 |
| 皮肤病学 | 4744篇 |
| 神经病学 | 13372篇 |
| 特种医学 | 4297篇 |
| 外国民族医学 | 1篇 |
| 外科学 | 19275篇 |
| 综合类 | 829篇 |
| 一般理论 | 24篇 |
| 预防医学 | 19941篇 |
| 眼科学 | 4384篇 |
| 药学 | 13056篇 |
| 中国医学 | 679篇 |
| 肿瘤学 | 6680篇 |
出版年
| 2023年 | 836篇 |
| 2022年 | 694篇 |
| 2021年 | 2687篇 |
| 2020年 | 1517篇 |
| 2019年 | 3019篇 |
| 2018年 | 4986篇 |
| 2017年 | 3105篇 |
| 2016年 | 3103篇 |
| 2015年 | 3452篇 |
| 2014年 | 3911篇 |
| 2013年 | 5972篇 |
| 2012年 | 10154篇 |
| 2011年 | 10721篇 |
| 2010年 | 5371篇 |
| 2009年 | 4011篇 |
| 2008年 | 8758篇 |
| 2007年 | 9415篇 |
| 2006年 | 9037篇 |
| 2005年 | 8617篇 |
| 2004年 | 7996篇 |
| 2003年 | 7510篇 |
| 2002年 | 7131篇 |
| 2001年 | 4951篇 |
| 2000年 | 5513篇 |
| 1999年 | 4232篇 |
| 1998年 | 826篇 |
| 1992年 | 2277篇 |
| 1991年 | 2031篇 |
| 1990年 | 2027篇 |
| 1989年 | 1754篇 |
| 1988年 | 1675篇 |
| 1987年 | 1560篇 |
| 1986年 | 1599篇 |
| 1985年 | 1492篇 |
| 1984年 | 1094篇 |
| 1983年 | 923篇 |
| 1979年 | 1230篇 |
| 1978年 | 836篇 |
| 1977年 | 815篇 |
| 1976年 | 779篇 |
| 1975年 | 912篇 |
| 1974年 | 1129篇 |
| 1973年 | 1167篇 |
| 1972年 | 1135篇 |
| 1971年 | 1099篇 |
| 1970年 | 1034篇 |
| 1969年 | 1102篇 |
| 1968年 | 1122篇 |
| 1967年 | 983篇 |
| 1966年 | 889篇 |
排序方式： 共有10000条查询结果，搜索用时 15 毫秒
1.
Elizabeth Farfán-Santos 《Medical anthropology》2019,38(6):523-536
ABSTRACTUndocumented Mexican immigrants have had to regularly confront a prohibiting health care system despite alienation, marginalization, and the threat of deportation. In this article, I explore the impact of political exclusion and alienating discourses on the health habitus of undocumented Mexican mothers through the narrative of one mother, Marta Garza, who finds herself at the painful intersection of political and medical alienation. Marta’s narrative reflects an analytical framework that centers undocumented motherhood as a space of necessary resilience and strain, wherein she is forced to advocate for her children’s health despite prohibitive barriers and dangerous potential consequences. 相似文献
2.
3.
Emiliano A. Rodríguez-Caulo Ana Guijarro-Contreras Arantza Guzón Juan Otero-Forero María José Mataró Gemma Sánchez-Espín Carlos Porras José M. Villaescusa José María Melero-Tejedor Manuel Jiménez-Navarro 《Seminars in thoracic and cardiovascular surgery》2021,33(2):328-334
- Download : Download high-res image (200KB)
- Download : Download full-size image
4.
M. Corral-Blanco V.C. Prudencio-Ribera M.E. Jarrín-Estupiñán R. Alonso-Moralejo V. Pérez-González J.C. Meneses-Pardo A. Hermira-Anchuelo A. De Pablo-Gafas 《Transplantation proceedings》2019,51(2):380-382
Background
Pulmonary hypertension (PH) is a comorbidity associated with interstitial lung disease (ILD). The purpose of this study was to evaluate the influence of PH on intrahospital mortality in lung transplantation (LT) for ILD.Methods
We conducted a retrospective cohort study of 66 patients who underwent LT for ILD at the 12 de Octubre University Hospital (Madrid, Spain) from October 2008 to June 2014. PH was defined as mean pulmonary arterial pressure (mPAP) ≥25 mmHg on right-sided heart catheterization and intrahospital mortality as any death taken place after the transplantation of patients not being discharged.Results
We retrospectively analyzed data of 66 patients; they were stratified by the presence or absence of PH before LT. Twenty-seven patients (41%) had PH. The PH group had a lower diffusing capacity of carbon monoxide (DLCO), carbon monoxide transfer coefficient (KCO), and 6-minute walk distance test (6MWT) and a higher total lung capacity (TLC), modified medical research council dyspnea scale (mMRC), and lung allocation score (LAS) than the non-PH group. Patients with PH more often underwent double lung transplantation (DLT; 59%) than single lung transplantation (SLT).Intrahospital mortality was 13% (9/66). No significant differences were observed in Kaplan-Meier survival curves for the PH and non-PH groups with a median survival time of 46 days versus 33 days (IQR 26–74; log-rank P = .056); however, the postoperative length of stay in the hospital was greater in the PH group.Conclusions
In our cohort, pulmonary hypertension was not related to early mortality in lung transplantation recipients for interstitial lung diseases. 相似文献5.
Moisés Rodríguez-Mañero Estrella López-Pardo Alberto Cordero-Fort Jose Luis Martínez-Sande Carlos Peña-Gil José Novo Platas Javier García-Seara Pilar Mazón Alfonso Varela-Román Jose María García-Acuña José Ramón González-Juanatey 《Revista portuguesa de cardiologia》2019,38(1):21-29
Introduction
Today's healthcare policies rely heavily on data that has been gathered from multiple small studies in intrinsically varied populations. We sought to describe the prevalence, comorbidities and outcomes of atrial fibrillation (AF) in the population of a specific region where all healthcare centers have implemented a common information technology (IT) structure.Methods
The total number of inhabitants was obtained from the healthcare area's IT system. Information pertaining to AF was derived from various datasets in the data warehouse of the Galician regional health service.Results
In the healthcare area of Santiago de Compostela (n=383 000), the diagnosis of AF was coded in 7990 (2.08%) individuals in 2013. Mean age was 76.83±10.5 years, mean CHA2DS2-VASc score was 3.5, 4056 (50.8%) were female and 72.6% were receiving oral anticoagulants. Up until December 31, 2015, 1361 patients died from all causes (17%), 478 (6%) of them in-hospital, with 30 deaths secondary to intracranial bleeding (0.4%) and 125 to stroke (1.6%). On multivariate analysis, age, gender, heart failure, diabetes, previous thromboembolic events and dementia were independently associated with all-cause mortality. Similarly, age, gender and previous thromboembolic events were associated with future thromboembolic events. Oral anticoagulation was found to be protective against mortality and thromboembolic events.Conclusions
In this study, we report for the first time the true prevalence of diagnosed AF and its clinical characteristics, treatment and prognosis in a Spanish healthcare area, based on the systematic integration of data available from a universally adopted health IT system within the region. 相似文献6.
Andreu Porta-Sánchez Andrew C.T. Ha Xuesong Wang Fahad Almehmadi Peter C. Austin Hadas D. Fischer Atif Al-Qubbany Diego Chemello Vijay Chauhan Eugene Downar Douglas S. Lee Kumaraswamy Nanthakumar 《The Canadian journal of cardiology》2019,35(2):169-177
Background
Catheter ablation of ventricular tachycardia (VT) can reduce the burden of ventricular arrhythmia (VA) but its effect on health care utilization and costs after such therapy is poorly known. We sought to compare the rates of cardiovascular (CV)-related hospitalizations, survival, and health care costs in patients with recurrent VT treated either with VT ablation or with medical therapy.Methods
One-hundred implantable cardioverter-defibrillator patients with structural heart disease who underwent VT ablation were included. Propensity score-matched patients with recurrent VT treated with medical therapy were identified from a prospective registry of approximately 7000 de novo implantable cardioverter-defibrillator patients. Outcomes and costs were ascertained using health administrative databases.Results
Among patients who underwent VT ablation, the cumulative rates of VA-related hospitalizations were lower in the 2 years after their ablation procedure compared with the year before (rate ratio, 0.3; 95% confidence interval [CI], 0.22-0.43). Rates of CV-related hospitalization and hospitalization because of VA post index date were similar between the VT ablation and medical therapy groups (hazard ratio [HR], 0.94; 95% CI, 0.57-1.54 and HR, 1.04; 95% CI, 0.57-1.91, respectively). Health care costs in the VT ablation patients were not increased post-ablation compared with the medical management group. The risk of all-cause mortality was lower among patients in the VT ablation group relative to the medical therapy group (HR, 0.64; 95% CI, 0.4-0.99).Conclusions
Patients who underwent VT ablation experienced a significant reduction in their rate of VA-related hospitalizations. Patients treated with VT ablation had similar rates of CV-related hospitalization compared with those treated with medical therapy without increased health care-related costs. 相似文献7.
Maria del Mar Bibiloni Jordi Fernández-Blanco Noemí Pujol-Plana Sònia Surià Sonet Maria Cèlia Pujol-Puyané Sílvia Mercadé Fuentes Laura Ojer Fernández de Soto Josep A. Tur 《Gaceta sanitaria / S.E.S.P.A.S》2019,33(2)
Objective
To assess a 6-month nutritional and physical activity intervention program on the nutritional status of overweight or obese and not very active 8-14 years old children by means of a controlled pre-post design (ACTIVA’T program).Method
Pre-post study in 8-14 years old overweight or obese and low active children from Vilafranca del Penedès (Barcelona, Spain) randomized in control group (n = 51, 47.1% girls, nutritional intervention and ≤3 h/wk physical activity) and ACTIVA’T group (n = 45, 37.8% girls, nutritional and physical activity ≥5 h/wk intervention). Body mass index, waist/height index, and diet quality by means of KIDMED test at the beginning and at the end of the program were assessed. During the intervention, each participant was accompanied by a relative (father or mother) who performed the same activities as the children.Results
Dietary recommendations have positively changed the habits of both ACTIVA’T and control group. The reversion in the prevalence of overweight and obesity was 93.8% and 58.6%, respectively, in the ACTIVA’T group, compared to 25.0% and 35.8% in the control group. Abdominal obesity was decreased from 42.2% to 17.8% in the ACTIVA’T group and from 47.1% to 27.5% in the control group.Conclusions
The program ACTIVA’T (nutritional education and physical activity promotion) improves the quality of diet and reverses the prevalence of overweight and obesity in the underactive child population. 相似文献8.
Diana Isabel Pachón-Suárez Mariana Mayorquín Ruiz Luz Elena Concha-Del-Río Rashel Cheja-Kalb Eduardo Moragrega Lourdes Arellanes-García 《Ocular immunology and inflammation》2020,28(4):626-631
ABSTRACT
Purpose
To describe the ultrabiomicroscopy (UBM) characteristics in patients with uveitic, convalescent, and recurrent Vogt-Koyanagi-Harada (VKH) disease. 相似文献9.
Markel Rico-González Fabio Yuzo Nakamura Felipe Arruda Moura José Pino-Ortega 《Research in sports medicine (Print)》2020,28(2):279-292
ABSTRACTThe aim of the study was to assess the use of different positioning systems and sampling frequencies to measure spatial-positioning variables in team sports. Articles were selected when the sampling frequency was detailed. 2,194 articles were identified and 59 works were selected for the systematic review. The sampling frequency used to measure tactical behaviour differed considerably among studies. For Global Navigation Satellite System, the sampling frequency ranged from 5- to 15 Hz for raw data, the most commonly used sampling frequency being 5 Hz. For Optic-based tracking systems, the sampling frequency ranged from 10- to 30 Hz. For Local Position System, the sampling frequency ranged from 45- to 100 Hz, the most commonly used sampling frequency being 42 Hz and 57.7 Hz. There is no common criterion in the sampling frequency used to measure each tactical variable. Further studies should investigate the impact of the sampling frequency on the measurement of the tactical variables. 相似文献
10.
Guillermo F. López-Sánchez Shahina Pardhan Mike Trott Sheila Sánchez-Castillo Sarah E Jackson Mark Tully 《Ophthalmic epidemiology》2020,27(4):272-277
ABSTRACT