全文获取类型
收费全文 | 6112篇 |
免费 | 203篇 |
国内免费 | 121篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 31篇 |
妇产科学 | 18篇 |
基础医学 | 904篇 |
口腔科学 | 53篇 |
临床医学 | 584篇 |
内科学 | 443篇 |
皮肤病学 | 64篇 |
神经病学 | 155篇 |
特种医学 | 144篇 |
外科学 | 132篇 |
综合类 | 660篇 |
预防医学 | 2743篇 |
眼科学 | 17篇 |
药学 | 328篇 |
4篇 | |
中国医学 | 81篇 |
肿瘤学 | 74篇 |
出版年
2023年 | 53篇 |
2022年 | 85篇 |
2021年 | 122篇 |
2020年 | 166篇 |
2019年 | 122篇 |
2018年 | 103篇 |
2017年 | 99篇 |
2016年 | 118篇 |
2015年 | 141篇 |
2014年 | 242篇 |
2013年 | 246篇 |
2012年 | 242篇 |
2011年 | 254篇 |
2010年 | 230篇 |
2009年 | 279篇 |
2008年 | 286篇 |
2007年 | 295篇 |
2006年 | 232篇 |
2005年 | 162篇 |
2004年 | 137篇 |
2003年 | 159篇 |
2002年 | 178篇 |
2001年 | 246篇 |
2000年 | 206篇 |
1999年 | 195篇 |
1998年 | 72篇 |
1997年 | 125篇 |
1996年 | 113篇 |
1995年 | 97篇 |
1994年 | 97篇 |
1993年 | 50篇 |
1992年 | 77篇 |
1991年 | 62篇 |
1990年 | 78篇 |
1989年 | 68篇 |
1988年 | 90篇 |
1987年 | 69篇 |
1986年 | 80篇 |
1985年 | 56篇 |
1984年 | 67篇 |
1983年 | 58篇 |
1982年 | 56篇 |
1981年 | 56篇 |
1980年 | 55篇 |
1979年 | 49篇 |
1978年 | 55篇 |
1977年 | 72篇 |
1976年 | 113篇 |
1975年 | 69篇 |
1974年 | 53篇 |
排序方式: 共有6436条查询结果,搜索用时 31 毫秒
1.
目的 了解稳定期慢性阻塞性肺疾病 (chronic obstructive pulmonary disease,COPD) 患者报告结局现状,分析其影响因素及与炎症指标的相关性,为开展以患者为中心的早期护理干预提供依据。 方法 采用便利抽样法,选取2020年10月—2021年7月于南宁市某三级甲等医院呼吸内科门诊就诊的稳定期COPD患者作为调查对象,采用一般资料调查表、COPD患者报告结局量表修订版 (the Modified Patient-Reported Outcome Scale for COPD,mCOPD-PRO) 进行调查,并收集患者就诊时炎症指标的结果。采用多元线性回归分析稳定期COPD患者报告结局的影响因素,采用相关性分析探讨患者报告结局与炎症指标的关系。结果 该研究共纳入204例稳定期COPD患者,mCOPD-PRO得分为 (1.75±0.58) 分。多元线性回归分析显示,性别、合并疾病数量、病程、肺功能分级是稳定期COPD患者报告结局的影响因素 (P<0.05),可解释稳定期COPD患者报告结局10.8%的总变异。相关性分析显示,白细胞计数、中性粒细胞计数、嗜酸性粒细胞计数与稳定期COPD患者的mCOPD-PRO得分呈正相关 (P<0.05) ;总白蛋白浓度与其呈负相关 (P<0.05) 。结论 稳定期COPD患者报告结局有待改善,女性、合并疾病数量>3种、病程较长、肺功能分级较高的COPD患者报告的结局较差。COPD患者报告结局与白细胞计数、中性粒细胞计数、嗜酸性粒细胞计数、总白蛋白浓度相关。护理人员应关注稳定期COPD患者报告结局及炎症指标,在早期采取针对性的干预措施,以改善患者的生活质量。 相似文献
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.
目的通过信息化随访方式干预慢性乙型病毒性肝炎患者,对比分析其对患者疾病及用药依从性影响。方法收集2014年10月至2017年10月惠州市第六人民医院门诊及住院部诊断为慢性乙型病毒性肝炎、乙肝肝硬化患者,剔除不符合纳入条件患者,共纳入符合条件患者264例,有42例合并肝硬化。对纳入患者采取分层随机抽样方法进行分组,最终微信+电话随访组87例,电话随访组88例,对照组89例。随访并对比三组在2年后肝功能、肝硬化人数及停用恩替卡韦时间等不同差异。结果随访年后三组在失访人数上差异存在统计学意义,其中A组与B组2年后两组在ALT(Z=-3.218,P=0.02)、AST(Z=-2.749,P=0.03)、Alb(Z=1.746,P=0.04)、乙肝病毒DNA(Z=-3.231,P=0.02)指标差异具有统计学意义,而TBil、FIB-4指数、APRI、γ-GT指标差异无统计学意义。A组与C组2年后对比结果显示,两组在ALT(Z=-11.089,P<0.001)、AST(Z=-9.247,P=0.01)、TBil(Z=-7.623,P=0.01)、APRI(Z=-4.834,P=0.01)、γ-GT(Z=-2.867,P=0.03)、Alb(Z=3.187,P=0.02)、乙肝病毒DNA(Z=-10.078,P<0.001)指标差异具有统计学意义,而FIB-4指数指标差异无统计学意义。B组与C组2年后两组对比结果显示,两组在ALT(Z=-1.275,P=0.04)、AST(Z=-2.045,P=0.03)、TBil(Z=-3.762,P=0.02)、APRI(Z=-1.461,P=0.04)、γ-GT(Z=-2.254,P=0.03)、乙肝病毒DNA(Z=-1.782,P=0.04)指标差异具有统计学意义,而Alb、FIB-4指数指标差异无统计学意义。随访2年后A组肝硬化人数为12人,B组为16人,C组为24人。A组与B组(χ2=0.945,P=0.408)、B组与C组肝硬化人数(χ2=2.741,P=0.103)差异无统计学意义,而A、C两组肝硬化人数差异有统计学意义(χ2=6.843,P=0.013)。在2年时间内,A组有15例患者暂停使用恩替卡韦,B组有28例,C组有61例,三组停用恩替卡韦人数差异有统计学意义(χ2=25.061,P<0.001),通过Kaplan-meier分析,结果显示A组使用恩替卡韦时间长于B组(83.0%vs 68.5%,χ2=5.754,P=0.016)及C组(83.0%vs 33.7%,χ2=61.601,P<0.001),而B组使用时间长于C组(63.5%vs 33.7%,χ2=32.451,P<0.001)。结论通过对患者强化信息化干预,可以使患者服用抗乙肝病毒药物依从性提高,降低患者肝功能异常发生及肝硬化发病率。 相似文献
4.
5.
Matthan W. A. Caan Pierre‐Louis Bazin Jos P. Marques Gilles de Hollander Serge O. Dumoulin Wietske van der Zwaag 《Human brain mapping》2019,40(6):1786-1798
Quantitative magnetic resonance imaging generates images of meaningful physical or chemical variables measured in physical units that allow quantitative comparisons between tissue regions and among subjects scanned at the same or different sites. Here, we show that we can acquire quantitative T1, T2*, and quantitative susceptibility mapping (QSM) information in a single acquisition, using a multi‐echo (ME) extension of the second gradient‐echo image of the MP2RAGE sequence. This combination is called MP2RAGE ME, or MP2RAGEME. The simultaneous acquisition results in large time savings, perfectly coregistered data, and minimal image quality differences compared to separately acquired data. Following a correction for residual transmit B1+‐sensitivity, quantitative T1, T2*, and QSM values were in excellent agreement with those obtained from separately acquired, also B1+‐corrected, MP2RAGE data and ME gradient echo data. The quantitative values from reference regions of interests were also in very good correspondence with literature values. From the MP2RAGEME data, we further derived a multiparametric cortical parcellation, as well as a combined arterial and venous map. In sum, our MP2RAGEME sequence has the benefit in large time savings, perfectly coregistered data and minor image quality differences. 相似文献
6.
Introduction
Vestibular neurotomy is a functional surgery for Meniere's disease in the event of medical treatment failure. The aim of the study was to assess the efficacy and complications of vestibular neurotomy, and to address the question of postoperative compensation.Material and method
All patients included in this retrospective study underwent a vestibular neurotomy at our center between 2009 and 2016. A preoperative evaluation was performed including MRI, audiometry, and videonystagmography. The functional level of disability was evaluated by the Dizziness Handicap Inventory (DHI) score. In all patients suboccipital retrosigmoid approach was performed. All patients underwent early postoperative vestibular rehabilitation. One month and two years after surgery, we assessed the effectiveness of treatment on dizziness, disability and imbalance. At the time of this study (2 to 8 years), DHI and patients’ satisfaction by patient's global impression of change (PGIC) scale were evaluated.Results
Fifteen patients aged between 42 and 74 years of age were included in our study. Postoperative complications occurred in two patients (meningitis and a wound infection). At one month, all patients had a dramatic clinical improvement with decreased vertigo. Two years after surgery, 85% of the patients were cured and had no dizziness or balance disorder. Only one patient experienced bilateralization and only one had a persistent poor compensation.Conclusion
Vestibular neurotomy is a very effective treatment in the case of Meniere's disease resistant to medical treatment, with very good functional results and an extremely low failure rate. 相似文献7.
8.
Objectives:To reassess the long-term camouflage effects of resin infiltration (Icon, DMG, Hamburg, Germany) of white spot lesions (WSL) and sound adjacent enamel (SAE) achieved in a previous trial. The null hypothesis was tested that there were no significantly different CIE-L*a*b*-ΔE-values between WSL and SAE areas of assessment after at least 24 months (T24) compared to those at baseline (T0).Materials and Methods:Of twenty subjects who received previous resin infiltration treatment of nteeth = 111 nonrestored, noncavitated postorthodontic WSL after multibracket treatment during a randomized controlled trial and were contacted 20 months after baseline, eight subjects (trial teeth nteeth = 40; m/f ratio 1/7; age range (mean; SD) 12–17 [15.25; 2.12] years); response rate: 40%) were available for follow-up after at least 24 months (T24). CIE-L*a*b* differences between summarized color and lightness values (ΔEWSL/SAE) of WSL and SAE were assessed using a spectrophotometer and compared to baseline data assessed prior to infiltration (T0), and those after 6 (T6), and 12 (T12) months using paired t tests at a significance level of α = 5%.Results:T24 assessments were performed after a mean 33.86 (SD: 8.64; Min: 24; Max: 45) months following T0. Mean (SD) ΔEWSL/SAE units of available teeth were 8.76 (5.33) at baseline; 5.5 (2.75) at T6; 5.2 (2.41) at T12; and 5.57 (2.6) at T24. Comparisons of T6, T12, and T24 with T0 yielded highly significant differences, whereas T6–T24 and T12–T24 differences were found to be not significant.Conclusions:Assimilation of infiltrated WSL to the color of adjacent enamel by resin infiltration is considered to be suitable for the long-term improvement in the esthetic appearance of postorthodontic WSL. 相似文献
9.
The Lived Experiences of Patients with Head and Neck Cancer during Concurrent Chemoradiation Therapy Care Process 下载免费PDF全文
Sirikorn KongwattanakulPranom OthaganontWen Chii Tzeng 《Asian Pacific journal of cancer prevention》2020,21(12):3669-3675
Purpose: An exploration of concurrent chemoradiation therapy care process from the perspective of patients with head and neck cancer can provide an insight to their lived experience and the difficulties they encounter in daily life towards a deeper understanding of this phenomenon to shape nursing service delivery. The aims of this study were to explore the lived experiences of patients with head and neck cancer while receiving concurrent chemoradiation therapy. Methods: Data were generated from individual in-depth interviews with fifteen head and neck cancer patients, according to the semi-structured interview guidelines, at the out-patient radiation oncology department, Chulabhorn Cancer Center, Bangkok, Thailand. Results: By using Graneheim and Lundman’s content analysis, three categories from the data analysis of patients with head and neck cancer receiving concurrent chemoradiation therapy were isolated: 1) overwhelming information, 2) unpleasant symptom cluster, and 3) strategy for adherence to treatment regimen. Conclusion: The findings help to provide a better understanding of the lived experiences of patients with head and neck cancer during concurrent chemoradiation therapy, in terms of their suffering from various unpleasant side effects and how these impact their life along the treatment journey. This perspective on the care process in these patients enhances the development of a nursing care model based on patient-centered care toward positive patient outcomes. 相似文献
10.