全文获取类型
收费全文 | 76339篇 |
免费 | 7568篇 |
国内免费 | 382篇 |
专业分类
耳鼻咽喉 | 254篇 |
儿科学 | 2676篇 |
妇产科学 | 2005篇 |
基础医学 | 3277篇 |
口腔科学 | 1629篇 |
临床医学 | 24158篇 |
内科学 | 9344篇 |
皮肤病学 | 612篇 |
神经病学 | 3054篇 |
特种医学 | 594篇 |
外科学 | 5954篇 |
综合类 | 5379篇 |
一般理论 | 65篇 |
预防医学 | 16352篇 |
眼科学 | 285篇 |
药学 | 5142篇 |
127篇 | |
中国医学 | 743篇 |
肿瘤学 | 2639篇 |
出版年
2024年 | 240篇 |
2023年 | 2636篇 |
2022年 | 3150篇 |
2021年 | 4369篇 |
2020年 | 4617篇 |
2019年 | 4594篇 |
2018年 | 4274篇 |
2017年 | 3779篇 |
2016年 | 3389篇 |
2015年 | 3243篇 |
2014年 | 5855篇 |
2013年 | 6611篇 |
2012年 | 4314篇 |
2011年 | 4408篇 |
2010年 | 3248篇 |
2009年 | 3382篇 |
2008年 | 3105篇 |
2007年 | 3238篇 |
2006年 | 2725篇 |
2005年 | 2277篇 |
2004年 | 1903篇 |
2003年 | 1463篇 |
2002年 | 1102篇 |
2001年 | 992篇 |
2000年 | 884篇 |
1999年 | 761篇 |
1998年 | 628篇 |
1997年 | 494篇 |
1996年 | 440篇 |
1995年 | 320篇 |
1994年 | 296篇 |
1993年 | 269篇 |
1992年 | 190篇 |
1991年 | 171篇 |
1990年 | 152篇 |
1989年 | 111篇 |
1988年 | 92篇 |
1987年 | 93篇 |
1986年 | 70篇 |
1985年 | 91篇 |
1984年 | 74篇 |
1983年 | 48篇 |
1982年 | 43篇 |
1981年 | 37篇 |
1980年 | 32篇 |
1979年 | 21篇 |
1978年 | 11篇 |
1977年 | 14篇 |
1976年 | 8篇 |
1975年 | 9篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
101.
Magdalena Hoffmann Christine Maria Schwarz Stefan Fürst Christina Starchl Elisabeth Lobmeyr Gerald Sendlhofer Marie-Madlen Jeitziner 《Nutrients》2021,13(1)
Critically ill patients in the intensive care unit (ICU) have a high risk of developing malnutrition, and this is associated with poorer clinical outcomes. In clinical practice, nutrition, including enteral nutrition (EN), is often not prioritized. Resulting from this, risks and safety issues for patients and healthcare professionals can emerge. The aim of this literature review, inspired by the Rapid Review Guidebook by Dobbins, 2017, was to identify risks and safety issues for patient safety in the management of EN in critically ill patients in the ICU. Three databases were used to identify studies between 2009 and 2020. We assessed 3495 studies for eligibility and included 62 in our narrative synthesis. Several risks and problems were identified: No use of clinical assessment or screening nutrition assessment, inadequate tube management, missing energy target, missing a nutritionist, bad hygiene and handling, wrong time management and speed, nutritional interruptions, wrong body position, gastrointestinal complication and infections, missing or not using guidelines, understaffing, and lack of education. Raising awareness of these risks is a central aspect in patient safety in ICU. Clinical experts can use a checklist with 12 identified top risks and the recommendations drawn up to carry out their own risk analysis in clinical practice. 相似文献
102.
《Journal of the American Medical Directors Association》2021,22(8):1599-1601
The COVID-19 pandemic has had a major impact on nursing homes (NHs), which were not prepared to manage infections among their at-risk patient populations. In order to comply with the French government's guidelines, we rapidly set up a local support platform (LSP) to help NHs manage their cases of COVID-19. The LSP comprised multidisciplinary decision support, a specialist phone hotline, mobile geriatric medicine teams, and videoconferences on COVID-19.We first quantified the LSP's interventions in 63 local NHs since the start of the first wave of COVID-19 (March 2020): 9 instances of multidisciplinary decision support, 275 calls to the specialist phone hotline, 84 interventions by mobile geriatric medicine teams, and 16 videoconferences. The LSP had been used during and between the first and second waves of the epidemic, and all had evolved to meet the NHs' needs. 相似文献
103.
《Journal of the American Medical Directors Association》2022,23(4):671-677.e4
ObjectivesWe examined whether the comorbidity burden of patients with hip fracture was associated with quality of in-hospital care reflected by fulfillment of process performance measures.DesignPopulation-based cohort study using prospectively collected data from the Danish Multidisciplinary Hip Fracture Registry (DMHFR).Setting and ParticipantsPatients aged 65 years or older with an incident hip fracture from 2014 to 2018 registered in the DMHFR (n = 31,443).MethodsComorbidity was measured using the Charlson Comorbidity Index based on hospital diagnoses. Quality of in-hospital care was defined as fulfillment of eligible process performance measures, including preoperative optimization, early surgery, early mobilization, pain assessment, basic mobility, nutritional risk, need for anti-osteoporotic medication, fall prevention, and a post-discharge rehabilitation program, reflecting guideline-recommended in-hospital care. The outcomes were (1) an all-or-none composite measure defined as fulfillment of all relevant process performance measures, and (2) fulfillment of the individual process performance measures. Using binary regression, we calculated relative risk (RR) for the association between comorbidity level and outcomes.ResultsThe overall proportion of patients with hip fracture who fulfilled the all-or-none measure was 31%. Among patients with no comorbidity, 34% fulfilled the all-or-none measure versus 29% among patients with high comorbidity (Charlson ≥ 3). This corresponds to a 15% lower chance (RR = 0.85, 95% confidence interval 0.81–0.89). Increasing comorbidity was also associated with lower fulfillment of the individual process performance measures. The largest difference was seen for preoperative optimization, early surgery, and early mobilization, where patients with high comorbidity had 6% to 11% lower chance of fulfillment of these process performance measures compared with patients without comorbidity.Conclusion and ImplicationsIncreasing level of comorbidity was associated with lower quality of in-hospital care among patients with hip fracture. Our results highlight the need for tailored clinical initiatives to ensure that comorbid patients also benefit from the positive progress in hip fracture care in recent years. 相似文献
104.
105.
While quality measures are integral to the maintenance of a high standard of patient care, high-quality care remains a complicated concept to define in the context of acute care. In this article we explore how quality can be measured in the intensive care unit. Standard outcome metrics such as mortality are tangible comparators, but do not offer a comprehensive assessment of quality for the complex heterogeneity of the intensive care population. We explore the Donabedian model as a means to describe the importance of outcomes, processes, structure and environment to inform the measurement of quality. These concepts can be more abstract and difficult to measure but can provide significant insight into the culture of a unit and the resulting performance, and thus provide a more comprehensive measure of quality. 相似文献
106.
107.
《Surgery (Oxford)》2021,39(12):802-805
The ongoing balance of service delivery and training offset with the European Working Time Directive has resulted in a requirement to review the surgical workforce and new ways of working. The extended surgical team can be utilized to support the delivery of surgical services. Surgical care practitioners are trained to care for surgical patients across the whole patient pathway: in clinics, theatre and on the ward. They are continual members of the surgical team and can support both the service and training due to the flexible nature of the role. This article gives an overview of the role of the surgical care practitioner (SCP) and how the role impacts surgical training. 相似文献
108.
《Burns : journal of the International Society for Burn Injuries》2021,47(8):1739-1747
BackgroundWhether nutrition therapy benefits all burn victims equally is unknown. To identify patients who will benefit the most from optimal nutrition, the modified Nutrition Risk in Critically Ill (mNUTRIC) Score has been validated in the Intensive Care Unit. However, the utility of mNUTRIC in severe burn victims is unknown. We hypothesized that a higher mNUTRIC (≥5) will be associated with worse clinical outcomes, but that greater nutritional adequacy will be associated with better clinical outcomes in patients with higher mNUTRIC score.MethodsThis prospective study included data from mechanically ventilated, severe burn patients (n = 359) from 51 Burn Units worldwide included in a randomized trial. Our primary and secondary outcomes were hospital mortality and the time to discharge alive (TTDA) from hospital. We described the association between nutrition performance and clinical outcomes.ResultsCompared to low mNUTRIC (n = 313), the high mNUTRIC group (n = 46) had higher mortality (61% vs. 19%, p = 0.001), and longer TTDA (>90 [87–>90] vs. 64 [38–90] days, p = <0.0001). Only in the high mNUTRIC group, increased calorie intake (per 20% increase) was associated with lower mortality and a faster TTDA.ConclusionsThe mNUTRIC score identifies those with poor clinical outcomes and may identifies those mechanically ventilated, severe burn patients in whom optimal nutrition therapy may be more advantageous. 相似文献
109.
110.
BackgroundPre-hospital care has been shown to reduce the mortality in trauma patients. The present study is an attempt to identify the status of pre-hospital orthopaedic trauma care in developing countries during COVID-19 pandemic.MethodsThis was a prospective observational study carried out in a tertiary care setup from March 25th, 2020 to January 31st, 2021. All the data pertaining to the traumatic injuries including demographic details and epidemiologic characteristics were recorded in an electronic database.ResultsA total of 1044 patients were included in the study for evaluation. The mean age was 35.24 ± 19.84 years. There were 873 males and 171 females. A total of 748 presented from nearby states, with 401 being the referrals and 347 cases coming directly to hospital. A total of 141 open fractures presented directly and 269 were referred from nearby states. Out of 269 cases of open fractures, only 67 and 139 were given intravenous antibiotics and had wound dressing done respectively at the periphery site. A total of 125, 112, 92 and 84 patients were received without traction/splintage, intravenous fluids, dose of analgesics and recording of vitals respectively. Delay from injury to presentation in emergency/administration of antibiotic (Hours) was 7.06. Road side accidents were main cause comprising of 52.58% cases. Gustilo Anderson classification grade-2 comprised of majority of the open fractures (51.63%). Lower limb fractures comprised of majority of the injuries (70.59%). Majority were adults and conservative management was the most common mode of treatment. A total of 197 and 265 patients had associated head injuries and blunt trauma chest/blunt trauma abdomen respectively.ConclusionEmphasizing on pre-hospital care measures, with special focus on co-ordination between primary, secondary and tertiary health care facilities is the need of the hour and can prevent additional morbidities, avoiding overburden of the already compromised healthcare centres. 相似文献