全文获取类型
收费全文 | 84003篇 |
免费 | 7925篇 |
国内免费 | 506篇 |
专业分类
耳鼻咽喉 | 327篇 |
儿科学 | 2760篇 |
妇产科学 | 2147篇 |
基础医学 | 3450篇 |
口腔科学 | 1730篇 |
临床医学 | 27498篇 |
内科学 | 9850篇 |
皮肤病学 | 704篇 |
神经病学 | 3360篇 |
特种医学 | 745篇 |
外国民族医学 | 1篇 |
外科学 | 7525篇 |
综合类 | 6034篇 |
一般理论 | 65篇 |
预防医学 | 16829篇 |
眼科学 | 299篇 |
药学 | 5346篇 |
122篇 | |
中国医学 | 847篇 |
肿瘤学 | 2795篇 |
出版年
2024年 | 183篇 |
2023年 | 3018篇 |
2022年 | 4243篇 |
2021年 | 5735篇 |
2020年 | 5338篇 |
2019年 | 5256篇 |
2018年 | 4541篇 |
2017年 | 4184篇 |
2016年 | 3626篇 |
2015年 | 3361篇 |
2014年 | 6128篇 |
2013年 | 6948篇 |
2012年 | 4599篇 |
2011年 | 4675篇 |
2010年 | 3479篇 |
2009年 | 3577篇 |
2008年 | 3277篇 |
2007年 | 3407篇 |
2006年 | 2848篇 |
2005年 | 2387篇 |
2004年 | 1978篇 |
2003年 | 1554篇 |
2002年 | 1200篇 |
2001年 | 1077篇 |
2000年 | 926篇 |
1999年 | 813篇 |
1998年 | 662篇 |
1997年 | 519篇 |
1996年 | 461篇 |
1995年 | 337篇 |
1994年 | 313篇 |
1993年 | 280篇 |
1992年 | 205篇 |
1991年 | 193篇 |
1990年 | 181篇 |
1989年 | 139篇 |
1988年 | 105篇 |
1987年 | 104篇 |
1986年 | 77篇 |
1985年 | 104篇 |
1984年 | 86篇 |
1983年 | 61篇 |
1982年 | 48篇 |
1981年 | 49篇 |
1980年 | 41篇 |
1979年 | 31篇 |
1978年 | 20篇 |
1977年 | 17篇 |
1976年 | 9篇 |
1975年 | 13篇 |
排序方式: 共有10000条查询结果,搜索用时 218 毫秒
81.
82.
83.
《Pancreatology》2022,22(5):665-670
Background and objectivesHyperlipasemia is highly prevalent among coronavirus disease 2019 (COVID-19) patients. The aim of this study was to assess the effect of lipase activity, measured at the time of admission, on the clinical course and mortality in COVID-19 patients.MethodsThe population of this study comprised 12,139 patients who were hospitalized due to COVID-19 between June 2020 and June 2021 in a pandemic hospital. Of these, 8819 patients were excluded from the study due to missing data, four patients were excluded due to a diagnosis of acute pancreatitis (according to the revised Atlanta criteria), and 72 patients were excluded due to alcohol use or having a history of chronic pancreatitis. The final study sample consisted of the remaining 3244 COVID-19 patients. Laboratory results, intensive care unit (ICU) follow-up periods, the need for mechanical ventilation, and mortality rates were compared between the normal lipase activity and high lipase activity groups.ResultsThere were 968 (29.8%) patients with high lipase activity at the time of admission. The rate of ICU admission was 36.1% vs. 9.9% (p < 0.001), mechanical ventilation requirement rates were 33.7% vs. 8.3% (p < 0.001), and mortality rates were as 24.6% vs. 6.4% (p < 0.001) in the high lipase activity group compared to the normal lipase activity group. Multivariate regression analysis revealed that high lipase activity was an independent factor in predicting mortality in hospitalized COVID-19 patients (odds ratio [OR]: 3.191, p < 0.001).ConclusionElevated lipase activity without acute pancreatitis at the time of admission in COVID-19 patients was determined as an independent predictor of poor prognosis. 相似文献
84.
85.
86.
87.
BackgroundPercutaneous endoscopic gastrostomy (PEG) is required for Levodopa/Carbidopa Intestinal Gel (LCIG) delivery in patients with advanced Parkinson's disease (PD) as well as for enteral feeding in a variety of neurological disorders. Buried Bumper Syndrome (BBS) is a serious complication of PEG. The frequency of BBS in patients receiving LCIG treatment has never been reported.ObjectivesTo compare the frequency of BBS in patients on LCIG treatment or on enteral feeding over the past 12 years and identify possible risk factors.MethodsWe reviewed prospectively recorded data from 2009 to 2020 on two case-series: LCIG-treated PD patients and non-PD patients on enteral nutrition. We identified all BBS incidences. Patients’ characteristics, clinical manifestations, BBS management, possible risk factors and outcomes were analyzed.ResultsDuring the 12 years, 35 PD patients underwent PEG insertion for LCIG infusion, and 123 non-PD patients for nutritional support. There were eight cases of BBS in six PD patients (17.1%). Six of them were effectively managed without treatment discontinuation. Of the enteral feeding patients, only one developed BBS (0.8%) (p < 0.001). We identified inappropriate PEG site aftercare, weight gain, early onset PD, longer survival, treatment duration, dementia and PEG system design as potential risk factors for BBS development.ConclusionsBBS occurs more frequently in LCIG patients than in patients receiving enteral feeding. If detected early, it can be successfully managed, and serious sequalae or treatment discontinuation can be avoided. Regular endoscopic follow-up visits of LCIG-treated patients and increased awareness in patients and clinicians are recommended. 相似文献
88.
89.
《Patient education and counseling》2022,105(7):2005-2011
ContextHuman connection can reduce suffering and facilitate meaningful decision-making amid the often terrifying experience of hospitalization for advanced cancer. Some conversational pauses indicate human connection, but we know little about their prevalence, distribution or association with outcomes.PurposeTo describe the epidemiology of Connectional Silence during serious illness conversations in advanced cancer.MethodsWe audio-recorded 226 inpatient palliative care consultations at two academic centers. We identified pauses lasting 2+ seconds and distinguished Connectional Silences from other pauses, sub-categorized as either Invitational (ICS) or Emotional (ECS). We identified treatment decisional status pre-consultation from medical records and post-consultation via clinicians. Patients self-reported quality-of-life before and one day after consultation.ResultsAmong all 6769 two-second silences, we observed 328 (4.8%) ECS and 240 (3.5%) ICS. ECS prevalence was associated with decisions favoring fewer disease-focused treatments (ORadj: 2.12; 95% CI: 1.12, 4.06). Earlier conversational ECS was associated with improved quality-of-life (p = 0.01). ICS prevalence was associated with clinicians' prognosis expectations.ConclusionsConnectional Silences during specialist serious illness conversations are associated with decision-making and improved patient quality-of-life. Further work is necessary to evaluate potential causal relationships.Practice implicationsPauses offer important opportunities to advance the science of human connection in serious illness decision-making. 相似文献
90.
《Revue neurologique》2019,175(9):519-527
Background and purposeHospitals admitting acute strokes should offer access to mechanical thrombectomy (MT), but local organisations are still based on facilities available before MT was proven effective. MT rates and outcomes at population levels are needed to adapt organisations. We evaluated rates of MT and outcomes in inhabitants from the North-of-France (NoF) area.MethodWe prospectively evaluated rates of MT and outcomes of patients at 3 months, good outcomes being defined as a modified Rankin scale (mRS) 0 to 2 or like the pre-stroke mRS.ResultsDuring the study period (2016–2017), 666 patients underwent MT (454, 68.1% associated with intravenous thrombolysis [IVT]). Besides, 1595 other patients received IVT alone. The rate of MT was 81 (95% confidence interval [CI] 72–90) per million inhabitants-year, ranging from 36 to 108 between districts. The rate of IVT was 249 (95% CI 234–264) per million inhabitants-year, ranging from 155 to 268. After 3 months, 279 (41.9%) patients who underwent MT had good outcomes, and 167 (25.1%) had died. Patients living outside the district of Lille where the only MT centre is, were less likely to have good outcomes at 3 months, after adjustment on age, sex, baseline severity, and delay.ConclusionThe rate of MT is one of the highest reported up to now, even in low-rate districts, but outcomes were significantly worse in patients living outside the district of Lille, and this is not only explained by the delay. 相似文献