全文获取类型
收费全文 | 82670篇 |
免费 | 4593篇 |
国内免费 | 3842篇 |
学科分类
医药卫生 | 91105篇 |
出版年
2024年 | 56篇 |
2023年 | 380篇 |
2022年 | 740篇 |
2021年 | 959篇 |
2020年 | 927篇 |
2019年 | 504篇 |
2018年 | 722篇 |
2017年 | 815篇 |
2016年 | 742篇 |
2015年 | 1158篇 |
2014年 | 1510篇 |
2013年 | 2004篇 |
2012年 | 3005篇 |
2011年 | 5988篇 |
2010年 | 4017篇 |
2009年 | 3109篇 |
2008年 | 3625篇 |
2007年 | 3366篇 |
2006年 | 3400篇 |
2005年 | 4111篇 |
2004年 | 8169篇 |
2003年 | 7435篇 |
2002年 | 5798篇 |
2001年 | 4675篇 |
2000年 | 2819篇 |
1999年 | 3287篇 |
1998年 | 2327篇 |
1997年 | 2056篇 |
1996年 | 1341篇 |
1995年 | 1150篇 |
1994年 | 1197篇 |
1993年 | 1793篇 |
1992年 | 1536篇 |
1991年 | 1342篇 |
1990年 | 998篇 |
1989年 | 840篇 |
1988年 | 637篇 |
1987年 | 531篇 |
1986年 | 515篇 |
1985年 | 255篇 |
1984年 | 141篇 |
1983年 | 94篇 |
1982年 | 76篇 |
1981年 | 79篇 |
1980年 | 58篇 |
1979年 | 77篇 |
1978年 | 59篇 |
1977年 | 65篇 |
1975年 | 70篇 |
1973年 | 54篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
S. M. White C. L. Shelton A. W. Gelb C. Lawson F. McGain J. Muret J. D. Sherman representing the World Federation of Societies of Anaesthesiologists Global Working Group on Environmental Sustainability in Anaesthesia 《Anaesthesia》2022,77(2):201-212
The Earth’s mean surface temperature is already approximately 1.1°C higher than pre-industrial levels. Exceeding a mean 1.5°C rise by 2050 will make global adaptation to the consequences of climate change less possible. To protect public health, anaesthesia providers need to reduce the contribution their practice makes to global warming. We convened a Working Group of 45 anaesthesia providers with a recognised interest in sustainability, and used a three-stage modified Delphi consensus process to agree on principles of environmentally sustainable anaesthesia that are achievable worldwide. The Working Group agreed on the following three important underlying statements: patient safety should not be compromised by sustainable anaesthetic practices; high-, middle- and low-income countries should support each other appropriately in delivering sustainable healthcare (including anaesthesia); and healthcare systems should be mandated to reduce their contribution to global warming. We set out seven fundamental principles to guide anaesthesia providers in the move to environmentally sustainable practice, including: choice of medications and equipment; minimising waste and overuse of resources; and addressing environmental sustainability in anaesthetists’ education, research, quality improvement and local healthcare leadership activities. These changes are achievable with minimal material resource and financial investment, and should undergo re-evaluation and updates as better evidence is published. This paper discusses each principle individually, and directs readers towards further important references. 相似文献
2.
目的 通过研究明确苗药五藤膏外敷缓解胶原诱导性关节炎(CIA)大鼠关节局部炎症和骨破坏的机制,证实苗医外治就近驱邪的作用。方法 将70只Wistar大鼠随机分为空白组、模型组、苗药五藤膏高、中、低剂量组、扶他林组及IL-17阻断组,每组10只。除空白组外,其余6组均构建CIA模型,并给予相应的外敷治疗。观察大鼠一般情况,HE染色进行病理学分析,TRAP染色检测OC生成,ELISA检测各炎症因子的含量,RT-PCR和WB分别检测RANKL的基因及蛋白表达。结果 苗药五藤膏能改善CIA大鼠破骨细胞浸润及关节病理性结构,并降低RANKL蛋白、基因表达以及TNF-α、IL-1、IL-6、IL-17含量。结论 苗药五藤膏外敷剂对CIA大鼠的治疗机制可能与降低致炎因子的分泌,抑制RANKL及OC的表达相关。 相似文献
4.
The group of Professor Ning Jiao and Professor Song Song have made new progress in the field of electrophilic halogenation modification of electron-deficient aromatics 下载免费PDF全文
5.
目的 观察超声引导下关节腔内注射重组人Ⅱ型肿瘤坏死因子受体-抗体融合蛋白(益赛普)治疗血友病性关节病(HA)的价值。方法 回顾性分析32例接受超声引导下穿刺关节腔注射益赛普的HA患者,对比观察治疗前及治疗后1个月血友病关节健康评分(HJHS)、视觉模拟评分(VAS),以及超声所示目标关节增生滑膜厚度、血流信号、Melchiorre及中国早期血友病性关节病超声检测(HEAD-US-C)评分,评估其治疗价值。结果 对32例均成功完成超声引导下穿刺关节腔及腔内注射益赛普,共对18例膝关节、7例肘关节及7例踝关节进行治疗。术后未出现感染、出血等并发症。治疗后1个月,目标关节HJHS、VAS、Melchiorre评分、HEAD-US-C评分及增生滑膜最大厚度、平均厚度、血流信号均低于治疗前(P均<0.01)。结论 超声引导下关节腔内注射益赛普治疗HA安全、有效。 相似文献
6.
为了实现超声对比剂(也称超声造影剂)高效、合理、安全、规范化输注,国内相关医护专家总结了国内外文献证据及临床经验,按照循证医学原则充分讨论后,制订了该共识,旨在为我国超声对比剂安全输注的规范化和标准化提供参考意见。共识介绍了超声对比剂的应用现状和安全性、相关法规与流程,造影前、中、后的规范化护理,并提出16条推荐意见。提出目前国内批准上市使用的超声对比剂安全性高,建议医护人员根据最新说明书或专家共识进行配药和给药,并从造影室管理、风险预案、人员资质等方面予以规范。 相似文献
7.
目的:通过对某医院2017-2020年医疗不良事件数据分析,结合运用专业人员访谈法,发现存在问题,针对性地提出对策与建议。方法:采用回顾性分析法,对某医院2017 年1月1日—2020年12月31日医疗安全不良事件管理系统收集的1 117例事件进行分析,并对临床科室负责人、医护人员及行政人员12名进行专家访谈。结果:医疗不良事件中Ⅲ、Ⅳ级上报比例高,普外科、骨科、妇科、产科等手术科室上报例数多。医疗不良事件漏报瞒报的主要原因是担心职能部门追责、引发纠纷及影响科室质量考核评分。管理中存在问题主要是上报意识不足、追踪整改不到位。结论:提高医护风险意识,完善闭环管理流程体系,强化院科两级督查,构建和谐安全文化氛围,以提高医疗不良事件上报率。 相似文献
8.
中华医学会放射学分会护理工作组 《介入放射学杂志》2022,31(6):531-537
【摘要】 介入手术后医院感染严重危害人类健康。制定介入手术室医院感染控制和预防临床实践专家共识可更好地规范介入手术过程中相关临床实践标准,降低医院感染发生率。本共识基于 WHO指南制定手册和GRADE证据质量分级系统,形成了介入手术室环境管理、患者管理、工作人员管理、物品管理、职业暴露、培训与质量控制等6个领域54项推荐意见,供相关人员参考。 相似文献
9.
10.
K. Bhatia Group of Obstetric Anaesthetists of Lancashire Greater Manchester Mersey Study Collaborators 《Anaesthesia》2022,77(4):389-397
Since the start of the COVID-19 pandemic, few studies have reported anaesthetic outcomes in parturients with SARS-CoV-2 infection. We reviewed the labour analgesic and anaesthetic interventions utilised in symptomatic and asymptomatic parturients who had a confirmed positive test for SARS-CoV-2 across 10 hospitals in the north-west of England between 1 April 2020 and 31 May 2021. Primary outcomes analysed included the analgesic/anaesthetic technique utilised for labour and caesarean birth. Secondary outcomes included a comparison of maternal characteristics, caesarean birth rate, maternal critical care admission rate along with adverse composite neonatal outcomes. A positive SARS-CoV-2 test was recorded in 836 parturients with 263 (31.4%) reported to have symptoms of COVID-19. Neuraxial labour analgesia was utilised in 104 (20.4%) of the 509 parturients who went on to have a vaginal birth. No differences in epidural analgesia rates were observed between symptomatic and asymptomatic parturients (OR 1.03, 95%CI 0.64–1.67; p = 0.90). The neuraxial anaesthesia rate in 310 parturients who underwent caesarean delivery was 94.2% (95%CI 90.6–96.0%). The rates of general anaesthesia were similar in symptomatic and asymptomatic parturients (6% vs. 5.7%; p = 0.52). Symptomatic parturients were more likely to be multiparous (OR 1.64, 95%CI 1.19–2.22; p = 0.002); of Asian ethnicity (OR 1.54, 1.04–2.28; p = 0.03); to deliver prematurely (OR 2.16, 95%CI 1.47–3.19; p = 0.001); have a higher caesarean birth rate (44.5% vs. 33.7%; OR 1.57, 95%CI 1.16–2.12; p = 0.008); and a higher critical care utilisation rate both pre- (8% vs. 0%, p = 0.001) and post-delivery (11% vs. 3.5%; OR 3.43, 95%CI 1.83–6.52; p = 0.001). Eight neonates tested positive for SARS-CoV-2 while no differences in adverse composite neonatal outcomes were observed between those born to symptomatic and asymptomatic mothers (25.8% vs. 23.8%; OR 1.11, 95%CI 0.78–1.57; p = 0.55). In women with COVID-19, non-neuraxial analgesic regimens were commonly utilised for labour while neuraxial anaesthesia was employed for the majority of caesarean births. Symptomatic women with COVID-19 are at increased risk of significant maternal morbidity including preterm birth, caesarean birth and peripartum critical care admission. 相似文献