首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   53064篇
  免费   3681篇
  国内免费   179篇
耳鼻咽喉   601篇
儿科学   1067篇
妇产科学   795篇
基础医学   6786篇
口腔科学   693篇
临床医学   4905篇
内科学   12852篇
皮肤病学   532篇
神经病学   5188篇
特种医学   2107篇
外科学   8476篇
综合类   587篇
一般理论   65篇
预防医学   3657篇
眼科学   926篇
药学   3192篇
中国医学   49篇
肿瘤学   4446篇
  2024年   42篇
  2023年   286篇
  2022年   601篇
  2021年   1434篇
  2020年   900篇
  2019年   1294篇
  2018年   1641篇
  2017年   1119篇
  2016年   1205篇
  2015年   1443篇
  2014年   2164篇
  2013年   2512篇
  2012年   4330篇
  2011年   4295篇
  2010年   2404篇
  2009年   2153篇
  2008年   3761篇
  2007年   3875篇
  2006年   3746篇
  2005年   3688篇
  2004年   3287篇
  2003年   3029篇
  2002年   2741篇
  2001年   323篇
  2000年   226篇
  1999年   332篇
  1998年   489篇
  1997年   440篇
  1996年   357篇
  1995年   326篇
  1994年   251篇
  1993年   236篇
  1992年   143篇
  1991年   127篇
  1990年   113篇
  1989年   96篇
  1988年   87篇
  1987年   68篇
  1986年   75篇
  1985年   100篇
  1984年   121篇
  1983年   105篇
  1982年   136篇
  1981年   109篇
  1980年   95篇
  1979年   42篇
  1978年   60篇
  1977年   57篇
  1976年   49篇
  1975年   40篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.
993.
994.

1 Background and objective

Worldwide adoption of the subcutaneous implantable cardioverter‐defibrillator (S‐ICD) for preventing sudden cardiac death continues to increase, as longer‐term evidence demonstrating the safety and efficacy of the S‐ICD expands. As a relatively new technology, comprehensive anesthesia guidance for the management of patients undergoing S‐ICD placement is lacking. This article presents advantages and disadvantages of different periprocedural sedation and anesthesia options for S‐ICD implants including general anesthesia, monitored anesthesia care, regional anesthesia, and nonanesthesia personnel administered sedation and analgesia.

2 Methods

Guidance, for approaches to anesthesia care during S‐ICD implantation, is presented based upon literature review and consensus of a panel of high‐volume S‐ICD implanters, a regional anesthesiologist, and a cardiothoracic anesthesiologist with significant S‐ICD experience. The panel developed suggested actions for perioperative sedation, anesthesia, surgical practices, and a decision algorithm for S‐ICD implantation.

3 Conclusions

While S‐ICD implantation currently requires higher sedation than transvenous ICD systems, the panel consensus is that general anesthesia is not required or is obligatory for the majority of patients for the experienced S‐ICD implanter. The focus of the implanting physician and the anesthesia services should be to maximize patient comfort and take into consideration patient‐specific comorbidities, with a low threshold to consult the anesthesiology team.  相似文献   
995.

Purpose

Morphine ARER is a novel oral, abuse-deterrent, extended-release (ER) formulation of morphine sulfate with physical and chemical properties that deter misuse and abuse by nonoral routes of administration. Here we evaluate the relative bioavailability of morphine ARER and extended-release morphine.

Methods

This single-dose, 2-treatment, 2-period, 2-sequence, randomized crossover study in healthy adult subjects compared the relative bioavailability of morphine ARER 100 mg to that of ER morphine 100 mg in the fasted condition. At 12 and 1.5 hours before dosing and 12 hours after dosing, all subjects received a 50-mg oral naltrexone tablet to minimize opioid-related side effects. Pharmacokinetic parameters including the AUC0–t, AUC0–∞, and Cmax of morphine and its metabolite morphine-6-glucuronide (M6G) were determined at various times up to 48 hours postdose. The bioequivalence of morphine ARER and ER morphine was determined using an ANOVA of the least-squares mean values of morphine and M6G bioavailability.

Findings

Forty-nine subjects completed the study. Both morphine ARER and ER morphine exhibited peak plasma morphine and M6G concentrations of ~30 ng/mL and ~200 ng/mL, respectively, at 3 hours postdose. The 90% CIs of the ln-transformed values of morphine AUC0–t, AUC0–∞, and Cmax were within the 80% to 125% range for bioequivalence. M6G values also indicated bioequivalence of morphine ARER and ER morphine. The most common adverse events were nausea and somnolence.

Implications

These data show that, in these subjects, morphine ARER was bioequivalent to ER morphine, a treatment for pain with well-established efficacy and safety profiles.  相似文献   
996.
Attention to health care quality and safety has increased dramatically. The internal focus of an organization is not without influence from external policy and research findings. Compared with other specialties, efforts to align and advance rehabilitation research, practice, and policy using electronic health record data are in the early stages. This special communication defines quality, applies the dimensions of quality to rehabilitation, and illustrates the feasibility and utility of electronic health record data for research on rehabilitation care quality and outcomes. Using data generated at the point of care provides the greatest opportunity for improving the quality of health care, producing generalizable evidence to inform policy and practice, and ultimately benefiting the health of the populations served.  相似文献   
997.
998.
999.
1000.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号