全文获取类型
收费全文 | 2804757篇 |
免费 | 201877篇 |
国内免费 | 11474篇 |
专业分类
耳鼻咽喉 | 37873篇 |
儿科学 | 90015篇 |
妇产科学 | 77712篇 |
基础医学 | 393548篇 |
口腔科学 | 77196篇 |
临床医学 | 252655篇 |
内科学 | 553881篇 |
皮肤病学 | 67489篇 |
神经病学 | 228603篇 |
特种医学 | 108087篇 |
外国民族医学 | 812篇 |
外科学 | 422108篇 |
综合类 | 61472篇 |
一般理论 | 1020篇 |
预防医学 | 205547篇 |
眼科学 | 63297篇 |
药学 | 208030篇 |
27篇 | |
中国医学 | 8161篇 |
肿瘤学 | 160575篇 |
出版年
2019年 | 22654篇 |
2018年 | 32199篇 |
2017年 | 25131篇 |
2016年 | 28634篇 |
2015年 | 32722篇 |
2014年 | 45255篇 |
2013年 | 65931篇 |
2012年 | 87878篇 |
2011年 | 92551篇 |
2010年 | 55889篇 |
2009年 | 53456篇 |
2008年 | 85745篇 |
2007年 | 91220篇 |
2006年 | 92573篇 |
2005年 | 88476篇 |
2004年 | 84545篇 |
2003年 | 81519篇 |
2002年 | 78523篇 |
2001年 | 142970篇 |
2000年 | 146046篇 |
1999年 | 122652篇 |
1998年 | 33166篇 |
1997年 | 29063篇 |
1996年 | 28706篇 |
1995年 | 29408篇 |
1994年 | 26897篇 |
1993年 | 24972篇 |
1992年 | 93850篇 |
1991年 | 89815篇 |
1990年 | 86610篇 |
1989年 | 83778篇 |
1988年 | 76630篇 |
1987年 | 74835篇 |
1986年 | 69930篇 |
1985年 | 66443篇 |
1984年 | 48968篇 |
1983年 | 41294篇 |
1982年 | 24041篇 |
1981年 | 21320篇 |
1979年 | 42386篇 |
1978年 | 29494篇 |
1977年 | 25099篇 |
1976年 | 22882篇 |
1975年 | 24522篇 |
1974年 | 28780篇 |
1973年 | 27276篇 |
1972年 | 25678篇 |
1971年 | 23892篇 |
1970年 | 21965篇 |
1969年 | 21182篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
目的探析中高频听力下降型突发性聋采取耳后注射甲强龙治疗的临床效果及可行性。方法选取2019年5月~2020年7月本院耳鼻喉科就诊的中高频听力下降型突发性聋患者,共纳入病例54例,以随机法分组,即常规组(n=27)和观察组(n=27),常规组予常规治疗,观察组采取耳后注射甲强龙,比较两组效果。结果观察组有效率相比于常规组显著提高(P<0.05);治疗3周后,观察组2000~8000Hz频率听力提高值与常规组比(P<0.05)。结论中高频听力下降型突发性聋采取耳后注射甲强龙治疗效果理想,值得推广。 相似文献
2.
3.
S. Liu A. E. Patanwala J. M. Naylor N. Levy R. Knaggs J. A. Stevens B. Bugeja D. Begley K. E. Khor E. Lau R. Allen S. Adie J. Penm 《Anaesthesia》2023,78(10):1237-1248
Modified-release opioids are often prescribed for the management of moderate to severe acute pain following total hip and knee arthroplasty, despite recommendations against their use due to increasing concerns regarding harm. The primary objective of this multicentre study was to examine the impact of modified-release opioid use on the incidence of opioid-related adverse events compared with immediate-release opioid use, among adult inpatients following total hip or knee arthroplasty. Data for total hip and knee arthroplasty inpatients receiving an opioid analgesic for postoperative analgesia during hospitalisation were collected from electronic medical records of three tertiary metropolitan hospitals in Australia. The primary outcome was the incidence of opioid-related adverse events during hospital admission. Patients who received modified with or without immediate-release opioids were matched to those receiving immediate-release opioids only (1:1) using nearest neighbour propensity score matching with patient and clinical characteristics as covariates. This included total opioid dose received. In the matched cohorts, patients given modified-release opioids (n = 347) experienced a higher incidence of opioid-related adverse events overall, compared with those given immediate-release opioids only (20.5%, 71/347 vs. 12.7%, 44/347; difference in proportions 7.8% [95%CI 2.3–13.3%]). Modified-release opioid use was associated with an increased risk of harm when used for acute pain during hospitalisation after total hip or knee arthroplasty. 相似文献
4.
Post-induction hypotension is common and associated with postoperative complications. We hypothesised that pneumatic leg compression reduces post-induction hypotension in elderly patients undergoing robot-assisted laparoscopic prostatectomy. In this double-blind randomised study, patients were allocated randomly to the pneumatic leg compression group (n = 50) or control (n = 50). In the intervention group, pneumatic leg compression was initiated before induction of anaesthesia. In the control group, pneumatic leg compression was initiated 20 min after anaesthesia induction. The primary outcome was the incidence of post-induction hypotension in these groups. Post-induction hypotension was defined as systolic blood pressure < 90 mmHg during the first 20 min after induction. Haemodynamic variables and area under the curve of post-induction systolic blood pressure over time were assessed. Complications associated with pneumatic leg compression were recorded, including: peripheral neuropathy; compartment syndrome; extensive bullae beneath the leg sleeves; and pulmonary thromboembolism. The incidence of post-induction hypotension decreased in the pneumatic leg compression group compared with that in the control group; 5 (10%) vs. 29 (58%), respectively, p < 0.001. In the pneumatic leg compression group, the lowest systolic, diastolic and mean blood pressures 20 min after induction of anaesthesia were significantly greater than the control group. Pneumatic leg compression resulted in an increased area under the curve of systolic blood pressure in the first 20 min after induction, p = 0.001. There were no pneumatic leg compression-related complications. Pneumatic leg compression reduced post-induction hypotension in elderly patients undergoing robot-assisted laparoscopic prostatectomy, suggesting that it is an effective and safe intervention to prevent post-induction hypotension among elderly patients undergoing general anaesthesia. 相似文献
5.
6.
Wu Dan Chen Mengya Chen Shile Zhang Shimin Chen Yongheng Zhao Qian Xue Ke Xue Feng Chen Xiaosong Zhou Min Li Hao Zheng Jie Le Yunchen Cao Hua 《Clinical rheumatology》2022,41(10):3107-3117
Clinical Rheumatology - Extrahepatic tryptophan (Trp)-kynurenine (Kyn) metabolism via indoleamine 2,3-dioxygenase 1 (IDO1) induction was found to be associated with intrinsic immune regulation.... 相似文献
7.
目的探讨核心肌群稳定性训练联合生物反馈在早期宫颈癌根治术后患者盆底康复中的应用效果。方法采用便利抽样法,于2018年8月—2021年7月选取在南京大学医学院附属鼓楼医院接受妇科手术治疗的宫颈癌患者130例为研究对象。按照随机数字表法将患者分为试验组和对照组,各65例。对照组采用常规康复护理措施,试验组采取核心肌群稳定性训练联合生物反馈的康复护理措施,比较两组患者盆底电生理功能、盆底功能障碍患者生活质量量表(PFDI-20)、盆底功能障碍问卷(PFIQ-7)评分。结果干预后试验组患者各项盆底肌电值均高于对照组,Ⅰ、Ⅱ类肌纤维疲劳值均低于对照组,差异有统计学意义(P<0.01)。干预后试验组患者PFDI-20、PFIQ-7评分均低于对照组,差异有统计学意义(P<0.01)。结论采取核心肌群稳定性训练联合生物反馈对早期宫颈癌根治术后盆底康复的疗效较好,值得临床推广使用。 相似文献
8.
Manoj A Vyawahare Sushant Gulghane Rajkumar Titarmare Tushar Bawankar Prashant Mudaliar Rahul Naikwade Jayesh M Timane 《World journal of gastrointestinal surgery》2022,14(8):731-742
Approximately 10%-20% of the cases of acute pancreatitis have acute necrotizing pancreatitis. The infection of pancreatic necrosis is typically associated with a prolonged course and poor prognosis. The multidisciplinary, minimally invasive “step-up” approach is the cornerstone of the management of infected pancreatic necrosis (IPN). Endosonography-guided transmural drainage and debridement is the preferred and minimally invasive technique for those with IPN. However, it is technically not feasible in patients with early pancreatic/peripancreatic fluid collections (PFC) (< 2-4 wk) where the wall has not formed; in PFC in paracolic gutters/pelvis; or in walled off pancreatic necrosis (WOPN) distant from the stomach/duodenum. Percutaneous drainage of these infected PFC or WOPN provides rapid infection control and patient stabilization. In a subset of patients where sepsis persists and necrosectomy is needed, the sinus drain tract between WOPN and skin-established after percutaneous drainage or surgical necro sectomy drain, can be used for percutaneous direct endoscopic necrosectomy (PDEN). There have been technical advances in PDEN over the last two decades. An esophageal fully covered self-expandable metal stent, like the lumen-apposing metal stent used in transmural direct endoscopic necrosectomy, keeps the drainage tract patent and allows easy and multiple passes of the flexible endoscope while performing PDEN. There are several advantages to the PDEN procedure. In expert hands, PDEN appears to be an effective, safe, and minimally invasive adjunct to the management of IPN and may particularly be considered when a conventional drain is in situ by virtue of previous percutaneous or surgical intervention. In this current review, we summarize the indications, techniques, advantages, and disadvantages of PDEN. In addition, we describe two cases of PDEN in distinct clinical situations, followed by a review of the most recent literature. 相似文献
9.
10.
The coronavirus disease 2019 (COVID-19) pandemic is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Hepatic involvement is common in SARS-CoV-2-infected individuals. It is currently accepted that the direct and indirect hepatic effects of SARS-CoV-2 infection play a significant role in COVID-19. In individuals with pre-existing infectious and non-infectious liver disease, who are at a remarkably higher risk of developing severe COVID-19 and death, this pathology is most medically relevant. This review emphasizes the current pathways regarded as contributing to the gastrointestinal and hepatic ailments linked to COVID-19-infected patients due to an imbalanced interaction among the liver, systemic inflammation, disrupted coagulation, and the lung. 相似文献