全文获取类型
收费全文 | 6448篇 |
免费 | 567篇 |
国内免费 | 46篇 |
专业分类
耳鼻咽喉 | 150篇 |
儿科学 | 197篇 |
妇产科学 | 165篇 |
基础医学 | 783篇 |
口腔科学 | 119篇 |
临床医学 | 805篇 |
内科学 | 1082篇 |
皮肤病学 | 86篇 |
神经病学 | 379篇 |
特种医学 | 575篇 |
外科学 | 927篇 |
综合类 | 315篇 |
一般理论 | 2篇 |
预防医学 | 564篇 |
眼科学 | 130篇 |
药学 | 450篇 |
2篇 | |
中国医学 | 35篇 |
肿瘤学 | 295篇 |
出版年
2023年 | 51篇 |
2022年 | 64篇 |
2021年 | 105篇 |
2020年 | 96篇 |
2019年 | 95篇 |
2018年 | 129篇 |
2017年 | 100篇 |
2016年 | 106篇 |
2015年 | 121篇 |
2014年 | 161篇 |
2013年 | 252篇 |
2012年 | 327篇 |
2011年 | 339篇 |
2010年 | 210篇 |
2009年 | 227篇 |
2008年 | 273篇 |
2007年 | 258篇 |
2006年 | 273篇 |
2005年 | 267篇 |
2004年 | 250篇 |
2003年 | 220篇 |
2002年 | 229篇 |
2001年 | 134篇 |
2000年 | 142篇 |
1999年 | 117篇 |
1998年 | 125篇 |
1997年 | 114篇 |
1996年 | 120篇 |
1995年 | 118篇 |
1994年 | 81篇 |
1993年 | 92篇 |
1992年 | 128篇 |
1991年 | 105篇 |
1990年 | 91篇 |
1989年 | 108篇 |
1988年 | 103篇 |
1987年 | 108篇 |
1986年 | 86篇 |
1985年 | 97篇 |
1984年 | 72篇 |
1983年 | 71篇 |
1982年 | 38篇 |
1980年 | 43篇 |
1978年 | 48篇 |
1977年 | 41篇 |
1976年 | 42篇 |
1974年 | 40篇 |
1973年 | 37篇 |
1955年 | 42篇 |
1954年 | 35篇 |
排序方式: 共有7061条查询结果,搜索用时 406 毫秒
2.
3.
AbstractThis article follows up a pilot project to help educate local nurses and patient educators on freely available consumer health resources. The Outreach Coordinator and Clinical Librarian at an academic medical center created a one-hour in-person and online class with continuing education credit and an online guide. Nurses frequently act as patient educators at the bedside and are therefore an important target for consumer health education. While nurses in an urban setting may have more access to educational opportunities, these opportunities are needed even more in rural settings. Librarians can obtain funding to travel and teach classes at rural community hospitals. 相似文献
4.
Dr. Arni Raghavendrarao Raghuram M.Ch. Subbiah Kumar MD Kathamuthu Balamurugan DA Arulmurugan DA Ramiah Krishnan M.Ch. Perichiappan Sivakami BS Eluvathingal Varghese John M.Ch. 《Indian Journal of Thoracic and Cardiovascular Surgery》2006,22(3):178-181
Background Beating heart surgery has now become the commonest technique of doing Coronary Artery Bypass Graft Surgery (CABG) in our country.
It is being used even in such high risk situations like diffuse coronary disease and Critical Left Main stem Stenosis (LMCS)
with good results. The aim of this study is to retrospectively review our results in Off-Pump Coronary Artery Bypass Surgery
(OPCAB) in patients with critical left main stem stenosis.
Methods This study is a retrospective analysis of the data of patients who underwent primary coronary artery bypass surgery. During
the period from April 2003 to September 2005 a total of 64 patients underwent OPCAB procedure for critical LMCS. During the
same period 10 patients underwent CABG on Cardio Pulmonary Bypass (CPB). The age range was 36–77yrs. The sex distribution
was M: F 53∶10. Ten patients were done as emergency. 2 of them were on Intra Aortic Balloon Pump (IABP) support preoperatively.
10 patients were high risk with a Euro score of ≥5.
Results Left Internal Mammary Artery (LIMA) was used in 78% of cases. Average grafts per patient was 2.96. The median ventilation
time was 5.91 hrs. New IABP insertion in postoperative period was required in 1 patient. One patient was reexplored for bleeding.
There was one perioperative myocardial infarction. 57% of patients did not need any blood transfusion. There was no conversion
to CPB. There was no operative mortality. Inotropes were used in ten cases.
Conclusions OPCAB is a safe method of revascularization in patients with critical LMCS. Preoperative IABP is useful in patients with cardiogenic
shock. However, there is a place for CPB in patients needing additional procedures like Mitral Valve repair (MV repair) or
Dor's procedure or when the vessels are very diffusely diseased. Those patients who are unstable despite IABP support may
be managed by Beating heart On Pump (BHOP) technique. 相似文献
5.
Cough and paradoxical vocal fold motion 总被引:8,自引:0,他引:8
Kenneth W. Altman MD PhD C. Blake Simpson MD Milan R. Amin MD Mona Abaza MD Ron Balkissoon MD Roy R. Casiano MD 《Otolaryngology--head and neck surgery》2002,127(6):501-511
OBJECTIVES: The differential diagnosis and treatment of patients with chronic cough, paradoxical vocal fold motion, and disordered breathing can be a challenge to most practicing otolaryngologists. Tracheobronchial (ie, asthma, bronchitis, and tracheal stenosis), laryngeal (ie, vocal fold paralysis and neoplasms), and rhinologic (ie, allergies and rhinosinusitis) etiologies are commonly diagnosed and treated effectively. However, occasionally one is faced with patients who are refractory to medical treatment and have no obvious rhinologic, laryngeal or pulmonary cause. STUDY DESIGN AND SETTING: We conducted a review of the literature. METHODS: We present a thorough review of the current medical literature exploring the complex neurologic mechanisms involved in the production of cough and the relationship between gastroesophageal reflux disease, vagal neurapathy, and paradoxical vocal fold motion. RESULTS: The diagnosis and successful treatment of chronic cough can be complex. It requires a thorough understanding of the neurologic mechanisms behind cough excitation and suppression. Successful treatment strategies include aggressive management of the patient's reactive airway disease, gastroesophageal reflux disease, and, in select cases, paradoxical vocal fold motion. This may involve a well-coordinated effort among pulmonologists, otolaryngologists, gastroenterologists, and speech pathologists. CONCLUSION: Gastroesophageal reflux disease, vagal neuropathy, and paradoxical vocal fold motion are additional causes of chronic cough and disordered breathing that need to be considered, in the absence of obvious laryngotracheal and/or rhinologic pathology. A high index of suspicion is essential in making the diagnosis and formulating an effective multidisciplinary treatment plan for these patients. 相似文献
6.
7.
8.
The cytoskeleton is susceptible to oxidative stress and this occurs prior to membrane blebbing and cell lysis. Vimentin intermediary filaments in rheumatoid synoviocytes are more susceptible than in normal synoviocytes and this may have pathological significance. They are however no more susceptible to heat shock than other cell types. 相似文献
9.
10.