全文获取类型
收费全文 | 6941篇 |
免费 | 425篇 |
国内免费 | 58篇 |
专业分类
耳鼻咽喉 | 45篇 |
儿科学 | 238篇 |
妇产科学 | 281篇 |
基础医学 | 719篇 |
口腔科学 | 257篇 |
临床医学 | 562篇 |
内科学 | 1345篇 |
皮肤病学 | 124篇 |
神经病学 | 280篇 |
特种医学 | 432篇 |
外科学 | 959篇 |
综合类 | 343篇 |
一般理论 | 4篇 |
预防医学 | 344篇 |
眼科学 | 469篇 |
药学 | 638篇 |
2篇 | |
中国医学 | 63篇 |
肿瘤学 | 319篇 |
出版年
2023年 | 32篇 |
2022年 | 122篇 |
2021年 | 245篇 |
2020年 | 111篇 |
2019年 | 120篇 |
2018年 | 200篇 |
2017年 | 153篇 |
2016年 | 198篇 |
2015年 | 203篇 |
2014年 | 276篇 |
2013年 | 333篇 |
2012年 | 552篇 |
2011年 | 461篇 |
2010年 | 337篇 |
2009年 | 280篇 |
2008年 | 369篇 |
2007年 | 378篇 |
2006年 | 380篇 |
2005年 | 301篇 |
2004年 | 257篇 |
2003年 | 232篇 |
2002年 | 196篇 |
2001年 | 92篇 |
2000年 | 100篇 |
1999年 | 85篇 |
1998年 | 119篇 |
1997年 | 105篇 |
1996年 | 95篇 |
1995年 | 88篇 |
1994年 | 52篇 |
1993年 | 76篇 |
1992年 | 37篇 |
1991年 | 45篇 |
1990年 | 40篇 |
1989年 | 59篇 |
1988年 | 66篇 |
1987年 | 53篇 |
1986年 | 48篇 |
1985年 | 43篇 |
1984年 | 33篇 |
1983年 | 30篇 |
1982年 | 19篇 |
1978年 | 19篇 |
1977年 | 24篇 |
1959年 | 22篇 |
1958年 | 29篇 |
1957年 | 19篇 |
1956年 | 30篇 |
1955年 | 42篇 |
1954年 | 35篇 |
排序方式: 共有7424条查询结果,搜索用时 31 毫秒
2.
Pradeep Balasubramanian M.D. C. R. Srinivas M.D. Pavai Arunachalam M.S. M.Ch. K. S. Thirumurthy M.S. M.Ch. P. R. Rajkumar M.S. M.Ch. H. Manuvidhya M.B.B.S. 《Pediatric dermatology》2015,32(3):e78-e81
We report on a child with several café au lait spots in association with a lumbar lipomeningomyelocele as an apparently new association. Cutaneous markers, the identification of which plays a crucial role in the early diagnosis and management of spinal malformations, can accompany occult spinal dysraphism. Herein we report a case of lumbar lipomeningomyelocele associated with an overlying café au lait spot that served as a marker of occult spinal dysraphism. The patient also had segmental café au lait spots on the face, making the association unique. 相似文献
3.
4.
5.
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
6.
7.
8.
9.
Anil K Jain Ravindra S Chauhan Ish K Dhammi Aditya V Maheshwari Ruma Ray 《The spine journal》2007,7(2):249-253
BACKGROUND CONTEXT: Pseudoaneurysm of the aorta in association with vertebral tuberculosis is a rare phenomenon. With the resurgence of human immunodeficiency virus (HIV) and associated resistant tuberculosis, this life-threatening complication requires greater awareness. PURPOSE: Our purpose is to report the rare presentation and successful management of tubercular pseudoaneurysm of the aorta in association with vertebral tuberculosis, and to highlight the clinicoradiological features for early and prompt diagnosis of this potentially fatal, but treatable, disease. STUDY DESIGN: A single case report and overview of the disease comprises the design of this study. PATIENT SAMPLE: The patient, already surgically intervened, is a 27-year-old male with increasing abdominal and back pain, upper motor neuron signs, and constitutional signs and symptoms. OUTCOME MEASURES: At 33 months follow-up, there is complete resolution of the signs and symptoms, and the patient is back to his previous vocation. METHODS: The diagnosis was confirmed by magnetic resonance imaging and contrast computed tomography. Endoaneurysmorrhaphy of the pseudoaneurysm along with a complete course of antitubercular treatment was given to the patient, and he has presently been followed up for 33 months. RESULTS: The patient's signs and symptoms have been completely resolved without any recurrence. CONCLUSION: Despite the use of modern chemotherapy and imaging techniques, this disastrous complication still occurs and reinforces the need for early suspicion, diagnosis, surgical resection, and antitubercular therapy along with close postoperative follow-up to prevent recurrence. With the resurgence of HIV (and other immunocompromised states) associated and resistant tuberculosis, we should be more alert than ever to this life-threatening complication. 相似文献
10.