全文获取类型
收费全文 | 2995篇 |
免费 | 216篇 |
国内免费 | 58篇 |
专业分类
耳鼻咽喉 | 27篇 |
儿科学 | 129篇 |
妇产科学 | 48篇 |
基础医学 | 298篇 |
口腔科学 | 66篇 |
临床医学 | 360篇 |
内科学 | 559篇 |
皮肤病学 | 71篇 |
神经病学 | 121篇 |
特种医学 | 348篇 |
外科学 | 432篇 |
综合类 | 211篇 |
预防医学 | 209篇 |
眼科学 | 38篇 |
药学 | 190篇 |
2篇 | |
中国医学 | 33篇 |
肿瘤学 | 127篇 |
出版年
2022年 | 46篇 |
2021年 | 53篇 |
2020年 | 50篇 |
2019年 | 44篇 |
2018年 | 59篇 |
2017年 | 40篇 |
2016年 | 40篇 |
2015年 | 56篇 |
2014年 | 73篇 |
2013年 | 110篇 |
2012年 | 139篇 |
2011年 | 147篇 |
2010年 | 139篇 |
2009年 | 147篇 |
2008年 | 122篇 |
2007年 | 124篇 |
2006年 | 130篇 |
2005年 | 88篇 |
2004年 | 93篇 |
2003年 | 80篇 |
2002年 | 72篇 |
2001年 | 59篇 |
2000年 | 55篇 |
1999年 | 53篇 |
1998年 | 97篇 |
1997年 | 82篇 |
1996年 | 77篇 |
1995年 | 73篇 |
1994年 | 49篇 |
1993年 | 52篇 |
1992年 | 38篇 |
1991年 | 30篇 |
1990年 | 26篇 |
1989年 | 42篇 |
1988年 | 55篇 |
1987年 | 44篇 |
1986年 | 33篇 |
1985年 | 39篇 |
1984年 | 23篇 |
1983年 | 32篇 |
1982年 | 19篇 |
1978年 | 20篇 |
1977年 | 18篇 |
1976年 | 18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3269条查询结果,搜索用时 0 毫秒
2.
María Cabrerizo Gloria Trallero María José Pena Amaia Cilla Gregoria Megias Carmen Mu?oz-Almagro Eva Del Amo Diana Roda Ana Isabel Mensalvas Antonio Moreno-Docón Juan García-Costa Nuria Rabella Manuel Ome?aca María Pilar Romero Sara Sanbonmatsu-Gámez Mercedes Pérez-Ruiz María José Santos-Mu?oz Cristina Calvo And the study group of “Enterovirus parechovirus infections in children under ?years-old Spain” PI- 《European journal of pediatrics》2015,174(11):1511-1516
3.
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.
6.
7.
8.
M R Avram C Pena D Burrell A Antignani M M Avram 《American journal of kidney diseases》1990,16(4):342-345
A total of 204 patients treated by maintenance hemodialysis or continuous ambulatory peritoneal dialysis (CAPD) were studied to ascertain how advancing age influences adaptation to uremia therapy. No difference in Karnofsky score was noted among patients over 70 years of age and two groups of patients, 16 to 59, and 60 to 69 years of age, respectively. In a subset of 33 hemodialysis patients studied midweek, it was noted that increasing age is associated with a lower serum creatinine concentration, lower interdialytic weight gain, and a lower urea generation rate. These three findings contribute to a relative ease in treating older uremia patients with hemodialysis or CAPD, as they tend to be stable and compliant relative to younger patients. 相似文献
9.
Kim C. Donaghue M.M. Pena A.T.W. Fung M. Bonney N.J. Howard M. Silink J. Schwingshandl 《Diabetic medicine》1995,12(10):868-873
The study aimed to compare the longitudinal assessment of autonomic nerve function by computerized infrared pupillometry and standard cardiovascular tests in adolescents with diabetes. Adolescents (n = 150) were assessed at two time points (T1 and T2). The median time interval between assessments was 1.5 (range 0.9–3) years. At T1 the median age was 14.5 (range 8.3–19.5) years and the median duration was 6.5 (range 1.1–16) years. The pupillary variables assessed included the resting pupil diameter, the maximum constriction velocity, and the reflex amplitude of constriction. Heart rate reflexes were assessed in response to deep breathing, the Valsalva manoeuvre, and on standing from a lying position (30/15 ratio). Between visits there was a significant decrease in maximum constriction velocity (6.0 mm s?1 vs 6.3 mm s?1, p = 0.0001) and resting pupil diameter (6.2 mm vs 6.3 mm, p = 0.001). At reassessment pupillary abnormalities increased from 32 (21 %) to 45 (30%), with 17 (54 %) of the initial abnormalities persisting. Adolescents with abnormally slow maximum constriction velocity compared to those with normal maximum constriction velocity had a higher glycated haemoglobin (HbA1c%) at T2 (p = 0.02) and between assessments (p = 0.01). Cardiovascular test abnormalities did not increase between visits and the persistence of initial abnormalities was low (21 %). In summary, pupillometry appears a more sensitive test of autonomic nerve dysfunction in adolescents with diabetes than assessment of cardiovascular reflexes. 相似文献
10.
Philip Peng FRCPC Manon Choiniere PhD Dominique Dion MD MSc Howard Intrater FRCPC Sandra LeFort PhD Mary Lynch FRCPC May Ong FRCPC Saifee Rashiq MSc DA FRCPC Gregg Tkachuk PhD Yves Veillette FRCPC 《Journal canadien d'anesthésie》2007,54(12):977-984
PURPOSE: The objective of this survey was to examine the services offered by multidisciplinary pain treatment facilities (MPTFs) across Canada and to compare access to care at these MPTFs. METHODS: A MPTF was defined as a clinic that advertised specialized multidisciplinary services for the diagnosis and management of patients with chronic pain, having a minimum of three different health care disciplines (including at least one medical speciality) available and integrated within the facility. The search method included approaching all hospital and rehabilitation centre administrators in Canada, the Insurance Bureau of Canada, the Workplace Safety and Insurance Board or similar body in each province. Designated investigators were responsible for confirming and supplementing MPTFs from the preliminary list for each province. Administrative leads at each eligible MPTF were asked to complete a detailed questionnaire regarding their MPTF infrastructure, clinical, research, teaching and administrative activities. RESULTS: Completed survey forms were received from 102 MPTFs (response rate 85%) with 80% concentrated in major cities, and none in Prince Edward Island and the Territories. The MPTFs offer a wide variety of treatments including non-pharmacological modalities such as interventional, physical and psychological therapy. The median wait time for a first appointment in public MPTFs is six months, which is approximately 12 times longer than non-public MPTFs. Eighteen pain fellowship programs exist in Canadian MPTFs and 64% engage in some form of research activities CONCLUSION: Canadian MPTFs are unable to meet clinical demands of patients suffering from chronic pain, both in terms of regional accessibility and reasonable wait time for patients' first appointment. 相似文献