全文获取类型
收费全文 | 27311篇 |
免费 | 6585篇 |
国内免费 | 139篇 |
专业分类
耳鼻咽喉 | 739篇 |
儿科学 | 781篇 |
妇产科学 | 832篇 |
基础医学 | 1104篇 |
口腔科学 | 2923篇 |
临床医学 | 4888篇 |
内科学 | 6271篇 |
皮肤病学 | 662篇 |
神经病学 | 2250篇 |
特种医学 | 1134篇 |
外科学 | 4922篇 |
综合类 | 233篇 |
现状与发展 | 12篇 |
一般理论 | 8篇 |
预防医学 | 3375篇 |
眼科学 | 376篇 |
药学 | 659篇 |
中国医学 | 11篇 |
肿瘤学 | 2855篇 |
出版年
2024年 | 138篇 |
2023年 | 1114篇 |
2022年 | 387篇 |
2021年 | 727篇 |
2020年 | 1272篇 |
2019年 | 594篇 |
2018年 | 1421篇 |
2017年 | 1350篇 |
2016年 | 1598篇 |
2015年 | 1665篇 |
2014年 | 2097篇 |
2013年 | 2585篇 |
2012年 | 1043篇 |
2011年 | 991篇 |
2010年 | 1510篇 |
2009年 | 2073篇 |
2008年 | 960篇 |
2007年 | 718篇 |
2006年 | 934篇 |
2005年 | 712篇 |
2004年 | 536篇 |
2003年 | 539篇 |
2002年 | 473篇 |
2001年 | 578篇 |
2000年 | 499篇 |
1999年 | 575篇 |
1998年 | 578篇 |
1997年 | 553篇 |
1996年 | 596篇 |
1995年 | 450篇 |
1994年 | 346篇 |
1993年 | 311篇 |
1992年 | 339篇 |
1991年 | 313篇 |
1990年 | 283篇 |
1989年 | 298篇 |
1988年 | 265篇 |
1987年 | 245篇 |
1986年 | 230篇 |
1985年 | 229篇 |
1984年 | 185篇 |
1983年 | 155篇 |
1982年 | 139篇 |
1981年 | 124篇 |
1979年 | 113篇 |
1978年 | 106篇 |
1977年 | 102篇 |
1976年 | 89篇 |
1974年 | 85篇 |
1973年 | 92篇 |
排序方式: 共有10000条查询结果,搜索用时 265 毫秒
91.
92.
Preoperative superselective arteriolar embolization: a new approach to enhance resectability of spinal tumors 总被引:6,自引:0,他引:6
The extent of surgical resection of spinal tumors is frequently limited by blood loss and technical difficulty associated with the vascularity of the tumors. We report here the use of superselective percutaneous arterial embolization to reduce the rate of blood loss at the time of surgical resection and enhance resectability. The types of tumors treated were metastatic renal carcinoma, metastatic thyroid carcinoma, metastatic melanoma, and giant cell tumor of the sacrum. Two of the patients required repeated embolization and surgery for recurrent symptoms. The estimated blood loss in seven of nine procedures performed on the six patients ranged from 300 to 800 ml, after which no transfusion was required. In two procedures, extensive resection of very large tumors resulted in larger losses of blood, and postoperative transfusion was necessary. No significant complications of embolization or surgery occurred. A key factor in our embolization technique is the use of microfibrillar collagen, which allows occlusion of tumor vessels as small as 20 microns and may prevent reconstitution of the embolized vessels by collateral flow. We conclude that preoperative arterial embolization enhances the resectability of a variety of spinal tumors by reducing intraoperative blood loss. This may provide an additional benefit by reducing the risk related to postoperative transfusion. By permitting a more aggressive surgical approach, the use of preoperative embolization also has the potential to improve outcome in patients with spinal tumors. 相似文献
93.
Shirley L. Jones RNC MS 《Journal of obstetric, gynecologic, and neonatal nursing : JOGNN / NAACOG》1996,25(9):777-783
Advances in human genetics are rapidly changing the scope of information and care that can be provided to health care consumers. By the year 2005 it is expected that the entire human genome will be mapped and all 70,000–100,000 genes will be identified. Currently, there are more than 5,000 known single-gene disorders. With the movement of specialized health services into the primary care setting, nurses increasingly will need to be knowledgeable about genetic disorders, screening/diagnostic tests, and implications for health care. In addition, the management of genetic information raises issues of informed consent, privacy and confidentiality, truth telling and disclosure, and nondiscrimination. 相似文献
94.
95.
Dr Arthur J. L. Schneider MD W. Bosseau Murray MBChB MD Steven C. Mentzer BS Fernando Miranda BS Sorin Vaduva MS 《Journal of clinical monitoring and computing》1995,11(6):358-364
Objective. The medical practitioner is faced with an increasing list of protocols and algorithms related to patient care. These recommendations are often difficult to recall, particularly in stressful emergency situations. Using advanced cardiac life support (ACLS) protocols, we built a computer-based system to exhibit precompiled response plans for medical emergencies. To validate the usefulness of this prompting device, we tested application of two of the nine ACLS algorithms, pulseless ventricular fibrillation/ventricular tachycardia (Vfib/Vtach) and bradycardia, in a simulated operating room (OR) environment.Methods. The system utilized the software authoring system IconAuthor (Aimtec Inc., Nashua, NH) and a touch-screen monitor (DiamondScan, Microtouch, Methuen, MA). Prior to testing our system, all 39 subjects were given time to familiarize themselves with its operation. Subsequently, all subjects were videotaped while managing a standard simulated anesthetic. During the anesthetic, the subjects were presented with two emergency scenarios, not viewed during the familiarization period. The electrocardiographic (EKG) signals for normal sinus rhythm, ventricular fibrillation, and second-degree heart block were presented. By random selection, the prompter was available to half of the subjects for help with arrhythmia management (experimental group), while to half it was not (control group).Results. A total of 39 subjects completed the exercise. Use of the prompter enabled significantly more subjects to administer correct drugs and dosages during ventricular fibrillation. The correct lidocaine dose was chosen more often by the experimental group than by the control (p=0.015); similarly MgSO4 was appropriately ordered more often in the experimental group (p=0.003). During second-degree heart block, atropine was correctly followed with a dopamine infusion (p=0.004), and epinephrine infusion was ordered for refractory bradycardia (p=0.002) more often in the experimental than the control group.Conclusions. These data demonstrate the value of a prompting device at the anesthesia workstation. We foresee the use of such prompters in many areas of medicine.This study was made possible by a grant from the Anesthesia Patient Safety Foundation. Results were presented, in part, at the meeting of the STA/SEA Orlando, Florida, January 1994. 相似文献
96.
Andrew R. Hoellein MD Christopher A. Feddock MD Charles H. Griffith III MD MSPH John F. Wilson PhD Donald R. Barnett MD MSPH Pat F. Bass III MD MS T. Shawn Caudill MD MSPH 《Journal of general internal medicine》2004,19(5P2):562-565
Due to recent public debate and newly imposed resident work hour restrictions, we decided to investigate the relationship of resident call status to their ambulatory patients' satisfaction. Resident continuity clinic patients were asked to rate their level of satisfaction on a 10-point Likert-type scale. Using multiple regression approaches, these data were then assessed as a function of resident call status. We found that in 646 patient encounters, patient satisfaction scores were significantly less when the resident was postcall, 8.99 ± 1.8, than when not postcall, 9.31 ± 1.3. We herein discuss etiologies and implications of these findings for both patient care and medical education. 相似文献
97.
Photopatch testing: a consensus methodology for Europe 总被引:1,自引:0,他引:1
D.P. Bruynzeel J. Ferguson K. Andersen M. Gonçalo John English A. Goossens E. Holzle S.H. Ibbotson M. Lecha P. Lehmann F. Leonard Harry Moseley P. Pigatto A. Tanew 《Journal of the European Academy of Dermatology and Venereology》2004,18(6):679-682
A group of interested European Contact Dermatologists/Photobiologists met to produce a consensus statement on methodology, test materials and interpretation of photopatch testing. While it is recognized that a range of local variables operate throughout Europe, the underlying purpose of the work is to act as an essential preamble to a Pan European Photopatch Test Study focusing particularly on sunscreen chemicals. 相似文献
98.
99.
100.
Kuo-Sheng Hung MD Phd Chung-Ling Liang MD Cheng-Haung Wang MD Hsueh-Wen Chang PhD Naeun Park MS Suh-Hang Hank Juo MD PhD 《Journal of clinical neuroscience》2004,11(8):849-853
Frontal intracerebral haemorrhage (ICH) is a common result of cranial trauma. Outcome differences between bilateral and unilateral frontal ICH are not well studied but would be valuable to predict prognosis in clinical practice. Two aims are proposed in this study: first to compare the risk of developing delayed ICH after bilateral or unilateral frontal ICH, and second to determine the variables helpful to predict outcome according to the Glasgow Outcome Scale (GOS). Between January 1993 and December 1997, 694 consecutive patients with traumatic ICH were admitted to the Chang Gung Medical Center within 24 h of the trauma. Patients with ICH in sites other than the frontal lobes were excluded. A total of 161 cases (mean age 46.3+/-20.3 years), including 57 bilateral (mean age 52.5+/-18.7 years) and 104 unilateral (mean age 42.9+/-20.5 years) traumatic frontal ICH were studied. Twenty-eight of 57 patients (49%) with bifrontal ICH versus 17 of 104 patients (16%) with unilateral frontal ICH had a further, delayed ICH. In 42 of 45 patients (93%) with delayed ICH, this occurred within 5 days of the initial trauma. Multivariate logistic regression was used to select significant predictors of outcome. We found that delayed ICH (p<0.001), age (p=0.004) and mechanism of injury (p=0.001) explained the worse outcome in patients with bifrontal ICH. The best-fitting logistic regression model included three variables: delayed ICH (p=0.011), initial GCS (p=0.023), and a sum score of clinical and radiological variables (p=0.003). Bifrontal ICH tended to occur in older patients after a fall and was associated with a higher risk of developing delayed ICH or brain stem compression compared to unilateral ICH damage. Using these three variables - delayed ICH, initial GCS, and the sum score - in a logistical regression model is useful to predict outcome in patients with traumatic frontal ICH and may aid patient management. 相似文献