全文获取类型
收费全文 | 550篇 |
免费 | 56篇 |
国内免费 | 4篇 |
专业分类
耳鼻咽喉 | 2篇 |
儿科学 | 30篇 |
妇产科学 | 3篇 |
基础医学 | 69篇 |
口腔科学 | 8篇 |
临床医学 | 109篇 |
内科学 | 131篇 |
皮肤病学 | 9篇 |
神经病学 | 21篇 |
特种医学 | 88篇 |
外科学 | 47篇 |
综合类 | 6篇 |
预防医学 | 40篇 |
眼科学 | 4篇 |
药学 | 19篇 |
2篇 | |
肿瘤学 | 22篇 |
出版年
2023年 | 6篇 |
2021年 | 7篇 |
2020年 | 8篇 |
2019年 | 8篇 |
2018年 | 11篇 |
2017年 | 7篇 |
2016年 | 8篇 |
2015年 | 7篇 |
2014年 | 19篇 |
2013年 | 20篇 |
2012年 | 23篇 |
2011年 | 12篇 |
2010年 | 21篇 |
2009年 | 27篇 |
2008年 | 15篇 |
2007年 | 18篇 |
2006年 | 27篇 |
2005年 | 20篇 |
2004年 | 21篇 |
2003年 | 18篇 |
2002年 | 14篇 |
2001年 | 17篇 |
2000年 | 6篇 |
1999年 | 16篇 |
1998年 | 20篇 |
1997年 | 22篇 |
1996年 | 17篇 |
1995年 | 18篇 |
1994年 | 18篇 |
1993年 | 11篇 |
1992年 | 13篇 |
1991年 | 8篇 |
1990年 | 10篇 |
1989年 | 15篇 |
1988年 | 5篇 |
1987年 | 8篇 |
1986年 | 8篇 |
1985年 | 11篇 |
1984年 | 4篇 |
1983年 | 8篇 |
1982年 | 4篇 |
1980年 | 4篇 |
1979年 | 6篇 |
1978年 | 6篇 |
1977年 | 4篇 |
1976年 | 9篇 |
1975年 | 6篇 |
1974年 | 5篇 |
1969年 | 3篇 |
1958年 | 2篇 |
排序方式: 共有610条查询结果,搜索用时 15 毫秒
91.
Jukes P. Namm Mark Siegler Caroline Brander Tae Yeon Kim Christian Lowe Peter Angelos 《World journal of surgery》2014,38(7):1568-1573
As surgery grew to become a respected medical profession in the eighteenth century, medical ethics emerged as a response to the growing need to protect patients and maintain the public’s trust in physicians. The early influences of John Gregory and Thomas Percival were instrumental in the formulation of patient-centered medical ethics. In the late nineteenth century, the modern surgical advances of anesthesia and antisepsis created the need for a discipline of ethics specific to surgery in order to confront new and evolving ethical issues. One of the founding initiatives of the American College of Surgeons in 1913 was to eliminate unethical practices such as fee-splitting and itinerant surgery. As surgery continued to advance in the era of solid organ transplantation and minimally invasive surgery in the latter half of the twentieth century, surgical innovation and conflict of interest have emerged as important ethical issues moving forward into the twenty-first century. Surgical ethics has evolved into a distinct branch of medical ethics, and the core of surgical ethics is the surgeon–patient relationship and the surgeon’s responsibility to advance and protect the well-being of the patient. 相似文献
92.
93.
94.
Deborah M. Stephens Ken Boucher Elizabeth Kander Sameer A. Parikh Erin M. Parry Mazyar Shadman John M. Pagel Jennifer Cooperrider Joanna Rhodes Anthony Mato Allison Winter Brian Hill Sameh Gaballa Alexey Danilov Tycel Phillips Danielle M. Brander Sonali M. Smith Matthew S. Davids Kerry Rogers Martha J. Glenn John C. Byrd 《Haematologica》2021,106(11):2845
Chronic lymphocytic leukemia (CLL) patients who develop Hodgkin lymphoma (HL) have limited survival. No current therapeutic standard of care exists. We conducted a multi-center retrospective study of patients with Hodgkin transformation (HT) of CLL. Clinicobiologic characteristics, treatment type, and survival outcomes were analyzed and compared with historic case series. Ninety-four patients were identified. Median age at HT was 67 years (range, 38-85). Median time from CLL diagnosis to HT was 5.5 years (range, 0-20.2). Prior to HT, patients received a median of two therapies for CLL (range, 0-12). As initial therapy for HT, 61% (n=62) received ABVD-based regimens (adriamycin, bleomycin, vinblastine, and dacarbazine). Seven (7%) patients received hematopoietic cell transplantation (HCT) while in first complete remission (CR1). The median number of treatments for HT per patient was one (range, 0-5) with 59 (61%) patients only receiving one line of therapy. After HT, patients had a median follow-up of 1.6 years (range, 0-15.1). Two-year overall survival (OS) after HT diagnosis was 72% (95% Confidence Interval: 62-83). The patients who received standard ABVD-based therapy had a median OS of 13.2 years. Although limited by small sample size, the patients who underwent HCT for HT in CR1 had a similar 2-year OS (n=7; 67%) compared to patients who did not undergo HCT for HT in CR1 (n=87; 72%; P=0.46). In this multi-center study, HT patients treated with ABVD-based regimens had prolonged survival supporting the use of these regimens as standard of care for these patients. 相似文献
95.
Can Cerebrospinal Fluid Pressure Detect Catheter Complications in Patients Who Experience Loss of Effectiveness With Intrathecal Baclofen Therapy?
下载免费PDF全文
![点击此处可从《Neuromodulation》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Michael Saulino MD PhD Michael Turner MD Keith Miesel BSME/PE Felicia R. Cochran PhD Katherine Stromberg MS Elizabeth Fehrmann MS Mary Markert BS Robert Spencer MS MBA 《Neuromodulation》2017,20(2):187-197
ObjectiveThe catheter status of patients who presented with loss of intrathecal baclofen (ITB) therapy effectiveness was investigated using measurements of cerebrospinal fluid (CSF) pressure transmitted through the catheter fluid path to the pump. The aim of the study was to estimate the appropriate threshold separating catheter complications from “normal” catheter function, and to compare catheter status based on CSF pressure with the clinical diagnosis.MethodsThis was a prospective, masked nonsignificant risk, research study. Patients (N = 47) received ITB for the treatment of severe spasticity and presented with symptoms of catheter malfunction. CSF pressure data were recorded using an external sensor connected to a needle inserted into the catheter access port. An algorithm calculated the energy of the variations in CSF pressure caused by respiration and heartbeat within the intrathecal space. These data were evaluated against a threshold that separated normal from abnormal catheter function. Catheter status based on the algorithm was compared with the clinical diagnosis.ResultsComplete data were available for 37 patients. Mean CSF pressure energy was significantly higher (p = 0.025; student t-test) for patients diagnosed with normal catheter function vs. catheters with complications. The CSF pressure algorithm matched the clinical diagnosis in 16 of 18 patients with catheter complications (sensitivity = 89%), and 13 of 19 patients with normal catheter function (specificity = 68%).ConclusionIn-clinic CSF pressure data acquisition is technically feasible. Overall, catheter status based on the algorithm demonstrated concordance with the clinical diagnosis in 29 of 37 patients (78.4%). 相似文献
96.
97.
Cristy M. Schade MD PhD PE John Sasaki MD David M. Schultz MD Nancy Tamayo DC Gary King PhD Lisa M. Johanek PhD 《Neuromodulation》2010,13(3):210-217
Objectives: Spinal cord stimulation devices control energy by generating either constant voltage (CV) pulses or constant current (CC) pulses. This study aimed to investigate: 1) whether patients feel differences between CV and CC stimulation; 2) if patients prefer CV or CC stimulation. Methods: Fourteen patients blinded to the type of pulse generation received 20 randomized pairs of 15‐sec pulse trains (CC‐CV, CV‐CC, CV‐CV, or CC‐CC). Patients identified whether the pairs were the same or different, and if they preferred the first or second train. Results: There was no difference in charge‐per‐pulse input between CV and CC modes. Patients performed at chance level in identifying identical pairs (55.7 ± 24.1% correct, 10 trials), and slightly better in identifying different pairs (67.1 ± 25.2% correct, 10 trials). No patients correctly identified all pairs. Patients were categorized based on their performance in this task. Only three patients fell into a category where preference could be established with some confidence with respect to the group averages. Two of these patients preferred CV, while one patient preferred CC. Conclusion: The lack of patient ability to discriminate in this preliminary investigation suggests that patient preference for a stimulation type should not be the key determining factor in choosing a spinal cord stimulation system. 相似文献
98.
99.
Sensorimotor cortex localization: comparison of magnetoencephalography, functional MR imaging, and intraoperative cortical mapping 总被引:2,自引:0,他引:2
100.
Richard S. Brief PE Jack W. Blanchard PhD Robert A. Scala PhD Jerome H. Blacker 《Archives of environmental & occupational health》2013,68(5):373-384
Industrial conditions which utilize temperature, pressure, and carbon monoxide in the presence of metal catalysts are conducive to metal carbonyl formation. An evaluation of the thermodynamic equilibrium data associated with metal carbonyls shows a definite relationship between these parameters which allow us to construct nomographs concerning their equilibrium formation. Metal carbonyls represent a distinct medical hazard. Recommendations for safe exposure limits and safety devices for personnel protection are based on the toxicity associated with metal carbonyls. Analytical methods indicate that adequate monitoring of the carbonyls of nickel, cobalt, and iron can be obtained. 相似文献