全文获取类型
收费全文 | 1108篇 |
免费 | 84篇 |
国内免费 | 4篇 |
专业分类
耳鼻咽喉 | 5篇 |
儿科学 | 19篇 |
妇产科学 | 20篇 |
基础医学 | 154篇 |
口腔科学 | 27篇 |
临床医学 | 131篇 |
内科学 | 254篇 |
皮肤病学 | 16篇 |
神经病学 | 91篇 |
特种医学 | 30篇 |
外科学 | 184篇 |
综合类 | 9篇 |
预防医学 | 109篇 |
眼科学 | 37篇 |
药学 | 53篇 |
肿瘤学 | 57篇 |
出版年
2023年 | 6篇 |
2022年 | 12篇 |
2021年 | 17篇 |
2020年 | 13篇 |
2019年 | 16篇 |
2018年 | 22篇 |
2017年 | 14篇 |
2016年 | 12篇 |
2015年 | 21篇 |
2014年 | 22篇 |
2013年 | 37篇 |
2012年 | 53篇 |
2011年 | 62篇 |
2010年 | 32篇 |
2009年 | 20篇 |
2008年 | 47篇 |
2007年 | 59篇 |
2006年 | 63篇 |
2005年 | 56篇 |
2004年 | 45篇 |
2003年 | 41篇 |
2002年 | 48篇 |
2001年 | 32篇 |
2000年 | 41篇 |
1999年 | 31篇 |
1998年 | 22篇 |
1997年 | 14篇 |
1995年 | 9篇 |
1994年 | 9篇 |
1992年 | 7篇 |
1991年 | 9篇 |
1990年 | 21篇 |
1989年 | 16篇 |
1988年 | 17篇 |
1987年 | 14篇 |
1986年 | 15篇 |
1985年 | 8篇 |
1984年 | 11篇 |
1983年 | 11篇 |
1982年 | 14篇 |
1981年 | 12篇 |
1980年 | 11篇 |
1979年 | 10篇 |
1977年 | 6篇 |
1976年 | 6篇 |
1974年 | 9篇 |
1973年 | 11篇 |
1972年 | 6篇 |
1971年 | 6篇 |
1969年 | 7篇 |
排序方式: 共有1196条查询结果,搜索用时 0 毫秒
101.
Hannan EL Racz M Walford G Clark LT Holmes DR King SB Sharma S 《The American journal of cardiology》2007,100(8):1192-1198
Numerous disparities in access to health care by race and gender have been identified in the literature. This study examines differences in the use of drug-eluting stents (DES) versus bare-metal stents (BMS) by race, payer, and income level. Data from New York State's Percutaneous Coronary Intervention Reporting System from July 2003 to December 2004 were used to examine use of DES (20,165 patients) relative to BMS (4,547 patients) by race, payer, and annual income level, controlling for a variety of patient and hospital characteristics. African-Americans were found to be less likely to receive DES than other races between July 2003 and March 2004 (adjusted odds ratio [OR] 0.56, 95% confidence interval [CI] 0.50 to 0.65) and between April 2004 and December 2004 (adjusted OR 0.74, 95% CI 0.61 to 0.90). These disparities were reduced (respective adjusted ORs 0.67, 95% CI 0.58 to 0.77 and 0.81, 95% CI 0.66 to 0.91) when controlling for admitting hospital and hospital volume, but were still significant. Medicaid/self-pay patients, and patients living in zip codes with median annual incomes between $20,000 and $30,000 were also less likely to receive DES in the first time period (adjusted respective ORs 0.80, 95% CI 0.68 to 0.93) and 0.85, 95% CI 0.75 to 0.96). In conclusion, African-Americans and low income groups receive DES less frequently than their counterparts compared with BMS. This is related to the hospitals where they are admitted, but not entirely. 相似文献
102.
Gilbert N Luther YC Miera O Nagdyman N Ewert P Berger F Lange PE Schulze-Neick I 《Zeitschrift für Kardiologie》2005,94(9):570-574
INTRODUCTION: Bosentan, a dual endothelin-receptor antagonist, has been shown to be an effective treatment option in patients with the idiopathic form of pulmonary arterial hypertension (PAH). We used bosentan as compassionate treatment in infants and young children with congenital heart disease (CHD) who had a) PAH preoperatively representing a contraindication to corrective surgery or b) persisting PAH after corrective surgery causing right heart failure and reduced exercise tolerance. METHODS: Seven children with PAH due to CHD (median age 3.8 years; range 1.5 to 6.4 years) received 3 mg/kg/d bosentan (Tracleer) orally. Clinical, echocardiographic and hemodynamic parameters were measured and laboratory tests performed before treatment and during steady state while on treatment. Routine liver function parameters were monitored monthly. RESULTS: Mean bosentan treatment time was 8.6+/-5 months. During bosentan therapy there were no significant adverse events. The clinical status remained stable or improved in all patients: NYHA class decreased from 2.6+/-0.6 to 1.7+/-0.6 (p<0.05). This was associated with a mean reduction of the right ventricular systolic pressure (RVSP) from 96+/-11 mmHg to 71+/-26 mmHg (p<0.05). CONCLUSIONS: Treatment with bosentan in infants and young children with PAH due to congenital heart disease was tolerated without significant side effects and resulted in stabilization of clinical status. A significant reduction in right ventricular systolic pressure (RVSP) could be demonstrated. These results suggest that the dose regimen used is appropriate and safe for the treatment of infants and children with PAH, resulting in a reduction of pathologically increased pulmonary vascular resistance. 相似文献
103.
Antibiotics are associated with lower relapse rates in outpatients with acute exacerbations of COPD 总被引:8,自引:0,他引:8
BACKGROUND: COPD is a complex disease with exacerbations characterized by worsening of symptoms resulting in deteriorating lung function. STUDY OBJECTIVE: To assess predictive factors of relapse for patients with acute exacerbations of COPD (AECB). DESIGN: Retrospective cohort analysis of visits for AECB. SETTING: Veterans Affairs Medical Center. PATIENTS: Three hundred sixty-two visits (173 patients) with documented COPD treated as outpatients for AECB. MEASUREMENTS: Severity of underlying COPD, severity of AECB, comorbid conditions, therapy, and relapse rates (return visit within 14 days with persistent or worsening symptoms). RESULTS: Each visit was analyzed individually (referred to as a patient-visit). One group received antibiotics (270 patient-visits), and the second group (92 patient-visits) did not. Both groups had similar demographics and severity of underlying COPD. The overall relapse rate was 22%. The majority of patient-visits (95%) with severe symptoms at presentation were prescribed antibiotics vs only 40% of those with mild symptoms. Twenty-nine of 92 patient-visits (32%) were followed by relapse in the group that was not given antibiotics, whereas only 50 of 270 (19%) treated with antibiotics relapsed (p < 0.001). Those treated with amoxicillin had an even higher relapse rate (20 of 37 patient-visits, or 54%) than those who did not receive antibiotics (p = 0.006). CONCLUSIONS: Relapse from AECB was not related to the severity of underlying disease or to the severity of the acute exacerbation. Patients treated with antibiotics had significantly lower relapse rates than those who did not receive antibiotics. However, the specific choice of antibiotic is important because those treated with amoxicillin had the highest relapse rates of all groups. 相似文献
104.
Powell-Cope GM Luther S Neugaard B Vara J Nelson A 《Journal of evaluation in clinical practice》2004,10(2):227-239
RATIONALE, AIMS AND OBJECTIVES: Clinical practice guidelines have become a standard way of implementing evidence-based practice, yet research has shown that clinicians do not always follow guidelines. METHOD: As part of a larger study to test the effects of an intervention on provider adherence to ischaemic heart disease (IHD) guidelines, we conducted five focus groups at three Veterans Administration Medical Centers with 32 primary care providers, cardiologists, and internists to identify key barriers and facilitators to adherence of the guidelines. Using content analysis, responses were grouped into categories. RESULTS: The main perceived advantages of using the IHD guidelines were improvements in quality and the cost of care. Perceived barriers were the lack of ability of guidelines to manage the care of any one individual patient, the difficulty of accessing guidelines, and high workloads with many complex patients. While providers agreed on the benefits of aspirin, beta-blockers and angiotensin converting enzyme inhibitors, barriers for use of these medications were lack of consensus about contraindications, difficulty in providing follow-up during medication titration, and lack of patient adherence. Sources of influence for guideline use were: professional cardiology organizations, colleagues, mainly cardiologists, and key cardiology journals. However, most providers acknowledged that following guidelines was a personal practice decision. CONCLUSIONS: While results validated the influences of using clinical practice guidelines, our results highlight the importance of ascertaining guideline-specific barriers for building effective interventions to improve provider adherence. An advisory panel reviewed results and, using a modified nominal group process, chose implementation strategies targeting key barriers. 相似文献
105.
Nickolas Speeney Kirstyn Marie Kameg Thomas Cline Janene Luther Szpak Brea Bagwell 《Archives of Psychiatric Nursing》2018,32(6):845-849
Background
Undergraduate nursing students may not have the opportunity to assess and intervene with a patient diagnosed with schizophrenia during their clinical rotation. Provision of a standardized patient simulation experience affords students this opportunity in a safe setting without risk to the patient or student.Methods
A quasi-experimental design was utilized to explore the impact of the addition of a standardized patient simulation scenario depicting a patient with a diagnosis of schizophrenia on undergraduate nursing student knowledge and perceived competency.Results
The mean values for perceived competence and knowledge increased significantly over the three time periods (p?<?0.001).Conclusion
The results suggest that incorporating SP simulation into the undergraduate psychiatric mental health nursing course has the potential to enhance both knowledge and perceived competency of students in caring for patients diagnosed with schizophrenia and ultimately promote better healthcare outcomes. 相似文献106.
The purpose of this essay is to overview our findings that membrane-associated calcium-independent phospholipase A2 is markedly inhibited by low, clinically relevant concentrations of anthracyclines. Our studies suggest that due to the essential
role of this enzyme in membrane homeostasis, its inhibition can be one of the early culprits leading to anthracycline-induced
cardiac dysfunction. The clinical importance and potential pharmaceutical use of this new phenomenon await further studies. 相似文献
107.
May PA Fiorentino D Phillip Gossage J Kalberg WO Eugene Hoyme H Robinson LK Coriale G Jones KL del Campo M Tarani L Romeo M Kodituwakku PW Deiana L Buckley D Ceccanti M 《Alcoholism, clinical and experimental research》2006,30(9):1562-1575
BACKGROUND: Accurate estimates of the prevalence and characteristics of fetal alcohol syndrome (FAS) and fetal alcohol spectrum disorders (FASD) in a Western European population are lacking and are of particular interest in settings where the usual pattern of alcohol consumption is thought to be daily drinking with meals. To address these issues, an epidemiology study of FAS and other FASD was undertaken in Italian schools. METHODS: Primary schools (n = 25) in 2 health districts of the Lazio region were randomly selected and recruited for the study. Five hundred forty-three children, 50% of those enrolled in first-grade classes, received parental permission to participate in a 2-tiered, active case ascertainment screening process. Detailed evaluation of children selected in a preliminary screening phase was carried out on those who were small for height, weight, and head circumference and/or referred by teachers for suspected learning and behavioral problems. Detailed evaluation was carried out on each child's: (1) physical growth and dysmorphology, (2) psychological development and behavior, and (3) prenatal exposure to alcohol and other risk factors for FASD via maternal interviews. A group of 67 randomly selected children without FASD from the same classes was utilized as a comparison group. RESULTS: Using 2 denominators for prevalence estimation, a conservative one and a strict sample-based estimate, the prevalence of FAS in this province of Italy was 3.7 to 7.4 per 1,000 children. When cases of partial FAS (PFAS) and a case of alcohol-related neurodevelopmental deficits (ARND) were added to FAS cases, the rate of FASD was 20.3 to 40.5 per 1,000 and estimated at 35 per 1,000 overall or between 2.3 and 4.1% of all children. This exceeds previously published estimates of both FAS and FASD for the western world. Detailed data are presented that demonstrate the utility of the guidelines of the revised Institute of Medicine diagnostic criteria for FASD. Children with FASD are significantly more impaired/affected (p < 0.05) than randomly selected comparison children on all measures of growth deficiency, key facial features of FASD, overall dysmorphology scores, language comprehension, nonverbal IQ, and behavior. Maternal reports of current drinking were significantly higher for mothers of FASD children than comparison mothers, but reported rates of overall drinking during pregnancy were not significantly different. In contrast to expectations, daily drinking among mothers of the comparison group was not common. However, dysmorphology scores of the children were significantly correlated with drinking in the second and third trimesters, drinks per current drinking day, and current drinks per month. Finally, children with the physical features of FASD had lower IQs; nonverbal IQ was significantly correlated with head circumference and negatively correlated with overall dysmorphology score, smooth philtrum, and several other facial and physical anomalies characteristic of FAS. CONCLUSIONS: Using careful measures of ascertainment in a primary school setting, these results provide relatively high estimates of the prevalence of FASD and raise the question of whether FASD is more common in the western world than previously estimated. 相似文献
108.
Ferdinand KC Clark LT Watson KE Neal RC Brown CD Kong BW Barnes BO Cox WR Zieve FJ Isaacsohn J Ycas J Sager PT Gold A;ARIES Study Group 《The American journal of cardiology》2006,97(2):229-235
The lipid-modifying effects of statin therapy in hypercholesterolemic African-Americans have not been well characterized. This study compared the efficacy and safety of rosuvastatin and atorvastatin treatment for 6 weeks in hypercholesterolemic African-American adults. In the African American Rosuvastatin Investigation of Efficacy and Safety (ARIES) trial (4522US/0002), 774 adult African-Americans with low-density lipoprotein cholesterol > or = 160 and < or = 300 mg/dl and triglycerides < 400 mg/dl were randomized to receive open-label rosuvastatin 10 or 20 mg or atorvastatin 10 or 20 mg for 6 weeks. At week 6, significantly greater reductions in low-density lipoprotein cholesterol, total cholesterol, non-high-density lipoprotein cholesterol, and apolipoprotein B concentrations, as well as lipoprotein and apolipoprotein ratios, were seen with rosuvastatin versus milligram-equivalent atorvastatin doses (analysis of variance with Bonferroni-adjusted critical p < 0.017 for all comparisons). Rosuvastatin 10 mg also increased high-density lipoprotein cholesterol significantly more than atorvastatin 20 mg (p < 0.017). Although statistical comparisons were not performed, larger proportions of rosuvastatin-treated patients than atorvastatin-treated patients achieved National Cholesterol Education Program Adult Treatment Panel III low-density lipoprotein cholesterol goals. The median high-sensitivity C-reactive protein levels were significantly reduced statistically from baseline with rosuvastatin 20 mg and atorvastatin 20 mg among all patients and with rosuvastatin 10 and 20 mg and atorvastatin 20 mg in those patients with a baseline C-reactive protein level > 2.0 mg/L. The 2 study medications were well tolerated during the 6-week study period. In conclusion, rosuvastatin 10 and 20 mg improved the overall lipid profile of hypercholesterolemic African-Americans better than did milligram-equivalent doses of atorvastatin. 相似文献
109.
Pediatric Obsessive‐Compulsive Disorder: An Update for Advanced Practice Psychiatric Nurses 下载免费PDF全文
Kirstyn Marie Kameg DNP PMHNP‐BC Luann Richardson PhD PMHNP‐BC FNP‐BC Janene Luther Szpak DNP PMHNP‐BC 《Journal of child and adolescent psychiatric nursing》2015,28(2):84-91
Obsessive‐compulsive disorder (OCD) may have an onset in childhood or adolescence resulting in significant functional impairment and disability into adulthood. There are frequently developmental differences in the content of the obsessions and compulsions in youth compared to adults. Lack of insight or shame may result in failure of the youth to seek treatment. This delay in treatment may lead to the development of other psychiatric comorbidities, including suicide. Evidence‐based treatments for OCD include cognitive behavioral therapy and exposure/response prevention, and in moderate to severe cases, use of selective serotonin reuptake inhibitors is indicated. Advanced practice psychiatric nurses are in a unique position to provide psychoeducation, psychotherapy, and medications, if indicated, to youth with this condition to improve functioning and reduce morbidity and mortality. This article will provide an overview of the diagnostic criteria for OCD, etiologies, assessment strategies, differential diagnoses, common comorbidities, and evidence‐based treatment options. 相似文献
110.
One of the ways boards of nursing serve to protect the public health, safety, and welfare is by removing from practice those nurses who fail to meet recognized standards of care or otherwise pose a public threat. Self-reporting and discovery through criminal background checks and reports from the court system or other regulatory bodies represent only small numbers of those disciplined. Most complaints investigated by a board are reported by nursing administrators, either chief nursing officers or nurse managers. Frequently, the reporting nurses provide the board with information from their own investigation that identifies the problem and the cause and includes supporting evidence. Based on their own independent investigation, the reporting nurses often assume that the outcome of board action is a foregone conclusion. Without understanding all of the ramifications of disciplinary processes and the requirements to protect the rights of the nurse that are guaranteed under the US Constitution, the final outcome decision can be totally different than anticipated and thus disappointing to the reporting nurse administrator. They could perceive the decision as wrong, nonsupportive, and discounting the efforts made by the reporting nurse. This unhappiness with the outcome causes vulnerability in the major reporting source to a board, namely, the relationship between the board and the nurse administrator. An initial step in mitigating this vulnerability is a better understanding by nursing administrators of the legal procedures that guide disciplinary processes and boards providing timely feedback to reporting nurses on the disposition of cases. 相似文献