全文获取类型
收费全文 | 7824篇 |
免费 | 1282篇 |
国内免费 | 29篇 |
专业分类
耳鼻咽喉 | 204篇 |
儿科学 | 234篇 |
妇产科学 | 206篇 |
基础医学 | 548篇 |
口腔科学 | 192篇 |
临床医学 | 1743篇 |
内科学 | 1591篇 |
皮肤病学 | 171篇 |
神经病学 | 551篇 |
特种医学 | 265篇 |
外科学 | 1174篇 |
综合类 | 46篇 |
现状与发展 | 1篇 |
一般理论 | 5篇 |
预防医学 | 996篇 |
眼科学 | 90篇 |
药学 | 310篇 |
中国医学 | 5篇 |
肿瘤学 | 803篇 |
出版年
2024年 | 49篇 |
2023年 | 272篇 |
2022年 | 96篇 |
2021年 | 250篇 |
2020年 | 316篇 |
2019年 | 172篇 |
2018年 | 358篇 |
2017年 | 331篇 |
2016年 | 359篇 |
2015年 | 356篇 |
2014年 | 511篇 |
2013年 | 598篇 |
2012年 | 459篇 |
2011年 | 478篇 |
2010年 | 380篇 |
2009年 | 479篇 |
2008年 | 415篇 |
2007年 | 401篇 |
2006年 | 390篇 |
2005年 | 349篇 |
2004年 | 330篇 |
2003年 | 294篇 |
2002年 | 244篇 |
2001年 | 105篇 |
2000年 | 99篇 |
1999年 | 95篇 |
1998年 | 89篇 |
1997年 | 80篇 |
1996年 | 62篇 |
1995年 | 51篇 |
1994年 | 36篇 |
1993年 | 19篇 |
1992年 | 56篇 |
1991年 | 40篇 |
1990年 | 44篇 |
1989年 | 48篇 |
1988年 | 44篇 |
1987年 | 39篇 |
1986年 | 38篇 |
1985年 | 30篇 |
1984年 | 22篇 |
1983年 | 21篇 |
1982年 | 18篇 |
1981年 | 17篇 |
1980年 | 14篇 |
1979年 | 17篇 |
1977年 | 13篇 |
1974年 | 19篇 |
1973年 | 17篇 |
1970年 | 12篇 |
排序方式: 共有9135条查询结果,搜索用时 15 毫秒
11.
12.
13.
Dorothy Doughty Janet Ramundo Phyllis Bonham Janice Beitz Paula Erwin-Toth Renee Anderson Bonnie Sue Rolstad 《Journal of wound, ostomy, and continence nursing》2006,33(2):125-30; quiz 131-2
Wound assessment is a key element of effective wound care, and assessment of pressure ulcers includes accurate determination of wound stage. Although the original staging system established by Shea was based on his understanding of the pathology involved in pressure ulcer development, subsequent staging systems (and the one currently in use) were intended simply to establish the level of tissue damage. Recently, clinicians have drawn attention to numerous limitations associated with the current staging system, including the inability to differentiate between an inflammatory response involving intact skin and a deep tissue injury (deep bruising) underneath intact skin. This is a clinically significant difference because clinicians have noted that most inflammatory responses resolve with intervention, whereas most areas of deep tissue injury progress to full-thickness ulcers even when appropriate intervention is provided. A second area of controversy involves partial-thickness (Stage 2) lesions; because many of these lesions are caused by maceration and/or friction (as opposed to pressure) clinicians are frequently unclear regarding which of these lesions should be staged. In response to these concerns, the National Pressure Ulcer Advisory Panel convened a consensus forum and published white papers to clearly outline the issues; they solicited clinician feedback on the white papers and the Wound, Ostomy, Continence Nurses Society provided a written response. This article summarizes the key points of the white papers, WOCN Society response, and consensus forum discussion. 相似文献
14.
15.
In vivo determination of body fat by measuring total body carbon 总被引:2,自引:0,他引:2
J J Kehayias S B Heymsfield A F LoMonte J Wang R N Pierson 《The American journal of clinical nutrition》1991,53(6):1339-1344
Total body carbon (TBC) is measured in vivo by neutron inelastic scattering. The fast neutrons needed for the irradiation are produced by a miniature deuterium-tritium (D-T) neutron generator. Body fat and protein are the main contributors to TBC. Bone ash and carbohydrates contribute less than 3%. Fat is calculated from TBC after the subtraction of the carbon contributions from protein, bone, and glycogen. The technique was applied to 14 normal volunteers (8 females, 6 males) aged 24-94 y who underwent neutron inelastic scattering and neutron activation measurements for body carbon, nitrogen, and calcium. The initial results agree with other techniques. Unlike models that evaluate body fat by subtracting lean body mass from body weight, the TBC technique is not sensitive to assumptions on the composition of lean body; therefore, it is appropriate for studies of adults of any age and health condition. 相似文献
16.
E.Paul Kirk MB BS J. Santa MD T. Heckler MBA M. Collins MD 《American journal of obstetrics and gynecology》1998,178(6):1222-1228
OBJECTIVE: Our purpose was to assess whether legislative action influenced the role of obstetrician-gynecologists as primary care physicians. STUDY DESIGN: An observational study was performed on the basis of a questionnaire sent to 410 obstetrician-gynecologists and 27 medical directors of managed-care organizations. RESULTS: Of 67% of obstetrician-gynecologists and 96% of medical directors who responded, there was agreement as to the content of primary care, but a minority (38%) of obstetrician-gynecologists identified themselves as primary care providers. A minority of medical directors (35%) felt that obstetrician-gynecologists should serve in that role. Both obstetrician-gynecologists and medical directors felt that legislation had little impact. CONCLUSION: The reticence of obstetrician-gynecologists to assume a major role in primary care appears to be the result of an uneasiness with accepting a more comprehensive role in patient management and gatekeeping. They appear comfortable with the more traditional roles but feel that training and experience has not prepared them well for the management of more complex medical problems. (Am J Obstet Gynecol 1998;178:1222-8.) 相似文献
17.
18.
The specialty of pain medicine, as noted by Lippe,“… justifies itself as a unique medical specialty by virtue of a distinct
body of knowledge and a well-defined scope of practice. In common with other medical specialties, it is founded on an infrastructure
of scientific research, education, and clinical practice [1].“ The traditional methods of education for healthcare providers,
such as medical schools, nursing schools, physical therapy schools, and clinical psychology programs, do not prepare their
students adequately for the delivery of evaluation and treatment services to patients experiencing pain. Also apparent, as
evidenced by the dearth of medical literature, is that the traditional methods of educating pain specialists do not adequately
prepare students for an effective approach to the realities of healthcare economics in their respective fields.The result
of a lack of significant education in the economics of pain medicine can be financially devastating to a new practitioner
who is practicing “good” medicine yet not meeting the financial obligations incipient in the operation of a multidisciplinary
pain center or even a solo practice. One important concept in the study of healthcare economics is the issue of cost-effectiveness
[2]. 相似文献
19.
BACKGROUND: Assessment of inpatient asthma management has generally been limited to urban settings, including Chicago, which is known for its high asthma morbidity and mortality. Previously published data have been based on survey methodology. The Suburban Asthma Consortium (SAC) sought to obtain patient-based data unique to the Chicago suburbs to improve asthma care in those areas. OBJECTIVE: To evaluate current inpatient asthma management based on the 1997 National Asthma Education and Prevention Program (NAEPP). DESIGN: Retrospective chart review of all hospitalized patients 3-65 years bearing asthma-related ICD-9 codes for fiscal year 2002 in community, nonteaching hospitals in Chicago suburbs. RESULTS: Nine hundred two cases were submitted from seven hospitals. The majority ( > or = 75%) received inhaled bronchodilators, systemic steroids, oxygen and pulse oximetry. Antibiotic use (67%), chest radiography (85%), complete blood count (77%), and electrolytes (59%) appeared excessive in view of NAEPP recommendations. Peak flow monitoring (PFM) was recorded on admission in 45% of patients 5 years old and older; 52% had PFM during hospitalization. Thirty-eight percent of patients were taking ICS prior to admission; of those not on ICS, only 12% were newly diagnosed asthmatics. Overall, 51% of patients were discharged with ICS. Patients were more likely to receive ICS at discharge if they had required intensive care (ICU), had been on ICS prior to admission, were referred to an asthma specialist while hospitalized, or were insured. Patients with Medicare/Medicaid (MC/MA) had more repeat emergency visits and hospitalizations, longer lengths of stay, and received less ICS at discharge. Depending on the parameter, 41% or less patients received discharge planning education and were not more likely to have received education if in the ICU. Results ranged significantly between hospitals for most parameters (p < 0.05 or less). CONCLUSION: Study subjects received appropriate acute therapy and oxygen monitoring, but there was a divergence from NAEPP recommendations regarding PFM, ICS use, antibiotics, and laboratory evaluation. Patients receiving MC/MA experienced higher morbidity and received less ICS. Discharge asthma education was suboptimal for most hospitals. Most parameters demonstrated significantly wide practice variations between hospitals. Peak flow monitoring and patient education findings differed significantly from those in survey-conducted studies. 相似文献
20.
Milton J. Guiberteau MD Pamela A. Wilcox RN MBA Sandra Bjork RN JD 《Journal of the American College of Radiology》2004,1(2):92-97
Clinical practice guidelines have emerged as a reality for medical practitioners over the past 20 years. Although virtually all groups interested in the development of practice guidelines hope for improvements in patient care, secondary expectations vary widely among those using them. Their use in daily practice by physicians has met with resistance from barriers including concerns of “cookbook” medicine, a loss of autonomy, and increased professional liability. The recent experience of the ACR in addressing these challenges illustrates that physicians are receptive to steps perceived to mitigate the risks accompanying the use of guidelines as well as to efforts to increase their understanding of implementing guidelines in clinical practice. The experiences of other medical societies and an inventory of future trends reveal additional challenges associated with the use of practice guidelines, as third parties look to guidelines as points of reference for gauging the performance of health care providers. 相似文献