全文获取类型
收费全文 | 506篇 |
免费 | 27篇 |
国内免费 | 2篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 39篇 |
妇产科学 | 20篇 |
基础医学 | 56篇 |
口腔科学 | 15篇 |
临床医学 | 45篇 |
内科学 | 86篇 |
皮肤病学 | 14篇 |
神经病学 | 23篇 |
特种医学 | 36篇 |
外科学 | 51篇 |
综合类 | 22篇 |
预防医学 | 22篇 |
眼科学 | 18篇 |
药学 | 53篇 |
中国医学 | 1篇 |
肿瘤学 | 33篇 |
出版年
2023年 | 3篇 |
2022年 | 7篇 |
2021年 | 11篇 |
2020年 | 5篇 |
2019年 | 5篇 |
2018年 | 11篇 |
2017年 | 14篇 |
2016年 | 14篇 |
2015年 | 17篇 |
2014年 | 24篇 |
2013年 | 26篇 |
2012年 | 25篇 |
2011年 | 20篇 |
2010年 | 15篇 |
2009年 | 22篇 |
2008年 | 21篇 |
2007年 | 18篇 |
2006年 | 24篇 |
2005年 | 22篇 |
2004年 | 28篇 |
2003年 | 23篇 |
2002年 | 12篇 |
2001年 | 14篇 |
2000年 | 7篇 |
1999年 | 9篇 |
1998年 | 15篇 |
1997年 | 10篇 |
1996年 | 10篇 |
1995年 | 4篇 |
1994年 | 7篇 |
1993年 | 6篇 |
1992年 | 5篇 |
1990年 | 7篇 |
1989年 | 6篇 |
1988年 | 3篇 |
1987年 | 8篇 |
1986年 | 4篇 |
1985年 | 4篇 |
1984年 | 5篇 |
1983年 | 7篇 |
1981年 | 3篇 |
1980年 | 4篇 |
1977年 | 3篇 |
1976年 | 3篇 |
1975年 | 2篇 |
1974年 | 2篇 |
1973年 | 3篇 |
1971年 | 2篇 |
1967年 | 2篇 |
1966年 | 2篇 |
排序方式: 共有535条查询结果,搜索用时 15 毫秒
31.
Transient diabetes mellitus in early infancy 总被引:1,自引:0,他引:1
32.
Hagith Nagar 《Pediatric surgery international》1993,8(3):268-269
Crossed testicular ectopia is characterized by the presence of both testes in one hemiscrotum. A 7-month-old boy with this condition is described and the relevant literature reviewed. Although this anomaly has been recognized for over 100 years, its etiology is not yet established. The advent of ultrasonography has allowed early diagnosis and therapy in recent years. 相似文献
33.
34.
O'Brien MM Shroyer AL Moritz TE London MJ Grunwald GK Villanueva CB Thottapurathu LG MaWhinney S Marshall G McCarthy M Henderson WG Sethi GK Grover FL Hammermeister KE;VA Cooperative Study Group on Processes Structures Outcomes of Care in Cardiac Surgery 《Medical care》2004,42(1):59-70
BACKGROUND: Information is limited regarding the effects of processes of care on cardiac surgical outcomes. Correspondingly, many recommended cardiac surgical processes of care are derived from animal experiments or clinical judgment. This report from the VA Cooperative Study in Health Services, "Processes, Structures, and Outcomes of Cardiac Surgery," focuses on the relationships between 3 process groups (preoperative evaluation, intraoperative care, and supervision by senior physicians) and a composite outcome, perioperative mortality and morbidity. METHODS: Data on 734 risk, process, and structure variables were collected prospectively on 3,988 patients who underwent coronary artery bypass grafting at 14 VA medical centers between 1992 and 1996. Data reduction was accomplished by examining data completeness and variation across sites and surgeon, using previously published data and clinical judgment. We then applied multivariable logistic regression to the 39 remaining processes of care to determine which were related to the composite outcome after adjusting for 17 patient-related risk factors and controlling for intraoperative complications. RESULTS: Our first analysis showed several measures of operative duration, the use of inotropic agents, transesophageal echo, lowest systemic temperature, and hemoconcentration/ultrafiltration, to be powerful predictors of the composite outcome. Because the use of inotropic agents and operative duration may be related to an intermediate outcome (eg, intraoperative complications), we performed a second analysis omitting these processes. The use of intraoperative transesophageal echo and hemoconcentration/ultrafiltration remained significantly associated with an increased risk of an event (odds ratios 1.60 and 1.36, respectively). CONCLUSIONS: Our results viewed in the context of past studies suggest the possibility that inotropic use, TEE, and hemoconcentration/ultrafiltration may have adverse effects on operative outcome. Further evaluation of these processes of care using observational data, as well as randomized trials when feasible, would be of interest. 相似文献
35.
Raut AA Nagar AM Narlawar RS Bhatgadde VL Sayed MN Hira P 《The British journal of radiology》2004,77(916):338-341
Skeletal echinococcosis is a relatively rare entity and that of the rib is exceptional. Less than 50 cases of costal echinococcosis have been reported in the literature so far. Accurate pre-operative diagnosis aids in appropriate management and helps to eradicate the disease. This also prevents the dissemination of parasite and further complications. We report a case of echinococcosis of the rib with epidural extension in a young adult who presented with paraparesis and back pain. His laboratory investigations were within normal limits. Plain radiographs of the dorsal spine, CT scan of thorax and MRI of dorsal spine were performed. The imaging features were suggestive of echinococcosis involving the rib with epidural extension. The cyst was completely resected. Histopathology of the resected specimen confirmed the diagnosis of echinococcosis. 相似文献
36.
Nagar AM Raut AA Narlawar RS Bhatgadde VL Rege S Thapar V 《The British journal of radiology》2004,77(923):957-958
Leiomyomas of the renal parenchyma and of the capsule are rare. These tumours are normally small asymptomatic and often detected incidentally. Large renal leiomyomas can present with pain or as an abdominal mass, but they are rare. The imaging features of these tumours have been poorly described in the literature. A radiological distinction from other renal neoplasms is often difficult to make owing to the similarity of imaging findings. We report two patients with renal leiomyomas who presented with pain and an abdominal mass. Both patients underwent nephrectomy and histological evaluation confirmed the diagnosis of leiomyoma. 相似文献
37.
38.
Nagar H Kessler A Ben-Sira L Klepikov I Wiess J Graif M 《Pediatric surgery international》2003,19(9-10):677-679
Acute abdomen is caused by a wide variety of etiologies, many of which require surgical intervention. Two boys were hospitalized for acute abdominal pain and low-grade fever. Physical examination revealed epigastric and right upper abdominal fullness, and laboratory studies showed elevated erythrocyte sedimentation rates, with normal leukocyte counts and coagulation profiles. Abdominal ultrasound and computerized tomography revealed pseudotumor in both cases. Symptomatic treatment and cefazolin were administered, and pain and fever subsided after 6 to 10 days. Pseudotumor due to omental infarction can present as acute abdomen in children. A high index of suspicion and the use of both ultrasonography and computerized tomography will help avoid unnecessary surgical intervention in such cases. 相似文献
39.
Nagar H 《Pediatric surgery international》2001,17(7):513-514
Umbilical granuloma (UG) is the most common umbilical abnormality in neonates, causing inflammation and drainage. Most fail
to epithelialize and persist for more than 2 months. The common treatment is application of a 75% silver nitrate stick, usually
repeated two to three times over a number of clinic visits. Burns have been reported following spillage onto the surrounding
tissues. During a 10-year period, 302 neonates were treated for UG using excision and application of absorbable hemostatic
materials. Healing was uneventful in all cases, and no complications have been encountered to date. This technique is simple,
safe, and inexpensive, and obviates the need for repeated outpatient visits.
Accepted: 30 October 2000 相似文献
40.
Nagar S Juyal RC Chaudhary S Behari M Gupta M Rao SN Thelma BK 《Acta neurologica Scandinavica》2001,103(2):120-122
OBJECTIVE: To investigate the prevalence of G88C, G209A and any other mutation(s) in exons 3 and 4 of the alpha-synuclein gene in Indian patients with Parkinson's disease (PD). METHODS: A total of 169 PD patients comprising 18 familial, 3 juvenile, 48 early onset and 100 sporadic cases were included in this study. Genomic DNA was amplified by PCR using primers specific for Exons 3 and 4. Mutations at G88C and G209A were screened following restriction enzyme digestion of the PCR product. Direct PCR product sequencing of entire exons 3 and 4 was carried out for at least one proband each from the 10 familial cases. RESULTS: Neither G88C and G209A mutations nor any other mutation in exons 3 and 4 was found in the PD patients analysed. CONCLUSION: The G88C and G209A mutations do not seem to be the predominant genetic determinant of PD among Indians. 相似文献