首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   214篇
  免费   2篇
儿科学   4篇
妇产科学   19篇
基础医学   19篇
口腔科学   3篇
临床医学   26篇
内科学   47篇
皮肤病学   7篇
神经病学   12篇
外科学   19篇
一般理论   2篇
预防医学   29篇
眼科学   1篇
药学   26篇
肿瘤学   2篇
  2023年   1篇
  2017年   1篇
  2015年   1篇
  2014年   1篇
  2013年   10篇
  2012年   3篇
  2011年   1篇
  2010年   7篇
  2009年   11篇
  2008年   1篇
  2007年   3篇
  2006年   2篇
  2005年   2篇
  2004年   2篇
  2003年   2篇
  2001年   4篇
  2000年   1篇
  1999年   8篇
  1998年   9篇
  1997年   17篇
  1996年   10篇
  1995年   8篇
  1994年   14篇
  1993年   7篇
  1992年   13篇
  1991年   15篇
  1990年   6篇
  1989年   7篇
  1988年   7篇
  1987年   5篇
  1986年   8篇
  1985年   8篇
  1984年   5篇
  1983年   1篇
  1982年   3篇
  1981年   2篇
  1980年   1篇
  1979年   1篇
  1977年   2篇
  1973年   1篇
  1971年   1篇
  1966年   1篇
  1965年   1篇
  1964年   1篇
  1957年   1篇
排序方式: 共有216条查询结果,搜索用时 15 毫秒
41.
Background: Pediatric craniofacial reconstruction (CFR) procedures involve wide scalp dissections with multiple osteotomies and have been associated with significant morbidity. The aim of this study was to document the incidence of clinically important problems, particularly related to blood loss, and perform a risk factor analysis. Methods:  Records of all patients who underwent craniofacial surgery at the Children’s Hospital of Philadelphia between December 1, 2001 and January 1, 2006 were reviewed. Data were collected from the electronic anesthesia record, intensive care unit (ICU) progress notes, and discharge summary. All intraoperative laboratory values and all laboratory values obtained upon arrival in the ICU were recorded. A multivariable analysis was performed to evaluate associations between elements of intraoperative management and the following clinical outcomes: intraoperative hypotension, intraoperative metabolic acidosis, presence of a postoperative coagulation test abnormality, and postoperative administration of hemostatic blood products. Results:  Data for 159 patients were reviewed. The mean volume of packed red blood cells transfused intraoperatively was 51 ml·kg?1. Multivariable analysis revealed that intraoperative administration of albumin was strongly correlated with both an increased incidence of postoperative coagulation derangements and postoperative administration of hemostatic blood products (Odds Ratio 5.9, 2.8, respectively), while intraoperative fresh frozen plasma (FFP) administration was associated with an opposite effect (Odds Ratio 0.94, 0.97, respectively). Conclusions:  In pediatric CFR procedures where the volume of blood loss routinely exceeds one blood volume, intraoperative administration of FFP favorably impacted postoperative laboratory coagulation parameters.  相似文献   
42.
Many women who have had cardiac valve replacements have reached or will soon be reaching childbearing age. Pregnancy exposes these women to potential problems resulting from the previous valvuloplasty. The three most common problems in this population--thromboembolism, infective endocarditis, and myocardial decompensation are discussed through a review of current literature. Preventive measures and treatment modalities are presented in order to assist nurses caring for these clients during their pregnancy.  相似文献   
43.
BACKGROUND: The aim of the present paper was to determine whether monthly i.v. immunoglobulin (IVIG) could be safely discontinued in antiretroviral-treated human immunodeficiency virus (HIV)-infected children. METHODS: In a double-blind cross-over trial, children < or =18 years with HIV infection, well controlled on antiretroviral therapy, were randomized to alternating courses of 3 consecutive months of IVIG (400 mg/kg once a month) and 3 consecutive months of placebo for 1 year. The primary outcome was days of fever per month. Secondary outcomes were frequency of serious infections, changes in HIV viral load (VL), CD4+ counts and IgG levels. RESULTS: Fifteen children were enrolled. Using the revised pediatric HIV clinical classification system of the Centers for Disease Control and Prevention, eight were severely symptomatic (C), four were moderately symptomatic (B) and three were mildly symptomatic (A). There were no statistically significant outcome measures. The mean number of days of fever per month with IVIG versus placebo was 0.55 days versus 1.48 days (P = 0.11). The difference was 0.9 days (95% confidence interval: +2.05 to -0.25). There were no serious infections in either period. For the IVIG versus placebo periods, mean CD4 counts were 970 cells/microL versus 906 cells/microL (P = 0.12), VL 2.90 log(10) copies/mL versus 2.82 log(10) copies/mL (P = 0.70) and IgG levels were 17.41 g/L versus 16.6 g/L (P = 0.13). CONCLUSION: In antiretroviral-treated HIV-infected children short-term withdrawal of monthly IVIG was not associated with a significant increase in incidence of infections or a decline in immunologic function (CD4 count, viral load and IgG levels). These results suggest that monthly IVIG can be safely discontinued in HIV-infected children who are clinically stable and receiving combination antiretroviral therapy.  相似文献   
44.
45.
BACKGROUND: Sleep plays a critical role in normal development and the effects of culture upon sleep are especially important in young children. The purpose of the present paper was to determine the sleep times and the prevalence of sleep problems and co-sleeping in children from Shanghai. METHODS: A cross-sectional design incorporating parental self-report was used to investigate the sleep-related habits of 1129 children, 1-23 months of age, randomly selected from the five districts of Shanghai, China. RESULTS: The total sleep time (TST) of Chinese young children was less than that reported in Western populations, and the prevalence of sleep problems (65.97%) was higher than that for Western children. The sleep problems of children were significantly related to perinatal factors and certain behavior problems. The rate of bed sharing did not differ between boys and girls but significantly increased with age from 44.07% in 1-month-olds to 71.51% in 23-month-olds. CONCLUSIONS: Sleep problems that cross cultures result from a variety of behavioral and health problems. Nevertheless, it is speculated that reduced TST in Chinese children may be related to factors unique to China, such as co-sleeping and child-rearing practices.  相似文献   
46.
PURPOSE: Clinical experience and epidemiological studies suggest that patients with interstitial cystitis have multiple nonbladder related symptoms. However, to our knowledge this finding has not been tested with a validated questionnaire and matched controls. With the University of Wisconsin scale, we compare the scores for patients with interstitial cystitis to those for control subjects. This validated questionnaire includes 7 bladder and 18 reference symptoms not related to the bladder. MATERIALS AND METHODS: A total of 35 female patients with interstitial cystitis and 35 age matched female controls completed the University of Wisconsin questionnaire. RESULTS: For the 7 bladder symptoms the difference between interstitial cystitis and control groups was extremely significant (p = 0.0001). Patients with interstitial cystitis had higher scores than controls for 2 reference symptoms, including other pelvic discomfort, backache, dizziness, chest pain, aches in joints, abdominal cramps, nausea, heart pounding and headache (p <0.01). However, they did not have higher scores for blind spots and/or blurred vision, numbness and/or tingling in fingers or toes, swollen ankles, feeling of suffocation, sore throat, cough, flu, nasal congestion and ringing in ears. The majority of patients with interstitial cystitis had a 0 score for all but 2 of the reference symptoms. CONCLUSIONS: Patients with interstitial cystitis had increased scores for 9 reference symptoms but did not indiscriminately report high scores for generalized complaints. This result suggests that in some cases of interstitial cystitis the pathophysiology may affect other organ systems besides the bladder. Alternatively, some of these symptoms may result from changes in sleep pattern or other factors associated with interstitial cystitis.  相似文献   
47.
BACKGROUND: Axillary osmidrosis and hyperhidrosis are distressing social problems, particularly in Asian societies. Various treatment methods have been developed for removal of the apocrine and eccrine glands. But conventional surgical methods often lead to significant scarring and frequent recurrence. OBJECTIVE: To evaluate the effect of liposuction with curettage using a new device, the Fatemi cannula, in the treatment of axillary osmidrosis and hyperhidrosis. METHODS: From August 2003 through December 2004, 25 patients (15 women and 10 men) with axillary osmidrosis or hyperhidrosis were treated by tumescent liposuction and curettage. The results of malodor elimination were graded by the patients as excellent, good, fair, and poor. Changes in axillary sweating and hair growth, postoperative scarring, patient satisfaction degree, and complications were also evaluated. Biopsies of the axillary skin were performed in 14 patients. RESULTS: Of the 50 axillae, 38 (76.0%) were graded as excellent results, 11 (22.0%) were good, and one (2.0%) was fair. No serious complications were noted except temporary ecchymosis and local infection in minor cases. The preoperative histologic examinations showed large and numerous apocrine glands and postoperative significant decrease and degeneration of them. CONCLUSION: Tumescent liposuction with dermal curettage using the Fatemi cannula is an effective and safe method in the treatment of axillary osmidrosis and hyperhidrosis.  相似文献   
48.
49.
Thirty-nine patients with idiopathic cranial diabetes insipidus (DI) and 81 secondary to hypothalamic lesions were investigated for the presence both of associated autoimmune diseases and autoantibodies. Eleven (28%) of the idiopathic but none of the secondary DI cases had an overt autoimmune disease. A further two patients with idiopathic DI had associated organ-specific autoantibodies. Autoantibodies to vasopressin (AVP)-secreting hypothalamic cells were detected in 12 patients with idiopathic DI (31%). Seven out of 13 cases of DI secondary to histiocytosis X (HX) were also positive (54%), whereas only two (3%) of the other 68 sera from patients with secondary DI reacted with AVP cels. Of the 13 patients with DI associated with frank organ-specific autoimmune diseases or autoantibodies alone, eight (62%) were positive for AVP-cell antibodies. The finding of associated autoimmune diseases in a patient with idiopathic DI is therefore suggestive of an autoimmune origin of DI, and this can be supported by the detection in the serum of AVP cell antibodies. In cases of HX, the new finding of the presence of AVP-cell antibodies reflects hypothalamic infiltration by HX cells, and suggests that DR + 'Langerhans-like' cells play more than a passive role in the hypothalamic lesion.  相似文献   
50.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号