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   129篇
  免费   14篇
  国内免费   1篇
儿科学   4篇
基础医学   23篇
口腔科学   1篇
临床医学   43篇
内科学   21篇
皮肤病学   2篇
神经病学   5篇
特种医学   17篇
外科学   2篇
预防医学   20篇
眼科学   2篇
药学   4篇
  2021年   2篇
  2020年   2篇
  2018年   3篇
  2017年   4篇
  2016年   3篇
  2015年   7篇
  2014年   3篇
  2013年   1篇
  2012年   7篇
  2011年   6篇
  2010年   5篇
  2009年   6篇
  2008年   4篇
  2007年   1篇
  2006年   2篇
  2005年   3篇
  2004年   3篇
  2003年   4篇
  2002年   4篇
  2001年   7篇
  2000年   4篇
  1999年   4篇
  1998年   6篇
  1997年   7篇
  1996年   8篇
  1995年   4篇
  1994年   4篇
  1992年   2篇
  1990年   1篇
  1989年   1篇
  1988年   2篇
  1987年   1篇
  1986年   2篇
  1985年   3篇
  1983年   2篇
  1982年   2篇
  1981年   2篇
  1980年   1篇
  1977年   2篇
  1976年   2篇
  1975年   2篇
  1971年   2篇
  1970年   2篇
  1969年   1篇
排序方式: 共有144条查询结果,搜索用时 15 毫秒
61.
62.
63.
64.

Purpose

Percutaneous biopsy obtained from a single location is prone to sampling error in large heterogeneous renal masses, leading to nondiagnostic results or failure to detect poor prognostic features. We evaluated the accuracy of percutaneous biopsy for large renal masses using a modified multi-quadrant technique vs. a standard biopsy technique.

Materials and methods

Clinical and pathological data for all patients with cT2 or greater renal masses who underwent percutaneous biopsy from 2009 to 2014 were reviewed. The multi-quadrant technique was defined as multiple core biopsies from at least 4 separate solid enhancing areas in the tumor. The incidence of nondiagnostic findings, sarcomatoid features and procedural complications was recorded, and concordance between biopsy specimens and nephrectomy pathology was compared.

Results

A total of 122 biopsies were performed for 117 tumors in 116 patients (46 using the standard biopsy technique and 76 using the multi-quadrant technique). Median tumor size was 10 cm (IQR: 8–12). Biopsy was nondiagnostic in 5 of 46 (10.9%) standard and 0 of 76 (0%) multi-quadrant biopsies (P = 0.007). Renal cell carcinoma was identified in 96 of 115 (82.0%) tumors and nonrenal cell carcinoma tumors were identified in 21 (18.0%). One complication occurred using the standard biopsy technique and no complications were reported using the multi-quadrant technique. Sarcomatoid features were present in 23 of 96 (23.9%) large renal cell carcinomas studied. Sensitivity for identifying sarcomatoid features was higher using the multi-quadrant technique compared to the standard biopsy technique at 13 of 15 (86.7%) vs. 2 of 8 (25.0%) (P = 0.0062).

Conclusions

The multi-quadrant percutaneous biopsy technique increases the ability to identify aggressive pathological features in large renal tumors and decreases nondiagnostic biopsy rates.  相似文献   
65.
66.
This paper reviews the mechanisms of anaphylactic shock in terms of the immunoglobulin and non-immunoglobulin triggering events; and the cellular events based on the rise in intracellular cyclic AMP and calcium that release preformed granule associated mediators and the rapidly formed, newly synthesised mediators predominantly based on arachidonic acid metabolism. These primary mediators recruit other cells with the release of secondary mediators that either potentiate or ultimately curtail the anaphylactic reaction. The roles of these mediators in the various causes of cardiovascular collapse are examined. The treatment of anaphylactic shock involves oxygen, adrenaline and fluids. The importance and safety of intravenous adrenaline are discussed. Combined H1 and H2 blocking antihistamines and steroids have a limited role. Glucagon and other adrenergic drugs are occasionally used, and there are several new experimental drugs.  相似文献   
67.
US-guided percutaneous cryoablation of prostate cancer   总被引:3,自引:0,他引:3  
Lee  F; Bahn  DK; McHugh  TA; Onik  GM; Lee  FT  Jr 《Radiology》1994,192(3):769
  相似文献   
68.
While most births result in a live baby, stillbirth (the birth of a dead baby) occurs in nearly 1 in 110 pregnancies. This study examined whether levels of maternal anxiety and depression are lower amongst mothers who received social support after stillbirth. Using non-probability sampling, data were collected from 769 mothers residing within the USA who experienced a stillbirth within the past 18 months and for whom we have complete data. The study Maternal Observations and Memories of Stillbirth and the website http://www.momstudy.com containing the questionnaire were open in the period 8 February 2004–15 September 2005. Congruent with the family stress and coping theory, mothers of stillborn babies who perceived family support in the period after stillbirth experienced levels of anxiety and depression that were notably lower than those of their counterparts. Nurses, physicians and support groups also were important sources of support after a stillbirth; however, these sources of support alone were not statistically significant in reducing anxiety and depression in grieving mothers. Community interventions should focus on the grieving mother and her family system , including her partner and surviving children.  相似文献   
69.
The case reports of 22 patients with cervical pregnancies treated by methotrexate (MTX) administration and published in English literature between 1983 and 1995 were reviewed, by either original paper review or follow-up under international collaboration, to determine the subsequent reproductive performance and obstetric outcomes. Out of 22 cases, 18 (78%) MTX chemotherapy attempts succeeded with complete remission and four (22%) failed. Of the 13 women who wished to conceive and could be followed for at least 3 years, nine succeeded in having live births without congenital malformations, one spontaneously aborted and three suffered infertility. In general, MTX chemotherapy alone or combined with adjuvant methods such as subsequent cervical curettage or cervical tamponade, or intracervical potassium chloride injection, appears to be a convenient and effective method for the treatment of the majority of cervical pregnancies before 12 weeks gestation, and has not been shown to have detrimental effects on subsequent reproductive capacities, obstetric outcomes and progeny health for those cases with successful preservation of the uteri.   相似文献   
70.
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