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排序方式: 共有685条查询结果,搜索用时 15 毫秒
1.
Del Lama Rafael Silva Candido Raquel Mariana Chiari-Correia Natália Santana Nogueira-Barbosa Marcello Henrique de Azevedo-Marques Paulo Mazzoncini Tinós Renato 《Journal of digital imaging》2022,35(3):446-458
Journal of Digital Imaging - Vertebral Compression Fracture (VCF) occurs when the vertebral body partially collapses under the action of compressive forces. Non-traumatic VCFs can be secondary to... 相似文献
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A Morales M C Torres J L Megias A Candido A Maldonado 《Pharmacology, biochemistry, and behavior》1992,43(1):153-157
The effect of administration of diazepam on successive negative contrast in one-way avoidance learning was examined in rats. Contrast was induced by shifting rats from a large reward, 30 s spent in the safe compartment, to a small reward, 1 s spent in the safe compartment. IP administration of 2 mg/kg diazepam eliminated this negative contrast. Moreover, this effect is dose dependent, with doses of 2 and 2.5 mg/kg, but not 0.5 mg/kg, effective in reliably reducing contrast. These results suggest the existence of similar or common underlying mechanisms in both aversive and appetitive contrast effects; they are discussed in light of the current theories of frustrative nonreward and as a mean of studying the behavioral and biological mechanisms of anxiety. 相似文献
4.
Pedro Magno José Loureiro Alexandre Marques Pedro Farto E Abreu Machado Candido Paulo Leal Victor M Gil 《Revista portuguesa de cardiologia》2007,26(10):1033-1042
Ischemic stroke occurs in 0.2-0.4% of patients undergoing left heart catheterization, and is responsible for 5-10% of the mortality associated with the procedure. The main predisposing factors for this complication are female gender, complex atherosclerotic plaques in the ascending aorta, and peripheral arterial disease. The possibility of timely intervention with reperfusion therapy supports close clinical monitoring during the immediate post-catheterization period. The cardiologist should be familiar with the various types of stroke reperfusion therapy and its indications according to the time interval between catheterization and the stroke. The decision should be discussed with neurology and neuroradiology. 相似文献
5.
The initiation of a reentrant circuit requires a zone of slow conduction and a zone of unidirectional block. This study used
computer model conditions under which partial coupling between segments of cardiac Purkinje tissue resulted in unidirectional
block. The structure used was one-dimensional and divided into three segments: a middle segment of variable length coupled
to two long (semi-infinite in concept) segments. The DiFrancesco-Noble equations represented the ionic currents of the membrane.
The results show that the possibility of unidirectional block depends on the size of the middle segment and the coupling resistances
between the segments. No combination of coupling resistances allowed unidirectional block for middle segments with a length
of two space constants (4 mm) or longer. Unidirectional block occurred for many combinations of coupling resistances as the
length of the middle segment decreased to around half a space constant (1 mm). The number of length combinations that caused
unidirectional block decreased again as segment length further decreased. These results provide a possible mechanism of unidirectional
block for situations where islands of viable tissue are connected through nonviable tissue, such as in a healed myocardial
infarction. 相似文献
6.
Jose R. Gonzalez‐Porras Fernando Escalante Emilia Pardal Magdalena Sierra Luis J. Garcia‐Frade Santiago Redondo Maryam Arefi Carlos Aguilar Fernando Ortega Erik de Cabo Rosa M. Fisac Oscar Sanz Carmen Esteban Ignacio Alberca Mercedes Sanchez‐Barba Maria T. Santos Abel Fernandez Tomas J. Gonzalez‐Lopez representing the Grupo de Trombosis y Hemostasia de Castilla y León 《European journal of haematology》2013,91(3):236-241
7.
Setor K. Kunutsor Michael R. Whitehouse Ashley W. Blom Tim Board Peter Kay B. Mike Wroblewski Valérie Zeller Szu-Yuan Chen Pang-Hsin Hsieh Bassam A. Masri Amir Herman Jean-Yves Jenny Ran Schwarzkopf John-Paul Whittaker Ben Burston Ronald Huang Camilo Restrepo Javad Parvizi Sergio Rudelli Emerson Honda David E. Uip Guillem Bori Ernesto Muñoz-Mahamud Elizabeth Darley Alba Ribera Elena Cañas Javier Cabo José Cordero-Ampuero Maria Luisa Sorlí Redó Simon Strange Erik Lenguerrand Rachael Gooberman-Hill Jason Webb Alasdair MacGowan Paul Dieppe Matthew Wilson Andrew D. Beswick The Global Infection Orthopaedic Management Collaboration 《European journal of epidemiology》2018,33(10):933-946
One-stage and two-stage revision strategies are the two main options for treating established chronic peri-prosthetic joint infection (PJI) of the hip; however, there is uncertainty regarding which is the best treatment option. We aimed to compare the risk of re-infection between the two revision strategies using pooled individual participant data (IPD). Observational cohort studies with PJI of the hip treated exclusively by one- or two-stage revision and reporting re-infection outcomes were retrieved by searching MEDLINE, EMBASE, Web of Science, The Cochrane Library, and the WHO International Clinical Trials Registry Platform; as well as email contact with investigators. We analysed IPD of 1856 participants with PJI of the hip from 44 cohorts across four continents. The primary outcome was re-infection (recurrence of infection by the same organism(s) and/or re-infection with a new organism(s)). Hazard ratios (HRs) for re-infection were calculated using Cox proportional frailty hazards models. After a median follow-up of 3.7 years, 222 re-infections were recorded. Re-infection rates per 1000 person-years of follow-up were 16.8 (95% CI 13.6–20.7) and 32.3 (95% CI 27.3–38.3) for one-stage and two-stage strategies respectively. The age- and sex-adjusted HR of re-infection for two-stage revision was 1.70 (0.58–5.00) when compared with one-stage revision. The association remained consistently absent after further adjustment for potential confounders. The HRs did not vary importantly in clinically relevant subgroups. Analysis of pooled individual patient data suggest that a one-stage revision strategy may be as effective as a two-stage revision strategy in treating PJI of the hip. 相似文献
8.
I. Stanganelli G. Argenziano F. Sera A. Blum F. Ozdemir I.K. Karaarslan D. Piccolo K. Peris H. Kirchesch R. Bono M.A. Pizzichetta S. Gasparini R.P. Braun O. Correia L. Thomas P. Zaballos S. Puig J. Malvehy M. Scalvenzi H. Rabinovitz A. Bergamo G. Pellacani C. Longo M. Pavlovic C. Rosendahl R. Hofmann‐Wellenhof H. Cabo A.A. Marghoob D. Langford S. Astorino A.M. Manganoni J.‐Y. Gourhant J. Keir J.M. Grichnik G. Fumo H. Dong A.M. Sortino Rachou G. Ferrara I. Zalaudek 《Journal of the European Academy of Dermatology and Venereology》2012,26(8):953-963
Background Little is known about the dermoscopic features of scalp tumours. Objective To determine the dermoscopic features of scalp tumours. Methods Retrospective analysis of dermoscopic images of histopathologically diagnosed scalp tumours from International Dermoscopy Society members. Results A total of 323 tumours of the scalp from 315 patients (mean age: 52 years; range 3–88 years) were analysed. Scalp nevi were significantly associated with young age (<30 years) and exhibited a globular or network pattern with central or perifollicular hypopigmentation. Melanoma and non‐melanoma skin cancer were associated with male gender, androgenetic alopecia, age >65 years and sun damage. Atypical network and regression were predictive for thin (≤1 mm) melanomas, whereas advanced melanomas (tumour thickness > 1 mm) revealed blue white veil, unspecific patterns and irregular black blotches or dots. Conclusions The data collected provide a new knowledge regarding the clinical and dermoscopy features of pigmented scalp tumours. 相似文献
9.
Cabo RA Castedo E Pastrana M Crespo R Montero CG Ugarte J 《Revista espa?ola de cardiología》2003,56(6):626-628
Pheochromocytoma is a catecholamine-producing tumor and a rare cause of hypertension. Most cases are intra-adrenal and intrapericardial pheochromocytomas are extremely uncommon. We report the case of a 46-year-old woman with a 1-year history of hypertension, in which a right atrial pheochromocytoma was detected after a hypertensive crisis. 131I-metaiodobenzylguanidine scintigraphy and magnetic resonance imaging established the diagnosis. The tumor was successfully resected using cardiopulmonary bypass and the right atrium was reconstructed using bovine pericardium. 相似文献
10.
Liz Nayibe Martínez Saavedra Ricardo Gonalves Penido Lucas de Azevedo Santos Teodorico C. Ramalho Bruno E. Lobo Baeta Mrcio C. Pereira Adilson Candido da Silva 《RSC advances》2018,8(50):28775
The effects of solvent on the synthesis of molecularly imprinted polymers (MIPs) for the selective adsorption of quinoline were evaluated in this work. The MIPs were synthesized by the “bulk” method using the quinoline molecule (IQ) as a template in different solvents, such as toluene (MIPT) and chloroform (MIPC). The adsorbents were characterized by thermogravimetric analysis (TGA), Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), and N2 adsorption/desorption measurements. The influences of time, adsorbate concentration, and temperature on the adsorption of quinoline by MIPT and MIPC were evaluated. Maximum adsorption capacities (qe) of 35.23 and 24.10 mg g−1 were obtained for MIPT and MIPC, respectively. Thermodynamic studies indicate that occur physisorption and a spontaneous process (ΔadsG° < 0) entropically directed. Finally, the highest selectivity and reusability of MIPC for quinoline adsorption was ascribed to the better interaction between the chloroform and monomer, which favors the formation of porous adsorbents with higher numbers of adsorption sites.Molecularly imprinted polymers synthesized by a one-pot synthesis absorb quinoline efficiently and selectively. 相似文献