Search PubMed⌕ Search

Biomedical subjects

C Fuentes

Publications and source records attributed to C Fuentes.

At least 19 recordsLinked to original sources
PubMed1995

Late complication of a Greenfield filter associating caudal migration and perforation of the abdominal aorta by a ruptured strut.

We report the case of a 67-year-old woman who was admitted for surgical removal of a Greenfield filter that had been inserted 7 years before because of recurrent deep vein thrombosis associated with pulmonary embolism. This complication appeared on a plain abdominal radiogram that showed a 7 cm distal migration of the filter, a 30-degree angulation, and rupture of a strut at the level of the hub. Computed tomography, aortography, and ascending cavography demonstrated that the inferior vena cava was perforated by the struts and that the ruptured strut had penetrated the infrarenal aorta. As demonstrated by scanning electron microscopy, the fracture was due to a structural defect of the strut at its insertion point within the hub, with no sign of corrosion. Energy-dispersive radiography analysis failed to demonstrate impurity in the metal composition.

Aged↗
PubMed1991

Age influence on mononuclear phagocyte system Fc-receptor function in poststreptococcal nephritis.

The Fc-receptor function of the mononuclear phagocyte system (MPS) was examined in 41 children and adult patients, by measuring the clearance of IgG-sensitized, 51Cr-labeled erythrocytes. The Fc-receptor-mediated clearance observed in patients (mean +/- SE) was not significantly different as compared to the control group of similar age distribution. However, the immune clearance time was significantly age-correlated in both groups (acute poststreptococcal glomerulonephritis, APSGN, r = 0.39, p less than 0.05; control r = 0.63, p less than 0.01). The magnitude of the Fc-specific immune clearance and the serum creatinine were also significantly correlated (r = 0.59; p less than 0.01). Circulating immune complexes (as measured by the C1q and conglutinin ELISA) did not correlate with immune clearance, which remained stable in longitudinal studies. Age-related changes in MPS Fc-receptor function could explain, at least in part, prognostic differences between children and adult patients with APSGN.

Adolescent↗
PubMed1984

The cornu ammonis and alcoholic cirrhotic encephalopathy. A neuropathological and immunohistological study.

Two distinct categories of facts are deduced from a neuropathological study of the Ammon's horn, in particular the Sommer Sector, afflicted with alcoholic cirrhotic encephalopathy. In the pyramidal neurons of the CA1 layer, there are unquestionably paired filaments in a helical form, which correspond to the now classic "paired helical filaments". On the other hand, whereas the astrocyte population on the whole displays the characteristics of what can be called Alzheimer type II cells, a certain number of highly reactive areas persist, which can be detected by a GFAP-specific immunohistochemical method.

Alzheimer Disease↗
PubMed1984

[Astrocytic response in alcoholic cirrhotic encephalopathy (immunohistochemical study)].

In human alcoholic cirrhotic encephalopathy, most of astrocytes of the cerebral cortex appear as Alzheimer type II cells. Thus, they cannot be visualized by the immunocytochemical detection of Glial Fibrillary Acidic protein (GFAP). However, fibrous astrocytes present in layer I of the cortex and in the vicinity of the white matter are GFAP positive. This special reactivity of layer I astrocytes could correspond to the persistance of the characters of primitive neuropil.

Aged↗
PubMed1981

[Retrograde transneural degeneration in the visual system: neuromorphological study and problems (author's transl)].

The unilateral resection have been done entirely or in part of the primary visual cortex in 10 cats with various postoperational delays. In all cases, some large and medium axons in the primary optic tract show signs of degeneration, leading to their disappearance along with an important glial reaction. As there in similar signs of degeneration, but apparently less important in all normal cats used for control, it is worth-while to reconsider the notion of retrograde transneuronal degeneration after cortical lesion.

Animals↗
PubMed1980

[Bodian process. Ultrastructural study].

The Bodian method was used for an ultrastructural study on the optic nerve of the adult cat in order to compare the effects of two fixation techniques on the normal nerve and on the nerve during Wallerian degeneration after unilateral enucleation. Immersion fixation causes a predominately metallic deposit in the myelin sheath; the perfusion has no effect. During the Wallerian degeneration the two fixation methods lead to a metallic deposit located in the axon which is in large grains after immersion and extremely dense after perfusion. Various diffraction methods were used to identify the nature of the metallic deposit. These results emphasize the positive elements in systemically associating the electron microscope with the optic microscope for studies concerning Wallerian degeneration after metallic impregnation in the central nervous system

Animals↗