Search PubMed⌕ Search

Biomedical subjects

C Rossi

Publications and source records attributed to C Rossi.

At least 325 records · Page 18Linked to original sources
PubMed1981

[Current role of angiography in the diagnosis of hepatic cavernous hemangioma].

46 cases of cavernous hemangioma of the liver, studied by angiography, are reported. Part of them were studied with echotomography and CT too, and 28 with angiotomography. In author's opinion based on experience, angiographic diagnosis of the lesion is, in presence of typical angiographic patterns, always confirmed, while echotomography and CT are not specific, especially in differential diagnosis with neoplastic malignant, primitive or secondary, hepatic lesions. Diagnostic algorithm needs, in their opinion, an initial echotomographical phase and, in presence of positive pictures for expansive hepatic mass with clinical suspicion for haemangioma, angiography and angiotomography for complete and specific diagnosis.

Adult↗
PubMed1980

Encoding of the angular position of the two distal joints of the spiny lobster antennae by a single mechanoreceptor.

In the spiny lobster antennae, the two distal joints (J2, J3) rotate in approximately the same plane, their combined movements extending and flexing the flagellum forwards and backwards from the cephalothorax. A single mechanoreceptor (the chordotonal organ CO J2.J3) provides information about movement and angular position of these two joints. Four categories of static sensory neurones were identified. The specific neurones are selectively sensitive to either the J2 position or the J3 position. Homo-directional neurones code J2- and J3-flexed positions or J2- and J3-extended positions. Hetero-directional neurones code the position of each of the two joints in opposite ways, increasing and then decreasing their activity when J3 and J2 are successively flexed. The origin of these different kinds of static response is discussed with regard to the morphology and mechanical properties of the chordotonal organ and to the distribution of the bipolar sensory neurones on the elastic sheet which forms this proprioceptor. Its functional properties are briefly discussed with regard to the contribution of the CO J2.J3 to reflex actions. The sensitivity of this receptor is compared to that of joint receptors in other species.

Animals↗
PubMed1980

[Angiography in pre- and post-operative diagnosis of paediatric portal hypertension (author's transl)].

The authors report 31 cases of portal hypertension in childhood, including pre- and post-operative angiographic studies of 13 shunt operations. Preoperative angiography serve both to define the origin of the hypertension and to visualize compensatory collateral circulation. Postoperative angiography permits evaluation of the efficiency of the shunt, based on patency of anastomosis and reduction of collaterals, and has proved to be safe even when repeated or in emergency conditions.

Angiography↗
PubMed1979

Twin azygotic test for the study of hereditary qualitative traits in twin populations.

Following previous formulations of a model of qualitative analysis of twin population data independent of zygosity, a new Bayesian approach has been developed. The present model can be applied to any qualitative genetic trait in twin population data, provided no specific source of variation be introduced by the twin condition, and allows not only estimation of the frequencies of mono- and dizygosity as well as the gene frequencies, but also verification of the trait's mode of inheritance.

Bayes Theorem↗
PubMed1979

Equilibrium stability of a diffusion process in population genetics.

De Finetti introduced a model of a continuously reproducing population with phenotypic assortative mating for a pair of dominant-recessive autosomal genes. In this paper it is rigorously proved that this model admits of stable equilibria which lie above the Hardy--Weinberg parabola in the de Finetti diagram.

Genetics, Population↗
PubMed1979

Action of cinnarizine on the hyperviscosity of blood in patients with peripheral obliterative arterial disease.

Cinnarizine, a drug capable of improving blood flow, was studied for its action on blood viscosity and its main components in patients affected by peripheral obliterative arterial diseases (POAD). Both acute and chronic administration of the drug diminished the increased whole-blood viscosity in patients, without affecting plasma and serum viscosity, hematocrit, plasma fibrinogen concentration, and plasma osmolality. Since cinnarizine also led to a significant increase of peripheral muscular blood flow, it was hypothesized that this action may be due to an increased deformability of the red cells, and may play a considerable role in the therapeutic approach to POAD.

Arterial Occlusive Diseases↗
PubMed1979

[Role of angiography in studying posttraumatic abdominal masses in pediatric patients].

In infancy and neonatal period, post-traumatic space-occupying masses often can be associated to malignant, clinically not identified, lesions. Radiodiagnostic non-invasive techniques cannot, in many cases, demonstrate extension, nature and localization of such a lesion, when angiography, in personal experience, shows quite even malignancy and extension without false negatives, and is essential, in our opinion, for evaluation of therapeutic policy and follow-up.

Abdominal Injuries↗
PubMed1978

Coordination behaviour of antithyroid drugs against the Fe(I)(NO)2 group in solution: ESR and FT-NMR study.

The binding sites of some types of antithyroid drugs in the presence of the Fe(I)(NO)2 paramagnetic probe were investigated. Coordination behaviour in solution of different structured ligands was determined by means of ESR parameters and 13C FT-NMR spectra. Selective isotopic substitution with 15NO combined with computer simultation was used to elucidate overlapping ESR patterns. A correlation between chemical structure and antithyroid activity of the pharmacological bases is suggested.

Aniline Compounds↗
PubMed1977

Genetic selection and equilibrium stability.

The problem of the equilibrium stability of a phenotypic selection process, with a single pair of autosomal alleles, has been numerically studied, on the basis of previously established reproduction differential equations.

Alleles↗