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Biomedical subjects

F Trujillo

Publications and source records attributed to F Trujillo.

31 records · Page 2Linked to original sources
PubMed1984

[Non-linear analysis of arterial pressure].

A macroscopic nonlinear mathematical model of simulation of the different mechanisms that participate at long, medium and short term in the arterial pressure regulation is described. In order to establish the availability and usefulness of this model two types of conditions were simulated. The first ones were compared to the results obtained in live experiments in dogs and the other ones were referred to the data from clinical research. This model makes possible both the qualitative and quantitative appreciation of the sequence of physiological events whenever a disturbance modifies the normal conditions in the control of the arterial pressure. This model is easy to handle in both clinical and experimental applications since it does not require the knowledge of computer handling for its operation.

Animals↗
PubMed1981

[Influence of posture changes on oncotic pressure and RHE proteinaemia (author's transl)].

Variations in proteinaemia levels in healthy man from posture changes or from physical exercise, as well as their chemical and physical consequences in plasma colloid-osmotic pressure, have been studied. Proteinaemia and oncotic pressure were measured in ten young males while lying flat, walking about, standing up motionless at attention and once again in a lying flat position. Proteinaemia and oncotic pressure increased on changing from a lying posture to orthostatism. The increase was much greater when the subjects were kept at rigid attention. Walking about did not produce any significant changes independently of the time factor. A significant correlation between changes in oncotic pressure and proteinaemia was always present. Changes in the oncotic pressure, however, were statistically more important.

Adult↗
PubMedDate not supplied

[Dose-effect of the administration of ferrous fumarate in aged persons with iron deficiency].

BACKGROUND: Anemia is the most prevalent hematological problem in elderly persons, affecting 14% of the males and 6% of the females of the population over 60 years of age in Mexico City. OBJECTIVE: To determine the effect produced by the prolonged administration of ferrous fumarate in elderly persons with iron deficiency. METHOD: In a population of 178 subjects, aged between 65 to 100 years, iron deficiency was diagnosed in 51 (28.6%), who had serum iron concentrations below 80 micrograms/dL for men and 60 micrograms/dL for women, but only 21 patients (11.8%), accepted to participated in the study. The response to a 6 months oral administration of ferrous fumarate were studied with a daily oral dose of 5 mg/kg of elemental iron. The patients were classified in 3 groups according to the abnormal parameters of iron metabolism (group 1 = 10.9% anemia, group 2 = 28.0% and group 3 = 63.0% anemia). RESULTS: The efficacy of treatment was evaluated by quantification of the changes occurred in serum iron concentrations, hemoglobin, ferritin and transferrin saturation index, at 0, 30, 90 and 180 days of treatment. This study showed that the treatment of oral ferrous fumarate in elderly patients with iron deficiency, produces a quantifiable improvement in measures of iron parameters within 6 months. CONCLUSIONS: The results of this study suggest the usefulness of prolonged treatment with ferrous fumarate in elderly patients with iron deficiency, to avoid therapeutic failure as a consequence of non-compliance as is common in elderly patients.

Age Factors↗
PubMedDate not supplied

Diastasis of the maxillary bone: an unusual complication of transsphenoidal surgery.

Diastasis of the intermaxillary suture is an unusual complication of the transsphenoidal approach to the sella turcica. Over the 1977-1989 twelve-year-period, 192 procedures were performed at our Center. This complication occurred only once, in a senile patient with marked osteoporosis. It did not alter the course of the operation, nor did it create additional problems during the postoperative period.

Adenoma↗
PubMedDate not supplied

[Infections caused by enteropathogenic Escherichia coli].

Escherichia coli strains currently recognized to cause human diarrhea can be distinguished on the basis of pathogenic mechanism and separated into five categories: enterotoxigenic (ETEC), enteroinvasive (EIEC), enterohemorrhagic (EHEC), enteroaggregative (EAggEC) and enteropathogenic (EPEC). EPEC is a bacterial pathogen that causes diarrhea in infants, particularly in developing countries. The purpose of this review is to summarize recent advances in the understanding of EPEC pathogenesis and the contribution of Mexican investigators to the knowledge of this pathogen.

Bacterial Vaccines↗