Ma.J. Oliveras López

University of Granada, Granada, Andalusia, Spain

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Publications (6)8.11 Total impact

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    ABSTRACT: Current high survival in hemodialysis patients (52% at 5 years) have made the chronic manifestations to emerge such as the high hyponutrition prevalence of these patients, as well as the importance of the nutritional status in their morbimortality. The reason for protein-caloric hyponutrition is multifactorial, although chronic inflammatory conditions associated to the dialysis technique are becoming more and more relevant. The variations in several nutritional biochemical parameters (total proteins, plasma albumin, transferrin, and total cholesterol) have been assessed in 73 hemodialysis patients for one year. The mean age of the patients was 53.3 +/- 18.69 years (43 males and 30 females). The average on hemodialysis program was 43 +/- 33 months, with a mean session duration of 246 +/- 24 minutes, and mean hemodialysis dose administered of 1.37 +/- 0.27 (KT/V) (second generation Daurgidas). A decrease in all the biochemical parameters assessed has been observed, with statistically significant differences: total proteins (p < 0.001), albumin (p < 0.00001), total cholesterol (p < 0.05), and transferrin (p < 0.01). The evolution of the nutritional biochemical parameters assessed showed an important nutritional deterioration of the patients remaining stable with the therapy.
    Nutricion hospitalaria: organo oficial de la Sociedad Espanola de Nutricion Parenteral y Enteral 01/2008; 23(2):119-25. · 1.04 Impact Factor
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    ABSTRACT: Hemodialysis patients present an increase in plasma homocysteine (Hcy) due to methylation impairment caused by uremia and the deficiency of the co-factors needed (vitamin B, folic acid). This correlates with a more common development of premature vascular disease. There is no consensus on the therapy, with a poor response to oral administration of conventional doses of folic acid. In this work, we assessed the response of hyperhomocysteinemia in 73 regular hemodialysis patients after the administration of 50 mg of parenteral folinic acid for 18 months. Plasma homocysteine of the patients at the time of the study beginning presented mean values of 22.67 (micromol/L). During the first year of supplementation the mean value was kept at 20 micromol/L. From the first year to the end of the 18-months observation period the mean homocysteine levels were 19.58 micromol/L. Although we found a clear trend towards a decrease in plasma homocysteine levels during the treatment period, there were no significant differences. Homocysteine levels did not come back to normal in none of the patients treated.
    Nutricion hospitalaria: organo oficial de la Sociedad Espanola de Nutricion Parenteral y Enteral 01/2008; 23(3):268-76. · 1.04 Impact Factor
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    ABSTRACT: Chronic renal failure is commonly related to hyponutrition, affecting approximately on third of patients with advanced renal failure. We carried out a longitudinal study to assess nutritional evolution of 73 patients on a regular hemodialysis program, assessing changes in the anthropometrical parameter body mass index (BMI) and its correspondence to biochemical nutritional parameters such as total protein (TP) levels and serum albumin (Alb). Every three months plasma TP and albumin levels were collected and BMI was calculated by the standard formula: post-dialysis weight in kg/height in m2. For classifying by BMI categories, overweight and low weight were defined according to the WHO Expert Committee. Studied patients had a mean age of 53 years, 43 were male and 30 were female patients. BMI in women was lower than that in men (p < 0.001), as well as TP (p < 0.001) and Alb (p < 0.001) levels. Mean BMI was 29.3 kg/m2. Three point two percent of the determinations showed low weight, 12.16% overweight, and 83.97% normal BMI. TP were normal in 90.76% and decreased in 9.24%. Alb was normal in 82.2% and low in 17.78%. After the follow-up time (21.6 months, minimum 18 months, maximum 53 months), the Kruskal-Wallis test did not show a statistically significant change for BMI but it did show a change for the biochemical parameters albumin and total proteins (p < 0.05): nutritional impairment in CRF patients is manifested on biochemical parameters (TP and Alb) with no reflection on anthropometrical data.
    Nutricion hospitalaria: organo oficial de la Sociedad Espanola de Nutricion Parenteral y Enteral 03/2006; 21(2):155-62. · 1.04 Impact Factor
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    ABSTRACT: The aim of this work was to assess nutritional status in Muslim population, bigger and bigger in our universities, in a period during which its dietary habits change considerably. The study has been performed in a population of Muslim students from the University of Granada, and has been compared to a non-Muslim population within the same setting. Study subjects undertook a questionnaire in which they reported the diet consumed each day during the Ramadan period. Macronutrient analysis for such diet was performed with Dietsource software. On the other hand, anthropometrical parameters were taken before and after the study period to observe their change and obtain conclusions on nutritional status. It has been observed that lipid intake of Muslims during the Ramadan period was excessive (48% of total energy), by decreasing hydrocarbons and particularly proteins. This is highlighted by means of the anthropometrical study, observing a decrease in measurements such as muscular area of the arm, the arm area, the muscle perimeter of the arm, and weight, with an increase in arm fat, perimeter of the arm, leg and mid-ieg circumference in the Muslim group, which are in contrast with parameters in the non-Muslim group. From our results, we may stress that during the Ramadan period macronutrient intake values are not appropriate as compared to standard recommendations in Spain. Besides, it is striking to observe how anthropometrical measurements related to fat increase whereas those related to muscular mass decrease.
    Nutricion hospitalaria: organo oficial de la Sociedad Espanola de Nutricion Parenteral y Enteral 01/2006; 21(3):313-6. · 1.04 Impact Factor
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    ABSTRACT: In this work, we have planned to perform a nutritional assessment of a group of 50 students from the University of Granada, to which questionnaires have been administered relating to 24-hour remembrance of type and frequency of food consumption, for 30 days. In order to know macro- and micronutrients intake, the results have been analyzed with DietSource software. At the same time, anthropometrical measurements have been taken to verify their possible change during the study period. We have been able to observe a protein intake slightly higher than the recommended intake, similarly to what occurs with lipids. The studied group positively values menus with high content in meat, whereas deficiencies in fruit and vegetable intake are observed. In addition, there is a variation of anthropometrical measurements of these individuals during the study period. We also noticed a deficiency in some micronutrients such as iron, zinc, calcium, iodine, cupper, selenium, vitamin E, and folic acid in all the studied population. However, vitamin C and thiamine levels in both groups and riboflavin levels in women may be considered adequate. From these results, we may highlight a nutrition unbalance in this population group since we have observed some deficiencies in the intake of important micronutrients for health maintenance and promotion, and macronutrient consumption that diverges from the established recommendations.
    Nutricion hospitalaria: organo oficial de la Sociedad Espanola de Nutricion Parenteral y Enteral 01/2006; 21(2):179-83. · 1.04 Impact Factor
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    ABSTRACT: Artificial aging techniques were applied to samples of rum. These samples were then compared, by artificial neural nets, with traditionally aged rums. Analysis was based on the phenolic and furanic composition of each sample. There were found to be few statistical differences between samples, thus confirming the possibility of applying artificial aging techniques to obtain rum with phenolic and furanic characteristics that are similar to those of rum obtained by traditional methods.
    Journal of Agricultural and Food Chemistry 04/2002; 50(6):1470-7. DOI:10.1021/jf010889i · 2.91 Impact Factor