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Biomedical subjects

F Pfeffer

Publications and source records attributed to F Pfeffer.

46 records · Page 3Linked to original sources
PubMed1991

Incidence of premature rupture of membranes in pregnant women with low leukocyte levels of vitamin C.

The present study was undertaken to explore the association between vitamin C nutritional status in pregnant women with premature rupture of the chorioamniotic membranes (PRM). A case-control cross-sectional study was carried out in 10 women with PRM and 19 women without PRM. The women were evaluated in the first hours postpartum while hospitalized: 10 ml of blood were obtained from each woman to determine vitamin C expressed as micrograms/10(8) leucocytes or microgram/mg of leucocyte protein. Data on fruit and vegetable consumption was collected by a frequency dietary survey and the hospital clinical records were reviewed to obtain their obstetric history and data on the presence of infection during pregnancy, in placenta and/or in fetal membranes. Low vitamin C levels were considered at a cut-off point equal or less than 26.33 micrograms/10(8) leucocytic cells and 3.15 micrograms/mg leucocyte protein. An association was found between low vitamin C levels and cases with PRM. No difference was found in the frequency of consumption of fruit and vegetables between the two groups. Infections were more frequently found in the PRM group, when the women had low levels of vitamin C, and when both risk factors were present simultaneously the proportion of PRM cases identified was greater than 0.75.

Adult↗
PubMed1988

[Evaluating 2 simple procedures for ultrasound assessment of gastric emptying].

For evaluation of 2 simple methods gastric emptying was studied simultaneously by ultrasound and scintigraphy. In 12 patients (25-76 years-old) gastric emptying was quantified by scintigraphy after ingestion of 300 ml Tc-99m-labelled orange juice; simultaneously, the region of the gastric antrum was measured in 5-minute intervals in the aortic longitudinal section. In the following day gastric emptying was studied after ingestion of the identical volume of orange juice by planimetry of the maximal gastric area in an anatomical long-axis section in dextro-decline position. By linear regression analysis a significant correlation coefficient (r = 0.83, p less than 0.001) was obtained between the results of the sonographic antrum method and scintigraphy and between scintigraphy and the sonographic dextro-decline method (r = 0.83, p less than 0.001). These results imply that gastric emptying of fluids can be quantified by both simple sonographic methods. The sonographic dextro-decline method is less influenced by air and hence easier to perform.

Adult↗
PubMedDate not supplied

[Serum retinol in urban Mexican women during the perinatal period].

OBJECTIVE: To establish the prevalence of vitamin A deficiency during pregnancy and lactation in a group of urban Mexican women. MATERIAL AND METHODS: A group of pregnant women who attended a prenatal care program were invited to participate. Subjects had no added pathologies and were less than 20 weeks pregnant. Evaluations were performed 3 times during pregnancy until 24 weeks post-partum. Vitamin A levels were determined in serum by high performance liquid chromatography (HPLC). The cut-off point to consider retinol deficiency was < 1.05 mumol/L. RESULTS: During the 3 gestational evaluations, vitamin A levels were 2.34 +/- 0.70, 2.41 +/- 1.03 and 1.86 +/- 0.66 mumol/L, respectively, which shows a significant decrease. However, only 1/30 was situated below the accepted cut-off point to consider risk of deficiency, and none for deficiency. During post-partum, concentrations remained relatively constant, approximately 2.10 mumol/L. Lactation had no impact on serum retinol levels, while weight loss did. CONCLUSIONS: No cases of vitamin A deficiency were found in the studied population during the perinatal period. Maternal weight loss affects post-partum retinol levels.

Adult↗
PubMedDate not supplied

[Smoking, consumption of alcoholic beverages and coffee as factors associated with the development of cancer of the pancreas].

The purpose of this study was to evaluate retrospectively the role of alcohol intake, smoking and coffee consumption as risk factors in the development of cancer of the pancreas. Twenty nine cases with pancreatic cancer and 29 controls matched by sex, socioeconomic status and age were evaluated. Information on alcohol, tobacco and coffee consumption was obtained by specially designed questionnaires. Odds ratios were calculated and analyzed by chi square testing. The combination of the 3 factors gave an odds ratio of 26.3, whereas alcohol and coffee consumption gave an odds ratio of 13.9. Considered independently, only alcohol and coffee consumption were found to be significantly associated with cancer of the pancreas.

Adult↗