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Biomedical subjects

F Rogers

Publications and source records attributed to F Rogers.

28 records · Page 2Linked to original sources
PubMed1986

Effects of low- and high-intensity home-based exercise training on functional capacity in healthy middle-aged men.

The effects of 12 weeks of home-based exercise training on peak oxygen consumption (VO2 max) in healthy sedentary middle-aged men, mean age 49 +/- 6 years, were evaluated. Twenty-one men trained at low intensity, 23 trained at high intensity and 20 were control subjects. Individually prescribed low- and high-intensity training was performed 5 times per week within a range of 42 to 60% and 63 to 81% of baseline VO2 max, corresponding to average heart rates of 102 to 122 and 128 to 148 beats/min, respectively. Caloric expenditure per training session approximated 350 kcal in both groups; adherence was at least 90% in both groups. VO2 max increased 8% in patients who trained at low intensity, 17% in those who trained at high intensity (both p less than 0.001), and not at all in control subjects. Low-intensity exercise training at home significantly augments functional capacity in healthy sedentary middle-aged men.

Adult↗
PubMed1985

Alterations of capillary flow during sepsis.

Normal red cells are flexible and can thus negotiate small capillaries with ease. Impaired red cell deformability (RCD) has been found in patients with uremia, peripheral vascular disease, and diabetes. This study was performed in order to determine if impaired RCD is present during sepsis. The RCD of citrated whole blood (WB) and citrated buffy coat-poor whole blood (BCP) from ten septic patients was compared to ten age-, sex-, and race-matched control patients. The samples were passed through polycarbonate 5 micron pore filters at -10 cm H2O pressure according to the technique of Reid. A red cell deformability index was calculated for each patient by multiplying the volume of blood flowing through the apparatus in a 1-minute period by the hematocrit. The results show very highly significant decreases of flow in both the WB and BCP blood in the septic group. Alterations in flow in the WB can be explained on the basis of changes in the buffy coat fraction and/or the red cell deformability. A decrease in flow in the BCP blood can be explained in terms of a diminished deformability of the red cells themselves. This increased rigidity of the red cells could, in part, explain the AV shunting and decreased microcirculatory flow seen in the septic state.

Capillaries↗
PubMed1975

Evaluation of an indirect hemagglutination test for the diagnosis of human leptospirosis.

A presumptive hemagglutination test for the serological diagnosis of leptospirosis in humans is described. The antigen was prepared from a soluble alcohol extract of an andamana strain sorbed to human O-negative erythrocytes and preserved by pyruvic aldehyde fixation. In this study, the overall sensitivity of the hemagglutination test was 92% in contrast to 69% for the presumptive slide agglutination test. The specificity was 95% for the hemagglutination test in comparison with 83% for the slide test.

Agglutination Tests↗