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Träfflista för sökning "WFRF:(Steen B.) srt2:(1980-1989)"

Sökning: WFRF:(Steen B.) > (1980-1989)

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1.
  • Steen, B., et al. (författare)
  • Body composition in the elderly estimated with an electrical impedance method.
  • 1987
  • Ingår i: Comprehensive gerontology. Section A, Clinical and laboratory sciences. - 0902-0071. ; 1:3, s. 102-105
  • Tidskriftsartikel (refereegranskat)abstract
    • The purpose of the present study was to test the reliability and validity of a new electrical impedance method for estimating body composition in 35 healthy persons and patients in different sex and age groups, and to obtain basal data on the size of different body composition compartments in elderly individuals in health and disease. The reliability studies showed no significant differences with the new method in intraindividual comparisons before and after changing the positions of the electrodes, drinking of water, and overnight fasting, as well as at a double estimation on 2 consecutive days. The results with this method are compared to results from measurements of total body potassium and total body water, and from a four-compartment model technique using total body potassium and total body water. We conclude that the method has an acceptable reliability and validity and should be of great value not only in field studies but also in clinical practice. Data on body composition with the electrical impedance method are obtained from 147 individuals in different groups, namely healthy females, 80-81-year-old males, female patients from a nursing home, and patients of both sexes from a day care unit.
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3.
  • Lundberg, Johan, et al. (författare)
  • Direct evidence of active sympathetic vasodilatation in the skin of the human foot
  • 1989
  • Ingår i: Journal of Physiology. - 1469-7793. ; 417, s. 437-446
  • Tidskriftsartikel (refereegranskat)abstract
    • 1. During operative aorto-femoral vascular reconstructions on sixteen patients, the sympathetic chain was stimulated electrically between the L2 and L4 ganglia while blood flow was monitored by laser doppler flowmeters from the skin on the sole of the foot and the ankle and by an electromagnetic flowmeter from the deep femoral artery. Epidural anaesthesia to at least the T6 level was used which excluded reflex effects. 2. Stimulation (10 Hz) at 1-12 mA current strengths for 30 s evoked both reductions and increases of blood flow in glabrous and hairy skin. Initial short-lasting flow increases (durations 9-19 s) followed by sustained decreases were common: sometimes there were sustained flow increases at low and decreases at high current strengths. 3. In the deep femoral artery (supplying predominantly muscle) only flow reductions were evoked. 4. The results provide evidence for sympathetically mediated vasodilatation in the skin of the human foot whereas leg muscles may be supplied by vasoconstrictor nerves only.
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