Computerized renocystography for quantitative filtration-extraction.
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Biomedical subjects
Publications and source records attributed to S Górski.
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Electroneurographic and thermographic investigations were done in 32 persons. Sensory nerve conduction velocity, amplitude of sensory nerve potential, subjective and objective sensory thresholds were determined during stimulation of each finger. The maximal and minimal skin temperatures for each finger were evaluated from thermograms taken from the dorsal and palmar surface of the hand before and after standard cooling test. The measurements were done in a thermostabilised room at 19-21 degrees C effective ambient temperature. The second degree correlations between the electroneurographic and thermographic parameters were calculated. The statistical analysis revealed the presence of a double correlation pattern depending on the homoiothermic or poikilothermic thermoregulatory ability of the finger. The differentiation threshold criterion for the poikilo- and homoiothermic group assignment was the minimal rest temperature of the finger equal to 28 degrees C. The correlations in the poikilothermic fingers were very strong and much stronger than in the homoiothermic fingers. Correlations with temperatures were strong both at rest as well as after cooling. Correlations for the sensory nerve potential amplitude likewise for the objective and subjective thresholds were stronger than for the conduction velocity. Sensory nerve potential amplitude increases and subjective and objective thresholds decrease with finger temperature. The obtained results suggest that sensory nerve conduction is related not only to the actual tissue temperature but also to local thermoregulatory ability.
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Contactant thermometry of fingers' skin in thermal functional test is a routine examination common now in vascular changes diagnosis. The sensitivity of this test is increased by the use of a linear thermograph, averaging the temperature of the skin area being examined. In order to ensure correct measurement results, conditions and principles of the test performance must be observed carefully, as indicated by the authors. Evaluation of time thermograms of fingers' skin should involve three types of thermoregulating reaction: homoiothermic, poikilothermic and amphithermic. The first type may be numbered among absolute, whereas the other two among relative physiological standards. Evaluation should include: fingers' skin temperature before cooling, the rate of temperature rise between the 1st and the 5th minute after cooling and the temperature taken at the 15th minute after cooling. Repeated measurements allow to differentiate changes in fingers' skin temperature, resulting from a damage to vessels due to vibration, as well as a relative physiological standard.
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