927 resultados para HARMONIC IMPEDANCE


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"Contract AT(30-1)-2789."

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"Prepared for the Air Force Ballistic Missile Division, Headquarters Air Research and Development Command, under Contract AF 04(647)-309, Thermonuclear Propulsion Research."

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"Materials Laboratory, Contract no. AF 33(616)-5426, Project no. 7360."

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Reprinted from the Proceedings of the Royal Society of Edinburgh, session 1905-1906, v. 76, pt. 4.

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Mode of access: Internet.

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Title within double ruled border; text within single rule border on every page, with double rule at top and bottom of page. The texts are arranged in six columns, along two pages.

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"Notes and references": p. 168-172.

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Thesis (Master's)--University of Washington, 2016-06

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Cerebral electrical impedance is useful for the detection of cerebral edema following hypoxia in newborn infants. Thus it may be useful for determining neurological outcome or monitoring treatment. Hypothermia is a promising new therapy currently undergoing trials, but will alter impedance measurements. This study aimed to define the relationship between temperature and both cerebral and whole body electrical impedance, and to derive correction factors for adjustment of impedance measurements during hypothermia. In eight anaesthetized 1-2 day old piglets rectal, tympanic and scalp temperatures were monitored continuously. Following baseline readings at a rectal temperature of 39degreesC, piglets were cooled to 32degreesC. Four piglets were re-warmed. Cerebral and whole body impedance were measured at each 0.5degreesC as rectal temperature decreased. There was a strong linear relationship between both cerebral and whole body impedance and each of the temperatures measured. There was no difference in the relationship between impedance and rectal, tympanic or scalp temperatures. The relationship for impedance and rectal temperature was the same during cooling and re-warming. Using the correction factors derived it will be possible to accurately monitor cerebral and whole body fluid distribution during hypothermic treatment.