Impedance plethysmography; a physical analysis for quantitative blood flow studies

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dc.contributor.committeeMemberAllred, John C.
dc.creatorMillar, Huntly Drummond
dc.date.accessioned2022-07-01T17:05:14Z
dc.date.available2022-07-01T17:05:14Z
dc.date.copyright1957
dc.date.issued1957
dc.description.abstractPlethysmography, or volume recording, plays an important part in the evaluation of circulation in human patients. There are several techniques used: indirect mechanical methods involving fluid displacement; indirect photoelectric methods involving transmission and/or reflection of light; indirect electrical methods Involving the correlation of impedance changes with blood volume changes. The impedance plethysmograph is evaluated in this paper with respect to carrier frequency and electrode characteristics. A comparison is made between measured results and values predicted on the basis of physical analyses of tissue impedance. It is shown that volume variations may be reproduced by direct air volume displacement measurements and by impedance measurements at frequencies of 100, and 175 kilo-cycles per second. Special techniques and calculations are demonstrated whereby the impedance plethysmograph may be used for quantitative measurement of blood flow rates, pulse volumes, elasticity of vessels and circulation times.
dc.description.departmentPhysics, Department of
dc.format.digitalOriginreformatted digital
dc.format.mimetypeapplication/pdf
dc.identifier.other13695820
dc.identifier.urihttps://hdl.handle.net/10657/10298
dc.language.isoen
dc.rightsThis item is protected by copyright but is made available here under a claim of fair use (17 U.S.C. Section 107) for non-profit research and educational purposes. Users of this work assume the responsibility for determining copyright status prior to reusing, publishing, or reproducing this item for purposes other than what is allowed by fair use or other copyright exemptions. Any reuse of this item in excess of fair use or other copyright exemptions requires express permission of the copyright holder.
dc.titleImpedance plethysmography; a physical analysis for quantitative blood flow studies
dc.type.dcmiText
dc.type.genreThesis
dcterms.accessRightsThe full text of this item is not available at this time because it contains documents that are presumed to be under copyright and are accessible only to users who have an active CougarNet ID. This item will continue to be made available through interlibrary loan.
thesis.degree.collegeCollege of Arts and Sciences
thesis.degree.departmentPhysics, Department of
thesis.degree.disciplinePhysics
thesis.degree.grantorUniversity of Houston
thesis.degree.levelMasters
thesis.degree.nameMaster of Science

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