{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/54841"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/54841","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"The development of a continuous blood oxygen saturation measuring and control system","abstract":"An instrument is described which continuously monitors and controls the blood oxygen saturation at the outlet of a membrane-type oxygenator. A reflection oximeter was developed which employs the ratio of the incident light intensity at two wavelengths to obtain the continuous blood oxygen saturation measurement. The ratio of the intensities of incident light at the two wavelengths is linearly related to the oxygen saturation, provided the reflected light intensities at these two wavelengths are held constant. The continuous oxygen saturation measurement from the oximeter is compared to a preselected oxygen saturation value by the instrument. The difference between the actual and the desired oxygen saturation is used to change the oxygen partial pressure gradient in the oxygenator in such a way that the oxygenator outlet saturation approaches the preselected value. A detailed description of the instrument's design is presented along with data obtained from the instrument's operation.","abstract_html":"An instrument is described which continuously monitors and controls the blood oxygen saturation at the outlet of a membrane-type oxygenator. A reflection oximeter was developed which employs the ratio of the incident light intensity at two wavelengths to obtain the continuous blood oxygen saturation measurement. The ratio of the intensities of incident light at the two wavelengths is linearly related to the oxygen saturation, provided the reflected light intensities at these two wavelengths are held constant. The continuous oxygen saturation measurement from the oximeter is compared to a preselected oxygen saturation value by the instrument. The difference between the actual and the desired oxygen saturation is used to change the oxygen partial pressure gradient in the oxygenator in such a way that the oxygenator outlet saturation approaches the preselected value. A detailed description of the instrument's design is presented along with data obtained from the instrument's operation.","abstract_has_math":false,"creators":["Cavender, Ralston Ray"],"institution":"Virginia Polytechnic Institute and State University","degree_name":"Master of Science","degree_level":"masters","degree_discipline":"Mechanical Engineering","degree_department":"Mechanical Engineering","school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1974,"date_issued":"1974","date_published":"1974","updated_at":"2026-07-22T22:18:39Z","subjects":[],"languages":["en"],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10919/54841","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.department","label":"Department","values":["Mechanical Engineering"]},{"key":"dc:creator","label":"Author","values":["Cavender, Ralston Ray"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2015-07-28T20:42:13Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2015-07-28T20:42:13Z"]},{"key":"dc:date.issued","label":"Date","values":["1974"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Polytechnic Institute and State University"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.dcmitype","label":"Dc Type Dcmitype","values":["Text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Mechanical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Virginia Polytechnic Institute and State University"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["In Copyright"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10919/54841"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["An instrument is described which continuously monitors and controls the blood oxygen saturation at the outlet of a membrane-type oxygenator. A reflection oximeter was developed which employs the ratio of the incident light intensity at two wavelengths to obtain the continuous blood oxygen saturation measurement. The ratio of the intensities of incident light at the two wavelengths is linearly related to the oxygen saturation, provided the reflected light intensities at these two wavelengths are held constant. The continuous oxygen saturation measurement from the oximeter is compared to a preselected oxygen saturation value by the instrument. The difference between the actual and the desired oxygen saturation is used to change the oxygen partial pressure gradient in the oxygenator in such a way that the oxygenator outlet saturation approaches the preselected value. A detailed description of the instrument's design is presented along with data obtained from the instrument's operation."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["The development of a continuous blood oxygen saturation measuring and control system"]}]}],"canonical_facts":{"dc:contributor.department":["Mechanical Engineering"],"dc:creator":["Cavender, Ralston Ray"],"dc:date.accessioned":["2015-07-28T20:42:13Z"],"dc:date.available":["2015-07-28T20:42:13Z"],"dc:date.issued":["1974"],"dc:description.abstract":["An instrument is described which continuously monitors and controls the blood oxygen saturation at the outlet of a membrane-type oxygenator. A reflection oximeter was developed which employs the ratio of the incident light intensity at two wavelengths to obtain the continuous blood oxygen saturation measurement. The ratio of the intensities of incident light at the two wavelengths is linearly related to the oxygen saturation, provided the reflected light intensities at these two wavelengths are held constant. The continuous oxygen saturation measurement from the oximeter is compared to a preselected oxygen saturation value by the instrument. The difference between the actual and the desired oxygen saturation is used to change the oxygen partial pressure gradient in the oxygenator in such a way that the oxygenator outlet saturation approaches the preselected value. 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