A system for the acquisition and digital analysis of lower limb flow waveforms

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dc.contributor.advisorCapper, Wayne Len_ZA
dc.contributor.advisorBunn, Anthony Een_ZA
dc.contributor.advisorImmelman, E Jen_ZA
dc.contributor.authorSmith, Leonarden_ZA
dc.date.accessioned2018-01-29T07:13:54Z
dc.date.available2018-01-29T07:13:54Z
dc.date.issued1994en_ZA
dc.description.abstractA PC based waveform acquisition and analysis system has been developed for use in aorta-iliac arterial assessment. A Motorola DSP56001 based system containing dual Analog to Digital converters is used to sample phase quadrature demodulated signals from a commercially available continuous wave Doppler unit. The Power Spectral Density is calculated using an autoregressive model from which the mean velocity waveform is calculated. This waveform is used to calculate the damping factor, vessel compliance and runoff resistance of a simple electrical model of the lower limb arterial circulation using a non-linear regression technique of curve fitting in the time domain. A pilot study using the system shows a significant separation (p < 0.001 Mann Whitney U-test) between the damping factors of a normal control group (quartile range = 0. 15 - 0.25 ; median = 0. 19) and a patient group with angiographically determined aorta-iliac arterial disease (quartile range = 0.45 - 0.89 ; median= 0.49).en_ZA
dc.identifier.apacitationSmith, L. (1994). <i>A system for the acquisition and digital analysis of lower limb flow waveforms</i>. (Thesis). University of Cape Town ,Faculty of Health Sciences ,Division of Biomedical Engineering. Retrieved from http://hdl.handle.net/11427/27049en_ZA
dc.identifier.chicagocitationSmith, Leonard. <i>"A system for the acquisition and digital analysis of lower limb flow waveforms."</i> Thesis., University of Cape Town ,Faculty of Health Sciences ,Division of Biomedical Engineering, 1994. http://hdl.handle.net/11427/27049en_ZA
dc.identifier.citationSmith, L. 1994. A system for the acquisition and digital analysis of lower limb flow waveforms. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Smith, Leonard AB - A PC based waveform acquisition and analysis system has been developed for use in aorta-iliac arterial assessment. A Motorola DSP56001 based system containing dual Analog to Digital converters is used to sample phase quadrature demodulated signals from a commercially available continuous wave Doppler unit. The Power Spectral Density is calculated using an autoregressive model from which the mean velocity waveform is calculated. This waveform is used to calculate the damping factor, vessel compliance and runoff resistance of a simple electrical model of the lower limb arterial circulation using a non-linear regression technique of curve fitting in the time domain. A pilot study using the system shows a significant separation (p < 0.001 Mann Whitney U-test) between the damping factors of a normal control group (quartile range = 0. 15 - 0.25 ; median = 0. 19) and a patient group with angiographically determined aorta-iliac arterial disease (quartile range = 0.45 - 0.89 ; median= 0.49). DA - 1994 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1994 T1 - A system for the acquisition and digital analysis of lower limb flow waveforms TI - A system for the acquisition and digital analysis of lower limb flow waveforms UR - http://hdl.handle.net/11427/27049 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/27049
dc.identifier.vancouvercitationSmith L. A system for the acquisition and digital analysis of lower limb flow waveforms. [Thesis]. University of Cape Town ,Faculty of Health Sciences ,Division of Biomedical Engineering, 1994 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/27049en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDivision of Biomedical Engineeringen_ZA
dc.publisher.facultyFaculty of Health Sciencesen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherBiomedical Engineeringen_ZA
dc.subject.otherBlood Flow Velocity - instrumentationen_ZA
dc.subject.otherLeg - blood supplyen_ZA
dc.titleA system for the acquisition and digital analysis of lower limb flow waveformsen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMSc (Med)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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