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A Non-Contact Electrode for Measurement of Electrocardiography

Tao, Quan/Q A Non-Contact Electrode for Measurement of Electrocardiography. Master's Thesis, University of Pittsburgh.

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    Abstract

    Heart disease has become a widespread epidemic threatening the health of millions of Americans and costing billions of dollars in therapy. In heart disease treatment, an effective heart monitoring technique is desired. In this thesis, a novel non-contact electrode was designed and fabricated to measure electrocardiography (ECG) based on widely used spherical volume conductor model. This model has been demonstrated to have a closed-form solution, which enables measurement of electric potential with capacitive electrode. Finite element analysis performed in Ansoft Maxwell software showed the feasibility of using an X-antenna to represent the ideal current dipole. The capacitive electrode we designed consists of two small sensing electrodes and a large reference electrode. This electrode measured promising signals for both direct and non-contact tests on spherical volume conductor model. Experiments were performed to find the best orientation and location for the electrode to measure the most significant signals on the surface of the sphere. Our electrode can also showed positive results in realizing both direct and non-contact measurement of the real ECG signals.

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    Details

    Item Type: University of Pittsburgh ETD
    ETD Committee:
    ETD Committee TypeCommittee MemberEmail
    Committee ChairSun, Mingui/Mdrsun@pitt.edu
    Committee MemberLi, Guangyong/Ggul6@pitt.edu
    Committee MemberMao, Zhihong/Zzhm4@pitt.edu
    Committee MemberSclabassi, Robert/Rbobs@cdi.com
    Title: A Non-Contact Electrode for Measurement of Electrocardiography
    Status: Published
    Abstract: Heart disease has become a widespread epidemic threatening the health of millions of Americans and costing billions of dollars in therapy. In heart disease treatment, an effective heart monitoring technique is desired. In this thesis, a novel non-contact electrode was designed and fabricated to measure electrocardiography (ECG) based on widely used spherical volume conductor model. This model has been demonstrated to have a closed-form solution, which enables measurement of electric potential with capacitive electrode. Finite element analysis performed in Ansoft Maxwell software showed the feasibility of using an X-antenna to represent the ideal current dipole. The capacitive electrode we designed consists of two small sensing electrodes and a large reference electrode. This electrode measured promising signals for both direct and non-contact tests on spherical volume conductor model. Experiments were performed to find the best orientation and location for the electrode to measure the most significant signals on the surface of the sphere. Our electrode can also showed positive results in realizing both direct and non-contact measurement of the real ECG signals.
    Defense Date: 18 November 2011
    Approval Date: 02 February 2012
    Submission Date: 23 November 2011
    Release Date: 02 February 2012
    Access Restriction: 5 year -- Restrict access to University of Pittsburgh for a period of 5 years.
    Patent pending: No
    Number of Pages: 55
    Institution: University of Pittsburgh
    Thesis Type: Master's Thesis
    Refereed: Yes
    Degree: MS - Master of Science
    Uncontrolled Keywords: Non-contact measurement, capacitive electrode, electrocardiography, spherical volume conductor model
    Schools and Programs: Swanson School of Engineering > Electrical Engineering
    Date Deposited: 02 Feb 2012 09:01
    Last Modified: 02 Feb 2012 09:01

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