A simple method for removing initial irregularity of an electrocardiogram during a transient state of a power supply in a defibrillator

The defibrillator is a device that instantaneously discharges the high energy stored in the capacitor to the human body to help revitalize the heart. The circuit for charging the capacitor uses the same power source as the biosignal measurement unit. Therefore, variation in main power supply voltage...

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Bibliographic Details
Published inTechnology and health care Vol. 28; no. S1; pp. 327 - 334
Main Authors Yi, Jeong-Han, Kim, Ki-Han, Ahn, Jin-Su, Kim, Hyung-Sik
Format Journal Article
LanguageEnglish
Published Netherlands IOS Press BV 01.01.2020
IOS Press
Subjects
Capacitors
Charging
Circuits
Computer Simulation
Converters
Defibrillators
Distortion
EKG
Electric Capacitance
Electric Power Supplies
Electrocardiography
Electrocardiography - instrumentation
Electromagnetic interference
Electromagnetic Phenomena
Equipment Design
Humans
Irregularities
Medical equipment
Power supply
Regeneration
Signal distortion
Units of measurement
irregularity
electrocardiogram
galvanic isolation
transient state
Defibrillator
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Summary:The defibrillator is a device that instantaneously discharges the high energy stored in the capacitor to the human body to help revitalize the heart. The circuit for charging the capacitor uses the same power source as the biosignal measurement unit. Therefore, variation in main power supply voltage, ground noise, and electromagnetic interference from the charging circuit can induce distortion into the biosignal at the initial stage of charging. In this study, a simple method is proposed for removing the initial irregularity of an electrocardiogram due to the transient state of a power supply. To evaluate the method, a 1-channel electrocardiogram measurement unit and peripheral units were separated from the main control module using galvanic isolation. An isolated push-pull converter was designed to power the secondary side. The method was tested under steady-state and transient conditions. The obtained results proved that biosignal distortion can be significantly reduced. This method could be another simple implementation approach for solving signal distortions due to the transient status of power supplies used in medical devices.
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ISSN:0928-7329
1878-7401
DOI:10.3233/THC-209033