Non Contact Electro-Cardiography - Sensing Application
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|Sensatech is using electric
field and capacitive sensing techniques in non-contact electro-cardiography.
Initially for healthcare lab research, the technique and resulting sensor
system allows non-invasive data collection from multiple points on the human
body. This permits improved understanding of human heart conditions, and
introduces the possibility of mass-screening.
This new method for non-contact cardiography will allow researchers to
collect data more easily than traditional techniques have allowed because
electrodes no longer need to be attached to the skin but can simply be placed
in proximity to the skin to detect electrical activity beneath the skin's
Traditional techniques have required abrasion of the skin's surface to
obtain electrical contact, connecting multiple electrodes to someone by this
traditional means is time consuming and therefore a costly and restrictive
event within the data gathering research process.
Sensatech is working hard to ensure their design provides good high and low
frequency response which is important for this application:
High frequency response is required for the QRS complex wave while good low
frequency is required for P and T waves.
The sensor design is based on Sensatech's knowledge of using ultra-high
input impedance amplifiers and physically remote sensor heads. The intended
number of electrodes is sixteen to five hundred. Initially the shape and
position of the body can be determined by a capacitive array. Then the
non-contact cardiac measurements will be made. The processing of these two sets
of data should significantly advance the science of body surface potential