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US 2020/0268274 A1Published application
Device and method for measuring tissue impedance
AssigneeMedical Device LLC
InventorsThomas V. Saliga, Vasiliy Abramov
Life of this patent
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Abstract
A micro-device and method for the measurement of impedance through a biological load simulating electrical impedance spectroscopy allows for miniaturization and use of low power direct current.
Claims17
A micro-device for the measurement of tissue impedance by electrical impedance spectroscopy technique, said device comprising:
- a. a low voltage direct current power supply;
- b. a voltage generator with series impedance;
- c. a micro-controller for selecting voltage impedance and for driving discrete current limited binary pulses;
- d. at least an electrode pair for contact with biological tissue in electrical communication with said micro-controller;
- e. a sampling switch operable between a closed and open position for timed sampling a charge of a discrete current limited binary pulse;
- f. a capacitor for accumulating said sampled charge and for discharging said sampled charge when said sampled charge is equivalent to an accumulated charge;
- g. an analog to digital converter for digitizing said discharged sampled charge;
- h. switching means for reversing circuit polarity;
- and
- i. transmission means in wireless communication with an external unit for transmitting said digitized sampled charge from said device.
7 more elements
A micro-device for the measurement of tissue impedance by electrical impedance spectroscopy technique, said device comprising:
- a. a low voltage direct current power supply;
- b. at least three resistors for limiting current voltage;
- c. a micro-controller for selectively limiting voltage and for driving discrete current limited binary pulses;
- d. four electrodes for contact with biological tissue in electrical communication with said micro-controller, two of said electrodes comprising injection electrodes for injecting said current limited binary pulses into biological tissue and two said electrodes comprising sensing electrodes for sensing a potential of said current limited binary pulse flowing through said tissue;
- e. a sampling switch operable between a closed position for timed sampling a charge of a discrete current limited binary pulse and an open position;
- f. a capacitor for accumulating said sampled charge and for discharging said accumulated charge when. a sampled charge is equivalent to an accumulated charge;
- g. an analog to digital converter for digitizing said sampled charge;
- h. switching means for reversing circuit polarity;
- and
- i. transmission means in wireless communication with an external unit for transmitting said digitized sampled charge from said device.
7 more elements
Dependencies are inferred from the claim text.