Systems and methods for bioimpedance body composition measurement
Inventors
Elia, Liron • Iddan, Gavriel J.
Assignees
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Publication Number
US-12016826-B2
Publication Date
2024-06-25
Expiration Date
Abstract
There is provided a system for monitoring a heart of a subject and monitoring impedance-related parameters, comprising: a feeding tube, an electrode disposed(s) on a distal end of the feeding tube, a controller that performs, while the feeding tube is in located in an esophagus and feeding is delivered to a subject via the feeding tube, in a plurality of iterations: continuously measuring voltage at the electrode(s) of the feeding tube, applying alternating current(s) between the electrode(s) of the feeding tube and at least one other electrode, computing impedance measurement(s) from the electrode(s) of the feeding tube according to the applied alternating current(s) and the measured voltage, computing impedance-related parameter(s) based on the impedance measurement(s), terminating the application of the alternating current(s), obtaining an electrocardiogram (ECG) measurement based on the voltage measured at the electrode(s) of the feeding tube, and providing the impedance-related parameter(s) and the ECG measurement.
Core Innovation
A system measures impedance for estimating body composition in a body segment of a patient using a plurality of contact circuitry. Each contact circuitry is an independent physical structure independently positioned at different locations of the patient’s body, includes three electrodes arranged along a long axis, and has a different unique address and assignment. The plurality of contact circuitry are spaced apart and independently positionable at the different locations.
A conductor connects the three electrodes of each contact circuitry in series. A controller transmits a signal indicative of the respective unique address and assignment of a first contact circuitry and a second contact circuitry, and the signal is transmitted serially and sequentially along the conductor to other contact circuitry of the plurality with a different signal. The first and second contact circuitry of a first pair are located at opposite ends of the body segment.
The controller operates a middle electrode of the three electrodes of the first contact circuitry for transmission of current and operates an inner facing electrode of the three electrodes of the second contact circuitry for voltage measurement. The controller obtains current and voltage measurements for computing at least one impedance measurement indicative of the impedance of the body segment and provides the impedance measurement for estimation of the body composition of the body segment.
The controller iteratively selects a second pair of contact circuitry connected by the conductor, collects a second impedance measurement using the electrodes of the second pair, and provides the second impedance measurement for estimation of a second body composition of a second body segment. The same contact circuitry can be a member of both the second pair and the first pair.
Claims Coverage
The independent claim is clm-00001. It contains 6 inventive features centered on sequential addressing and measurement architecture with iterative segmental impedance collection for body composition estimation.
Addressable three-electrode contact circuitry independently positioned along a long axis
A plurality of contact circuitry, each contact circuitry being an independent physical structure designed to be independently positioned at different locations of a body of the patient, each contact circuitry including three electrodes for contacting the body of the patient arranged along a long axis of the contact circuitry, each contact circuitry associated with a different unique address and assignment, wherein the plurality of contact circuitry are spaced apart and independently positionable at the different locations.
Series-connected electrodes on a conductor for sequential addressing
A conductor, wherein the three electrodes of the plurality of contact circuitry are sequentially spaced apart along the conductor and electrically connected in series to the conductor.
Controller transmitting address and assignment signals serially to select electrode pairs
A controller that transmits on the conductor a signal indicative of the respective unique address and assignment of a first contact circuitry and a second contact circuitry of a first pair of contact circuitry of the plurality of contact circuitry, the first contact circuity and the second contact circuity of the first pair located at opposite ends of the body segment, wherein the signal is transmitted to the plurality of contact circuitry serially connected and sequentially located along the conductor, the signal transmitted to other contact circuitry of the plurality of contact circuitry being different than the first pair of contact circuitry.
Current transmission via middle electrode and voltage measurement via inner facing electrode
The controller configured to operate a middle electrode of the three electrodes of the first contact circuity for transmission of current, and to operate an inner facing electrode of the three electrodes of the second contact circuitry of the first pair for voltage measurement, obtain the current and the voltage measurement for computing at least one impedance measurement indicative of the impedance of the body segment, and provide the at least one impedance measurement for estimation of the body composition of the body segment.
Iteratively selecting additional contact pairs for segmental impedance and body composition estimation
The controller iteratively selects a second pair of contact circuitry of the plurality of contact circuitry connected by the conductor, and collects a second impedance measurement by measuring impedance using the electrodes of the second pair of contact circuitry, the second impedance measurement indicative of an impedance of the second body segment located between the second pair of contact circuitry, and provides the second impedance measurement for estimation of a second body composition of the second body segment, including muscle mass and/or fat free mass of the second body segment.
Shared contact circuitry between consecutive electrode pairs
A same contact circuitry is a member of the second pair of contact circuitry and of the first pair of contact circuitry.
Across clm-00001, the claim coverage centers on an addressable, independently positionable set of three-electrode contact circuitry connected in series along a conductor, with a controller transmitting unique address and assignment signals and performing current transmission and voltage measurement on selected electrode pairs. The controller iteratively selects different electrode pairs to obtain impedance measurements for different body segments, enabling segmental body composition estimation, including muscle mass and/or fat free mass for the second body segment.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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