Bioimpedance measurement using controller-switched current injection and multiplexer selected electrode connection
First Claim
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1. A system for measuring a voltage in a body part, the system comprising a multiplexing unit;
- N body leads for electrically connecting the multiplexing unit to the body part; and
a controller switching unit for allowing a current to flow through the body part between two body leads, n1 and n2 of the N body leads, and a resultant voltage to be measured between two body leads, n3 and n4 of the N body leads, where n1≠
n2 and n3≠
n4, but where n1 n2 n3 and n4 need not otherwise be distinct.
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Abstract
A system and method for measuring a voltage in a body part are described. The system includes a multiplexing unit, and N body leads for electrically connecting the multiplexing unit to the body part. The system also includes a controller switching unit for allowing a current to flow through the body part between two body leads, n1 and n2 of the N body leads, and a resultant voltage to be measured between two body leads, n3 and n4 of the N body leads, where n1≠n2 and n3≠n4, but where n1 n2 n3 and n4 need not otherwise be distinct.
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Citations
26 Claims
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1. A system for measuring a voltage in a body part, the system comprising
a multiplexing unit; -
N body leads for electrically connecting the multiplexing unit to the body part; and
a controller switching unit for allowing a current to flow through the body part between two body leads, n1 and n2 of the N body leads, and a resultant voltage to be measured between two body leads, n3 and n4 of the N body leads, where n1≠
n2 and n3≠
n4, but where n1 n2 n3 and n4 need not otherwise be distinct. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for measuring a voltage in a body part, the method comprising
providing a multiplexing unit; -
connecting the body part to the multiplexing unit with N body leads;
sending a current through the body part between two body leads, n1 and n2 of the N body leads in response to control signals sent by a controller switching unit; and
measuring a resultant voltage between two body leads, n3 and n4 of the N body leads, where n1≠
n2 and n3≠
n4, but where n1 n2 n3 and n4 need not otherwise be distinct. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A system for measuring an electrical property in a body part, the system comprising
a multiplexing unit; -
N body leads for electrically connecting the multiplexing unit to the body part; and
a controller switching unit adapted to allow both bipolar and tetrapolar measurements using the N body leads.
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23. A system for measuring an electrical property in a body part, the system comprising
a multiplexing unit; -
N body leads for electrically connecting the multiplexing unit to the body part; and
a controller switching unit adapted to allow a) a particular one of the N body leads to inject current into the body part for measuring a first resultant electrical property in a first measurement, and b) the particular one of the N body leads to measure a second resultant electrical property that results from injecting current into the body part in a second measurement. - View Dependent Claims (24)
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25. A method for measuring a voltage in a body part, the method comprising
providing a multiplexing unit; -
connecting the body part to the multiplexing unit with N body leads;
sending a current into the body part via a particular one of the N body leads to obtain a first resultant electrical property in a first measurement;
injecting current into the body part in a second measurement; and
measuring a second resultant electrical property with the particular one of the N body leads in the second measurement. - View Dependent Claims (26)
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Specification