System for body impedance data acquisition
DCFirst Claim
1. A system for acquisition of body impedance data quantitative measurement of the conductive potential of the body, the system comprising in combination:
- (a) a plurality of electrode sensors for mounting to a patient'"'"'s body to be analyzed at prescribed locations forming a tetrapolar system;
(b) mounting means for removably attaching said electrode sensors to a Kelvin Bridge bio-impedance meter system having four terminal leads;
(c) means for generating a current flow through said electrode sensors at a frequency of from about 40 Kilohertz to about 60 Kilohertz, thereby producing an output range of from about 0 to 1,000 ohms;
(d) means for accepting input variables comprised of biological patient data including, height, weight, age and sex and bio-impedance signals derived from step (c) to determine a population specific variable and to produce a correspondence electrical signal;
(e) means for manipulating electrical signals derived from said means for generating a current flow and said means for accepting input variables to produce a resultant output signal;
p1 (f) indicator means for displaying said resultant output signal to provide quantitative measurement of conductive potential of said patient'"'"'s body based on lean tissue content of said patient; and
(g) means for comparing said resultant output signal with a control signal to produce an output representative of fat tissue, lean tissue and body water.
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Abstract
The unique system of the present invention provides an accurate valid measaurement of human body composition consisting of fat tissue, lean tissue and body water. The inventive methodology provides a procedure for quantitative measurement of the conductive potential of the body, which is based on the lean tissue content of the body, in a convenient and reliable manner. In more detail, the quantitative measurement in accordance with the present invention is referred to as a "bio-impedance signal." This electrical signal, in ohms, is derived from a means for measuring body impedance component of the system. The resultant signal (three digit number, between 1 and 1000 ohms) is then entered into a modifying means component to accurately predict the body composition of the tested individual. The unique modifying means, in one embodied form, comprises prediction formulas derived from biological data inputs including: a patient'"'"'s height, weight, age and sex, to determine a "population prediction variable." Thus, the unique modifying means of the inventive system interprets bio-impedance readings as "population specific", i.e., specific impedance values are exhibited by various pre-defined populations of individuals. This specificity is related to morph-type, leanness, body water and age. In accordance with the present invention, an algorithm formula approach to prediction formulas is utilized to define an appropriate individual or set of variables.
155 Citations
7 Claims
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1. A system for acquisition of body impedance data quantitative measurement of the conductive potential of the body, the system comprising in combination:
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(a) a plurality of electrode sensors for mounting to a patient'"'"'s body to be analyzed at prescribed locations forming a tetrapolar system; (b) mounting means for removably attaching said electrode sensors to a Kelvin Bridge bio-impedance meter system having four terminal leads; (c) means for generating a current flow through said electrode sensors at a frequency of from about 40 Kilohertz to about 60 Kilohertz, thereby producing an output range of from about 0 to 1,000 ohms; (d) means for accepting input variables comprised of biological patient data including, height, weight, age and sex and bio-impedance signals derived from step (c) to determine a population specific variable and to produce a correspondence electrical signal; (e) means for manipulating electrical signals derived from said means for generating a current flow and said means for accepting input variables to produce a resultant output signal;
p1 (f) indicator means for displaying said resultant output signal to provide quantitative measurement of conductive potential of said patient'"'"'s body based on lean tissue content of said patient; and(g) means for comparing said resultant output signal with a control signal to produce an output representative of fat tissue, lean tissue and body water. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification