Apparatus for measuring the bioelectrical impedance of a living body
AssigneeTanita Corporation
InventorYoshinori Fukuda
Life of this patent
Estimating the term…
Abstract
Disclosed is an improved bioelectrical impedance gauge which is so designed that the high-frequency current flowing between two selected points in a living body may be detected in the vicinity of either selected point, and that the voltage appearing between two points selected in the current passage in which the high-frequency current flows may be applied to a high-impedance buffer circuit proximate to the two points selected in the current passage.
Claims15
An apparatus for measuring the bioelectrical impedance of a living body in which the impedance of the living body can be determined by flowing a weak electric current of high-frequency between two selected points on the living body and determining the voltage appearing between another two points selected in the current passage in which the weak current flows, the apparatus comprising:
- a measuring apparatus (1) including a high-frequency current source (10), a high-frequency current determining section (13, 20) and a voltage determining section (15);
- at least one high-frequency current supplying probe (21, 22) connected to said high-frequency current source (10) via a high frequency current supplying cable (81, 82) and to said high-frequency current determining section (13, 20) via a shielded-conductor cable (31, 32);
- a pair of high-frequency current supplying electrodes (41, 42) to be applied to said two selected points;
- and
- a pair of voltage measuring electrodes (43, 44) to be applied to said another two points, said electrodes (43, 44) connected to said voltage determining section (15);
- wherein said at least one high-frequency current supplying probe (21, 22) has one of said pair of high-frequency current supplying electrodes (41, 42) and a high-frequency current detector (51, 52) connected to and positioned in the vicinity of said one of said pair of high-frequency current supplying electrodes (41, 42).
An apparatus for measuring the bioelectrical impedance of a living body in which the impedance of the living body can be determined by flowing a weak electric current of high-frequency between two selected points on the living body and determining the voltage appearing between another two points selected in the current passage in which the weak electric current flows, the apparatus comprising:
- a measuring apparatus (1) including a high-frequency current source (10), a high-frequency current determining section (13, 20) and a voltage determining section (15);
- a pair of high-frequency current supplying electrodes (41, 42) to be applied to said two selected points and said electrodes (41, 42) connected to said high-frequency current source (10);
- at least one voltage measuring probe (23, 24) connected to said voltage determining section (15) via a shielded-conductor cables (33, 34);
- and
- a pair of voltage measuring electrodes (43, 44) to be applied to said another two points;
- wherein said at least one voltage measuring probe (23, 24) has one of said pair of voltage measuring electrodes (43, 44) and a high input-impedance amplifier (63, 64) connected to and positioned in the vicinity of said one of said pair of voltage measuring electrodes (43, 44).
An apparatus for measuring the bioelectrical impedance of a living body in which the impedance of the living body can be determined by flowing a weak electric current of high-frequency between two selected points on the living body and determining the voltage appearing between another two points selected in the current passage in which the weak electric current flows, the apparatus comprising:
- a measuring apparatus (1) including a high-frequency current source (10), a high-frequency current determining section (13, 20) and a voltage determining section (15);
- at least one high-frequency current supplying probe (21, 22) connected to said high-frequency current source (10) via a high frequency current supplying cable (81, 82) and to said high-frequency current determining section (13, 20) via a shielded-conductor cable (31, 32);
- a pair of high-frequency current supplying electrodes (41, 42) to be applied to said two selected points;
- and
- at least one voltage measuring probe (23, 24) connected to said voltage determining section (15) via a shielded-conductor cable (33, 34);
- and
- a pair of voltage measuring electrodes (43, 44) to be applied to said another two points;
- wherein said at least one high-frequency current supplying probe (21, 22) has one of said pair of high-frequency current supplying electrodes (41, 42) and a high-frequency current detector (51, 52) connected to and positioned in the vicinity of said one of said pair of high-frequency current supplying electrodes (41, 42), and
- wherein said at least one voltage measuring probe (23, 24) has one of said pair of voltage measuring electrodes (43, 44) and a high input-impedance amplifier (63, 64) connected to and positioned in the vicinity of said one of said pair of voltage measuring electrodes (43, 44).
Dependencies are inferred from the claim text.