US 5,469,859 A · Non-invasive method and device for collecting measurements representing body activity and determining cardiorespiratory parameters of the human body based upon the measurements collected

Abstract

A medical device, utilizing a non-invasive method for determining the main cardiorespiratory parameters of a patient's body, and employing a method of operation wherein two or four electrodes are applied to the patient's body in a manner enabling integral bioimpedance measurements of the total body of a patient to be effected. High stability amplitude alternating current is passed through the electrodes into the body so as to obtain an integral impedance curve of the body and derive therefrom simultaneous automatic separation of an active component. The desired cardiorespiratory parameters of the body are calculated from the active component of the integral bioimpedance, using empiric formulae applicable to integral bioimpedance measurements; the calculation being accomplished based on the average data obtained during a respiration cycle.

Claims25

Dependent claims

A non-invasive method for determining of the main cardiorespiratory parameters of a human body, comprising the steps of:

attaching electrodes to the body in a manner so as to enable the measuring of integral bioimpedance measurements of the total body of a patient;
transmitting a high stability amplitude alternating current through said electrodes and into said body;
obtaining an integral impedance curve of said body from the connected electrodes upon transmission of the high stability amplitude alternating current;
transmitting the integral impedance curve to a measuring device;
converting the impedance curve to a working signal;
transmitting the working signal to a computer;
simultaneously and automatically separating an active component from said integral impedance;
calculating cardiorespiratory parameters;
and
applying the computerized calculation of the cardiorespiratory parameters of said body from the active component of said integral bioimpedance, using empiric formulae applicable, to integral bioimpedance measurements;
the computerized calculation being based on the bioimpedance measurements measured during a respiration cycle.

8 more elements

A non-invasive medical device for determining at least one cardiorespiratory parameter of a human body, the device comprising:

at least two electrodes for attachment to the human body,
an electrical total body integral bioimpedance measuring device coupled to the at least two electrodes and including a high stability amplitude alternative current source and electronic means for automatically deriving an active component of said integral bioimpedance wherein the measuring device transmits a high stability amplitude alternative current through said at least two electrodes;
a computer coupled to the electrical integral bioimpedance measuring device for receiving a signal transmitted from the measuring device and calculating said at least one cardiorespiratory parameter from the active component of the integral bioimpedance based upon the received signal;
and
display means connected to the computer for displaying said at least one cardiorespiratory parameter from the active component of the integral bioimpedance.

2 more elements

Dependencies are inferred from the claim text.

Non-invasive method and device for collecting measurements representing body activity and determining cardiorespiratory parameters of the human body based upon the measurements collected

Life of this patent

Non-invasive method and device for collecting measurements representing body activity and determining cardiorespiratory parameters of the human body based upon the measurements collected

Life of this patent

Abstract

Claims25