Method for determining the value of cardiologic quantities and apparatus for performing said method
First Claim
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1. A method for determining the value of cardiologic quantities comprising:
- encircling a portion of a body having a blood-conveying vessel with capacitor plates of a capacitor, so that the body portion engages the capacitor and defines the dielectric of the capacitor;
maintaining the capacitor plates fixed relative to one another; and
measuring changes in the capacitance of the capacitor.
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Abstract
The application concerns a method for determining the value of cardiologic quantities and an apparatus for performing such method.
In accordance with the invention capacities and capacity variations are measured in response to the electric properties of the body and its functional changes. The measurement is done by providing capacitive sensors. The capacitive sensors are each connected in a branch of a measuring bridge for capacity-voltage-transformation.
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Citations
10 Claims
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1. A method for determining the value of cardiologic quantities comprising:
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encircling a portion of a body having a blood-conveying vessel with capacitor plates of a capacitor, so that the body portion engages the capacitor and defines the dielectric of the capacitor; maintaining the capacitor plates fixed relative to one another; and measuring changes in the capacitance of the capacitor. - View Dependent Claims (2, 3, 4, 5)
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6. Apparatus for determining the value of cardiologic quantities comprising:
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a capacitive measuring bridge circuit having a plurality of branches; means for transmitting a signal through the branches; - View Dependent Claims (8, 9, 10)
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7. means for measuring the potential difference between each of branches;
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a capacitor in one of said branches for encircling a portion of a body having a blood-conveying vessel, the capacitor defining a collar which includes a plurality of parallel, electrically conductive strips isolated within a non-conducting material, the conductive strips comprising a pair of capacitor plates.
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Specification