Non-invasive Cardiac Characteristic Determination System
First Claim
1. A non-invasive system for determining cardiac stroke volume, comprising:
- an input processor for receiving vital sign signals and hemodynamic signals of a patient,a computation processor for calculating a heart stroke volume of said patient by applying a factor to a determined vessel stroke volume, said vessel stroke volume being determined as volume of blood transferred through the blood vessel in a heart cycle using the measured blood vessel internal diameter and the rate of flow of blood;
a mapping processor for using predetermined mapping information associating ranges of patient signal values and stroke volume with medical conditions for mapping the received patient vital sign signals and hemodynamic signals and calculated stroke volume to data indicating a medical condition of said patient; and
an output processor for providing data representing the indicated medical condition to a destination device.
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Abstract
A system uses non-invasive laser, ultrasound or electro-magnetic monitoring, to derive CO/SV, CO/SV deviation, and related cardiac function parameters. The non-invasive system determines cardiac stroke volume and includes an input processor for receiving determined values provided using a measurement processor. The determined values comprise, a blood vessel internal diameter and rate of flow of blood through the blood vessel in a heart cycle. A computation processor calculates a vessel stroke volume comprising volume of blood transferred through the blood vessel in a heart cycle using the measured blood vessel internal diameter and the rate of flow of blood. The computation processor determines cardiac stroke volume by determining a factor for use in adjusting the vessel stroke volume to provide a cardiac stroke volume and adjusting the vessel stroke volume using the determined factor to provide the cardiac stroke volume. An output processor provides data representing the determined cardiac stroke volume to a destination.
39 Citations
15 Claims
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1. A non-invasive system for determining cardiac stroke volume, comprising:
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an input processor for receiving vital sign signals and hemodynamic signals of a patient, a computation processor for calculating a heart stroke volume of said patient by applying a factor to a determined vessel stroke volume, said vessel stroke volume being determined as volume of blood transferred through the blood vessel in a heart cycle using the measured blood vessel internal diameter and the rate of flow of blood; a mapping processor for using predetermined mapping information associating ranges of patient signal values and stroke volume with medical conditions for mapping the received patient vital sign signals and hemodynamic signals and calculated stroke volume to data indicating a medical condition of said patient; and an output processor for providing data representing the indicated medical condition to a destination device. - View Dependent Claims (2)
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3. A non-invasive system for determining cardiac stroke volume, comprising:
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an input processor for receiving determined values provided using a measurement processor, said determined values comprising, a blood vessel internal diameter and rate of flow of blood through said blood vessel in a heart cycle; a computation processor for, calculating a vessel stroke volume comprising volume of blood transferred through the blood vessel in a heart cycle using the measured blood vessel internal diameter and the rate of flow of blood, calculating cardiac stroke volume by determining a factor for use in adjusting said vessel stroke volume to provide a cardiac stroke volume and adjusting said vessel stroke volume using the determined factor to provide said cardiac stroke volume; and an output processor for providing data representing the determined cardiac stroke volume to a destination. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A non-invasive method for determining cardiac stroke volume, comprising the activities of:
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receiving data indicating, a blood vessel internal diameter and rate of flow of blood through said blood vessel in a heart cycle; calculating a vessel stroke volume comprising volume of blood transferred through the blood vessel in a heart cycle using the measured blood vessel internal diameter and the rate of flow of blood, determining cardiac stroke volume by determining a factor for use in adjusting said vessel stroke volume to provide a cardiac stroke volume and adjusting said vessel stroke volume using the determined factor to provide said cardiac stroke volume; and providing data representing the determined cardiac stroke volume to a destination.
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Specification