Apparatus and method for non-invasive monitoring of cardiac output
First Claim
1. A non-invasive apparatus for measuring cardiac mechanical performance of a patient, the apparatus comprising:
- a pressure applying element mountable on a limb of the patient for applying pressure high enough to make a segment of an artery within the limb achieve a collapsed state and empty it from blood at least momentarily;
at least one of a plurality of sensors coupled to said pressure applying element, sensing mechanical changes corresponding to volumetric changes in the artery as the artery progressively recuperates from its collapsed state;
processing unit communicating with said at least one of a plurality of sensors for receiving output corresponding to the mechanical changes from said at least one of a plurality of sensors and computing factors correlated with blood flow and calculate parameters indicating heart performance.
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Abstract
A non-invasive apparatus for measuring cardiac mechanical performance of a patient, the apparatus comprising a pressure applying element mountable on a limb of the patient for applying pressure high enough to make a segment of an artery within the limb achieve a collapsed state and empty it from blood at least momentarily; at least one of a plurality of sensors coupled to said pressure applying element, sensing mechanical changes corresponding to volumetric changes in the artery as the artery progressively recuperates from its collapsed state; processing unit communicating with said at least one of a plurality of sensors for receiving output corresponding to the mechanical changes from said at least one of a plurality of sensors and computing factors correlated with blood flow and calculate parameters indicating heart performance.
27 Citations
42 Claims
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1. A non-invasive apparatus for measuring cardiac mechanical performance of a patient, the apparatus comprising:
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a pressure applying element mountable on a limb of the patient for applying pressure high enough to make a segment of an artery within the limb achieve a collapsed state and empty it from blood at least momentarily;
at least one of a plurality of sensors coupled to said pressure applying element, sensing mechanical changes corresponding to volumetric changes in the artery as the artery progressively recuperates from its collapsed state;
processing unit communicating with said at least one of a plurality of sensors for receiving output corresponding to the mechanical changes from said at least one of a plurality of sensors and computing factors correlated with blood flow and calculate parameters indicating heart performance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A method for non-invasive measuring of changes in cardiac mechanical performance of a patient, the method comprising:
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providing a pressure applying element mountable on a limb of the patient for applying pressure enough to make a longitudinal segment of an artery within the limb achieve a collapsed state and empty it from blood at least momentarily;
providing sensor coupled to the pressure applying element, sensing mechanical changes corresponding to volumetric changes in the artery as the artery progressively recuperates from its collapsed state;
providing processing unit communicating with the sensor for receiving output corresponding to the mechanical changes from the sensor and computing factors correlated with blood flow and calculate parameters indicating heart performance;
applying pressure on a portion a limb of a patient through which artery passes enough to collapse the artery preventing at least momentarily the flow of blood through the collapsed artery;
sensing mechanical changes corresponding to volumetric changes in the artery as the artery progressively recuperates from its collapsed state;
computing factors correlated with blood flow and calculating parameters indicating heart performance. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42)
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Specification