Systems and methods for determining blood pressure
First Claim
1. A method for determining blood pressure comprising:
- insonating a target tissue site within or on or in proximity to a blood vessel using an ultrasound source;
acquiring acoustic data from the target tissue site using an ultrasound detector over a plurality of cardiac cycles;
determining a geometrical property of the blood vessel based on the acoustic data acquired over a plurality of cardiac cycles;
assessing the pulsatility of the blood vessel based on the geometrical property of the blood vessel;
determining the arterial or venous blood pressure based on the pulsatility of the blood vessel over said plurality of cardiac cycles; and
outputting the arterial or venous blood pressure data for display.
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Accused Products
Abstract
Systems and methods for noninvasive assessment of cardiac tissue properties and cardiac parameters using ultrasound techniques are disclosed. Determinations of myocardial tissue stiffness, tension, strain, strain rate, and the like, may be used to assess myocardial contractility, myocardial ischemia and infarction, ventricular filling and atrial pressures, and diastolic functions. Non-invasive systems in which acoustic techniques, such as ultrasound, are employed to acquire data relating to intrinsic tissue displacements are disclosed. Non-invasive systems in which ultrasound techniques are used to acoustically stimulate or palpate target cardiac tissue, or induce a response at a cardiac tissue site that relates to cardiac tissue properties and/or cardiac parameters are also disclosed.
64 Citations
11 Claims
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1. A method for determining blood pressure comprising:
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insonating a target tissue site within or on or in proximity to a blood vessel using an ultrasound source; acquiring acoustic data from the target tissue site using an ultrasound detector over a plurality of cardiac cycles; determining a geometrical property of the blood vessel based on the acoustic data acquired over a plurality of cardiac cycles; assessing the pulsatility of the blood vessel based on the geometrical property of the blood vessel; determining the arterial or venous blood pressure based on the pulsatility of the blood vessel over said plurality of cardiac cycles; and outputting the arterial or venous blood pressure data for display. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for determining blood pressure comprising:
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an ultrasound source configured to insonate a target tissue site within or on or in proximity to a blood vessel with ultrasound; an ultrasound detector configured to acquire acoustic data from the target tissue site over a plurality of cardiac cycles; a controller configured to determine a geometrical property of the blood vessel based on the acoustic data acquired over a plurality of cardiac cycles and determining the arterial or venous blood pressure based on changes in the geometrical property of the blood vessel over a plurality of cardiac cycles; and a display component configured to display the arterial or venous blood pressure. - View Dependent Claims (11)
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Specification