System for examining cardiac function
First Claim
1. A system for examining a cardiac function comprising:
- means for measuring a blood flow amount ejected from a ventricle of a heart to an aorta of an object using reflected wave information of an ultrasonic pulse;
means for measuring a blood vessel diameter of either one of the aorta and a thick artery using reflected wave information of another ultrasonic pulse;
means for inputting, as a blood pressure data, at least one of a maximum and a minimum blood pressures; and
means for acquiring a parameter concerning the cardiac function on the basis of the measured ejection amount, the measured blood vessel diameter and the inputted blood pressure data.
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Accused Products
Abstract
The minimum amount of data regarding cardiac function required for evaluation is measured non-invasively and various cardiac function parameters are computed (estimated) based on the measured values, and the results are displayed in an optimal form for evaluation. A cardiac function examination system comprises a device for measuring the amount of blood ejected from the ventricle to the aorta based on reflected ultrasonic pulses, a device for measuring the aorta or thick artery diameter based on reflected ultrasonic pulses, a device for inputting at least one of maximum and minimum blood pressure values, a device for computing a maximum ventricular volume or an ejection fraction, and a device for acquiring parameters such as cardiac volume or aorta pressure parameter regarding cardiac function based on the measured values of the ejection amount, the blood vessel diameter, and the ejection fraction, or any one of these, and the input pressure values.
64 Citations
23 Claims
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1. A system for examining a cardiac function comprising:
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means for measuring a blood flow amount ejected from a ventricle of a heart to an aorta of an object using reflected wave information of an ultrasonic pulse; means for measuring a blood vessel diameter of either one of the aorta and a thick artery using reflected wave information of another ultrasonic pulse; means for inputting, as a blood pressure data, at least one of a maximum and a minimum blood pressures; and means for acquiring a parameter concerning the cardiac function on the basis of the measured ejection amount, the measured blood vessel diameter and the inputted blood pressure data. - View Dependent Claims (2, 3, 4)
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5. A system for examining a cardiac function comprising:
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means for measuring a blood flow amount ejected from a ventricle of a heart to an aorta of an object using reflected wave information of an ultrasonic pulse; means for measuring a blood vessel diameter of either one of the aorta and a thick artery using reflected wave information of another ultrasonic pulse; means for measuring either one of a maximum volume and an ejection function of a left ventricle of the heart; means for inputting, as a blood pressure data, at least one of a maximum and a minimum blood pressures; and means for acquiring a parameter concerning the cardiac function on the basis the measured ejection amount, the measured blood vessel diameter, the measured one of the maximum ventricular volume and the ejection function and the inputted blood pressure data. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A system for examining a cardiac function comprising:
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means for measuring a blood vessel diameter of either one of an aorta and a thick artery of an object using reflected wave information of an ultrasonic pulse; means for inputting, as a blood pressure data, a maximum and a minimum blood pressures of the object; and means for acquiring a parameter concerning a time variation in an absolute value of either one of an aorta pressure and the blood pressure.
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23. A system for examining a cardiac function comprising:
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means for measuring an amount of a flood flow ejected from a ventricle of a heart to an aorta of an object using a reflected wave information of an ultrasonic pulse; means for measuring either one of a maximum volume and an ejection fraction of a left ventricle of the heart using a reflected wave information of another ultrasonic pulse; and means for acquiring a parameter concerning an absolute value of a cardiac volume of the heart and a time variation of the absolute value on the basis of the measured ejection amount and the measured one of the maximum volume and the ejection fraction.
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Specification