Method for the measurement of post arteriolar pressure
First Claim
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1. A method for determining the post arteriolar pressure in a patient, which method comprises the steps of:
- (i) recording and storing the arterial blood pressure waveform of a patient from a blood pressure monitoring device over a period of time;
(ii) determining the nominal or actual stroke volume associated with each arterial blood pressure waveform;
(iii) obtaining the nominal or actual cardiac output from the data in step (ii); and
(iv) plotting the regression line for the equation BP=R×
Q+c where BP is the blood pressure, R is the systemic vascular resistance, Q is the cardiac output, and c is the post arteriolar pressure, and (v) determining the value of the post arteriolar pressure from the regression line.
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Abstract
A method for the measurement of post arteriolar pressure in a patient which is determined from information regarding the blood pressure (BP), systemic vascular resistance (R) and cardiac output (CO) by plotting the regression line for the equation BP=R×Q+c where c is the post arteriolar pressure, and determining the value of c from the regression line.
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Citations
18 Claims
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1. A method for determining the post arteriolar pressure in a patient, which method comprises the steps of:
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(i) recording and storing the arterial blood pressure waveform of a patient from a blood pressure monitoring device over a period of time;
(ii) determining the nominal or actual stroke volume associated with each arterial blood pressure waveform;
(iii) obtaining the nominal or actual cardiac output from the data in step (ii); and
(iv) plotting the regression line for the equation BP=R×
Q+cwhere BP is the blood pressure, R is the systemic vascular resistance, Q is the cardiac output, and c is the post arteriolar pressure, and (v) determining the value of the post arteriolar pressure from the regression line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method as claimed in 2 wherein the stroke volume in step (ii) is determined via a cardiac output measuring method.
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12. A method as claimed in 3 wherein the stroke volume in step (ii) is determined via a cardiac output measuring method.
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13. A method as claimed in 2 wherein the regression line in step (iv) is plotted by means of a computer.
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14. A method as claimed in 3 wherein the regression line in step (iv) is plotted by means of a computer.
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15. A method as claimed in 4 wherein the regression line in step (iv) is plotted by means of a computer.
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16. A method as claimed in 5 wherein the regression line in step (iv) is plotted by means of a computer.
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17. A method as claimed in 6 wherein the regression line in step (iv) is plotted by means of a computer.
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18. A method as claimed in 7 wherein the regression line in step (iv) is plotted by means of a computer.
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