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
whereBP is the blood pressure,R is the systemic vascular resistance,Q is the cardiac output, andc 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+c
whereBP 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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