Method and apparatus for determining blood pressure and cardiovascular condition
First Claim
1. A method of determining blood pressure of a patient comprising the steps of:
- a. affixing a non-invasive pressure inducing means and transducer means to the patient,b. elevating the pressure induced by the pressure inducing means to a suprasystolic pressure,c. decreasing the pressure induced by the pressure inducing means over time to a pressure below diastolic pressure,d. obtaining a data stream from the transducer means, the data stream including pressure data and pulsation signal data,e. processing said data stream to create an information stream which correlates the pressure data and the pulsation signal data, the information stream including at least two pulse maximum points and at least two pulse minimum points, andf. examining the information stream to determine at least one of the systolic, diastolic and mean arterial pressures of the patient by selecting at least one of the at least two pulse minimum points as a point for determining said at least one of the systolic, diastolic and mean arterial pressure of the patient.
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Accused Products
Abstract
A method is disclosed for determining the blood pressure of a patient. The method includes the steps of affixing a non-invasive pressure inducing device and transducer to the patient. A data stream is obtained from the transducer. The data stream includes pressure data and pulsation signal data. The data stream is processed to create an information stream which correlates the pressure data and the pulsation signal data. The information stream includes at least two pulse maximum points and at least one pulse minimum point. At least one of the systolic, diastolic and mean arterial pressures of the patient are determined by choosing a pressure determination point in the information stream between the two pulse maximum points. Additionally, an apparatus for determining blood pressure is disclosed.
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Citations
44 Claims
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1. A method of determining blood pressure of a patient comprising the steps of:
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a. affixing a non-invasive pressure inducing means and transducer means to the patient, b. elevating the pressure induced by the pressure inducing means to a suprasystolic pressure, c. decreasing the pressure induced by the pressure inducing means over time to a pressure below diastolic pressure, d. obtaining a data stream from the transducer means, the data stream including pressure data and pulsation signal data, e. processing said data stream to create an information stream which correlates the pressure data and the pulsation signal data, the information stream including at least two pulse maximum points and at least two pulse minimum points, and f. examining the information stream to determine at least one of the systolic, diastolic and mean arterial pressures of the patient by selecting at least one of the at least two pulse minimum points as a point for determining said at least one of the systolic, diastolic and mean arterial pressure of the patient. - 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)
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26. A method of determining mean arterial blood pressure of a patient comprising the steps of:
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a. affixing a non-invasive pressure inducing means and transducer means to the patient; b. obtaining a data stream from the transducer means, the data stream including pulsation signal data, c. processing said data stream to create a generally sinusoidal information stream curve which includes pulsation signal data and time data, and has at least one apex point and at least one nadir point, d. determining the patient'"'"'s systolic and diastolic pressure, e. creating a scale of arterial pressures by setting the arterial pressure at the apex point to equal the determined systolic pressure, and setting the arterial pressure at the nadir point to equal the determined diastolic pressure, f. selecting a pressure determination point in the information stream curve, and g. utilizing the chosen pressure determination point, the scale of arterial pressures and the determined systolic and diastolic pressures to determine the patient'"'"'s mean arterial pressure. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33)
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34. An apparatus for determining blood pressure of a patient comprising:
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a. a non-invasive pressure inducing means and transducer means attachable to the patient for providing a data stream including pressure data and pulsation signal data, b. an analog to digital convertor means having a resolution of at least about twelve bits, c. processing means cooperable with the analog to digital convertor means for processing the data to create a generally sinusoidal information stream curve of at least one pulse cycle of the patient which correlates the pressure data and the pulsation signal data, the information stream curve being comprised of at least about one hundred items of pressure data and pulsation signal data per second, and including a rapidly descending portion, a trough portion, and a rapidly ascending portion, and d. means for analyzing the information stream curve trough portion to determine at least one of the systolic pressure, diastolic pressure, and mean arterial pressure of the patient. - View Dependent Claims (35, 36)
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37. A method of determining the condition of the cardiovascular system of a patient comprising the steps of:
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(a) affixing a non-invasive pressure inducing means and transducer means to the patient, (b) obtaining a data stream from the transducer means during such time as the pressure induced by the pressure inducing means is at a suprasystolic pressure, the data stream including pulsation signal data, (c) processing said data stream to create an information system which includes pulsation signal data and time data, (d) processing the information stream to create a first derivative stream which includes information relating to the rate of change of the data of the information stream, and an integration stream, and (e) examining at least one of the information stream, first derivative stream and integration stream at said suprasystolic pressure to determine the condition of the patient'"'"'s cardiovascular system. - View Dependent Claims (38, 39, 40)
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41. A method of determining the condition of the cardiovascular system of a patient comprising the steps of:
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(a) affixing a non-invasive pressure inducing means and transducer means to the patient, (b) obtaining a data stream from the transducer means during such time as the pressure induced by the pressure inducing means is at a sub-diastolic pressure, the data stream including pulsation signal data, (c) processing said data stream to create an information stream which includes pulsation signal data and time data, (d) processing the information stream to create a first derivative stream which includes information relating to the rate of change of the data of the information stream and an integration stream, and (e) examining at least one of the information stream, first derivative stream and integration stream at said sub-diastolic pressure to determine the condition of the patient'"'"'s cardiovascular system. - View Dependent Claims (42)
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43. A method for determining mean arterial blood pressure of a patient comprising the steps of:
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(a) affixing a non-invasive pressure inducing means and transducer means to the patient, (b) obtaining a data stream from the transducer means, the data stream including pulsation signal data, (c) processing said data stream to create an information stream which includes pulsation signal data and time data, (d) determining the patient'"'"'s systolic and diastolic pressure, (e) selecting a pressure determination point in the information stream at a pressure less than the patient'"'"'s determined diastolic pressure, and (f) utilizing the selected pressure determination point, and the determined sytolic and diastolic pressures to determine the patient'"'"'s mean arterial pressure.
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44. A method for determining mean arterial blood pressure of a patient comprising the steps of:
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(a) affixing a non-invasive pressure inducing means and transducer means to the patient, (b) obtaining a data stream from the transducer means, the data stream including pulsation signal data, (c) processing the data stream to create a generally sinusoidal information stream curve which includes pulsation signal data and time data, and has at least one apex point and at least one nadir point, (d) determining the patient'"'"'s sytolic and diastolic pressure, (e) selecting a pressure determination point in the information stream curve between the at least one apex point and the at least one nadir point wherein the slope of the information stream curve changes significantly.
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Specification