Passive/non-invasive systemic and pulmonary blood pressure measurement
First Claim
1. An apparatus for monitoring blood pressure comprising:
- a means for detecting audio signals;
a means for signal processing connected to the signal detecting means;
a means for signal storage connected to the signal processing means; and
a means for monitoring, connected to the signal processing means.
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Accused Products
Abstract
An apparatus, operation and method for measurement of systemic and/or pulmonic blood pressure. The present invention offers a passive non-invasive method and system that can be used where measurement of systemic pressure with a traditional blood pressure cuff is contraindicated. The present invention also affords a means for early diagnosis and opportunity for intervention in patients with no symptoms or signs of elevated pulmonary blood pressure that can be performed as part of a routine physical exam. The present invention accomplishes this non-invasive measurement through detection, identification and characterization of the second heart sound acoustic signature associated with heart valve closure. An apparatus for measuring systemic and/or pulmonic blood pressure in accordance with the present invention includes a sensor assembly comprising a housing, an electronic module, a shock dampener, a mounting means, a transducer, an acoustic coupling and a back cover. The sensor assembly is connected to a data acquisition module which in turn is connected to a signal processing means, a remote connection means and a monitor. An improved acoustic coupling is disclosed that provides low-loss acoustic transmission coupling between the skin of the patient and the detector.
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Citations
70 Claims
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1. An apparatus for monitoring blood pressure comprising:
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a means for detecting audio signals;
a means for signal processing connected to the signal detecting means;
a means for signal storage connected to the signal processing means; and
a means for monitoring, connected to the signal processing means. - 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, 26, 27, 28, 29, 30, 31)
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32. A method of determining blood pressure comprising:
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performing initialization procedures;
acquiring physiologic signals;
acquiring background signals;
subtracting background signals from physiologic signals creating physiologic data;
processing physiologic data forming a time domain output and a frequency domain data output;
comparing the time domain output and the frequency domain output with a reference pattern and feature library; and
determining if a disease modality is indicated. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A method of determining systemic blood pressure using sonospectrography analysis comprising:
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monitoring the frequency of a sound emitted by the aortic semilunar valve, wherein the sound is detected using a sensor assembly, to monitor physiologic signals, the sensor assembly comprising;
a housing having a front and a back;
an electronic module connected to the housing;
a shock dampener connected to the front of the housing;
a means for mounting connected to the housing;
an acoustic coupler connected to the mounting means;
a transducer connected to the acoustic coupler; and
a cover connected to the back of the housing;
processing the physiologic signals, the processing comprising;
applying signal conditioning and time domain averaging to the physiologic signals to form conditioned and averaged data;
formatting the conditioned and averaged data in an array to create formatted data;
aligning and normalizing formatted data, to create aligned and formalized data;
normalizing and integrating the aligned and formalized data, to create normalized and integrated data that has time domain components and frequency domain components;
passing the time domain components of the normalized and integrated data through a time domain correlator and feature extraction process;
passing the frequency domain components of the normalized and integrated data through a frequency domain correlator and feature extractor, to create a time domain output and a frequency domain output;
comparing time domain output and the frequency domain output with a reference pattern and feature library; and
determining if a disease modality is indicated. - View Dependent Claims (44)
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45. A sensor assembly for detecting physiological sounds comprising:
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a housing having a front and a back;
an electronic module connected to the housing;
a shock dampener connected to the front of the housing;
a means for mounting connected to the shock dampener;
an acoustic coupler connected to the mounting means;
a transducer connected to the acoustic coupler; and
a cover connected to the back of the housing. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52, 53, 54)
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55. A sensor assembly for detecting physiological sounds comprising:
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a housing, having a front, a back, and an interior;
an electronic module that nests in the interior of the housing;
a first shock dampener connected to the front of the housing;
a first mounting means connected to the first shock dampener;
a transducer connected to the first mounting means;
a first acoustic coupling connected to the transducer;
a second shock dampener connected to the back of the housing;
a second mounting means connected to the second shock dampener;
a second transducer connected to the second mounting means; and
a second acoustic coupling connected to the second transducer. - View Dependent Claims (56, 57, 58, 59, 60, 61, 62, 63, 64)
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65. An apparatus for determining blood pressure comprising:
an acoustic coupling, wherein the acoustic coupling provides a low-loss acoustic transmission coupling between skin and a piezoelectric transducer. - View Dependent Claims (66, 67, 68)
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69. An apparatus for monitoring blood pressure comprising:
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an acoustic coupling;
a transducer connected to the acoustic coupling;
an electronic module connected to the transducer;
a data acquisition module connected to the electronic module; and
a data cable connected to the electronic module and the data acquisition module. - View Dependent Claims (70)
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Specification