Device for noninvasive measurement of the blood pressure, in particular for the continuous monitoring of ambulatory blood pressure for an ambulatory patient
First Claim
1. A device for the noninvasive measurement of a patient'"'"'s blood pressure, comprising:
- at least one sensor to be placed on a thoracic wall of a patient, said sensor being responsive to acoustic signals generated by the closing of the patient'"'"'s cardiac valves and transmitted through the thorax, and producing an electronic phonocardiographic signal corresponding to said detected acoustic signals;
discriminating means for identifying and extracting from the phonocardiographic signal a vibratory profile related to a second cardiac noise periodically produced at the end of the systole, and means for analyzing at least one predetermined parameter of the vibratory profile and, in response, delivering according to said at least one parameter, a phono-arterial index value representative of the patient'"'"'s blood pressure.
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Accused Products
Abstract
A device for noninvasive measurement of blood pressure, in particular for continuous monitoring of blood pressure for an ambulatory patient. This device includes at least one sensor, placed on the thoracic wall of a patient, that is able to transform the acoustic signals generated by the closing of the cardiac valves and transmitted through the thorax into an electronic phonocardiographic signal. The phonocardiographic signal is processed to discriminate and extract a vibratory profile (18) related to the cardiac noise periodically produced at the end of the systole. At least one predetermined parameter of the vibratory profile is analyzed, in particular the amplitude (20) separating the extrema from the signal, and according to this parameter, a value of the phono-arterial index representative of the blood pressure is delivered.
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Citations
20 Claims
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1. A device for the noninvasive measurement of a patient'"'"'s blood pressure, comprising:
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at least one sensor to be placed on a thoracic wall of a patient, said sensor being responsive to acoustic signals generated by the closing of the patient'"'"'s cardiac valves and transmitted through the thorax, and producing an electronic phonocardiographic signal corresponding to said detected acoustic signals;
discriminating means for identifying and extracting from the phonocardiographic signal a vibratory profile related to a second cardiac noise periodically produced at the end of the systole, and means for analyzing at least one predetermined parameter of the vibratory profile and, in response, delivering according to said at least one parameter, a phono-arterial index value representative of the patient'"'"'s blood pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification