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US 6,632,181 B2Granted
Rapid non-invasive blood pressure measuring device
AssigneeMasimo Corporation
InventorsBryan Patrick Flaherty, Mark Henry Sher, Richard G. Caro
Life of this patent
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AssigneeMasimo Corporation
InventorsBryan Patrick Flaherty, Mark Henry Sher, Richard G. Caro
Estimating the term…
A blood pressure can be obtained by supplying an external pressure to a portion of an artery. The external pressure is preferably between the systolic and diastolic pressure. An event which occurs at least once a cycle can then be identified. This event can be, for example, a peak in the arterial compliance that occurs at a transmural pressure approximately equal to zero. A pair of signals, one that is an arterial volume-indicating signal, and one that is an arterial pressure-indicating signal can be used to identify this event. Alternately, a small signal high-frequency exciter component can be placed upon the pressure or volume of the artery and detected to determine the time that the transmural pressure is equal to zero.
A measurement device for generating an arterial pressure-indicative signal and an arterial volume-indicative signal that are used by a processor in concert with a external pressure-application device and a pressure transducer to determine the blood pressure of a patient by finding a time when the transmural pressure is approximately equal to zero, the measurement device comprising:
A method of determining the blood pressure of a patient from an arterial pressure-indicative signal and an arterial volume-indicative signal, the method comprising:
Dependencies are inferred from the claim text.