Surgery – Diagnostic testing – Cardiovascular
Patent
1998-10-16
2000-10-17
Nasser, Robert L.
Surgery
Diagnostic testing
Cardiovascular
600500, 600503, A61B 500
Patent
active
061323829
ABSTRACT:
A non-invasive blood pressure sensor includes a first fluid filled sensing chamber having a diaphragm. A first transducer is fluidly coupled to the first sensing chamber to sense fluid pressure within the first chamber. A flexible body conformable wall surrounds the sensing chamber. The wall applies force to the artery while preventing pressure in a direction generally parallel to the artery from being applied to the sensing chamber. The flexible body conformable wall includes a second fluid filled chamber. A second transducer fluidly coupled to the second chamber sensing fluid pressure within the second chamber. As varying pressure is applied to the artery pressure waveforms are sensed by the first transducer. Using output signals of the first and second transducers, the sensed pressure waveform data is analyzed to derive waveform parameters from which blood pressure values are derived. The effects of motion artifacts are reduced by the use of signals from both the first and second transducers.
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Archibald G. Kent
Curran Timothy G.
Danielson Orland H.
Poliac Marius O.
Thede Roger C.
Medwave, Inc.
Nasser Robert L.
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