Method and apparatus for estimation of beat-to-beat pulmonary we

Details Method and apparatus for estimation of beat-to-beat pulmonary we Method and apparatus for estimation of beat-to-beat pulmonary we

1999-08-10

2000-09-05

O'Connor, Cary

Surgery

Diagnostic testing

Cardiovascular

600500, A61B 502

Patent

active

061135488

ABSTRACT:
A medical device for estimation of pulmonary wedge pressure wherein a non-occluded pulmonary artery blood pressure measurement is utilized to directly estimate the pulmonary wedge pressure. A neural network is trained with occlusion-obtained data, whereafter the trained coefficients are utilized to implement the wedge pressure estimator. A flow-directed catheter is utilized to transduce the pressure waveform, which is then input to the processing computer through a analog-to-digital data acquisition board. The data is preprocessed in the computer in order to present the neural network with 11 samples of blood pressure data and 11 samples of time-correlated first derivatives of the blood pressure data as well as an indication of the length in time of the heartbeat. The trained neural network then directly outputs the estimated wedge pressure.

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patent: 5046505 (1991-09-01), Sekii et al.
patent: 5423323 (1995-06-01), Orth

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