Abstract
Two neural net architectures are applied to the problem of detecting artifacts in pulsatile pressure waveforms emanating from catheters in anesthetized patients awaiting cardiac surgery. A three-layer back-propagation network with 21 nodes in each layer satisfactorily detected all artifacts and falsely characterized none of the patterns. A competitive learning network, although easier to build and train, did not perform nearly so well. In both cases, the networks were trained on one set of data and tested on a different set. Both sets of data were taken from an anesthetized patient about to undergo cardiac surgery.

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