Endotracheal cardiac monitor

Details Endotracheal cardiac monitor Endotracheal cardiac monitor

1989-03-30

1991-07-09

Cohen, Lee S.

Surgery

Truss

Pad

128773, 12820715, 604 96, A61B 502

Patent

active

050295918

ABSTRACT:
A flexible endotracheal tube is disclosed for acoustically monitoring the heart sounds of a patient. The tube comprises a flexible conduit to provide a respiratory passage and a separate cardiac sound passage conduit. An inflatable cuff is disposed near the distal end of the flexible conduit to contact and sealingly conform to the interior wall of the trachea upon inflation. The closed chamber of the inflatable cuff is in fluid communication with the separate sound passage for enhanced acoustic reception from the inflatable cuff. The distal end of the sound passage conduit includes a terminal end defining an angular cut to enhance the acoustic reception of the heart sounds acoustically transmitted from the interior tracheal wall through the inflatable cuff and into the acoustically separate conduit. The sound conduit extends longitudinally with the respiratory conduit and is constructed within an enlarged wall forming one side of the respiratory conduit to provide a figure eight configuration in cross section such that the two conduits mean are acoustically separate from each other but contained within the same endotracheal tube. A means for permitting the pressurizing of the sound conduit and a means for permitting the monitoring of pressure variations within the conduit is also disclosed.

REFERENCES:
patent: 541901 (1895-07-01), Thornton
patent: 3731692 (1973-05-01), Goodyear
patent: 3766927 (1973-10-01), Jackson
patent: 4331156 (1982-05-01), Apple et al.
patent: 4383534 (1983-05-01), Peters

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