Surgery – Respiratory method or device – Respiratory gas supply means enters mouth or tracheotomy...
Patent
1989-11-22
1991-12-31
Burr, Edgar S.
Surgery
Respiratory method or device
Respiratory gas supply means enters mouth or tracheotomy...
12820714, A61M 1600
Patent
active
050762680
ABSTRACT:
Blood flow in the aorta and pulmonary artery of a mammal, most typically a human, is measured volumetrically be a non-invasive, ultrasound apparatus. The apparatus (10) comprises a tracheal tube or probe with of flexible tubing (11) having a transducer assembly (21) mounted at one end the tube. The transducer assembly (21) is disposed to transmit ultrasound in selected directions. Electrical conductors (24) extend the length of the probe from the transducer assembly. Improved means is provided to positively locate the probe in the trachea and to urge the ultrasound transducer assembly (21) into intimate contact with the inner wall of the trachea. The improved location and urging means comprises a single inflatable asymmetric balloon cuff member (29) mounted on the tube (11) in proximity to and above the transducer assembly (21) and extending around the entire periphery of the tube, the balloon being mounted on the tube such that when inflated the balloon sealingly engages the tracheal wall while urging the transducer assembly into contact with the inner wall of the trachea.
The asymmetric balloon cuff is conveniently formed in a mold prepared by angularily sectioning the conical portion of a pair of funnel shaped mold forms at equal angles relative to the central axis thereof, rotating one of the sectioned funnel forms 180.degree. about the axis and then joining the two forms at the section plane to form the balloon cuff mold form.
REFERENCES:
patent: 4091816 (1978-05-01), Elam
patent: 4327720 (1982-05-01), Bronson et al.
patent: 4700700 (1987-10-01), Eliachar
patent: 4886059 (1989-12-01), Weber
Applied Biometrics Incorporated
Burr Edgar S.
Lewis Aaron J.
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