Other

Shanli Corporation

G Gilbert Johnston

William Michael Dieter

Robert R McAusland

An infant seat (10) is disclosed for use with a vehicle seat (12) and seat belt (14) to restrain and protect an infant in the event the vehicle undergoes a sudden change in velocity. The seat (10) includes a foldable frame (16), preferably formed from a single sheet of material, and including a plurality of living hinges that flexibly join the various sections of the frame. A pair of arms (18 and 20) are included to lock the frame in an open position and include slots designed to engage the seat belt.

Folding infant restraint seat

A catheter, particularly adapted for cardiac output determination, comprises an elongated tube of flexible material, the tube having a substantially rigid distal portion on which is disposed an ultrasonic transducer and a proximate, inflatable balloon. The ultrasonic transducer is arranged so as to direct a beam of ultrasound toward a transverse plane that bisects the balloon, and is connected by appropriate leads to a conventional Doppler circuit. With the balloon deflated, the signal from the Doppler circuit is sensed to measure blood velocity. Thereafter, the balloon is inflated so that it has a predetermined cross-sectional area in the transverse plane. The signal from the Doppler circuit is again sensed to measure blood velocity. Using a simple mathematical relationship, the effective internal cross-sectional area of the blood vessel is determined from the two measured velocities and from the predetermined cross-sectional area of the balloon when inflated. The volumetric flow rate is then determined by multiplying the first measured velocity by the effective internal cross-sectional area.

Catheter for performing volumetric flow rate determination in

Volumetric flow rate determination in conduits not directly accessible

A catheter, particularly adapted for cardiac output determination, comprises an elongated tube of flexible material, the tube having a substantially rigid distal portion on which is disposed an ultrasonic transducer and a proximate, inflatable ballon. The ultrasonic transducer is arranged so as to direct a beam of ultrasound toward a transverse plane that bisects the balloon, and is connected by appropriate leads to a conventional Doppler circuit. With the balloon deflated, the signal from the Doppler circuit is sensed to measure blood velocity. Thereafter, the balloon is inflated so that it has a predetermined cross-sectional area in the transverse plane. The signal from the Doppler circuit is again sensed to measure blood velocity. Using a simple mathematical relationship, the effective internal cross-sectional area of the blood vessel is determined from the two measured velocities and from the predetermined cross-sectional area of the balloon when inflated. The volumetric flow rate is then determined by multiplying the first measured velocity by the effective internal cross-sectional area.

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Federal Way, WA, United States of America

G Gilbert Johnston