EKG and ultrasonoscope display

Claim 1

An improved biomedical diagnostic instrument including an ultrasonoscope system for simultaneously displaying a cross-sectional image of an internal organ and an EKG waveform on a single cathode ray tube, comprising: a plurality of ultrasonic transducer means arranged in a row and adapted to be positioned on a patient's body for transmitting ultrasonic impulses into and receiving reflected ultrasonic impulses from said internal organ, control means coupled to said transducer means for sequentially energizing said transducer means, receiver means coupled to said transducer means for receiving said reflected ultrasonic impulses, cathode ray tube display means coupled to said receiver means for displaying said cross-sectional image of said internal organ, Ekg monitor circuit means including electrodes adapted to be coupled to said patient for monitoring biological electrical signals thereof, Ekg logic circuit means coupled to said EKG monitor circuit means, to said receiver means and to said cathode ray tube display means for enabling simultaneous real-time display of both said cross-sectional image of said internal organ and said EKG waveform on said cathode ray tube. said EKG logic circuit means including first, second and third interconnected one-shot pulse generators for producing pulses of predetermined duration, and first and second analog gating means for respectively gating first and second analog signals therethrough, said third one-shot pulse generator being coupled to said first and second analog gating means for controlling the passage of said analog signals, said second and third one-shot pulse generators being connected in parallel to the output of said first one-shot pulse generator for triggering by said first one-shot pulse generator, said cathode ray tube means including a sweep generator and a staircase voltage generator, said first analog gating means being coupled to said sweep generator for gating the output thereof, said second analog gating means being coupled to said staircase voltage generator for gating the output thereof, and summing amplifier means coupled to said first and second analog gating means for summing the gated outputs thereof.