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Medical measuring apparatus

  • US 4,370,985 A
  • Filed: 04/21/1980
  • Issued: 02/01/1983
  • Est. Priority Date: 04/26/1979
  • Status: Expired due to Term
First Claim
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1. A medical measuring apparatus comprising:

  • a probe adapted to be held in contact with a body surface of a patient adjacent a blood vessel, said probe having mounted therein to be in alignment with the blood vessel (a) an ultrasonic transmitting oscillating element inclined to be at an acute angle to the blood vessel (b), a pair of ultrasonic wave receiving oscillating elements arranged in front and rear of said transmitting oscillating element and inclined to be at acute angles to the blood vessel and (c), an ultrasonic wave transmitting and receiving oscillating element located at one side of one of said pair of receiving oscillating elements to be at right angles to said blood vessel, each of said ultrasonic transmitting oscillating element and said pair of ultrasonic wave receiving elements having a length at least equal to the diameter of said blood vessel;

    first means for continuously driving said ultrasonic wave transmitting oscillating element to emit a continuous ultrasonic wave;

    second means for intermittently driving said ultrasonic wave transmitting and receiving oscillating element to emit a pulsating ultrasonic wave;

    said pair of receiving elements receiving a continuous ultrasonic wave reflected from the blood flow,said transmitting and receiving oscillating element receiving a pulsating ultrasonic wave reflected from the blood vessel;

    third means for receiving an output from said pair of receiving elements and generating a signal representing blood flow speed;

    fourth means for receiving an output from said transmitting and receiving oscillating element and producing a signal output representing blood vessel diameter deviation and a pulse output having a width corresponding to the blood vessel diameter;

    fifth means for producing a signal representing blood flow amount from the signals delivered from said third and fourth means;

    sixth means for controlling said third and fourth means in response to an electrocardiogram output of the patient;

    a first cathode ray tube for displaying the signals representing the blood flow speed, blood flow amount and blood vessel diameter deviation; and

    a second cathode ray tube for displaying the signal representing the blood vessel diameter deviation output and also displaying the pulse output having the width corresponding to the blood vessel diameter.

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