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Related Experiment Videos

Ultrasonic blood flow measurements: transcutaneous compared with implanted cuff

E R Greene, M B Histand, C W Miller

    ISA Transactions
    |January 1, 1976
    PubMed
    Summary

    This study validates the less invasive transcutaneous ultrasound probe by comparing its flow parameter measurements to those from implanted ultrasonic cuffs. Results show a strong correlation, confirming the transcutaneous method

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    Area of Science:

    • Biomedical Engineering
    • Cardiovascular Physiology
    • Medical Imaging

    Background:

    • Accurate measurement of blood flow parameters is crucial for diagnosing and managing cardiovascular diseases.
    • Implanted ultrasonic cuffs offer precise measurements but require invasive surgery.
    • Transcutaneous ultrasound probes provide a less invasive alternative, but their accuracy needs validation against established methods.

    Purpose of the Study:

    • To establish the relationship between flow parameters derived from implanted ultrasonic cuff signals and transcutaneous probe measurements.
    • To validate the accuracy and reproducibility of the transcutaneous ultrasound method for assessing blood flow.

    Main Methods:

    • Analog signals were collected from surgically implanted ultrasonic crystals on a beagle dog's carotid artery, femoral artery, and abdominal aorta.

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  • Simultaneously, transcutaneous ultrasound measurements were performed near the implanted probe locations.
  • Key flow parameters including spatial velocities, velocity profiles, diameters, flow rates, and velocity frequency distributions were calculated from both signal types.

    • Main Results:

    • A strong correlation was observed between the flow parameters calculated from implanted cuff signals and transcutaneous probe measurements.
    • The transcutaneous method demonstrated high reproducibility across multiple measurements.
    • Calculated parameters included spatial velocities, velocity profiles, diameters, flows, and velocity frequency distributions.

    Conclusions:

    • The transcutaneous ultrasound probe method is a valid and reliable technique for measuring cardiovascular flow parameters.
    • The findings substantiate the use of the less traumatic transcutaneous approach, offering a viable alternative to invasive methods.
    • This validates the transcutaneous method for future cardiovascular research and clinical applications.