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Related Experiment Videos

Urography with metrizamide in children

R L Siegle, P Davies, G D Fullerton

    AJR. American Journal of Roentgenology
    |November 1, 1982
    PubMed
    Summary

    Metrizamide, a nonionic contrast agent, offers excellent pediatric urography results without osmotic diuresis. This method allows for reduced radiation exposure through higher kilovoltage techniques, enhancing safety in pediatric imaging.

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    Area of Science:

    • Radiology
    • Pediatric Imaging
    • Contrast Media

    Background:

    • Pediatric urography traditionally involves risks of osmotic diuresis and fluid loss.
    • Nonionic contrast agents offer potential advantages in pediatric applications.

    Purpose of the Study:

    • To evaluate the efficacy and safety of metrizamide for pediatric excretory urography.
    • To assess the impact of metrizamide on serum osmolality and urinary tract opacification.
    • To explore the potential for radiation dose reduction using higher kilovoltage techniques with metrizamide.

    Main Methods:

    • Excretory urograms were performed on 23 children using metrizamide (300 mg I/ml) at a dose of 2.2 ml/kg.
    • Serum osmolality was monitored.
    • Radiographs were analyzed for urinary tract opacification, calyx distention, ureteral appearance, and bladder distention.
    • In vitro studies assessed radiation dose reduction with higher kilovoltage.

    Main Results:

    • Metrizamide provided excellent urinary tract opacification without altering serum osmolality.
    • Sharp calyces were observed, though undistended, with increased ureteral ridging.
    • Urinary bladders were often undistended post-procedure.
    • Higher kilovoltage techniques with metrizamide demonstrated significant radiation dose reduction potential.

    Conclusions:

    • Metrizamide is a valuable nonionic contrast agent for pediatric urography, minimizing osmotic effects.
    • The technique allows for enhanced opacification and potential for reduced radiation exposure in children.
    • Further investigation into optimal dosing and imaging parameters is warranted.

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