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Fetoscopic visualization in second-trimester pregnancies.

D B Schwartz, W J Zweibel, D Donovan

    American Journal of Obstetrics and Gynecology
    |January 1, 1983
    PubMed
    Summary
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    Fetoscopic visualization, guided by real-time ultrasound, enables prenatal diagnosis of fetal malformations after 18 weeks gestation. Advancing gestational age showed no significant impact on visualization success rates.

    Area of Science:

    • Medical Imaging
    • Prenatal Diagnosis
    • Fetal Surgery

    Background:

    • Ultrasound limitations in defining external fetal malformations necessitate advanced diagnostic methods.
    • Fetoscopy offers direct visualization but requires precise guidance for safety and efficacy.

    Purpose of the Study:

    • To evaluate the feasibility and success rates of ultrasound-guided fetoscopy for prenatal diagnosis.
    • To assess the impact of gestational age on visualization success.
    • To analyze the influence of placental position on the procedure.

    Main Methods:

    • Real-time ultrasound guidance employed during fetoscopic procedures.
    • Gestational age and placental position recorded for correlation analysis.
    • Successful visualization and procedural complications documented.

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    Main Results:

    • Successful visualization achieved in pregnancies over 18 weeks' gestation.
    • Advancing gestational age between 18 and 23 weeks did not significantly affect visualization success.
    • Anterior placenta did not impede access for visualization or blood sampling.

    Conclusions:

    • Ultrasound-guided fetoscopy is a viable technique for prenatal diagnosis of external fetal malformations.
    • The procedure is effective across a range of gestational ages (18-23 weeks) and placental positions.