![]() ![]() In a prospective demo by Sepulveda et al., velamentous cable insertion was detected making use of colour Doppler with a sensitivity of 100%, specificity of 99.8%, optimistic predictive worth of 83%, and bad predictive value of 100%. 9In inclusion, a vasa previa can become distinguished from a funic presentation by modifying the mother's place or putting her in the Trendelenburg position, as the umbilical wire should move in the environment of a funic presentation. Pulsed Doppler can become used to differentiate from maternal boats by demonstrating a rate consistent with the fetal coronary heart. Medical diagnosis is structured on the id of membranous fetal boats transferring across, or within 2 cm, of the internal os ( Figs. 8 As soon as a velamentous cable insertion or an accessories placental lobe is definitely visualized, transvaginal sonography with color Doppler should become carried out to appear specifically for vasa previa 8( Fig. A velamentous cable insertion can be characterized by splaying of the ships at the periphery of the placenta. During an anatomic survey of the baby, a detailed assessment of the placenta and placental wire installation should end up being performed.
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