Four-dimensional ultrasonography of a true knot of the umbilical cord.

Ramón y Cajal, Carlos López; Martínez, Raquel Ocampo · Am J Obstet Gynecol · 2006

case_report · Level V

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Abstract

We describe the prenatal diagnosis of a true knot of the umbilical cord using the "hanging noose" sign. Changes in the tension of the knot, which are related to fetal movements, were studied with 4-dimensional ultrasonography.

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