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  • Title: True knot of the umbilical cord: a report of 13 cases.
    Author: Szczepanik ME, Wittich AC.
    Journal: Mil Med; 2007 Aug; 172(8):892-4. PubMed ID: 17803086.
    Abstract:
    True knots of the umbilical cord are complications that can result in obstetric disasters, including fetal asphyxia and eventual fetal death. This study reports on 13 patients with a true knot of the umbilical cord in a delivery population of 967 deliveries during a 1-year period. In this group, there was one second-trimester fetal demise, four cases of fetal distress during labor necessitating cesarean delivery, and eight cases with a true knot found incidentally at delivery. No abnormal sequelae were found for the 12 viable newborns. True knots of the umbilical cord can be incidental findings; however, a tightened knot is reported to be associated with a fourfold increased risk of fetal death. Prenatal fetal surveillance, including targeted sonographic examination and Doppler studies, may identify true knots of the umbilical cord. Identification of high-risk patients and clinical expertise in the management of these patients have not been established.
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