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A 38 year old multigravida (gravida:4, para:2+1, live:1) with nonsevere pre-eclampsia presented at 34 weeks gestation with reduced fetal movements [RFM]. Admission cardiotocography was reactive. Obstetric ultrasound showed weight on 1st centile. Dopplers showed cerebroplacental ratio of 0.9 suggestive of brain sparing. Umbilical artery pulsatility index was at 96th centile, with forward flow in diastole. In view of the persistent complaint of RFM, it was jointly decided to expedite delivery of the fetus. Per operatively, a true knot was present around 10 cms from the umbilical end with blanching proximal to the knot. The baby was delivered active, with an Apgar score of 6 and 7 at 1 and 5 minutes respectively. [ABSTRACT FROM AUTHOR]

True knots of the umbilical cord (UC) are a rare occurrence and are reported in 0.4–1.2% of deliveries. The compression of true knot of the UC can cause obstruction of the fetal circulation, leading to intra-uterine growth retardation or fetal death. Predisposing factors for the genesis of the true UC knot are numerous and include all the conditions, which lead to a relatively large uterine volume. This situation may predispose to free and excessive fetal movements. Although not all true knots lead to perinatal complications, they have been associated with adverse pregnancy outcomes, including fetal distress, fetal hypoxia, intra-uterine growth restriction (IUGR), long-term neurological damage, caesarean delivery and stillbirth. We present a rare case of operative delivery with vacuum in a multiparous woman at term of pregnancy with a double true knot of the UC. As in most cases, the diagnosis was made after delivery, as there were no fetal symptoms during pregnancy. Some authors assume that 3D power sonography may be useful in the diagnosis of true UC knots. However, 3D power Doppler cannot be considered as a definitive method. There are no specific prenatal indications to induce the physician to look for ultrasound signs suggestive of umbilical true knot. Some studies argue that cases of fetal death and fetal risk are directly related to the number of knots. We also support this thesis, even if further observational and retrospective studies are needed to demonstrate it. [ABSTRACT FROM AUTHOR]

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True umbilical cord knot appears to be a relatively common complication that occurs in 0.3%-1.3% of all pregnancies and it is correlated with an increased incidence of SGA infants, premature birth, need for neonatal intensive care and fetal death. The aim of the article was to evaluate the incidence of the true umbilical cord knot in the University Emergency Hospital, Bucharest, for a period of 5 years and its association with premature birth, low birth weight, low Apgar score at 1 minute and the need for neonatal intensive care. By reviewing the total number of women who delivered in this unit between January 1st 2011 and December 31st 2015, the percentage of the diagnosis antepartum and intrapartum, the outcome of these pregnancies, and the reflection of this condition on the fetal status, were evaluated. During 5 years, 133 (0.71%) of 18.500 deliveries were diagnosed with true umbilical cord knot, only 16 (0.08%) cases were diagnosed by ultrasound antepartum. The mean maternal age was 34.3 years. About 30% of the studied cases (39) presented this condition at the third delivery or more. A personal history for diabetes corresponded to 27 cases (20.3%). From our database, it resulted that only 12 fetuses (10.5%) required neonatal intensive care and presented an Apgar score lower than 7 at 1 minute. Prenatal diagnosis of a true umbilical cord knot is rarely encountered and sonography skills are needed. Complementary methods such as color Doppler and 3D HD Flow are reliable for the diagnostic when true umbilical cord knots are suspected after a 2D scan. Several risk factors can guide the expectancy, such as advanced maternal age, polyhydramnios, multiparty or diabetes. [ABSTRACT FROM AUTHOR]

Objective: To examine the association between an umbilical artery notch and fetal deterioration in monochorionic/monoamniotic (MC/MA) twins. Methods: Six MC/MA twin pregnancies were admitted at 24-28 weeks of gestation for close fetal surveillance until elective delivery at 32 weeks or earlier in the presence of signs of fetal deterioration. Ultrasound (US) examinations were performed twice weekly. The presence of cord entanglement, umbilical artery notch, abnormal Doppler parameters, a non-reassuring fetal heart rate pattern, or an abnormal fetal biophysical profile were evaluated. Results: Umbilical cord entanglement was observed on US in all pregnancies. The presence of an umbilical artery notch was noted in four out of six pregnancies and in two of them an umbilical artery notch was seen in both twins. The umbilical artery pulsatility index was normal in all fetuses. Doppler parameters of the middle cerebral artery and ductus venosus, fetal biophysical profile and fetal heart rate monitoring remained normal until delivery in all pregnancies. All neonates experienced morbidity related to prematurity; however, all were discharged home in good condition. Conclusion: The presence of an umbilical artery notch and cord entanglement, without other signs of fetal deterioration, are not indicative of an adverse perinatal outcome. © 2014 S. Karger AG, Basel [ABSTRACT FROM AUTHOR]

Prenatal diagnosis of a true knot of the umbilical cord is often an incidental observation at ultrasound with a difficult differential diagnosis between true and false knots. Furthermore, little is known about the optimal management of these cases. We report the importance of color Doppler and four-dimensional ultrasound for the differential diagnosis in the case of true cord knot and the role of Doppler flow velocimetry in the management of that case. [ABSTRACT FROM AUTHOR]