true knot

(redirected from true knot of umbilical cord)

true knot

, true knot of umbilical cord
actual intertwining of a segment of umbilical cord; circulation is usually not obstructed.
A knot of the umbilical cord at various places along its length and with varying degrees of tightness; oedema, grooving, narrowing, tightness, and differences of colour and/or diameter on the opposite sides of the knot may indicate vascular obstruction. In true knots, the placental disk is congested
Prognosis The consequences to the infant hinge on the tightness of the knot; tight knots cause foetal demise

true knot

True umbilical cord knot Neonatology A knot of the umbilical cord at various locations and degrees of tightness; edema, grooving, narrowing, tightness, and differences of color and/or diameter on the opposite sides of the knot may indicate vascular obstruction; the placental disk is congested Prognosis Consequences hinge on the tightness of the knot; tight knots cause fetal demise. Cf False knot.

true knot

A knot formed by the fetus slipping through a loop of the umbilical cord.
See also: knot
Mentioned in ?
References in periodicals archive ?
True knot of umbilical cord (TKUC) is a rare abnormality.
Most knots are loose with no clinical significance, though there exists an association between cord knots and intrauterine death.2 True knot of umbilical cord is associated with four fold increase risk of intrauterine foetal death.3 A case of "hanging injury" from a tightened true knot of the umbilical cord which resulted in intrauterine foetal demise has been reported from Virgini.4 Similarly Sharma et al presented a case of a 20 years old primigravida who delivered a baby with true knot of umbilical cord.5 Author is presenting two cases of TKUC not diagnosed on antenatal ultrasound.