true knot


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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
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