A 28 -year-old woman, G4P3L2A1 at 35 weeks of gestation with monochornionic monomniotic twin pregnancy was admitted for safe confinement. 3 days following admission, the NST showed the following finding: What is the finding shown in the NST?
The deceleration first shows a rapid rise and rapid fall. Secondly it is unrelated to the peak of uterine contraction. In early and late deceleration, there would be a slow fall and slow rise. Early would show an onset before or at peak of uterine contraction and the FHR would return to normal after the end of uterine contraction. VARIABLE DECELRATION Inconsistent time of onset when compared to uterine contraction The onset of deceleration commonly varies with successive contractions. The duration is less than 2 minutes. Represent fetal hea rate reflexes that reflect either blood pressure changes due to interruption of umbilical flow or changes in oxygenation. Significant variable decelerations are those decreasing to less than 70 beats/min and lasting more than 60 seconds. Causes: Umbilical cord entanglement like due to: - 1. - Umbilical around body or neck 2. - True knot in the umbilical cord 3. - Prolapsed umbilical cord
Reactive NST
Variable deceleration
Early deceleration
Sinusoidal pattern.
Integrated QBank