CTG-Cardiotocography Flashcards
What is the purpose of a CTG?
To identify if there are concerns for fetal well-being
This CTG is from a Primpgravid wahine at 26wks gestation being monitored following an emergency appendicectomy under GA. What are the concerning features
- Baseline 160bpm-164bpm
- variability absent
- no accelerations
What are the 5 identifying factors when interpreting a CTG?
- Baseline
- Variability
- Accelerations
- Decelerations
- Contractions
This is from previous scenario.
Is this a normal CTG considering the clinical picture?
- Considering the clinical picture it is physiologically
and reasonable. - Continue to monitor and consult
CTG was recorded from a multip 41 wks gestation is in early labour. normal healthy pregnancy. She reported reduce fetal movements over the last 24hrs. The LMC reported fetal tachycardia by auscultating. What are the concerning features?
- a baseline of 160bpm - 165bpm
- no variability
- no accelerations present
From previous card what would your next steps be?
- Continuous monitor
- Consult with Obstetric team
- Discuss fluid intake
- Move to left lateral if not currently there
Normal range of variability?
5bpm -25bpm
Normal Range of Accelerations?
- 15bpm
Definition of a prolonged deceleration?
- A fall in the baseline fetal heart rate for more than 90 seconds
and up to 5 minutes
Uniform, repetitive decreasing of FHR with, usually, slow onset mid to end of the contraction and nadir more than 20 seconds after the peak of the contraction and ending is considered what on a CTG?
- Late decelerations
What are some features that increase the likelihood of fetal hypoxia?
- Rising baseline rate or fetal tachycardia.
- Reducing baseline variability.
- Slow return to baseline FHR after the end of the contraction.
- Large amplitude (by 60 bpm or to 60 bpm) and/or long
duration (60 seconds). - Presence of smooth post deceleration overshoots (temporary
smooth increase in FHR above baseline).
