Fetal Monitoring Flashcards
How would you monitor the fetus in a low risk labour?
Intermittent auscultation
How would you monitor the fetus in a high risk or abnormal labour?
Cardiotocography (CTG)
What is the function of Cardiotocography (CTG)?
Records pressure changes in the uterus using internal or external pressure transducers
What does Cardiotocography (CTG) represent?
Autonomic and central nervous system activity
What is the normal fetal heart rate?
100-160/min
When is a doppler ultrasound used?
For 1 minute after every contraction
When would you use a doppler ultrasound after the first stage of labour?
Every 15 minutes
When would you use a doppler ultrasound after the second stage of labour?
Every 5 minutes
What would you do if there are any abnormalities or intrapartum complications?
A cardiotocography (CTG)
What are some indications for cardiotocography (CTG)?
- Induction of labour
- Post-maturity (>42 weeks) or prematurity (<37 weeks)
- Multiple pregnancy
- Underlying maternal health condition- Pre-eclampsia or diabetes
- Abnormal lie
- Epidural anaesthesia
- Antepartum or intrapartum haemorrhage
What can a fetal blood sample be used to confirm the CTG diagnosis of?
Fetal hypoxia
What is the normal pH of fetal blood?
pH 7.25
What would you do if the fetal blood pH >7.25?
Repeat in 1 hour if CTG remains abnormal
What would you do if the fetal blood pH 7.21-7.24?
Repeat in 30 mins if CTG remains abnormal
What would you do if the fetal blood pH <7.20?
Immediate delivery
pH indicates that baby doesn’t have enough oxygen