OBG Viva

What is CTG?

It's a method of fetal well-being assessment, to monitor the fetal heart rate in relation to the uterine contraction.


What are the characteristics of REACTIVE CTG?

Baseline variability of 5-25 bpm
Baseline rate of 110-150 bpm
> 2 accelerations in 20 min CTG trace
Absence of decceleration

What is the false positive percentage in a non-reactive CTG?

50%.

What are the types of decceleration in CTG?

Early deceleration
Late deceleration
Variable deceleration

Mention ONE clinical scenario for each deceleration and the underlying cause for it.

Early deceleration - 2nd stage of labour, due to fetal head compression against maternal pelvis, causing vagal stimulation

Late deceleration - Fetal distress (hypoxia, acidosis)

Variable deceleration - IUGR, Cord prolapse, Oligohydramnios

What is a Partograph?







Partograph is a graphical representation of the progress of labour against time in hours

What are the important parameters you monitor in partograph and how frequently?

Blood pressure and Pulse rate every 2 hours
Cervical dilatation every 4 hours
Station every 4 hours
Uterine contraction (strength and frequency) every 1/2 hour
Fetal heart rate every 1/2 hour

What is the significance of ALERT line and ACTION line in a set up like Jasin Hospital?

Both line indicates the need of labour augmentation and appropriate referral to a Tertiary Hospital

What is the rate of cervical dilatation in primi and multi in active phase of 1st stage of labour?

For primi - 1cm/hr
For multi - 1.5cm/hr

What is the significance of Meconium Stained Amniotic Fluid/Light meconium stained liqour?

Fetal hypoxia leading to acidosis, causing hyper-stimulation and eventual relaxation of fetal anal sphincter, leading to passage of meconium into the liqour.

Category: Gynecology Notes , Obstetrics Notes