Neonatology Flashcards
What is surfactant produced by
Type 2 alveolar cells
How does surfactant effect lung surface tension
Reduces it
Why is high surface tension an issue in lungs
Water in lungs
Water attracts each other
On either side of sacs
Closes alveoli sacs
How does surfactant effect compliance
Increases compliance
Less force needed to expand alveoli
When is surfactant produces and fully equipped
24 - 34 weeks gestation
What does hypoxia in birth lead to
Hypoxic-ischaemia encephalopathy
THEN CP
Why do babies get cold when born
Large surface to weight ratio when born
And wet
1st thing to do when a baby is born and not breathing
vigerious rubbing/ drying
BEFORE A-E/ 5 RESCUE BREATHS
When should a Apgar score be calculated
1, 5 and 10 minutes
What should be done after drying if baby is not breathing
5 breaths
Reassess
5 breaths
3:1 CPR
Then chest compressions
Acceptable pre ductal sats at 2 mins and when should they be 100%
65%
10 mins (or sooner!!)
In a newborn what bpm would indicate need for CPR
Less than 60
5 components of APGAR
Appearance (colour) Pulse Grimmace Activity Respiration
One possible negative of delayed cord clamping
May be associated with higher rates of neonatal jaundice
How soon should the newborn exam be after birth
72 hours
When is the newborn heel prick test taken
Day 5
Can be upto 8
How long does it take for newborn heel screening test to come back
6-8 weeks
What should babies o2 sats be on newborn exam
Pre and post ductal
Above 96% with no less than 2 % difference