Neonataology Flashcards
Define preterm
<37 weeks
define very preterm
<32 weeks
define extremely preterm
<28 weeks
define term
37-42 weeks
define post term
> 42 weeks
define foetal loss
<23 weeks
define low birth weight
<2.5kg
define very low birth weight
<1.5kg
define extremely low birth weight
<1kg
define small for gestational age
<10th centile in weight for expected gestation
define appropriate for gestational age
10-90th centile in weight for gestation
define large for gestational age
> 90th centile in weight expected for gestation
RF for preterm births
multiple pregnancy uterine/cervical pathology chronic health conditions in mother e.g. BP, DM, clotting infections in pregnancy smoking, alcohol, illicit drugs idiopathic
most preterm babies <28wk will need help with transitioning to air breathing, this is called resuscitation, true or false
false, not resuscitation
what is the difference between preterm and term babies when they are born
preterm: get colder faster more fragile lungs dont breathe effectively fewer reserves
why is cord clamping delayed for a minute in premature babies
to allow placental transfusion
‘optimal cord clamping’
how can you keep the preterm baby warm during cord clamping
place them in a plastic bag while still wet under a radiant heater
reduces heat loss from convection and evaporation
how do you manage the airway in a premature newborn
neutral head positioning - over extension will block the airway
jaw thrust
suction, gentle and only if secretions are present
what can happen if the premature newborns lungs are overinflated
damage leading to inflammation and long term morbidity (broncho pulmonary dysplasia)
common concerns in the preterm infant
temp control feeding and nutrition - late sucking reflex sepsis system immaturity - RDS - PDA - IVH - NEC Metabolic ROP
hypothermia in a preterm infant increases severity of all preterm morbidities, true or false
true
why is thermal regulation in preterm babies ineffective
low BMR
minimal muscular activity
SC fat negligible
high SA:bodymass ratio
methods of warming a preterm baby
skin to skin
plastic bag / wrap
transwarmer mattress
prewarmed incubator
why are preterm babies at risk of nutritional compromise
lower reserves
immature metabolic pathways
increased nutritional demands
what is gestational correction
adjusts the measurements to account for the number of weeks a baby was born early
how do calculate gestational age for a preterm baby
corrected age = chronological age - weeks of prematurity
where weeks of prematurity = 40-gestational age at birth
which gestation do you correct gestational age
<37 weeks
how long to do you continue to correct gestational age
1 year for 32-36/40wk
2 years for <32/40wk
causes of infections in premature babies
septicaemia meningitis resp infections diarrhoea neonatal tetanus line infections
how can neonatal sepsis be classified
early onset - bacteria acquired before/during delivery
late onset - after delivery
organisms causing neonatal sepsis
GBS
Gram negatives: klebsiella, E coli, pseudomonas, salmonella
Gram positives: coag - Staph (especially with lines/plastic), staph A, strep pneumoniae, strep pyogenes
Incubators Increase Infection, true or false
true!
respiratory complications of prematurity
resp distress syndrome
apnoea of prematurity
bronchopulmonary dysplasia
what is resp distress syndrome/hyalline membrane disease
alveoli are immature and dont produce surfactant, this and structural immaturity resulting in alveolar damage, exudate, inflammation and resulting in fibrosis
clinical features of RDS
tachypnoea grunting intercostal recession nasal flaring cyanosis worsens over min-hours