neonatology

Question 1

when does the CVS develop ?

Answer 1

begins end of 3rd week
heart starts to beat at start of 4th week
critical period is 20-50 days after fertilisation

Question 2

what is the O2 saturation of the foetal body ?

Answer 2

60-70%

Question 3

what is the function of the ductus arteriosus ?

Answer 3

protects lungs from circulatory overload

allows RV to strengthen

Question 4

what is the function of the ductus venosus ?

Answer 4

vessel connecting the umbilical vein to the IVC

Question 5

what are the normal vital signs of a full term newborn ?

Answer 5

HR 120-160 bpm
RR 30-60 min, periodical breathing
BP 70/44

Question 6

what is physiological jaundice ?

Answer 6

appears after 2-3 days
lasts until 7-10 days
60% of terms, 80% preterms
at high concentrations bilirubin can cause kernicterus (brain change)

Question 7

how do you treat physiological jaundice ?

Answer 7

blue light phototherapy converts bilirubin to water-soluble form

Question 8

what is normal fluid balance for newborns ?

Answer 8

weight loss of up to 10% is normal
fluid shifts intravascularly
normal not to pass urine for first 24 hrs