patent ductus arteriosus Flashcards
1
Q
when does ductus arteriosus usually close
A
within 2-3wks
2
Q
PDA risk factors
A
prematurity
3
Q
small PDA
A
can be asymptomatic
cause no issues
can close spontaneously
4
Q
pathophysiology
A
L to R shunt - pressure in aorta higher than pulmonary vessels
- pulmonary hypertension
- R heart strain + R ventricular hypertrophy
- L V hypertrophy
5
Q
features
A
SOB difficulty feeding poor weight gain LRTIS murmur
6
Q
murmur
A
continuous crescendo-descrendo machinery murmur
7
Q
diagnosis
A
ECHO
8
Q
Mx
A
monitor using ECHO until 1yr
after age 1 unlikely will close spontaneously so trans-catheter or surgical closure done
closed earlier if symptomatic or evidence heart failure
9
Q
medical Mx
A
indomethacin or ibuprofen
- given to the neonate
- inhibits prostaglandin synthesis
- closes the connection in the majority of case
