PDA

Question 1

Explain what a PDA is

Answer 1

Persistent ductus arteriosus which connects the pulmonary artery to the descending aorta

Higher pressure in the orta, so oxygenated blood takes two turns round to the lungs

Question 2

Mumur for PDA

Answer 2

Continous mumur below the left clavicle

• Mumur continues through to diastole because the pulmonary artery pressure is lower than aorta through out the whole of the cardiac cycle

Question 3

Pulse in PDA?

Answer 3

1. Collapsing / Bounding pulse and wide pulse pressure

Question 4

Mx of PDA

Answer 4

1. Closure via surgical ligation/coil closure

- closure is recommended to abolish lifetime risk of bacterial endocardiitis and pulmonary vascular disease

Question 5

Signs in a child with PDA

Answer 5

1. Tachypnoae
2. Poor feeding and poor weight gain
3. Reccurent LRTI
4. Crackles on auscultation but normal O2 sats

Question 6

What do Ix in PDA show?

Answer 6

5. Chest X ray - Plethoric lung fields

6. Echo - duct seen