Final answer:
The correct technique for collecting blood after a heel puncture for neonatal screening is to saturate each circle on the screening card with a drop of blood, avoiding smudging or touching the heel to the card.
Step-by-step explanation:
After performing a heel puncture for neonatal screening, the correct procedure for collecting the blood is to saturate each circle on the screening card. This means you should add enough blood to fill the circle without over-saturating. The blood should be applied to the card by allowing a drop to fall freely onto the center of the circle until it is filled. It is important to avoid smudging or smearing the blood and to ensure each circle is properly filled for accurate results.