Choking first aid. Artwork showing how to carry out first aid on a baby that is choking. This method should be used if blows to the back have failed to dislodge the object. The baby is placed on its back and two finger are placed in the middle of the chest just below the nipples. The fingers should then be thrust inwards and upwards (towards the baby's head) to force air out of the lungs and dislodge the blockage.