The moment they look for a vein, they're going to insert a needle. This could induce a short pinching or stinging sensation. The blood is drawn into a tube attached to the end of the needle. In some instances, more than one tube could be demanded. Aspartate transferase (AST) is http://puurpositief.nl/24-uurszorg-thuis-dag-en-nachtzorg-bij-u-thuis/