Why It Is Done. A phenylketonuria (PKU) screening test is done to see whether a newborn baby has the enzyme needed to use phenylalanine in his or her body. If this test shows that your baby has a phenylalanine problem, the doctor will do further testing to check whether your baby has PKU.he blood sample for PKU is usually taken from your baby's heel (called a heel stick). The test is done in the first few days after birth, as early as 24 hours after birth.
Add image to my collection. Technology to inject drugs into the body is a recent development. Hypodermic syringes (hypodermic means âbeneath the skinâ) consist of a hollow needle attached to a syringe. They pierce the skin and inject substances into the bloodstream. They are also used to extract liquid such as blood from the body.
The plastic sleeve of the IV catheter was advanced over the catheter needle into the vein. The pressure band was then released. A blood collection bag was connected to the hypodermic needle and the hypodermic needle was carefully taped to the skin to prevent it from becoming dislodged. The corpsman had several types of catheter needles to select from but used the simplest one in this case.