In anatomical sources, the aorta is usually divided into sections. One way of classifying a part of the aorta is by anatomical compartment, where the thoracic aorta (or thoracic portion of the aorta) runs from the heart to the diaphragm. The aorta then continues downward as the abdominal aorta (or abdominal portion of the aorta) diaphragm to the aortic bifurcation.
You can perform an allergy skin test on infants as young as six months, but they're not considered totally reliable in kids younger than two years old. Before going ahead with any type of skin test, a doctor usually takes a few factors into account.
Why It's Done. This test is performed to check for allergies to specific allergens. Doctors may order it when a child has symptoms of an allergy (include hives, itchy eyes or nose, sneezing, nasal congestion, throat tightness, or trouble breathing). Symptoms may be seasonal (as with allergies due to pollen or molds) or year-round (as with pet dander) and can range from mild to severe.