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.
Skin testing has historically been the preferred method owing to higher sensitivity. 6 However, the Joint Task Force on Practice Parameters, composed of the 3 national allergy and immunology societies, considers both skin testing and in vitro IgE tests to have sufficient sensitivity to help rule out IgE-mediated food allergies. 7 Moreover, there are certain circumstances in which an in vitro test should be used instead of a skin test 6: