Tests to measure the amount of carbon dioxide and oxygen in the blood.Allergy testsWhat are asthma triggers?According to the CDC, the American Academy of Allergy, Asthma, and Immunology, and other organizations, triggers for asthma include the following:AllergensRespiratory infections PollenMoldAnimal protein (dander, urine, oil from skin)House dust or dust mitesCockroach droppingsCertain foodsInf