Pulse oximeters are medical devices that determine the level of oxygen within the blood and are used to determine if the lungs are functioning properly.  Asthmatics are people who have a problem, such as asthma, breathing.  One treatment for asthma, portable nebulizers, are small devices that can help assist in keeping things like bronchitis, pulmonary diseases, and emphysema under control. The device functions by allowing medications to enter the body directly through the lungs which can then enter the body's system swiftly. A nebulizer allows patients with chronic conditions to be less tied down by their affliction and allows for travel and movement.