The airflow perturbation device (APD) is a medical instrument developed for noninvasive measurement of respiratory resistance. This device can be very useful for measurements on small children, unconscious or uncooperative patients, and animals. The APD offers a number of potential advantages for the frequent checks ups on lung function in patients with pulmonary disease. It requires no cumbersome equipment or complicated maneuvers like panting or forced expiration like FEV1 or PEF. Thus APD measurement would be ideal to use as an out of hospital assessment of lung function. NCC-PDI has provided assistance in developing a commercialization strategy and plan.