Abstract: Determining nasal resistance. At least some of the illustrative embodiments are methods including: applying negative pressure to a patient's mouth and thereby creating airflow that flows in a first nare and out the patient's mouth; measuring at least one property of the airflow during the causing; and determining an indicia of nasal resistance of the patient, the determining based on the at least one property.
Abstract: Determining the nasal resistance. At least some of the illustrative embodiments are methods including: forcing airflow into a first nare of a patient; measuring at least one property of the airflow during the forcing; and determining an indicia of nasal resistance of the patient, the determining based on the at least one property.