US Patent 7640932 Nasal cannula for acquiring breathing information

A method of monitoring breathing of a patient with a nasal cannula. The method comprising the steps of forming the nasal cannula with at least one nare, and at least one nare having a primary inlet/outlet opening formed in a remote end thereof. Coupling the nasal cannula to a detection device for monitoring breathing characteristics of the patient while the patient is sleeping. Detecting breathing characteristics of the patient, while the patient is sleeping, via at least the primary inlet/outlet opening of the nare and sending the detected breathing characteristics of the patient to detection device for evaluation.