A detachable nasal cannula assembly is described that provides oxygen to a patient or delivers carbon dioxide from a patient to a monitor for testing. A nasal and head portion of the cannula assembly is detachable from a main tubing that is connected to an oxygen supply or a carbon dioxide monitor. The...http://www.google.com/patents/US20030111081?utm_source=gb-gplus-sharePatent US20030111081 - Detachable nasal cannula assembly
