Layered nasal devices

A layered nasal device adapted to be adhesively secured in communication with a subject's nasal cavity, the device comprising:

• a layered airflow resistor configured to inhibit exhalation more than inhalation, wherein the layered airflow resistor comprises a flap valve adjacent to a flap valve limiter and a leak pathway through the flap valve through which air may pass even when the airflow resistor is closed;
• a layered adhesive holdfast comprising
• a substrate layer, and
• a layer of biocompatible adhesive.

An adhesive nasal device that is adapted to be secured in communication with a subject's nasal cavity, the device comprising:

• an airflow resistor configured to inhibit exhalation more than inhalation
• a leak pathway through the flap valve through which air may pass even when the airflow resistor is closed;
• and
• a flexible adhesive holdfast layer configured to secure the airflow resistor in communication with the subject's nasal cavity, wherein the adhesive holdfast layer extends at least partially around the airflow resistor.

A layered nasal device adapted to be adhesively secured in communication with a subject's nasal cavity, the device comprising:

• a layered airflow resistor configured to inhibit exhalation more than inhalation, wherein the layered airflow resistor comprises a flap valve adjacent to a flap valve limiting layer;
• at least one leak pathway through the device through which air may pass during exhalation;
• and
• an adhesive holdfast layer configured to secure the layered airflow resistor in communication with the subject's nasal cavity.