PATIENT INTERFACE DEVICES

摘要

A patient interface device uses a pressure flap which extends inwardly from an outer edge of a mask of the device. The pressure flap is for contacting the skin of the patient to provide a seal or partial seal between the mask volume and the ambient surroundings. The pressure flap comprises a cavity area which is exposed to a reduced pressure compared to the mask volume. This assists in keeping the pressure flap pressed against the patient's skin, and thereby maintain a large contact area. This in turn gives a reduction in local high pressure areas.

主权项

1. A cushion for a patient interface device that includes a mask and a mask volume defined by the mask, the cushion comprising:
a pressure flap extending inwardly from an outer edge of the mask, wherein the pressure flap comprises a cavity area adapted to be disposed adjacent a skin of a patient and between the mask volume, wherein the cavity area is exposed to a reduced pressure compared to the mask volume during use.