Interface comprising a rolling nasal bridge portion

摘要

An interface for positive pressure therapy includes a mask assembly 102, a headgear assembly and a connection port assembly. The mask assembly has a seal member with an upper portion 154 movably connected to an integrated lower portion 156, wherein the upper portion rolls during hinging movement of the upper portion relative to the lower portion. The upper portion may be reinforced by a band 174 forming an arch. A ratchet may be provided to lock the mask in a preferred position and the extent of rotation may be indicated by a colour gradient or numerical scale. The headgear assembly allows connection to the mask assembly in a direction substantially normal to a direction of strap tension. The connection port assembly includes a swivel elbow with a valve member that controls flow through a port that opens toward the user.