| abstract |
A patient interface is disclosed that includes a chassis portion having a pair of laterally projecting connecting portions configured to connect to a gas delivery tube, a seal-forming structure, and a vent. The seal-forming structure may include a central portion and a pair of lateral rear regions, the central portion being configured to seal against the underside perimeter of the patient's nose in use. Each lateral rear region may include a decoupling portion configured to at least partially decouple the central portion from a corresponding one of the laterally protruding connecting portions. The seal-forming structure may include a rigidizing portion, a central front portion with an upper portion that is stiffer than a lower portion, an intermediate front portion with an upper portion that is stiffer than a lower portion, and/or a front portion that is harder than the rear Part of the harder upper lip part. The chassis portion may be formed of a flexible material and may include an upper chassis reinforcement portion. |