Patent ID: 11857710
Assignee: SUNMED GROUP HOLDINGS, LLC
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 19:
20. A ventilation mask, comprising:
a mask body defining a patient cavity, the mask body comprising:
a patient opening in fluid communication with the patient cavity; and
at least one vent opening formed through the mask body, the at least one vent opening in fluid communication with the patient cavity, wherein the at least one vent opening is disposed generally opposite to the patient opening;

at least one gas fence disposed adjacent to the at least one vent opening, the at least one gas fence extending axially toward the patient opening; and
a gas manifold coupled to the mask body, the gas manifold and the mask body cooperatively defining a gas channel positioned circumferentially around the at least one vent opening, wherein a first portion of the gas channel is defined by the gas manifold and a second portion of the gas channel is defined by the mask body, the gas manifold comprising a plurality of gas ports positioned opposite the upper lip of a patient when the mask is worn by a patient and in fluid communication with the gas channel, wherein the plurality of gas ports and the at least one gas fence are configured to create a curtain effect gas flow within the patient cavity to form or retain an oxygen curtain within the patient cavity and adjacent to the at least one vent opening.