Self-sealing mask for delivering intermittent positive pressure ventilation
First Claim
1. A respirator mask assembly for delivery of intermittent positive pressure ventilation, comprisingA. a selectively sealable facial unit defining an interior region for communicating with the airway of a patient;
- B. a support structure;
C. sealing means for intermittently sealing said facial unit to a patient'"'"'s face, said sealing means including a hollow piston having a first end and a second end,said first end being secured to said facial unit andsaid second end being secured to said support structure,wherein the interior region of said piston is in communication with said interior region of said facial unit, and said first end is displaceable with respect to said support structure in response to pressure variation in the interior of said piston;
D. securing means affixed to said support structure for securing said mask assembly to the head of a patient; and
E. means for introducing a breathable gas from a source other than said patient to said interior region of said facial unit.
1 Assignment
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Accused Products
Abstract
A respirator mask assembly for use with intermittent positive pressure breathing treatments facilitates the formation and automatic intermittent adjustment of the seal between a patient'"'"'s face and a facial unit of the respirator mask. The respirator mask assembly comprises a facial unit, an expandable piston adjacent the facial unit and a rigid support structure attached to one end of the piston, and an attachment mechanism for securing the mask assembly to a patient. During the inspiration portion of the ventilation cycle a positive pressure is developed within the mask assembly, causing the piston to expand. Because, the attachment mechanism and the support cooperate to resist significant expansion of the piston, a force is generated which presses the facial unit against the patient'"'"'s face and maintains an air tight seal. When pressure within the masks unit decreases, the contact force on the facial unit is likewise decreased and the seal is eliminated.
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Citations
18 Claims
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1. A respirator mask assembly for delivery of intermittent positive pressure ventilation, comprising
A. a selectively sealable facial unit defining an interior region for communicating with the airway of a patient; -
B. a support structure; C. sealing means for intermittently sealing said facial unit to a patient'"'"'s face, said sealing means including a hollow piston having a first end and a second end, said first end being secured to said facial unit and said second end being secured to said support structure, wherein the interior region of said piston is in communication with said interior region of said facial unit, and said first end is displaceable with respect to said support structure in response to pressure variation in the interior of said piston; D. securing means affixed to said support structure for securing said mask assembly to the head of a patient; and E. means for introducing a breathable gas from a source other than said patient to said interior region of said facial unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A respirator mask, comprising
a selectively sealable facial unit able to introduce a breathable gas to a patient'"'"'s airway; -
a sealing means for intermittently forming a seal between said facial unit and the patient'"'"'s face, said sealing means including an expandable piston and a rigid support structure, said piston being secured at one end to said facial unit and at the other end to said support structure; strap means extending from said support structure for securing the respirator mask to a patient'"'"'s head; and means for introducing a breathable gas from a source other than the patient to the facial unit.
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Specification