Patent ID: 8550082
Filing Date: 2013-10-08
Classification: A61M,A62B,Y10T

Abstract:
1. A mask cushion system to deliver breathable gas to patients, the system comprising: a set of four full-face cushions, each full-face cushion in the set including a nasal bridge region, cheek regions and a chin region, each of the full-face cushions defining, at least in part, a breathing cavity, the set of full-face cushions including: a first full-face cushion, the first full-face cushion comprising a first membrane including a first nasal bridge region, first cheek regions and a first chin region forming a first sealing structure to contact a nasal bridge region, cheek regions, and a chin region of the patient's face, the first membrane having an inner edge that defines a first aperture to receive the patient's nose and mouth, the first aperture including a lower portion having a first mouth width; a second full-face cushion, the second full-face cushion comprising a second membrane including a second nasal bridge region, second cheek regions and a second chin region forming a second sealing structure to contact a nasal bridge region, cheek regions, and a chin region of the patient's face, the second membrane having an inner edge that defines a second aperture to receive the patient's nose and mouth, the second aperture including a lower portion having a second mouth width; a third full-face cushion, the third full-face cushion comprising a third membrane including a third nasal bridge region, third cheek regions and a third chin region forming a third sealing structure to contact a nasal bridge region, cheek regions, and a chin region of the patient's face, the third membrane having an inner edge that defines a third aperture to receive the patient's nose and mouth, the third aperture including a lower portion having a third mouth width; and a fourth full-face cushion, the fourth full-face cushion comprising a fourth membrane including a fourth nasal bridge region, fourth cheek regions and a fourth chin region forming a fourth sealing structure to contact a nasal bridge region, cheek regions, and a chin region of the patient's face, the fourth membrane having an inner edge that defines a fourth aperture to receive the patient's nose and mouth, the fourth aperture including a lower portion having a fourth mouth width, wherein, in a front view, each of the first, second, third and fourth apertures has a different height, the first mouth width is within 5 mm of the second, third and fourth mouth widths, the second mouth width is within 5 mm of the third and fourth mouth widths, and the third mouth width is within 5 mm of the fourth mouth width, wherein the first full-face cushion is a large size full-face cushion, the second full-face cushion is a medium size full-face cushion, the third full-face cushion is a small size full-face cushion and the fourth full-face cushion is a size that is smaller than the third full-face cushion, wherein the first full-face cushion is the largest full-face cushion in the set and the fourth full-face cushion is the smallest full-face cushion in the set, and the first mouth width is within 5 mm of the fourth mouth width, and wherein the first, second, third and fourth apertures have different mouth width to height ratios.