JPWO2020079617A5 - - Google Patents

Claims (24)

1. A patient interface for delivering a flow of air at a continuous positive pressure relative to ambient air pressure in a sealed manner to an inlet to a patient's respiratory tract including at least the patient's nostril inlet, said patient interface comprising: maintained a therapeutic pressure in the range of about 4 cm H ₂ O to about 30 cm H ₂ O higher than the ambient air pressure in use throughout the patient's respiratory cycle to improve sleep-disordered breathing during sleep. , wherein the patient interface is:
A plenum chamber at least partially defining a cavity pressurizable to a therapeutic pressure of at least 6 cm _H2O above ambient air pressure, said plenum chamber receiving airflow at therapeutic pressure for patient breathing. a plenum chamber including a plenum chamber inlet port sized and configured to
A seal-forming structure having a fabric membrane constructed and arranged to form a pressure-assisted seal against an area of the patient's face surrounding the entrance to the patient's airway below the nose bridge area of the patient's face, the seal-forming structure comprising: the fabric membrane has holes formed therein such that airflow at the therapeutic pressure is delivered to at least the entrance to the patient's nostrils, and the seal-forming structure, in use, is airtight to the patient's breathing; a seal-forming structure constructed and arranged to maintain the therapeutic pressure within the cavity throughout the cycle;
The seal-forming structure includes a flexible silicone support structure for holding a woven membrane in a predetermined curved shape, the woven membrane having a predetermined curved shape with an outer surface having a positive left-right curvature. a mid nasal tip region having a shape, wherein the fabric membrane includes a mid subnasal point region having a predetermined curved shape in which the outer surface has a positive curvature in the left-right direction ;
the plenum chamber comprises silicone, the support structure is integrally formed with the plenum chamber to be a one-piece construction;
In use , the fabric membrane is configured to be pressed against the patient's face such that the patient's nose is not received in the cavity;
The woven membrane is attached to the support structure along the perimeter of the woven membrane, thereby extending radially inwardly beyond the support structure. The plenum chamber and the support structure comprise silicone and are a one-piece structure having a first lateral support having a first thickness and a second thickness having a second thickness less than the first thickness. forming a centrally located nasal base section ;
The nose base section is configured to bend or form a pivot point when the fabric membrane engages the patient's face, thereby allowing left lateral sides and right lateral sides of the support structure to flex. 2. The patient interface of claim 1, wherein the deforms inwardly to cradle the patient's nose. A patient interface according to any one of claims 1-2, wherein the support structure comprises an underlying cushion. A patient interface according to any preceding clause, wherein the support structure comprises foam. A patient interface according to any preceding claim, wherein the support structure comprises silicone and the fabric membrane is molded to the inner edge of the support structure. A patient interface according to any preceding claim, wherein the fabric membrane has a dome shape at the corner regions of the fabric membrane. A patient interface according to any one of the preceding claims, wherein the fabric membrane has a saddle-like shape at a lower central region of the fabric membrane configured to seal under the patient's nose in use. . A patient interface according to any one of the preceding claims, wherein the textile membrane comprises a membrane layer added to the textile material to render the textile material substantially air impermeable. A patient interface according to any preceding clause, wherein the fabric membrane has a thickness in the range of 0.3 mm to 0.5 mm. 10. A patient interface according to claim 8 or 9, wherein the membrane layer thickness of the woven membrane is in the range of 0.05 mm to 0.1 mm. A patient interface according to any one of claims 8-10, wherein the woven material is weft knit. A patient interface according to any one of claims 8-11, wherein the fabric material has a weight in the range of 105 gsm to 120 gsm. A patient interface according to any one of claims 8 to 12, wherein the fabric material has a mechanical gauge in the range of 44GG to 60GG. A patient interface according to any one of claims 8 to 13, wherein the woven material has a melange aesthetic. A patient interface according to any one of claims 8-14, wherein the woven material has a solid color aesthetic. A patient interface according to any one of claims 8-15, wherein the membrane layer comprises silicone. A patient interface according to any one of clauses 8-16, wherein the woven material comprises nylon, spandex, or polyester. 18. A patient interface according to any preceding clause, wherein, in use, treatment pressure within the cavity causes the fabric membrane to be directed toward the patient's face. 19. The patient of any one of claims 1-18, wherein at least one hole in the fabric membrane comprises two holes and a bridge site is positioned between the two holes in the fabric membrane. interface. A positioning and stabilizing structure for providing force to hold the seal-forming structure in a therapeutically effective position on a patient's head, the positioning and stabilizing structure comprising a tie, the tie comprising: 2. further comprising a positioning and stabilizing structure constructed and arranged to rest, in use, at least in part, on a region of the patient's head above the superior fundus point of the patient's head. 20. A patient interface according to any one of clauses -19. A venting structure that permits a continuous flow of gas exhaled by a patient from within the cavity to the surroundings, said venting structure being sized and shaped to maintain a therapeutic pressure within the cavity in use. A patient interface according to any one of claims 1-20, further comprising a venting structure. A patient interface according to any preceding clause, wherein the plenum chamber and seal-forming structure form an oronasal cushion assembly. A patient interface according to any preceding clause, wherein the plenum chamber and seal-forming structure form a nasal cushion. A treatment system for use in treating sleep disordered breathing, comprising:
a patient interface according to any one of claims 1-23;
A therapeutic system comprising: a respiratory pressure therapy (RPT) device for delivering breathable gas at positive pressure; and an air delivery tube for passing breathable gas from said RPT device to said patient interface.