Auto-feedback valve for a sleep apnea device

US11090458B2 · kind B2 · utility

Assignee

• FRESCA MEDICAL, INC. · US

Inventors

• Andrew H. Cragg · Edina, US
• John Logan · Plymouth, US
• Haim Nissimov · Calabasas, US
• Richard C. Ewers · Fullerton, US
• Mark A. Adler · Poway, US
• Eugene Chen · Carlsbad, US
• John Edwin Trusheim · Chaska, US
• John Nolting · Poway, US
• Stephen Anderson · Denver, US
• Kevin Chen · Rancho Palos Verdes, US

Key dates

• Filing date: Mar 14, 2019
• Grant date: Aug 17, 2021
• Expiry date: Feb 20, 2040

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49412
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The system includes an air flow generator configured to deliver an air flow at a positive therapeutic pressure during the treatment, and an expiratory valve with an open pressure connected to the air flow generator. The open pressure is dependent on the therapeutic pressure from the air flow generator. The expiratory valve further exerts a back pressure upon each exhalation from the patient sufficient to create a pneumatic splint in the patient's respiratory tract. The exhalation from the patient has a first half followed by a second half, and the back pressure is varied such that during the start of the first half, the back pressure is between 0 and 50% of a peak back pressure, and increases to a peak back pressure in the second half.