Fisher & Paykel Healthcare Limited

Joseph Jules Nihotte

Ryan Anthony Graham

Neil Gray Duthie

Grant Leigh Nelson

Carsten Ma On Wong Corazza

James Alexander Gordon

Sascha Kristopher Zoellner

Bhavna Prentice

Brendan O'Neill

Ashani Melisha Perera

Systems and methods for non-invasive ventilation are provided. The systems may include a gas source that provides breathing gases to a patient through one or more of a primary flow path (PFP) and a flushing flow path (FFP). The system may include a control assembly configured to open and restrict gas flow through the PFP. When the PFP is open, a significant portion of the gas flows through the PFP while the remaining gas flows through the FFP. When the PFP is restricted, a significant portion of the gas flows through the FFP. Increased flow through the FFP may have a high velocity (especially relative to the flow through the PFP). Gas delivered through the FFP may be used to flush dead space. One or both flow paths may contribute to inspiratory positive airway pressure (IPAP), expiratory positive airway pressure (EPAP), and/or positive end expiratory pressure (PEEP).

System and method for non-invasive ventilation

A patient interface of a respiratory therapy system is provided, and includes a mask body; a mask seal secured to the mask body and configured to form a seal with the user's face, at least around the user's mouth; the mask body and mask seal being arranged to define an interior breathing chamber of the patient interface; and an inlet to the breathing chamber configured to receive a flow of breathable gases into the breathing chamber. To assist in allowing a user to speak clearly whilst wearing/using the patient interface, a user actuatable speech valve is provided on the patient interface and is operable to selectively occlude and open a speech flow path from the breathing chamber to atmosphere when the user wishes to speak.

Patient interface and a speech valve therefor

A patient interface of a respiratory therapy system is provided, and includes: a. a mask body; b. a mask seal secured to the mask body and configured to form a seal with the user's face, at least around the user's mouth; the mask body and mask seal being arranged to define an interior breathing Chamber of the patient interface; and c. an inlet to the breathing chamber configured to receive a flow of breathable gases into the breathing chamber. To assist in allowing a user to speak clearly whilst wearing/using the patient interface, a user actuatable speech valve is provided on the patient interface and is operable to selectively occlude and open a speech flow path from the breathing chamber to atmosphere when the user wishes to speak.

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Auckland, New Zealand

Joseph Jules Nihotte