Fisher & Paykel Healthcare Limited

Russel William Burgess

Dean Antony Barker

Peter Geoffrey Hawkins

Kevin Peter O'Donnell

Mikael Douglas Stewart

Joel Michael Lawson

Andre Van Schalkwyk

Anton Kim Gulley

Houde Huang

Andrew Paul Maxwell Salmon

Philip John Dickinson

Laith Adeeb Hermez

Christopher Malcolm Crone

Jae Chul Han

Robert Stuart Kirton

Jess Edward Donnelly

Ella Marie Meisel

Rachel Adeline Miller

David Martin Russell

Bryn Alan Edwards

Jae Chui Han

Charles Grady Cantrell

Rhys Matthew James Williams

Kevin Peter O′Donnell

Maurice Wen-Bin Chai

Yi Lin Huang

Cameron Alexander Lawrence

Eamonn Bernard McKnight

Kevin Peter O'donnell

Dean Anthony Barker

A respiratory flow therapy apparatus including a sensor module can measure a flow rate of gases or gases concentration provided to a patient. The sensor module can be located after a blower and/or mixer. The sensor module can include at least an ultrasonic transmitter, a receiver, a temperature sensor, a pressure sensor, a humidity sensor and/or a flow rate sensor. The receivers can be immersed in the gases flow path. The receivers can cancel delays in the transmitters and improve accuracy of measurements of characteristics of the gases flow. The receivers can allow for detection of a fault condition in a blower motor of the apparatus.

Flow path sensing for flow therapy apparatus

The present disclosure provides for a control system for a flow therapy apparatus. The control system can control delivery of a fraction of delivered oxygen (FdO2) to a patient. The control system can maintain the FdO2 at a target level during a therapy session. The control system can automatically control an oxygen inlet valve in order to control the flow of oxygen to the patient.

Methods and systems for controlling oxygen delivery in a flow therapy apparatus

A respiratory assistance apparatus has a gases inlet configured to receive a supply of gases, a blower unit configured to generate a pressurised gases stream from the supply of gases; a humidification unit configured to heat and humidify the pressurised gases stream; and a gases outlet for the heated and humidified gases stream. A flow path for the gases stream extends through the respiratory device from the gases inlet through the blower unit and humidification unit to the gases outlet. A sensor assembly is provided in the flow path before the humidification unit. The sensor assembly has an ultrasound gas composition sensor system for sensing one or more gas concentrations within the gases stream.

Respiratory assistance apparatus

Systems and method for conducting respiratory therapy in a respiratory system can adjust a flow of respiratory gases to a patient based upon a detected patient breath cycle. The respiratory system can include a non-sealed patient interface. The respiratory system can be configured to deliver a high flow therapy. A patient breath cycle may be determined using one or more measured parameters, such as a flow rate, a blower motor speed, and/or a system pressure. A flow source may be adjusted to have a phase matching that of the patient's breath cycle, such that flow in increased in response to the patient inhaling, and decreased in response to the patient exhaling.

A gases flow rate sensing system may be configured to operate in at least two different target temperature modes, based upon a measured temperature of the gases flow. In some embodiments, the gases flow sensing system may have a voltage divider containing a thermistor. The gases flow rate may be determined based upon a voltage output indicating an amount of power needed to maintain the thermistor at a target temperature as specified by the target temperature mode, and a measured temperature of the gases flow.

Thermistor flow sensor having multiple temperature points

The present disclosure provides for a flow therapy apparatus that can implement one or more closed loop control systems to control the flow of gases of a flow therapy apparatus. The flow therapy apparatus can monitor blood oxygen saturation (SpO2) of a patient and control the fraction of oxygen delivered to the patient (FdO2). The flow therapy apparatus can automatically adjust the FdO2 in order to achieve a targeted SpO2 value for the patient.

Closed loop oxygen control

A respiratory flow therapy apparatus including a sensing chamber which measures a flow of gases provided to a patient. The sensing chamber can be located after a blower and/or mixer. The sensing chamber can include an ultrasonic transducer, a temperature sensor, a heated temperature sensing element, and/or a gas concentration sensor. A flow path of gases used in conjunction with the sensor system prevents unwanted vorticity in the flow of gases that can create anomalies in measuring flow.

A respiratory therapy system can have a flow generator adapted to provide gases to a patient. A gas passageway can be located in-line with the flow generator. The gas passageway can have a first portion adapted to receive a first gas and a second portion adapted to receive a second gas. The gas passageway can have a static mixer downstream of the first and second portions.

Fluid mixing structure

A respiratory assistance apparatus () is provided, adapted to deliver gases to a user or patient (). The apparatus () comprises a housing () provided with a chamber () and a heater (), the chamber () comprising at least one gas port () connected to, or arranged to be connected to, at least one intermediate passageway (). The apparatus () is operative according to a disinfection mode of predetermined profile in which the heater () heats liquid in the chamber () to produce vapour at or above a target dewpoint temperature and/or humidity level. The apparatus () is arranged such that the vapour is delivered to the intermediate passageway () to disinfect the intermediate passageway () with moist heat throughout a predetermined duration of the disinfection mode. Associated attachments and methods are also provided.

An apparatus for delivering a flow of gas, has a housing' with a recess, and an outlet port&#x2032; for a flow of gas. The recess is defined by at least one wallthat is substantially continuous, gas impermeable, and unbroken, other than a gasflow passage from the recess to the outlet port of the housing.

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Auckland, New Zealand

Russel William Burgess