Fisher & Paykel Healthcare Limited

Oosthuysen, Helgard

Anthony James Newland

Andre Van Schalkwyk

Po-Yen Liu

Daniel John Smith

Timothy James Beresford Sharp

Ivan Chih-Fan Teng

Stefan Leo Van Workum

Dexter Chi Lun Cheung

Michael John Andresen

Matthew Jon Payton

Elmo Benson Stoks

David Robert Kemps

David John Sims

Peter Kenneth Graham

Malcolm David Smith

Peter Alan Seekup

Paul James Tonkin

Kiel Anthony McCool

Michael Robert Barraclough

Jonathan Mark Church

Kieran Michael Orchard

Jess Edward Donnelly

Ping Si

Ian Lee Wai Kwan

Helgard Oosthuysen

Matthew Robert Wilson

Callum McDonald Ross

Sinaa Alnashi

Wenjie Robin Liang

Oliver Samuel Steiner

Rachael Glaves

Philip James Edgeworth

Winnie Yong Jiang-Foo

Yayi Lin

Hamish Adrian Osborne

Laith Adeeb Hermez

Stephen David Evans

Graeme Woolmore

Craig Robert Jeffrey

Kiel Anthony Mccool

Callum Mcdonald Ross

A humidification arrangement can be configured to have multiple compartments with each compartment having at least one moisture source and at least one heater. The compartments can be thermally isolated and can be controlled such that the moisture output of both the first and second compartments is set to a function of the same set of input signals.

Gas humidification arrangement

The present disclosure provides for an improved method of determining a water out condition in a humidified gases supply apparatus. The method includes a two-step process including a primary determination of a water out condition and a secondary determination of a water out condition. This primary determination is made during observation of the normal operation of the apparatus. During the secondary determination the method takes temporary control over the humidifying part of the apparatus. The secondary determination confirms or contradicts the primary determination.

Water out alarm determination

Some embodiments provide for an inspiratory limb for a breathing circuit that includes a first segment that comprises a first heater wire circuit and a second segment that comprises a second heater wire circuit. The inspiratory limb can include an intermediate connector that includes a connection circuit that electrically couples the first heater wire circuit to the second heater wire circuit. The inspiratory limb can be configured to operate in two modes wherein, in a first mode, electrical power passes through the first electrical connection to provide power to the first heater wire circuit without providing power to the second heater wire circuit, and in a second mode, electrical power pass through the first electrical connection to provide power to both the first heater wire circuit and the second heater wire circuit.

Zone heating for respiratory circuits

This invention relates to a humidifier for a respiratory assistance device, a respiratory assistance device comprising a humidifier and related methods and apparatus. The invention particularly provides arrangements for generating vapour by impinging light on metallic and/or carbon based material, particularly in the form of nanoparticles.

Humidifier for a respiratory assistance device, a respiratory assistance device and related methods and apparatus

In some embodiments, a humidification system includes a heater base having a heater plate, a humidification chamber, and circuit. The circuit can include various conduits, including an inspiratory conduit, expiratory conduit, Y-piece, patient conduit, and/or dry conduit. In use, the chamber contains a quantity of liquid. The heater base heats the heater plate, which in turn heats the liquid to a temperature that causes at least some of the liquid to become vapor, thereby humidifying the gases within the chamber. The gas is delivered to the patient via the inspiratory conduit. Various features can help control the system and ensure the patient receives gases having the desired conditions. These features can be used individually or in various combinations and subcombinations both in existing humidification systems and improved systems for respiratory humidification, laparoscopy, and other purposes.

Humidification system

A gases humidification system includes a measuring chamber and a mixing chamber. The mixing chamber has one or more mixing elements that improve a mixing of gases before reaching the measuring chamber. Ultrasonic sensing is used to measure gases properties or characteristics within the measuring chamber. A baffle or a vane may be used to control and direct the gases flow through the mixing chamber as the gases flow moves into the measuring chamber.

Gases mixing and measuring for a medical device

A respiratory assistance system including a humidification apparatus used for delivery of heated and humidified gases to a patient includes a humidification chamber with an associated heater and sensor, an inspiratory conduit with an associated heater and sensor, and an unheated patient interface, such as a face mask. A controller of the humidification apparatus is configured to determine a gas source and change the set point accordingly to maintain patient comfort regardless of the humidity level of the gas source.

Humidification of respiratory gases

A system for humidifying respiratory gases has a humidification apparatus, a humidification chamber, a heating apparatus and a sensor. The sensor is configured to determine a characteristic of the gases flow and communicate this to a controller which controls the power supplied to the heating apparatus with respect to information regarding the characteristic of the gases flow. A structure partially encloses the humidification chamber and allows energy loss through a wall of the humidification chamber. The humidification chamber may have features to promote heat loss through the wall of the chamber.

A humidification apparatus for a respiratory assistance device is provided wherein the humidification apparatus is configured such that, in use, light impinges on a humidification material to generate localised heating of liquid molecules around the humidification material to generate vapour. A respiratory assistance device comprising a humidifier and related methods and apparatus are also provided. Arrangements are provided for generating vapour by impinging light on a humidification material, wherein, in some embodiments, the humidification material comprises a metallic and/or carbon based material, particularly in the form of nanoparticles.

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Auckland, New Zealand

Anthony James Newland