A pressure regulating device for use with a breathing assistance and/or resuscitation apparatus, which conveys gases along a gases pathway to a patient, includes a mounting for connecting the pressure regulating device to a first outlet in fluid communication with the gases pathway. The mounting holds a valve member that selectively blocks, at least in part, the first outlet. A control member can be manipulated to adjust a property of the valve member. The valve member at least partially blocks the first outlet when the pressure of gases in the pathway is below a selected level, and allows at least a portion of the gases to flow out of the first outlet when the pressure of said gases is above the selected level. The property includes a selected level of pressure whereby manipulation of the control member adjusts the level of pressure between a maximum level and a minimum level.

A compact, on-airway, respiratory gas analyzer for performing pulmonary function tests incorporates an IR spectroscopy light guide having a curved, rather than linear, sample chamber that lies transverse to a direction of respiratory gas flow. Cooperating with the sample chamber is an impact plate that functions to steer respiratory and test gases impinging on the impact plate into the curved sample chamber. A source of IR energy is at one end of the sample chamber and an electro-optical sensor responsive to IR energy is disposed at an opposite end of the chamber. The respiratory gas analyzer also includes gas flow paths and valving for carrying out lung capacity and lung diffusion tests.

A breathing assistance device includes a gas regulating valve (1300). The gas regulating valve is operated by a linear actuator (1330). The linear actuator may include a movable member that moves an obstruction member between an open position and a closed position. The linear actuator is isolated from a gas flow path through the valve.

An exhalation assembly that controls the pressure of exhaled gas in a ventilation system is described. The exhalation assembly includes a filter body and a condensate trap. Additionally, a filter/trap module that includes a filter body and a condensate trap is also described.

A compact, on-airway, respiratory gas analyzer for performing pulmonary function tests incorporates an IR spectroscopy light guide having a curved, rather than linear, sample chamber that lies transverse to a direction of respiratory gas flow. Cooperating with the sample chamber is an impact plate that functions to steer respiratory and test gases impinging on the impact plate into the curved sample chamber. A source of IR energy is at one end of the sample chamber and an electro-optical sensor responsive to IR energy is disposed at an opposite end of the chamber. The respiratory gas analyzer also includes gas flow paths and valving for carrying out lung capacity and lung diffusion tests.

The invention relates to a gas regulating valve (1) for a respiratory system comprising:a main path between an inlet (2) and an outlet (3), andan evacuation path between the outlet (3) and an evacuation orifice (4), characterised in that:the main path is provided with at least a non-return valve for preventing gas to circulate from the outlet (3) to the inlet (2), andthe evacuation path is provided with an obstructing membrane (10) arranged and designed for being deformed by gas from the inlet (2) to partially or fully obstruct the evacuation path. The invention also relates to a mask integrating such gas regulating valve, and to a respiratory system also comprising such gas regulating valve.

A tracheostomy guard (10, 30, 40, 50) for a patient interface is provided. The tracheostomy guard (10, 30, 40, 50) comprises a first portion (11) arranged to connect to a patient interface, in use, a second portion (12) attached to the first portion and configured to be in fluid communication with the patient interface and/or the first portion (11), in use. The second portion (12) comprising at least one first member (121) and/or second member (122) forming at least one aperture in fluid communication with the ambient environment, wherein the aperture (13) has a size that is variable in response to a force applied to at least part of the second portion, in use. An assembly (100) comprising the tracheostomy guard, a valve unit, a valve component, and a kit of parts, are also provided.

The present invention relates to an expiratory valve (10) of a ventilation device (100), comprising a valve body (12) having a fluid inlet (14) and a fluid outlet (16) for breathing air of a patient formed therein, said valve body (12) comprising a support (42) having a top side (46) on which a valve membrane (20) can be placed with an abutment area formed at the outer edge thereof, with the top side (46) of the support (42) having an uneven design.

The present invention relates to an expiratory valve (10) of a ventilation device (100), comprising a valve body (12) having a fluid inlet (14) and a fluid outlet (16) for breathing air of a patient formed therein, said valve body (12) defining a fluid flow path between fluid inlet (14) and fluid outlet (16), with the cross-sectional area of said fluid flow path expanding in the direction towards the fluid outlet (16).

The present invention relates to an expiratory valve (10) of a ventilation device (100), comprising a valve body (12) having a fluid inlet (14) and a fluid outlet (16) for breathing air of a patient formed therein, said valve body (12) having at least one reinforcing rib (36, 38) formed around the fluid inlet (14).