A nasal cannula arrangement for use as part of systems for delivery respiratory gases to a patient is disclosed. The nasal cannula arrangement includes a manifold part adapted to receive gases from a delivery conduit. The manifold includes one but preferably a pair of prongs extending upward and curving towards the rear of the manifold. The prongs are inserted into the nostrils of the patient and deliver gases to a patient. The prongs have a cut out on the rear side of the prongs. The cut out forms a gases outlet in the prongs and are shaped such that the area of the cut out area is greater than the cross sectional area of the prongs at the entry point to the prongs.

A patient interface mask for use with a breathing assistance apparatus includes a seal that, in use, circumscribes a nose, mouth, or nose and mouth of a patient and defines an interior space of the mask. The mask includes an inlet into the interior space and an outlet from the interior space. A sensor is positioned outside of the interior space and in the path of exit gases exiting the interior space through the outlet. The sensor detects a parameter of the exit gases, such as temperature, humidity or both.

A method for reducing or preventing mesothelial cell damage by mixing a carrier gas and between 1 volume percent and 29 volume percent of nitrous oxide gas (N.sub.2O) to form a medicament and applying the medicament during surgery. The method can be used for prevention of adhesion formation, pain reduction, reducing or preventing acute inflammation, reducing or preventing CO.sub.2 resorbtion or reducing tumor cell implantation upon surgery.

Provided is an endotracheal tube, which comprises a baffle, an endotracheal tube body and a pharyngeal suction catheter and is integrally formed. The pharyngeal suction catheter is fixedly connected with an outer wall of the endotracheal tube body. One end of the pharyngeal suction catheter is bent to form a front bent portion, a port of the front bent portion is closed and a side wall of the front bent portion is provided with two suction ports. In the case of oral endotracheal intubation, the pharyngeal suction catheter is introduced to the bottom of the pharynx as the endotracheal tube body is inserted into the weasand, and the pharyngeal suction catheter can stay there for a long period of time, enabling high efficiency of removal of pharyngeal secretions, the reduction of discomfort and adsorption injury of the patient, and the reduction of nursing workload.

Condensation or rain-out is a problem in breathing circuits and especially neonatal breathing circuits. The subject patent provides an improved breathing tube component for managing rain-out particularly in neonatal applications. In particular the breathing tube has a smooth inner bore, and an outer insulating layer containing stagnant gas and a heater wire.

Systems and methods for classifying breathing disorders of subjects are based on the respiratory response to a change in a pressure level of a pressurized flow of breathable gas. The change presents a breathing challenge to a subject. The challenge may be limited to the inspiratory breathing phase. The inspiratory pressure level may be lower than the expiratory pressure level during challenges.

A breathing assistance apparatus adapted to deliver humidified gases at a desired level of humidity to a patient including a humidifier and a heated conduit is disclosed. The humidifier includes a controller which determines the flow rate of the gases and then determines the required power input to the humidifier to deliver the gases to the patient at the required patient humidity. This means the need for external sensors is dispensed with and thus the apparatus is simple and less bulky.

This invention relates to connectors to be provided into fluid communication or engagement either directly with, or via a component to be associated with, a terminal end of a breathing conduit. In at least one embodiment, the connector comprises a body having a first end and a second end, and an internal lumen for the passage of gas between the ends. The first end engageable with a terminal end of a conduit or a component to be associated therewith. The second end engageable with another connector. An internal surface of the body at the second end comprises internal connection features for connection with another connector to be received internally therein. An external surface of the body comprises one or more external alignment feature(s) for aligning the connector or another connection into an aligned orientation for connection therebetween.

A method and system for monitoring respiratory waveforms. The method includes acquiring a data set representative of a waveform, comparing one or more segments of the data set with stored abnormal shapes and/or values, determining, using the processing circuitry and based on the comparison, a match level, identifying an abnormality associated with an abnormal shape and/or a value in response to determining that the match level between the data set and the abnormal shape and/or the value is above greater or below a predetermined threshold, and outputting a notification indicating the abnormality to an external device.

A PAP system for delivering breathable gas to a patient includes a flow generator to generate a supply of breathable gas to be delivered to the patient; a humidifier including a heating plate to vaporize water and deliver water vapor to humidify the supply of breathable gas; a heated tube configured to heat and deliver the humidified supply of breathable gas to the patient; a power supply configured to supply power to the heating plate and the heated tube; and a controller configured to control the power supply to prevent overheating of the heating plate and the heated tube.