A system, method and software product for detecting and controlling respiratory status of a patient based on estimated respiratory status that includes ventilating a patient using a first electrode, configured to be coupled to a chest of the patient at a first position, and to produce a first electrocardiogram (ECG) signal; a second electrode, configured to be coupled to the chest at a second position different from the first position, and to produce a second ECG signal; and a processor, which is configured to: (i) produce a first filtered signal by applying a first filter to the first ECG signal, and a second filtered signal by applying a second filter to the second ECG signal, (ii) estimate, by comparing between the first and second filtered signals, an electrical impedance between the first and second electrodes, which is indicative of a respiratory status of the patient, and (iii) control the ventilation system to apply a ventilation scheme responsively to the estimated electrical impedance.

A respiratory therapy system for providing continuous positive air pressure (CPAP) to a patient may include a flow generator for generating a supply of breathable gas, a sensor to measure a physical quantity while the breathable gas is supplied, and a computing device. The computing device may be configured to: receive sensor data that is based on measured physical property of the supply of breathable gas; control the flow generator to adjust a property of the supply of breathable gas; display a question and a plurality of selectable responses; receive a first input selecting one of the selectable responses; and display a coaching response corresponding to the selected response.

A pathogen detection system includes a pathogen sensing adaptor that detect pathogens present in the breathing circuit associated with a ventilated patient. A pathogen sensing adaptor may include a conduit, removable cartridges with testing strips, an optical sensor, and communication circuitry. Upon detecting a colorimetric change on the testing strip, the optical sensor generates a signal indicative of the presence and/or level of pathogens.

The disclosure relates to medical tubes and methods of manufacturing medical tubes. The tube may be a composite structure made of two or more distinct components that are spirally wound to form an elongate tube. For example, one of the components may be a spirally wound elongate hollow body, and the other component may be an elongate structural component also spirally wound between turns of the spirally wound hollow body The tube need not be made from distinct components, however. For instance, an elongate hollow body formed (e.g., extruded) from a single material may be spirally wound to form an elongate tube. The elongate hollow body itself may in transverse cross-section have a thin wall portion and a relatively thicker or more rigid reinforcement portion. The tubes can be incorporated into a variety of medical circuits or may be employed for other medical uses.

Apparatus and methods provide control for generation of a flow of air to a patient's airways for different respiratory therapies. The pressure and a flow rate may be simultaneously controlled so as to provide a pressure therapy and a flow therapy. The system may include one or more flow generators, in which the control of the pressure and flow rate may include altering the output of one or more of the flow generators and/or an optional adjustable vent. The pressure and flow rate may each be held at a constant. One or both of the pressure and flow rate may also vary in accordance with a desired therapy. The air may be provided via a patient interface that includes a vent to atmosphere, which may be the adjustable vent. The vent may be actuated by a controller to implement the simultaneous control of pressure and flow rate of the air.

Breathing tube assemblies for use with a respiratory therapy device, such as a continuous positive airway pressure (CPAP) device, includes an elbow that permits adjustment of a position of the breathing tube assembly relative to the respiratory therapy device. In some arrangements, the breathing tube assembly includes a breathing tube and a swivel elbow. The breathing tube is rotationally fixed relative to the respiratory therapy device and the swivel elbow rotatable relative to the breathing tube. In other arrangements, the breathing tube assembly includes an elbow that can be coupled to the respiratory therapy device in one of several possible positions.

An expiratory limb is provided that is configured to remove humidified gases from a patient and configured to provide improved drying performance by providing a tailored temperature profile along the limb. Limbs for providing humidified gases to and/or removing humidified gases from a patient are also provided, the limbs having improved gas residence time at constant volumetric flow rate. The improved residence time can be achieved by providing a limb comprising multiple lumens.

An embodiment of a single use nitrous oxide solution delivery system can be used in a prehospital setting such as in ambulances. A container can be filled with a predetermined relative concentration of nitrous oxide and oxygen gases. The container is sized to be stored in a repository within an automated dispensing cabinet (ADC) for medications. The container is connected to a regulator which includes a main control dial configured to allow a health care provider to adjust the volumetric flow rate of the nitrous oxide and oxygen gas mixture used by a patient. A scavenger can be optionally connected to a patient's mask and configured to remove exhaled gas. Another embodiment of a single use nitrous oxide solution delivery system can be used within hospitals and other medical buildings.

A respiratory assistance device including a respiratory interface device configured to be worn by a user and deliver a gas, a gas temperature measurement unit configured to measure a gas temperature that is a temperature of the gas, a warming unit configured to warm the gas, and a temperature change unit configured to change the gas temperature by controlling the warming unit. The respiratory assistance device can administer comfortable respiratory assistance even during sleep.

Various control methods can indirectly determine incorrect connections between components in a respiratory therapy system. For example, incorrect connections can occur between a patient interface, a humidifier, and/or a gases source. The methods can indirectly detect if reverse flow conditions or other error conditions exist. A reverse flow condition can occur when gases flows in a direction different from an intended direction of flow. The methods can be implemented at the humidifier side, at the gases source side, or both.