32 results about "Expiratory Airflow" patented technology

A respiratory therapy device including a housing and an interrupter valve assembly. The housing is sized for handling by a patient and defines a patient breathing passage extending from a patient end and through which a patient inhales and exhales air. The interrupter valve assembly is carried by the housing and includes a control port, a valve body, and a drive mechanism. Expiratory airflow is released from the patient breathing passage through the control port. The valve body is sized to at least partially obstruct fluid flow through the control port. The drive mechanism moves the valve body relative to the control port in response to the expiratory airflow such that the valve body repeatedly transitions between a position of maximum obstruction and a position of minimum obstruction relative to the control port to create an oscillatory positive expiratory pressure effect.

A method and apparatus for of assessing the blood concentration level in a human or animal subject, of a volatile blood constituent (preferably alcohol) is disclosed. The method comprises steps of positioning a sensor (21, 22) within the expiratory gas flow of the subject, wherein the sensor (21, 22) is configured to detect the presence of the constituent and provide a first output signal representative of the concentration of said constituent in air, and also to detect a presence of carbon dioxide and to provide a second output signal representative of the concentration of carbon dioxide in air. The flow of expiratory gases from the subject is sampled to provide a first signal and second signal in respect of the expiratory gases substantially simultaneously. The method also comprises the step of inputting said first and second signals obtained by the sampling step into an algorithm configured to compare the variation of the first signal over time with the variation of the second signal over time and, depending on the result of the comparison, to make said second signal representative of the degree of dilution of said expiratory airflow. The invention further includes an apparatus for carrying out the method.

Airflow restriction systems are described herein which may be used to treat various disorders by creating expiratory positive airway pressure while providing for patient comfort regardless of the patient's anatomical variances. Such a device may be removably secured externally over the patient's nose rather than within the nasal passages to increase patient comfort. The restriction device may be secured, e.g., via an adhesive, to the patient and actuated via any number of mechanical or electromechanical mechanisms. Moreover, the restriction device may include one or more sensors to detect the patient's respiration activity Such that the device may be actuated to correspond to the patient's exhalation and squeeze or otherwise constrict the nasal passages at least partially by pressing against the exterior surface of the nose to restrict the expiratory airflow.

Embodiments of the invention relate to the technical field of virtual reality, in particular to a method for interacting with a virtual scene through a VR device, and a display system. The method comprises the steps of obtaining an airflow intensity value, wherein the airflow intensity value is detected by an airflow detection sensor in the VR device; and according to the airflow intensity value, obtaining corresponding image information and displaying the image information. According to the method and the display system, after the airflow intensity value is obtained, the corresponding image information can be obtained according to the airflow intensity value, and the image information is displayed, so that compared with a mode of performing interaction with the virtual scene through gesture identification or a gamepad, the method can be applied to the virtual scene related to expiratory airflow, so that immersive experience of a user can be fully developed and the application range of the VR device can be expanded.

An apparatus for quantifying a user's expiratory and inspiratory airflow includes an air tube adapted to be sealed over at least one of the nose or mouth of a user, a pressure sensor configured to be selectively fluidly connected with one of the air tube or an ambient environment external to the air tube, a valve assembly arranged between the air tube and the pressure sensor to switch between a measuring configuration in which the pressure sensor is fluidly connected with the air tube while fluid connection with the ambient environment is excluded, and a reference configuration in which the pressure sensor is fluidly connected with the ambient environment while fluid connection with the air-tube is excluded, and a data processing unit arranged to communicate with the pressure sensor and the valve assembly. The data processing unit is configured to provide instructions to the valve assembly to switch between the measuring and the reference configurations. The data processing unit is further configured to determine an absolute zero of expiratory and inspiratory airflow based on signals from the pressure sensor obtained while the valve assembly is in the reference configuration and to measure at least one of expiratory and inspiratory airflow while the valve assembly is in the measuring configuration. The processing unit is further configured to determine at least one of expiratory airflow limitation or inspiratory airflow limitation relative to the absolute zero airflow.

The invention discloses a decontamination device for decontaminating inhaled and/or exhaled gases in a ventilator. The decontamination device comprises a gas inlet and outlet for inspiratory and expiratory gas flow, and a chamber for gas flow. The chamber is configured to connect the gas inlet and outlet. The chamber comprises at least one ultraviolet (UV) light source integrate inside the chamber that preferably emits in the UVC range, wherein the UV light source is preferably a UVC light-emitting diode. The UV light source is configured to produce UV light to decontaminate contaminants in the inhaled and/or exhaled gases by minimizing the distance between the contaminants in the gas flow and the light source, maintaining the gas flow in a gas flow path long enough to deactivate the contaminants, increasing the intensity of the light source to optimize decontamination, and increasing turbulence to redirect the gas flow and prevent boundary layers and shadowing.

The invention discloses a noninvasive ventilator control system, and particularly relates to the technical field of ventilators. An airflow generator is located in the ventilator and can provide sufficient flow and pressure ranges, an expiration control valve can control gas conveying and conveying paths in the ventilator, a microprocessor receives data of the two actuators and controls the two actuators through an algorithm, and the airflow generator is connected with the expiration control valve. The airflow generator further directly controls the flow of gas conveyed to a patient and the pressure of gas passing through a main flow path, the expiration control valve is an electric proportional valve, and the output end of the expiration control valve is connected with a breathing flow control valve. When the ventilator provides expiration airflow for a patient, the airflow flow is appropriate, the pressure is moderate, the use experience of a user is improved, the problems that the airflow pressure and flow are too large and too small are solved, and stable supply of the airflow can be guaranteed.

The invention discloses an expiration pressure automatic titration method and system based on an expiration flow limited index; the method comprises the steps: in a maintenance stage, when a preset maintenance time is reached, calculating a current expiration flow limited index according to a negative expiration flow, an expiration peak flow and expiration time which are monitored in real time, and entering a regulation stage; determining whether the current expiratory flow limited index is smaller than the expiratory flow limited index at the end moment of the previous adjustment stage or not, and if yes, increasing the positive end expiratory pressure; if not, carrying out the operation of lowering the positive end expiratory pressure; and when the positive end expiratory pressure increasing operation or the positive end expiratory pressure decreasing operation is ended, recording the expiratory flow limitation index when the adjusting stage is ended. The exhaled air flow limitation index provided by the invention has vivid description significance and can be used as an indication of the actual exhaled air flow limitation degree; the method is relatively simple in calculation, does not need hardware support with high complexity requirements, and reduces the product cost.

The invention provides an adjustable lung separating ventilation component. The effects that the air flow of an inspiratory phase is adjustable and the air flow of an expiratory phase is not limited are achieved. The component can be connected to the tail end of the affected side of a double-lumen tube; in the inspiratory phase, the ventilation volume of oxygen inlet through an air inlet passage can be controlled through an adjusting knob; in the expiratory phase, the expiratory air flow is not blocked in an air outlet passage, which is beneficial to CO2 exhaust. Therefore, while appropriate ventilation is conducted on the affected side lung, surgical operation is not influenced, and it is avoided that air stays in the affected side lung; by means of the adjustable lung separating ventilation component, the ventilation way is simplified, single lung ventilation is improved, and negative effects brought by high concentration oxygen uptake are avoided.

A positive expiratory pressure-generating device for reducing breathlessness in a subject with one or more pulmonary disorders is disclosed. The device is rigid and hollow and can be held in the mouth of the subject. The device has at least one air chamber, at least one opening in the portion of the device that is held in the mouth and at least one additional airflow orifice. The device is configured to increase expiratory resistance and can be supported by the mouth of the subject without the need for additional support by hands, another device or other means.