5 results about "Expiratory Airflow" patented technology

Supplying therapeutic gas. At least one example is a method of providing therapeutic gas to a patient, the method comprising: sensing a signal indicative of an exhalation airflow from the patient, the exhalation airflow is non-zero and an airflow rate trending toward zero; sensing, during the exhalation airflow, a change in the airflow rate prior to a contiguous inhalation; and delivering a bolus of therapeutic gas to the proximal end of nasal cannula responsive to the change in the airflow rate.

This invention relates to the field of respiratory masks and discloses a respiratory therapy system and method based on mask structure optimization, including a respiratory therapy device and a mask body connected thereto. The mask body has an inlet pipe, an outlet pipe, and a liquid collection frame. A movable valve is installed inside the outlet pipe, and a flip-up liquid-blocking device is installed at the liquid inlet at the upper end of the liquid collection frame. The movable valve and the liquid-blocking device are connected by a linkage rod, and the liquid-blocking device is reset by a torsion spring. After the therapeutic gas enters the mask body through the inlet pipe, it is buffered and dispersed by an airflow buffering and guiding structure to reduce the direct impact of airflow on the patient's mouth and nose. Condensate or atomized residue formed during treatment can enter the liquid collection frame. When the patient exhales, the movable valve moves to the pressure relief position, allowing the exhaled gas to be discharged through the outlet pipe. Simultaneously, the linkage rod drives the liquid-blocking device to flip to the blocking position to block the liquid inlet and prevent the exhaled airflow from disturbing the liquid in the collection frame. After exhalation, the liquid-blocking device returns to the open position.

The present application provides a snoring treatment instrument, comprising a vibration part. The vibration part is provided with an air inlet, a first cavity in communication with the air inlet, a second cavity in communication with the first cavity by means of a communication port, and a plurality of air outlets in communication with the second cavity, and comprises a switching valve. The switching valve is at least partially located within the communication port in a natural state and can open the communication port under the blowing of an exhalation airflow, thereby enabling the vibration part to generate a vibration sound wave with a frequency of 20-200 Hz. Using the snoring treatment instrument provided in the present application can accurately exercise the upper respiratory tract muscles, thereby strengthening the upper respiratory tract muscles and treating snoring.

This invention discloses a method for evaluating the quality of expiratory movements based on multi-branch convolution and attention mechanisms. The steps include: S1 acquiring temporal data of expiratory airflow and performing normalization processing; S2 constructing first-order and second-order variation features of the expiratory airflow; S3 introducing energy features based on local time windows, calculating the energy of the first-order variation features of the expiratory airflow, and obtaining local energy intensity features; S4 concatenating the original airflow features, variation features, and local energy features to construct a unified multi-channel temporal feature representation; S5 dividing the expiratory movement into stages and extracting multi-branch features within each stage; S6 introducing a temporal attention mechanism to high-frequency related features to locate the specific time position of anomalies; and S7 outputting the probability distribution of expiratory movement quality to determine the quality evaluation result of the expiratory movement. This method improves the accuracy of expiratory movement quality evaluation and makes the differentiation of anomaly types more detailed.

A measurement arrangement for measuring carbon dioxide partial pressure of exhaled air from a person includes a calculation unit, a carbon dioxide analyser device, and a gas conduit assembly. A perturbation volume member is provided, defining a predetermined known perturbation volume, and configured to be selectively connected and disconnected to a person such that both inspiratory and expiratory air flows can pass either through the perturbation volume member or not, thereby introducing a variation of the determined end-tidal carbon dioxide. The perturbation volume member is either a gas conduit, or a perturbation space conduit which is configured to be connected to and disconnected from the gas conduit. The calculation unit is configured to calculate the effective pulmonary blood flow (EPBF) and the effective lung volume (ELV) based upon these induced variations of the determined end-tidal carbon dioxide partial pressure, the known perturbation volume, and a respiratory rate.