130 results about "Respiratory pressure" patented technology

An oscillating positive respiratory pressure apparatus and a method of performing oscillating positive respiratory pressure therapy. The apparatus includes a housing having an interior chamber, a chamber inlet, a chamber outlet, an exhalation flow path defined between the inlet and the outlet, and a restrictor member rotatably mounted within the interior chamber. The restrictor member has an axis of rotation that is substantially perpendicular to the flow path at the inlet, and includes at least one blocking segment. Rotation of the restrictor member moves the at least one blocking segment between an open position and a closed position. Respiratory pressure at the chamber inlet oscillates between a minimum when the at least one blocking segment is in the open position and a maximum when the at least one blocking segment is in the closed position. By exhaling into the apparatus, oscillating positive expiratory pressure therapy is administered.

Methods and apparatus perform periodic breathing detection, such as Cheyne-Stokes respiration detection. The detection may be performed by one or more processors, such as by analysis of data from one or more sensors. In some cases, the detection may be based on an electrocardiogram (ECG) signal, such as from ECG electrodes and/or an accelerometer signal, such as from an accelerometer. An occurrence of periodic breathing may be detected based on features derived from the signal(s). For example, detection may be based on deriving a respiration signal from the sensed signal(s) and/or analysis of RR interval times or relative QRS amplitude values, which may be evaluated on a segment-by-segment basis. The detection may provide monitoring and reporting of the occurrence of periodic breathing by a monitoring device and/or provide a basis for controlling changes to a provided respiratory treatment or therapy, such as by a respiratory pressure therapy device.

A respiratory pressure therapy (RPT) device is disclosed for treatment of respiratory-related disorders. The RPT device includes a pressure generator, a pneumatic block, a chassis and a device outlet for delivering a supply of flow of gas to a patient interface. The RPT device also comprises an integrated humidifier including a water reservoir. An RPT device is also disclosed that includes a wireless data communication interface integrated with the housing and configured to connect to another device or a network.

Apparatus and methods provide compliance management tools such as for respiratory pressure therapy. In some versions, a respiratory pressure therapy system may include one or more processors, such as of a data server, configured to communicate with a computing device and/or a respiratory pressure therapy device. The respiratory pressure therapy device may be configured to deliver respiratory pressure therapy to a patient for a session. The computing device may be associated with the patient. The processor(s) may be further configured to compute a therapy quality indicator of the session from usage data relating to the session. The therapy quality indicator may be a number derived from contributions of a plurality of usage variables for the session in the usage data. The processor(s) may be further configured to present, such as by transmitting, the therapy quality indicator to the computing device. The therapy quality indicator may promote patient compliance.

A respiratory treatment device includes a housing enclosing a chamber, a chamber inlet configured to receive a flow of air into the chamber, a first chamber outlet configured to permit the flow of air to exit the chamber, and a second chamber outlet configured to permit the flow of air to exit the chamber. A vane mounted within the chamber is configured to rotate between a first position where the flow of air is directed to exit the chamber through the first chamber outlet, and a second position where the flow of air is directed to exit the chamber through the second chamber outlet. A blocking member disposed on the vane is moveable relative to the chamber inlet between a closed position where the flow of air through the chamber inlet is restricted, and an open position where the flow of air through the chamber inlet is less restricted.

Methods and Systems implement patient management. In some cases, a patient management system 200 may include one or more respiratory pressure therapy devices to deliver respiratory pressure therapy to patients, and generate therapy data relating to a therapy session for a patient. The patient management system may include a data server communicating with the therapy device(s). The data server may compute, from therapy data, therapy summary data for the session, the summary data may include one or more statistics summarising therapy data. The patient management system may include a therapy management server communicating with the data server. The therapy management server may apply one or more rules to the summary data, update or generate one or more workflow groups of patients, each workflow group corresponding to a rule, depending on results of the respective rule applications; and/or serve a graphical layout representing one or more workflow groups.

Respiratory pressure treatment apparatus include automated methodologies for controlling changes to pressure in the presence of sleep disordered breathing events. In an example apparatus, various levels of expiratory pressure relief can provide different pressure reductions for patient comfort during expiration (333-A, 333-B, 333-C). The control parameters for these levels may be automatically modified based on the detection of an open airway. Similarly, in some embodiments, the levels may be automatically adjusted based on a detection of persistent obstruction. In still further embodiments, control parameters associated with a rise time of an early portion of an inspiratory pressure treatment may be automatically adjusted upon detection of flow limitation to permit a change to more aggressive waveforms from more comfortable waveforms for the treatment of sleep disordered breathing events.

Methods and apparatus provide automated circuit disconnection monitoring such as for a respiratory apparatus or system. Disconnection of a patient circuit, including a patient interface and air delivery circuit, may be detected and a message or alarm activated. In some versions, detecting occurrences of circuit disconnection event(s), such as by a processor, may be based on an instantaneous disconnection parameter as a function of a disconnection setting. The disconnection setting may be determined based on patient circuit type. The instantaneous disconnection parameter may be determined from detected pressure and flow rate, and may be, for example, a conductance value or an impedance value. Disconnection events may be qualified by one or more detected respiratory indicators. In some cases, instantaneous impedance or conductance may be used to assess re-connection of a patient circuit, detection of flow starvation, determine breath shape for triggering and cycling and to detect patient or circuit obstructions.

The invention relates to a respirator, and discloses a breathing pressure fuzzy control type respirator and a breathing pressure fuzzy control method. The breathing pressure fuzzy control type respirator controls action of each part by means of actual control output of fuzzy piping and instruments diagram (PID) controller in a template embodiment, and each sensor collects signal variable of each part and transfers to the fuzzy PID controller to do fuzzy control operation. An air suction electromagnetic proportional valve is capable of controlling opening of a valve hole to continuously vary in a certain range according to corresponding control signal (voltage or current signal). The fuzzy PID controller is capable of controlling flow which enters back stage gas channel to continuously vary in a certain range through controlling opening of each valve and further controlling airway pressure. Breath becomes more comfortable and safer after patients using the respirator.

The invention refers to a method for the regional determination of the alveolar opening and alveolar closing of the lung depending on the respiration pressure, wherein according to the method of electrical impedance tomography, an impedance signal is measured in at least one lung zone depending on the respiration pressure. The alveolar opening or closing of a lung zone is determined, in particular to enable an improved artificial respiration.

The invention belongs to the field of oxygen supply, and relates to a method for detecting breathing state during pulse oxygen supply. The method is characterized by comprising the following steps: detecting breathing pressure by using a pressure sensor; judging the breathing state by using a three-point pressure detection method; and performing correction by using a pressure detection lag method and a breathing experience judgment method as aiding methods so as to improve the accuracy for judging the breathing state. A voltage signal output by the pressure sensor is amplified by a signal amplification circuit, the amplified voltage signal is transmitted to an analog-digital conversion port of a main control chip and is transmitted to the main control chip after the analog-digital conversion, and the main control chip judges the breathing state through the method for detecting the breathing state; and a high-degree voltage regulator circuit supplies high-precision reference voltage to the analog-digital conversion so as to eliminate incorrect judgment caused by jitters of the reference voltage and improve the accuracy for judging the breathing state; and besides, the oxygen supply frequency is completely determined by a breather so as to eliminate phenomena of missed blowout and continuous blowout.

The invention relates to a sleep respiratory disturbance detecting device which comprises a respiratory pressure sensing module used to detect respiratory pressure data, a blood oxygen detecting module used to detect blood oxygen data, a module / digital conversion module connected with the respiratory pressure sensing module and the blood oxygen detecting module, a single-chip microcomputer connected with the module / digital conversion module, a storage module connected with the single-chip microcomputer, and an interface circuit module connected with the storage module. The device can simultaneously detect the blood oxygen date and the respiratory pressure value data of a human body, a defect that the detection data of the prior sleep respiratory disturbance diagnostic equipment is single is solved, simultaneously, the defects that the detection electrode of the prior multi conductor sleep recording instrument is numerous, and a detecting procedure is complicated are overcome.

The invention relates to the field of medical instruments and particularly discloses a mechanical ventilation control method of a positive pressure respirator and the respirator. According to the mechanical ventilation control method of the positive pressure respirator, the respiration state is judged by a microcontroller according to air pressure and air flow, the pressure information is used as the input parameter of a PID controller, a control voltage is obtained after the pressure information is input into the PID controller, then an air supply device is controlled, and pressure is provided for a respiration catheter; a next inspiration time is predicted during the expiratory phase, the respirator is controlled to release pressure in advance during the inspiratory phase, and the respirator is controlled to generate positive pressure support at the tail stage of expiration. The mechanical ventilation control method of the positive pressure respirator and the respirator have the advantages that predetermined respiration pressure can be obtained fast, and pressure fluctuation is reduced; due to the fact that the pressure is released in advance before the inspiratory phase, man-machine synchronism is improved; in addition, due to the fact that the positive pressure support is added at the tail stage of expiration, the respirator can better conform with human body respiration physiological characteristics, and the problem that an air passage is closed again due to over low pressure support is solved.

A system for sensing respiratory pressure includes a portable pressure transducer configured to be carried by or proximate to a respiratory conduit, such as a breathing circuit or a nasal canula. The portable pressure transducer may removably couple with a pneumotach, in the form of an airway adapter, disposed along the respiratory conduit. The pneumotach may include two pressure ports positioned at opposite sides of an obstruction, which partially blocks flow through a primary conduit of the pneumotach. Corresponding sample conduits of the portable pressure transducer removably couple with the pressure ports. The pressure ports may have sealing elements which are configured to seal against piercing members of the sample conduits upon introduction of the piercing members therethrough. Upon removal of the piercing members, the sealing elements substantially reseal. Methods for using the system are also disclosed.

One form of the present technology includes a fluid connector for delivery of breathing gas to a patient from a respiratory pressure therapy device, the fluid connector including a first end with a first opening to deliver a fluid flow, a seal portion extending around a periphery of the first opening, and a latching portion, a second end with a second opening to receive the fluid flow, a sealing surface extending around a periphery of the second opening and configured to engage the seal portion to form a face seal, and a complementary latching portion configured to engage with the latching portion

Apparatus and methods for a MEMS-fabricated variable capacitor. In one embodiment the capacitor is a comb drive comprising a plurality of plates interdigitated with a corresponding blades. As the plates move relative to the blades, the capacitance of the sensor changes. The capacitor is sufficiently sensitive to measure respiratory pressure in an animal.

An apparatus for generating and providing a pressurised breathable gas to a patient's airways includes a respiratory pressure therapy (RPT) device having an engagement port pneumatically and electrically coupled to the RPT device, and an air delivery tube configured to engage the engagement port so as to pass a flow of breathable gas to a patient interface. The air delivery tube includes electric contacts associated with a heating and/or a sensing arrangement. The air delivery tube includes a locking collar rotatably movable between (1) an unlocked position to allow connection/disconnection of the air delivery tube to/from the engagement port, and (2) a locked position to releasably lock the air delivery tube to the engagement port. The air delivery tube is structured and arranged to, when the locking collar is rotated into the locked position, pneumatically connect to the engagement port and define an operational configuration of the apparatus.

Methods or systems (7000) are implemented for treatment with or monitoring use of respiratory pressure therapy device(s). The device may be for a respiratory disorder. A processor, such as a processor of a server communicating with the therapy device, may analyse data relating to respiratory therapy delivered by the device. The processor may generate data in the processor representing a prediction, such as compliance prediction(s), about progress of therapy based on the analysis. The processor may select an action to improve therapy based on data representing the prediction. The processor may take or prompt selected action to improve the therapy. In some cases, a processor may analyse usage data concerning a period of days with a therapy device and generate compliance prediction indicators based on the analysis. The indicators indicate whether compliance will be likely. The processor may recommend engagement action to improve compliance based on evaluation of the indicators.

A method and apparatus to deliver a variable flow of oxygen to a patient is described. The apparatus may include a flow control valve, a pressure sensor to detect a patient's breathing pressure and ambient pressure, an oxygen flow analyzer to measure oxygen flow to the patient, and a processor to analyze the breathing pressure values, ambient pressure value, and oxygen flow rate values and to determine when a patient is inhaling. When the processor determines the patient is inhaling, the processor calculates an optimal oxygen flow rate to deliver to a patient, which may depend on a pre-selected flow rate and an oxygen backlog, and the processor sends a signal to the flow control valve to deliver the optimal oxygen flow rate to the patient.