56 results about "Ventilator circuit" patented technology

Various valves, adapters, ventilator circuits, and methods are disclosed. In one or more embodiments, a valve includes a support that includes a plurality of apertures. The support includes a center and an outer edge. The plurality of flaps includes a flap for each aperture. Each flap has an end connected proximal to the center of the support. Each flap is capable of moving between a closed position and an opened position.

The method and system are for sealing / unsealing (regulating) airway leaks occurring between the ventilator circuit and respiratory airways during lung ventilatory support in response to myoelectrical activity of diaphragm. Myolectrical activity of a patient's respiratory-related muscle is sensed to detect respiratory effort, and to produce a myoelectrical signal representative of the sensed muscle myoelectrical activity. Respiratory flow and pressure can also be measured to produce respective respiratory pressure and respiratory flow signals. A logic trigger sealing / unsealing of airway leaks in relation to the myoelectrical signal, respiratory flow signal and / or respiratory pressure signal to assist respiration of the patient. The amplitude of the myoelectrical signal is compared to a given threshold, and airway leaks are sealed when the amplitude of the myoelectrical signal is higher than this threshold. Increment of myoelectrical signal amplitude can be also detected to trigger the airway leak regulating device to seal the airway leaks, while decrement of the myoelectrical signal amplitude can be detected to unseal the airway leaks and thus permit air evacuation from the patient's lungs.

Various valves, adapters, ventilator circuits, and methods are disclosed. In one or more embodiments, a valve includes a support that includes a plurality of apertures. The support includes a center and an outer edge. The plurality of flaps includes a flap for each aperture. Each flap has an end connected proximal to the center of the support. Each flap is capable of moving between a closed position and an opened position.

The invention provides a combination of a micro pump 27 or a micro valve with a vibrating mesh nebuliser 2. This is powered by a controller 3. The controller 3 may have modifications to provide the electrical drive mechanism for the pump 27 in addition to fulfilling the aerosol / nebuliser drive requirements. In one case the system is used for humidifying gas in a ventilator circuit. A humidifying agent (sterile water or sterile saline) is aerosolised and then delivered to a ventilator circuit 100 coupled to the respiratory system of a patient.

An improved tracheal tube anti-disconnect device for securing a ventilator tube to an adapter that is connected to a tracheal tube. The device is comprised of a neck band that includes a pair of anchoring strips that releasably connect the neck band to a neck plate, an anti-disconnect fastening assembly that releasably secures to the neck band and which positively retains a ventilator circuit in communication with the tracheal tube. A retention system is provided on the neck band to prevent the anti-disconnect fastening assembly and the anchoring strips from disconnection with the neck band, thereby ensuring the communication between the ventilator circuit and the tracheal tube.

Gas leakage from a ventilator circuit and patient interface is estimated by a method that relies on breath-by-breath or time-to-time variability in the pattern of pressure delivery by the ventilator, comprising generating signals that correspond to pressure (PCIRCUIT) and flow rate (Flow) in the ventilator circuit, integrating flow (Integrated Flow), measuring the change in Integrated Flow (ΔV) over an INTERVAL extending from a selected point in the expiratory phase of a ventilator cycle to a selected point during the expiratory phase of a nearby ventilator cycle, repeating the measurement of ΔV for at least two said INTERVALs, processing PCIRCUIT to produce an index or indices that reflect(s) the pattern of pressure delivery by the ventilator during each of said INTERVALs, applying statistical methods to determine the relation between the differences in ΔV among 1NTERVALs and the corresponding differences in said index or indices of PCIRCUIT, and establishing from said relation the leak rate at specified PCIRCUIT values.