Mindray Medical Sweden Ab

Ric Investments, Inc.

Shenzhen Mindray Bio-medical Electronics Co., Ltd.

Fas Medic S.a.

Transunit Ab

Fluid Automation Systems S.a.

Göran Cewers

Mathias Eklund

The present invention relates to a turbine ventilator having a fast response to the required inhalation of a subject connected to the ventilator. The turbine ventilator () comprises: a first valve () connectable to at least one breathing orifice of the subject; an inspiratory reservoir () having an adjustable volume, said inspiratory reservoir being fluidically connectable to said first valve; a turbine unit () fluidically connectable to the inspiratory reservoir, said turbine unit being fluidically connectable via said first valve to the at least one breathing orifice of the subject; and a control unit () configured to control said first valve for controlling a flow or pressure from the inspiratory reservoir and/or turbine unit to the subject based on setpoints.

Turbine ventilator system and method

A system and method for controlling a flow is disclosed. The system includes an inlet channel () and an outlet channel (). The inlet channel has an inlet port at a first end configured to be connected to a patient, and a second end with an at least part-annularly shaped aperture (). The outlet channel has an outlet port at a first end, and an aperture () at a second end. The system further comprises a flow channel arranged concentrically outside the at least part-annularly shaped aperture. The flow channel is in fluid connection with the outlet channel. The at least part-annularly shaped aperture of the inlet channel and the aperture of the outlet channel are separated by a seating means (). The at least part-annularly shaped aperture of the inlet channel and the flow channel are separated by the seating means.

Valve for controlling a flow

A device or method for stabilizing a voice coil is disclosed. The device comprises a voice coil for providing a motive force, and means for measuring a signal from said voice coil related to a motional electromotive force. The device further comprises a unit for controlling an amplification of said signal to create a force in said voice coil in a direction of said motional electromotive force.

System and method for stabilizing a voice coil

The disclosure pertains to a method of charging or discharging a capacitive element, such as a piezoelectric crystal. The disclosure also pertains to a device that implements charging of a capacitive element according to said method. The device comprises a bipolar buck-boost converter, whereby a capacitive element can be charged with both positive and negative voltages. The discharge of the capacitive element is provided with energy recovery and feedback to the device's power supply.

Driver circuit and method for controlling a capacitive element

A device for trimming the thickness of a mechanical body is disclosed. The trimming is performed by screwing a screw through a threaded hole and having the end of the screw pressing against the center of a disk element, which, by deformation, acts as a lever against an adjacent body.

Method and device for mechanical trimming

The disclosure pertains to a device and a method for compensating for heat expansion effects in solid materials, as well as a method for manufacturing the device.

Mechanical temperature compensation methods and devices

Methods and devices are described for reducing flow resistance in a flow restrictor during high flows.

Flow restrictor and method for reducing resistance of a flow

A mechanical amplifier and method for converting a small motion amplitude to a larger motion amplitude are disclosed. The method includes using two or more beams which are connected in series at angles to each other. Undesirable movements arising in the structure are absorbed by the structure through torsion. Each beam is a mechanical motion amplifier, and by connecting these in series, the total amplification is the product of the amplification of the comprised beams. The disclosure also pertains to a device comprising two or more beams connected together at an angle of 90 degrees in one embodiment.

Methods, systems, and devices for mechanical motion amplification

A method is described for measuring a flow of gas passing a flow meter device. The device causes a pressure drop when a gas flows through it. The pressure drop across the device is a measure of the gas flow. The device is configured as a gas permeable tube that has a flow channel on the upstream side along the tube configured so as to decrease the cross-section of the channel downstream of the gas permeable tube. This provides for a minimum volume in the channel upstream of the device's pressure-drop-generating component.

Method and system for measuring a flow

The invention pertains to a ventilator that delivers a flow of gas to an airway of a user, and to communicate a flow of gas from the airway of the user in a controlled manner. The ventilator includes a conduit () that carries a flow of gas from the airway of a patient, a first valve () coupled to the conduit and adapted to control a pressure or rate of the flow of gas exhausted from the conduit, a first sensor () coupled to the conduit and adapted to monitor a pressure of the gas in the conduit, and a controller () adapted to control the first valve based on an output of the first sensor. A restrictor () is provided in the conduit between the pressure sensor and the patient such that a first volume is defined in the conduit between the first valve and the restrictor and a second volume is defined in the conduit between the patient and the restrictor. The controller controls actuation of the first valve based on a pressure of the first volume monitored by the first sensor.

Expiratory pressure regulation in a ventilator

A system that provides a flow of gas to an airway of a user that includes a source of gas, a conduit that carries the flow of gas to the airway of a patient, a first valve that controls a pressure, flow, or volume, of the flow of gas, a pressure sensor coupled to the conduit between the valve and the patient that monitors a pressure of the gas in the conduit, and a controller that controls the valve based on an output of the pressure sensor. A restrictor is provided in the conduit between the pressure sensor and the patient that divides the fluid delivery system with a first smaller volume in the conduit between the valve and the restrictor and a second larger volume between the patient and the restrictor. The system controls the pressure, flow, or volume relative to the first volume.

Gas flow control in a ventilator

A ventilator includes a sensor to monitor a characteristic associated with the delivery of gas to the patient, such as pressure. A sensor power supply () is feeding a sensor in the form of a Wheatstone bridge. A first end () of the bridge is coupled to a first positive voltage source () and a second end () is coupled to a second positive voltage source (). A capacitor () is coupled to the second end of the bridge. A controller () controls the first and the second positive voltage sources so as to (a) disable the sensor by causing the first positive voltage source to provide substantially zero voltage to the first end of the Wheatstone bridge and by causing the second positive voltage source to provide a positive voltage to the second end of the capacitor, and to (b) enable the sensor by causing the first positive voltage source to provide a positive voltage to the first end of the Wheatstone bridge and by causing the second positive voltage source to provide a decreasing voltage to the second end of the capacitor.

Growing community of inventors

Limhamn, Sweden

Göran Cewers