Maquet Critical Care Ab

Instrumentarium Corporation

Ge Healthcare Finland Oy

Mario Loncar

Christer Ahlmén

Åke Larsson

Pär Emtell

Stefan Broborg

Carl-Erik Troili

Antti Särelä

Mats Wallin

Erkki Paavo Heinonen

Magnus Hallbäck

Erik Cardelius

Petter Videbrink

Ulrika Bergqvist

Mikael Kock

Pekka Meriläinen

Petter Fogelbrink

A gas tank arrangement for a breathing apparatus, including: a gas tank; an inlet valve configured to control a flow of gas into said gas tank; an outlet valve configured to control a flow of gas out of said gas tank and towards a patient; and a controller configured to control said inlet and outlet valves to maintain the gas within said gas tank at an overpressure for subsequent delivery to the patient, to control the outlet valve based on a parameter that is indicative of pressure within the gas tank, and to control the inlet and outlet valves to always maintain the pressure in the gas tank between a minimum pressure threshold value and a maximum pressure threshold value, wherein the minimum or maximum pressure threshold value is determined based on preset parameters relating to the dynamics of said outlet valve, or a desired minimum or maximum flow of gas out of the gas tank.

Vaporizer arrangement for a breathing apparatus

An anesthesia system has a unit for measuring oxygen concentration delivered to a patient, a unit for sending an alarm to an operator if the measured oxygen concentration is below a first threshold value, and a unit for automatically increasing a setting of oxygen in a fresh gas setting, so that the oxygen concentration delivered to a patient is increased, if the measured oxygen concentration is below a second threshold value. The system allows for increased safety or a lowered fresh gas flow with a maintained safety level.

Anesthesia system, a method and a computer-readable medium for actively controlling oxygen delivered to a patient

A vaporizer arrangement for a breathing apparatus serves the double purpose of vaporizer and pressurized supply of vapor-containing gas for direct delivery to a patient. The vaporizer arrangement has at least a first gas inlet channel for conveying a flow of a carrier gas into a vaporization chamber, a vaporizer for vaporizing a liquid into the carrier gas in the vaporization chamber, and a gas outlet channel for conveying a flow of vapor-containing carrier gas out of the vaporization chamber and toward the patient. The vaporizer arrangement further has a gas flow regulator that maintains the carrier gas within the vaporization chamber at an overpressure, and that controls the flow of vapor-containing carrier gas out of the vaporization chamber in a variable manner.

A ventilation system provides patient-triggered support ventilation to a spontaneously breathing patient during ongoing high frequency ventilation (HFV), and has a pneumatic unit operated by a control computer for delivery of breathing gas in response to an effort to breathe by the patient, and an oscillator for superimposing high frequency oscillation onto the breathing gas. The system further includes a bioelectric sensor that measures a bioelectric signal indicative of the patient's efforts to breathe, and the control computer controls the delivery of breathing gas in response to the patient's effort to breathe, based on this bioelectric signal. The ventilation system is hence designed for neurally triggered support ventilation during ongoing HFV, which makes the trigger mechanism of the ventilation system more precise and robust compared to known trigger mechanisms of HFV ventilation systems.

Neurally triggered support ventilation during high frequency ventilation

A flexible patient cassette that can be optimized for different types of breathing circuits, different drive circuits and different patient categories has a first inlet arranged to be connected to a drive circuit, and at least a second inlet arranged to be connected to a patient connector, the first and second inlets being pneumatically connected with each other through a gas conducting passage constituting a patient circuit having a certain volume. The patient cassette has a volume-varying arrangement for varying the patient circuit volume to allow that volume to be varied in dependence of at least one of the type of breathing circuit in which the patient cassette is used, the type of drive circuit to which the patient cassette is connected, and the tidal volume of a patient connected to the patient connector.

Patient cassette with variable patient circuit volume

A respiratory anesthetic aggregate devised for coupling to a breathing apparatus has an anesthetic gasifier unit that has a breathing gas input port connected to a first point in an inspiratory patient gas delivery path of a breathing apparatus, and a fresh gas output port connected to a second point in the patient gas delivery path downstream the first point. The inspiratory patient gas delivery path is connected via a mainstream connection between the first and second point. Thereby the anesthetic gasifier unit is connected in a sidestream configuration to the patient gas delivery path for adding the gasified anesthetic agent in a desired concentration to the patient gas delivery path at the second point. When aggregate is coupled to a breathing apparatus, a substantially volume neutral delivery of anesthetic agent is provided to the breathing apparatus.

Device, an aggregate and a method for providing a gasified anesthetic agent

In a method, ventilator and ventilator control unit for determining an end-expertorial lung volume (EELV) for a mechanically ventilated patient, a breathing gas is provided to the patient that has a first fixed N2/O2 gas composition, at least until the N2/O2 gas composition in air expired from the patient is constant. At least once, at a first predetermined point in time, the N2/O2 gas composition in the breathing gas is changed to a second fixed composition. The change in the N2/O2 gas composition exhaled by the patient for each breath is measured until a second point in time at which the level of expired Oin at least two subsequent breadths is substantially stable. The measurement is made downstream of the expiratory tube of the ventilator. The total gas volume is determined for each breath, and the EELV of the patient's lungs is determined based on the change in Olevel between the first and second points in time.

Method and apparatus for lung volume estimation

A delivery apparatus for pressurized medical liquids has a primary reservoir that pressurizes a medical liquid therein to a driving pressure, a second reservoir having an inlet connected to receive pressurized liquid from the primary reservoir via a controllable intermediate valve, and an outlet for discharge of the received medical liquid via a controllable dosing valve. A pressure measuring unit measures the pressure in the secondary reservoir and a control unit controls the intermediate valve and the dosing valve by monitoring the operation of the intermediate valve and the dosing valve dependent on the measured pressure value from the pressure measuring unit. The control unit generates a status signal dependent on predetermined rules for measured pressure changes compared with calculated pressure changes.

Dosing safety arrangement in a delivery apparatus for pressurized medical liquids

An anaesthesia apparatus has a control unit that controls a gas flow of a flushing gas through at least part of the anaesthesia apparatus so as to flush anaesthetic agent from the apparatus when the apparatus is not connected to a patient. In this way the remaining anaesthetic agent can be removed from the anaesthesia apparatus after use before connecting another patient. Pre-use check of the apparatus can be performed automatically.

Anaesthesia apparatus and method for operating an anaesthesia apparatus

An anaesthetic device has a manual ventilation bag, a mechanical ventilator and a user interface for setting an operating mode, including mechanical ventilation via the mechanical ventilator and manual ventilation via the manual ventilation bag, and for setting parameter values for the operating mode that has been set. The anaesthetic device further has a remote control for wireless transmission of commands to the user interface. The user interface is adapted to carry out the commands from the remote control only when the anaesthetic device is set for manual ventilation.

Anesthesia apparatus with remote control during operation in a manual ventilation mode

The invention relates to an arrangement in connection with a feedback control system, the arrangement comprising a controllable device (), a measuring device (), a controlling device () and a user interface by which the controlling device () can be monitored by means of set values. The measuring device () is adapted to measure a measuring value () from a measuring point, which measuring value is dependent on the operation of the controllable device and the controlling device () is adapted to monitor the controllable device () on the basis of the measuring value and set values. To improve safety, the arrangement comprises means () adapted to feed a reference signal () to the measuring device () periodically. The controlling device () is adapted to compare a measuring value () obtained from the reference signal with the real reference value () of the reference signal and adapted to take a safety measure when the measuring value () and the real reference value () differ substantially from each other.

Arrangement in connection with feedback control system

A tube for use in an anesthetic system has an essentially cylindrical housing. More effective take-up of carbon dioxide is achieved by an absorbent for carbon dioxide that is arranged within the tube.

Tube for use in an anesthetic system

An anesthetic delivery system has a delivery unit containing a carbon dioxide retaining element and a reversible action anesthetic absorber/desorber for releasably retaining therein at least a portion of a charge of anesthetic agent. An externally accessible first internal flow section in the delivery unit directs gas through the delivery unit first through the anesthetic absorber/desorber and then through the carbon dioxide retaining element, sequentially. An externally accessible second internal flow section directs gas through the delivery unit via the anesthetic absorber/desorber and bypassing the carbon dioxide retaining element.

Anaesthetic delivery system

The invention relates to an arrangement in connection with equipment used in patient care, the arrangement comprising a controllable device (), a measuring device () adapted to measure a measuring signal dependent on the controllable parameter, a measuring point of the measuring signal, a transmission link () between the measuring point of the measuring signal and the measuring device, which transmission link requires a separate connection, whereby the measuring device () is adapted to convert the measuring signal into measuring value which correlates with the operation of the controllable device, and the arrangement further comprising a user interface () and a control unit () adapted to control the controllable device on the basis of the measuring value and the set values. To minimize damages, the arrangement is adapted to compare the measuring value with the reference value of the environment and the control unit () is adapted to disconnect the control of the controllable device () based on the measuring value when the measuring value obtains a reference value.

Arrangement in connection with equipment used in patient care

A device for exchanging gas volumes in an anesthetic system has an inlet, an outlet, a first chamber arranged between the inlet and the outlet, a second chamber arranged between the inlet and the outlet, a switching valve for selective connection to the first chamber or the second chamber for forming a flow path between the inlet and the outlet, and a controller for controlling the switching valve.

Growing community of inventors

Ekerö, Sweden

Mario Loncar