摘要:
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.
摘要:
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.
摘要:
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 O2 in 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 O2 level between the first and second points in time.
摘要翻译:在用于确定机械通气患者的最终专家肺容积(EELV)的呼吸机和呼吸机控制单元的方法中,呼吸气体被提供给具有第一固定的N 2 / O 2气体组成的患者,至少直到N2 / O2气体组成在空气中从患者中过期是不变的。 至少一次,在第一预定时间点,将呼吸气体中的N 2 / O 2气体组成改变为第二固定组合物。 测量每个呼吸患者呼出的N 2 / O 2气体成分的变化,直到在至少两个随后的宽度中的期望O2的水平基本稳定的第二时间点为止。 在呼吸机呼气管的下游进行测量。 每个呼吸确定总气体体积,并且基于第一和第二时间点之间的O2水平的变化来确定患者肺的EELV。
摘要:
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.
摘要:
The invention relates to an arrangement in connection with a feedback control system, the arrangement comprising a controllable device (10), a measuring device (7), a controlling device (9) and a user interface by which the controlling device (9) can be monitored by means of set values. The measuring device (7) is adapted to measure a measuring value (8) from a measuring point, which measuring value is dependent on the operation of the controllable device and the controlling device (9) is adapted to monitor the controllable device (10) on the basis of the measuring value and set values. To improve safety, the arrangement comprises means (15a, 15b, 15c) adapted to feed a reference signal (16) to the measuring device (7) periodically. The controlling device (9) is adapted to compare a measuring value (18) obtained from the reference signal with the real reference value (17) of the reference signal and adapted to take a safety measure when the measuring value (18) and the real reference value (17) differ substantially from each other.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
The invention relates to an arrangement in connection with equipment used in patient care, the arrangement comprising a controllable device (2a, 2b), a measuring device (5a, 5b) adapted to measure a measuring signal dependent on the controllable parameter, a measuring point of the measuring signal, a transmission link (21, 22) between the measuring point of the measuring signal and the measuring device, which transmission link requires a separate connection, whereby the measuring device (5a, 5b) 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 (20) and a control unit (7a, 7b) 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 (7a, 7b) is adapted to disconnect the control of the controllable device (2a, 2b) based on the measuring value when the measuring value obtains a reference value.