• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a device for the control gas flow from a respiratory system connected to a patient by exhaling. The river control is done by subjecting a flexible joint between two pipes to a radial force directed towards the center axis of the pipe, whereupon the flexible joint is pressed against a rotationally symmetrical body in the pipes. The axial force is generated by a movable ring which by a single actuator device compresses a bellows with a flexible rudder section coinciding with the rudders. The device consists of autoclavable parts or disposable parts which can be separated from the respiratory system without exposing personnel, who handle said system, to contaminated surfaces in the respiratory system when changing patients. To be published with Fig. 2
    公开号:SE1050490A1
    申请号:SE1050490
    申请日:2010-05-17
    公开日:2011-11-18
    发明作者:Goeran Cewers
    申请人:Mindray Medical Sweden Ab；
    IPC主号:
    专利说明:

    Contaminated parts of the valve. Furthermore, it is desirable that the construction is small and light and that the actuator that controls the valve can be made small and isolated from the flow channel.
    The most common design of exhalation valves today consists of a circular disc that lies against one end of a tube that forms a valve seat. Examples of such a design can be read in patent US 5,127,400. The disadvantages of such a design are that the flow channel is complex, which causes turbulence and problems with cleaning. In addition, the entire circular disc is subjected to a pressure, while the flow depends only on the outer edge of the disc. This means that an unnecessarily strong, heavy and expensive actuator is needed to control the valve.
    The object of the invention is to make a valve which fulfills the previously mentioned important design parameters.
    Summary of the invention These objects are achieved by means of the device and the method according to the appended independent claims, wherein particular embodiments are dealt with in the dependent claims.
    The present invention thus seeks in particular to counteract, improve or eliminate one or more of the above-identified shortcomings and disadvantages in conventional technology, individually or in any combination, and at least partially solves the above-mentioned problems by providing an equipment according to the appended claims.
    According to a first aspect of the invention, there is provided a fluid controlled exhalation valve for controlling fluids from a respiratory system connected to a patient on exhalation. The fluid-controlled exhalation valve comprises a gas duct for exhaled gas with at least two pipe sections, at least one fluid-filled element with at least one flexible wall coinciding with the inner channel of the pipes forming the gas duct and at least one, between two of said pipe sections, along the flow direction. Is partly arranged opposite the flexible wall of the gas duct. A mechanical interface comprising at least one actuator unit is arranged to transmit a pushing or pulling movement on the fluid-filled element whose flexible wall then expands or contracts transversely with respect to the flow direction and presses against or is drawn away from the rotationally symmetrical body whereby the gas flow in the gas channel can be controlled. .
    Through this construction, the fluid flow, for example a gas, can be controlled from a breathing system. The advantage of this construction is that unnecessarily strong, expensive and heavy actuators are not needed, which is the case today at the same time as the flow channel design becomes complex, which gives rise to Instead, you can with light turbulence and problems with cleaning. this design achieves a valve that is both small, and that the actuator that controls the valve can be made small and isolated from the flow channel.
    Another advantageous embodiment of the fluid-controlling expiratory valve comprises that the fluid-controlling expiratory valve can be docked together with a carrier comprising at least one actuator unit connected to the mechanical interface.
    The carrier here comprises a chassis part, docking brackets, spacer plate, actuator unit and a strut, the rest belongs to the valve. Through this construction, the various parts can be safely separated, for example when cleaning the hose system and the carrier together with the chassis can be kept uncontaminated.
    Another advantageous embodiment of the fluid control exhalation valve comprises that at least one actuator unit is in direct connection with the mechanical interface.
    The mechanical interface comprises the mechanical parts located between the actuator unit and the bellows-like part of the fluid-filled element. Among other things, it includes a movable ring that serves as a piston against the bellows. In some embodiments, the fluid control exhalation valve comprises that a leakage channel is located from the fluid in at least one fluid-filled element to the ambient air.
    This has the task of avoiding that the ambient temperature and atmospheric pressure should affect the volume of the bellows filled with fluid. The leakage channel has its main purpose when the fluid-filled element is in its rest position when it releases gas with a higher pressure than the atmospheric pressure.
    Without it, the flexible wall of the fluid-filled element would either bulge out or into a rest position depending on temperature and atmospheric pressure.
    In some embodiments, the fluid controlling exhalation valve comprises that a non-return valve acting in the direction of the fluid is located between the fluid in the fluid-filled element and the ambient air.
    The function of this valve is to fill the bellows of the fluid-filled element with gas. Without this non-return valve, the bellows would be empty in the rest position because the leakage channel together with a working valve would empty the bellows.
    In some embodiments, the fluid control exhalation valve comprises that the fluid in the flexible member be a gel.
    By using a gel, you avoid the need to use a non-return valve and a leakage channel.
    In some embodiments, the fluid control exhalation valve comprises the fluid in the flexible member being a liquid.
    When using a secure closed bellows, the fluid in the bellows can be replaced with a liquid which then works in a similar way as when using a gel.
    Another advantageous embodiment of the fluid control exhalation valve comprises that the at least one actuator unit is constituted by a piezo actuator.
    This means that the advantages of piezons of being small and light and cheap can be utilized, which leads to a small valve being built whose control actuator can be isolated from the flow channel.
    In some embodiments, the fluid control exhalation valve includes at least one piezo actuator in series with a mechanical motion amplifier.
    Since the motion amplitude of a piezo actuator is relatively small, it needs to be amplified, which here is advantageously done via a mechanical motion amplifier.
    In some embodiments, the fluid control exhalation valve includes autoclavable.
    Examples of such materials are silicone rubber, stainless steel, etc. The choice of these materials enables the use of the valve in medical equipment such as a respirator. Thus, valves contaminated by the patient can be cleaned and disinfected between different patients.
    In some embodiments, the fluid control exhalation valve comprises that the fluid control exhalation valve be of disposable material.
    As an alternative to an autoclavable valve, it can be made of disposable material that is discarded after use.
    In some embodiments, the fluid control exhalation valve includes at least two ultrasonic transceivers located along the flow channel.
    A compact unit can thus be provided. The unit provides an advantageous fast control of the flow through the fluid controlling exhalation valve as the distance between the flow meter and the valve can be kept short and turbulence is avoided.
    Another advantageous embodiment of the fluid control exhalation valve comprises that the rotationally symmetrical body, located in the flow channel, is streamlined.
    This construction helps to avoid turbulence in the flow channel.
    In a second aspect, the invention includes a method of controlling gas from a respiratory system connected to a patient on exhalation. The method comprises providing a fluid controlled exhalation valve with at least one fluid-filled element comprising at least one flexible wall interconnected by a mechanical interface, and actuating an actuator which exerts a pushing or pulling movement through the mechanical interface on the fluid-filled element whose at least one flexible wall expands or contracts transversely with respect to the flow direction and presses against or is drawn away from a rotationally symmetrical body, the gas flow in a gas channel of the respiratory system being controlled.
    The advantages of this method are, as for the equipment described above, to be able to control a fluid flow with a small and light valve with little or no turbulence. And that the actuator can be isolated from the flow channel, which facilitates cleaning, destruction or recycling because the actuator unit can be kept uncontaminated. General Description of the Drawings These and other aspects, features and advantages of the invention are at least in part clarified and specified by the following description of embodiments of the present invention, taken in conjunction with the accompanying figures, in which Figure 1 shows in a schematic view an embodiment in an axial cross section of a pipe joint; Figure 2 shows in a schematic view the pipe joint according to figure 1 fitted between two pipe sections; Figure 3 shows in schematic view an embodiment where the device according to figure 2 is docked in a chassis; and Figure 4 shows in schematic view an exemplary embodiment of an exemplary embodiment with the same basic design as in Figure 2, with a flow meter in the form of two ultrasonic transceiver elements. Description of embodiments Figure 1 shows in a schematic view an exemplary embodiment in an axial cross section of a pipe joint. The abutment ring 10 consists of a rotationally symmetrical body with air equalization holes 13 and lacquer holes 14. The flexible bellows 11 has a rotationally symmetrical surface 15 towards the flow channel. In the compressed state, the bellows is formed by the dashed line 12, the circular bulge 16 of which acts as a soft valve element. An area of the bellows 17 thanks the air equalization hole 13 and together with it forms an uncompressed form of the valve device (NO). check valve. normally open Figure 2 shows in a schematic view the pipe joint according to figure 1 fitted between two pipes 20 and 21. In the center of the outlet pipe 21 is a streamlined, rotationally symmetrical body 23 suspended in the struts 24. The bellows is mounted against the pipe 20 fixed by the retaining ring 10.
    The retaining ring 10 has a lug 26 which holds the retaining ring 10 in place in the groove 22 on the inlet pipe 20. The movable ring 25 serves as a piston against the bellows 11.
    Figure 3 shows in schematic view an embodiment where the device according to figure 2 is docked in a chassis 31 with the docking fasteners 32 and 33. On the chassis 31 there is via an spacer plate 34 an actuator unit 30, the output movement of which via the strut 35 points towards the movable ring 25.
    Figure 4 shows in schematic view an exemplary embodiment with the same basic embodiment as in Figure 2, but the ultrasonic transceiver elements 40 and 41 have been added.
    The ultrasonic transceiver element 40 is located in a body 42 anchored with the struts 43 to the inlet pipe of the device.
    In the embodiment according to Figure 1, an annular bellows 11 is provided with a surface, directed towards the flow channel, which is brought into compression. A detailed view of the cross-sectional geometry of the bellows 11 is shown in Figure 1. As the bellows is compressed, it is pressed against the abutment ring 10 and will bulge out towards the flow channel, as illustrated by the bulged surface 16. Since ambient temperatures and atmospheric pressure affect the volume of the bellows, especially in idle mode, a channel 14 with a slight leakage has been supplied. The duct may be filled with a highly porous material such as GoreTex®. The task of the duct is to very slowly release gas with a higher pressure than the atmospheric pressure in the bellows. Since this leakage in combination with a working valve will eventually lead to the bellows not being filled in the rest position, a non-return valve function has been added which is realized by a hole 13 in the retaining ring and an area 17 on the bellows. When the actuator goes to sleep, air will fill the bellows via this path. Alternatively, the bellows can be filled and then the non-return valve 13, 17 is not needed or the bellows can in this case be completely with a gel, the air equalization hole 14. closed around the gel. With a securely closed bellows, the gel can also be replaced by a liquid.
    An advantageous embodiment of the invention illustrated in Figure 3 is a device which can be easily lifted out of the chassis of the apparatus in which it is intended to sit, a respirator. for example This can be done without opening the patient's hose system for exhalation, and thus keeping the chassis uncontaminated. The hose system can then be moved for cleaning, destruction or recycling.
    When the device according to Figure 3 is lifted off, only the parts 32, 33, 34, 30 and 35 remain in the chassis part 31. parts belong to a part of the device, These actuator part. The other parts belong to the valve part.
    After the valve part is lifted out, the patient hoses can be removed from the end pieces 20 and 21, the valve part of the device contains parts that can be separated and autoclaved.
    The inlet part of the valve part consists of a first This part consists of an end piece in hard material, e.g. end piece 20, plastic. the retaining ring 10 and the bellows 11.
    The outlet part of the valve consists of the outlet pipe 20 with the rotationally symmetrical body 23 attached to the struts 24 and the movable ring 25. The actuator part 30 has a strut 35 which when applying the valve part in the chassis presses against the guide ring 25 according to figure 3. Docking brackets 32 and 33 and the spacer plate 34 pours the valve member into place.
    The actuator part 30 preferably consists of two piezoelectric actuators with mechanical amplifiers located on each side of the outlet tube 21.
    The device can also be supplemented with ultrasonic transceivers 40 and 41 according to Figure 4, in order to use them to measure the gas flow according to the Doppler principle.
    In the open position, the valve has a very low flow resistance.
    The valve can thus be operated with fast response, high accuracy and low energy consumption.
    权利要求:
    Claims (1)
    [1]
    A patent-controlled exhalation valve for controlling gas from a respiratory system when connected to a patient on exhalation, which comprises: - a gas duct for exhaled gas with at least two pipe sections (20, 21); - at least one fluid-filled element with at least one flexible wall (15) coinciding with the inner wall of the pipes forming the gas channel between two of said pipe sections; - at least one, along the flow direction, rotationally symmetrical body (23) which is at least partially arranged opposite the flexible wall (15) in the gas duct; and wherein a mechanical interface comprising at least one actuator unit is arranged to transmit a pushing or pulling movement on the fluid-filled element whose flexible wall then expands or contracts transversely with respect to the flow direction and presses against or is drawn away from the rotationally symmetrical body. can be controlled. The exhalation valve according to claim 1, wherein the fluid controlling exhalation valve is configured to be docked with a carrier having at least one actuator unit arranged to be connected to the mechanical interface. The exhalation valve according to claim 1, wherein at least one actuator unit is in direct connection with the mechanical interface. The exhalation valve of claim 1, wherein a leakage channel is located from the fluid in the at least one fluid-filled element to the ambient air. The exhalation valve according to claim 4, wherein a non-return valve acting in the direction of the fluid is located between the fluid in the fluid-filled element and the ambient air. The exhalation valve according to claims 1-4, wherein the fluid in the fluid-filled element is a gel. The exhalation valve according to claims 1-4, wherein the fluid in the fluid-filled element is a liquid. The expiration valve according to claims 1-7, wherein the at least one actuator unit consists of at least one piezo actuator. The exhalation valve of claim 8, wherein the at least one piezo actuator is in series with a mechanical motion amplifier. The expiratory valve according to claims 1-9, wherein the expiratory valve is autoclavable, or wherein the fluid-controlling expiratory valve consists at least in part of disposable material. The exhalation valve of claims 1-10, further comprising at least two ultrasonic transverses located along the flow channel. The exhalation valve according to claims 1-11, comprising that the rotationally symmetrical body, located in the river channel, is streamlined. A method of controlling gas from a breathing system coupled to a patient on exhalation, comprising providing a fluid controlled exhalation valve having at least one fluid-filled element comprising at least one flexible cradle connected to a mechanical interface, and actuating an actuator which through the mechanical interface exerts a pressing or pulling movement on the fluid-filled element whose at least one flexible cradle expands or contracts transversely with respect to the flow direction and presses against or is drawn away from a rotationally symmetrical body, the gas flow in a gas channel of the respiratory system being controlled.
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    同族专利:
    公开号 | 公开日
    SE535493C2|2012-08-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1050490A|SE535493C2|2010-05-17|2010-05-17|Exhalation valve and method for exhalation valve control|SE1050490A| SE535493C2|2010-05-17|2010-05-17|Exhalation valve and method for exhalation valve control|
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