• 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:
    A method is disclosed for controlling the dispensing of fluid from a source at a hydrostatic pressure involving the sequential measuring and dispensing of predetermined volumetric increments of fluid from the source of fluid during different ones of a series of time intervals. Apparatus is also provided for controlling the dispensing of fluid, including metering means for receiving a predetermined increment of fluid and for emptying the predetermined increment of fluid, conduit means for delivering fluid from a source of fluid to the metering means, and control means for actuating the metering means between a condition for receiving one predetermined increment of fluid and a condition for emptying the predetermined increment of fluid.
    公开号:SU1087053A3
    申请号:SU772535448
    申请日:1977-10-14
    公开日:1984-04-15
    发明作者:Скотт Тернер Роджер；Роджер Тернер Чарльз
    申请人:Роджер Скотт Тернер, Чарльз Роджер Тернер (США)；
    IPC主号:
    专利说明:

    The invention relates to a medical technique, namely to control devices for administering a liquid medicament to a patient. A device for intravenous fluid injection is known, comprising a container for transfusing a liquid, a metering mechanism, and a control unit P. However, the known device does not exclude the possibility of air getting into the vein, which can cause a gas embolism with severe consequences for the patient. The aim of the invention is the elimination of gas embolus. The goal is achieved by the fact that an intravenous fluid infusion device containing a container for a transfusion liquid, a dosing mechanism and a control unit, is provided with a means of interaction between a control unit and a dosing mechanism, the dosing mechanism is installed in the control unit and consists of a dosing chamber through which it passes fluid for infusion, and two valves, one of which is located in front of the dosing chamber and the other behind the dosing chamber, while the dosing chamber and the valves have an elastic partition, and The control unit and metering mechanism interaction means consists of a fixing element, a timer, two plungers and an electromechanical transducer for alternately pressing the elastic partition on the valves. The locking element is designed as a slider carriage. In this case, the control unit has a sensor controlling the presence of a predetermined volume of liquid in the dosing chamber. In FIG. 1 shows a device for intravenous fluid infusion. A general view of FIG. 2 - control unit, general view; in fig. 3 — means of interaction between the control unit and the metering mechanism. The device for intravenous infusion of fluid contains a container 1 for transfusion of fluid, a dosing mechanism 2 and a control unit 3, the device being provided with a means for interaction of the control unit 3 and a dosing mechanism 2 consisting of a fixing element made in the form of a carriage 4 with slots A of timer 5, two plungers 6 and 7 and an electromechanical transducer 8, the metering mechanism 2 being installed in the control unit and consisting of a metering chamber 9 through which the infusion fluid passes and two valves 10 and 11, one of which is located in front of the dosing chamber 9 and the other behind the dosing chamber 9. The dosing chamber 9 and valves 10 and 11 have an elastic partition 12, and the control unit 3 has a sensor 13 for monitoring the presence of a given volume of liquid in the dosing chamber 9 and the electromechanical converter 8 serves to alternately press the elastic partition 12 against the valves 10 and 11. The control unit 3 has a button 14 for locking the valves 10 and 11 in the open state when the device is ready for operation. The device works as follows. The container 1 with the fluid to be administered is suspended upside down with the dosing mechanism 2 attached to it over the patient so that the liquid flows through the dosing chamber 9 under the force of gravity and flows out of the dosing chamber 9 completely during each release period, while the dosing the mechanism 2 is placed at a height of 75 cm and higher above the patient so as to ensure a significant difference between the pressure of the fluid in the dosing chamber 9 and the reverse venous pressure, which allows the dosing chamber 9 to be completely empty With this orientation of the vessel 1 and the metering mechanism 2, the liquid flows into the metering mechanism 2, which is connected to the control unit 3, through the discharge valve 10, fills the metering chamber 9, moving the elastic partition with fluid pressure on it. The liquid exits the metering chamber 9 through the discharge valve 11. The control unit 3 is connected to the metering mechanism 2 by placing the metering mechanism 2 in slot A of the carriage 4. The carriage 4 is moved to the working position so that the plungers 6 and 7 can be rt / open and to close the inlet and outlet valves 10 and 11 of the metering mechanism 2 at the moment of the operation of the electromechanical transducer 8, when the sensor 13 of the control is brought into operation. By pressing the button 14, valves 10 and 11 are opened and the liquid fills all the containers and tubes of the metering mechanism 2, and the air is completely forced out. Thereafter, a tube (not shown) is attached to the device, to which the hypodermic needle is connected and the last needle is inserted into the patient’s vascular system. The device is adjusted to a predetermined flow rate using a timer 5 on a scale on the body of control unit 3, determining the level of injection of each volumetric amount of liquid contained in the dispensing chamber 9. Timer 5 changes the time interval during which output valve 11 remains open for release a predetermined amount of liquid from the dosing chamber 9. The start of the introduction begins by switching on the control unit 3. By activating the circuit of timer 5, an electromechanical transducer 8 is prepared for operation, controlling the operation of valves 10 and 11 for filling and emptying chamber 9 during one cycle of operation of the device. During each cycle, the inlet valve 10 opens to fill the dosing chamber 9, after 1 534, the inlet valve 10 of the plunger 6 is closed, and the plunger 7 is removed by the electromechanical converter 8, the valve 11 is opened and the fluid flows under the force of gravity from the dosing chamber 9 to the patient before the start of the next cycle. The end of the dose infusion is accompanied by the removal of the hypodermic needle from the patient immediately after the end of the infusion of the required amount of fluid, while the fluid continues to flow into the needle, and the volume of fluid passing through the dosing chamber 9 will automatically decrease. The fluid level at which a change in the volumetric amount of fluid in the dosing chamber 9 occurs after a given dose has been entered depends on the degree of viscosity of the fluid. At the same time, the device also operates with a reduced level of fluid injection, which protects the patient and provides sufficient time to remove the hypodermic needle without complications in the patient. i The proposed device provides for the elimination of gas embolism due to the infusion of a liquid only under the action of gravity, it allows to carry out an accurate dosage of intravenous infusion of a liquid over a wide range.
    Lg
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    Cpu8.i
    权利要求:
    Claims (3)
    [1]
    1. DEVICE FOR INTRAVENOUS FLUID INFusion, containing a container for transfused liquid, a metering mechanism and a control unit, characterized in that, in order to eliminate gas embolism, it is equipped with a means of interaction between the control unit and the metering mechanism, the metering mechanism is installed in the control unit and consists of the metering chamber through which the infusion fluid passes, and two valves, one of which is located in front of the metering chamber and the other behind the metering chamber, while the metering chamber and valve us have elastic partition, with the interaction means of the control unit and the metering device consists of a locking element, a timer and two plungers electromechanical transducer DLN alternately pressing the elastic septum in valves.
    [2]
    2. The device according to claim 1, characterized in that the fixing element is made in the form of a carriage with $ slots.
    [3]
    3. The device according to claim 1, wherein the control unit has a sensor for monitoring the presence of a given volume of liquid in the metering chamber.
    SU „,, 1087053
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1087053A3|1984-04-15|Device for intravenous injections of liquid
    US4191184A|1980-03-04|Intravenous infusion regulation system with reciprocal metering means
    US4261356A|1981-04-14|Method and apparatus for controlling the dispensing of fluid
    US5200090A|1993-04-06|Multiple fluid source isolation, metering and alarm system and method
    US5188603A|1993-02-23|Fluid infusion delivery system
    US5098377A|1992-03-24|Multimodal displacement pump and dissolution system for same
    US4867743A|1989-09-19|Ambulatory disposable infusion delivery system
    US4332246A|1982-06-01|Positive displacement intravenous infusion pump device and method
    US7540958B2|2009-06-02|Device for controlling blood circulation for a single needle circuit
    US20040044332A1|2004-03-04|Implantable medical device for delivering a liquid
    EP2651468B1|2015-01-21|Improved large-volume bolus patient controlled drug administration device
    US4834705A|1989-05-30|Drug dispensing system
    US5544519A|1996-08-13|Method and apparatus for measuring the flow resistance of a catheter in an implanted medication infusion system
    EP0704224B1|2002-02-27|Method of monitoring fluid flow
    EP3055002B1|2021-01-13|Large-volume bolus patient controlled drug administration device with lock-out
    US4333454A|1982-06-08|Automatic tubular feeding apparatus and method
    US4266697A|1981-05-12|Controlled volume liquid meter defining improved plunger means
    RU2252788C1|2005-05-27|Device for carrying out membrane-type plasmapheresis in single-needle mode
    US3204633A|1965-09-07|Volumetric automatic shut-off fluid valve for infusion apparatus
    US5938638A|1999-08-17|Device for the controlled injection of a programmable quantity of liquid
    US5993657A|1999-11-30|Adjustable collection canister for continuous renal replacement therapy
    EP1722837B1|2008-04-30|Single needle device for extracorporeal treatment of blood
    SU1128958A1|1984-12-15|Apparatus for lymphography
    EP0094998A1|1983-11-30|Positive displacement intravenous infusion pump device and method
    CA1144444A|1983-04-12|Device for the intravenous or enteric infusion ofliquids into the human body at a predeterminedconstant rate
    同族专利:
    公开号 | 公开日
    GB1594217A|1981-07-30|
    AU515033B2|1981-03-12|
    BE859723A|1978-04-14|
    DE2746374A1|1978-04-20|
    ES463243A1|1978-11-01|
    FR2367503A1|1978-05-12|
    JPS5349886A|1978-05-06|
    SE8300941L|1983-02-21|
    SE8300941D0|1983-02-21|
    IT1143709B|1986-10-22|
    SE427421B|1983-04-11|
    FR2367503B1|1984-12-21|
    CA1108957A|1981-09-15|
    US4121584A|1978-10-24|
    SE7711610L|1978-04-16|
    AU2968677A|1979-04-26|
    ZA776133B|1978-06-28|
    IL53134A|1980-01-31|
    ES472564A1|1979-02-16|
    GB1594218A|1981-07-30|
    BR7706897A|1978-07-18|
    IL53134D0|1977-12-30|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/732,946|US4121584A|1976-10-15|1976-10-15|Method and apparatus for controlling the dispensing of fluid|
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