RU27786U1 - IMPLANTED SYSTEM FOR DOSED INFUSION - Google Patents

Description

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IMPLANTED SYSTEM FOR DOSED IIUFUSIA

The utility model relates to medical equipment, in particular, to implantable systems for prolonged dosed administration of drugs, that is, for dosed infusion, into the patient's body in the treatment of various diseases.

This is especially important in the treatment of patients suffering from continuous pain, for example, terminally ill patients who need a constant amount of painkillers administered to reduce the pain effect.

Previously, for the dosed administration of drugs, patients were offered systems containing pumps that regulate the supply of drugs, driven by an energy source. Typically, such systems are subcutaneously mounted on the body and, using a connected catheter, the drug is delivered to the desired location. However, such systems are very expensive and use a power source, in the event of failure of which the system must be replaced.

Closest to the proposed technical solution is a system for dosed administration of drugs containing a reservoir for storing a dosed liquid, connected by a pipe for supplying a liquid with a manually driven pump for moving the liquid from the storage tank to the outlet catheter through a discharge pipe containing a device for activating a liquid crossover (US No. 5085644 )

When using such systems, the pump is installed subcutaneously and is actuated by the patient to supply the drug, when there is a need for such a drug.

Pressure chambers in such systems are designed in such a way that they spontaneously occupy the position of maximum volume, and when exposed to a patient, they are reduced to a minimum volume. In this case, the repeated flow of liquid into the chamber is controlled by means of a capillary so that the pump can supply liquid after a certain period of time.

The disadvantage of such systems is that the flow of drugs to the patient will decrease due to the outflow of fluid into the fluid storage tank when the pump is pressed.

The objective of this utility model is to create a reliable and simple implantable system that delivers the full required dose of the drug.

Achievement of technical results - simplicity and reliability of the device, as well as ensuring the guaranteed administration of a dose of medication prescribed to the patient, is carried out due to the fact that the implantable system containing a reservoir for storing the dosing fluid, connected by a fluid supply pipe to a manually driven fluid transfer pump from the storage tank to the outlet catheter through the measured dose tap containing the device for activating the movement of the liquid, including us sa proposed design. The pump contains a housing in which the discharge and metering chambers are located, separated by a rigid partition with holes at the edges and with a flexible membrane located centrally on the side of the discharge chamber, overlapping the holes in the partition. This design is quite nostril and discourages reliable operation and the absence of reverse drug flow, that is, the receipt of a full measured dose of the drug to the patient.

The system is made of special grades of silicone rubber and is intended for subcutaneous implantation in order to supply drugs.

Ha FIG. 1 is a schematic representation of a structural embodiment of the system.

In FIG. 2 shows a pump.

The system comprises a drug storage tank 1 connected to an injection unit 3 for filling the drug storage tank 1 by inserting an injection needle. The injection unit 3 is connected through a filter 4 using a channel 2 with a pipe 6 for supplying liquid.

The system also includes a pump 5. The pump 5 is located in the patient’s body so that the patient can control it, and is connected by a fluid supply pipe 6 to the drug storage tank 1. The control of the pump 5 is done by pressing the dome of the discharge chamber.

The pump 5 (see Fig. 2) contains a discharge chamber 7 spontaneously accepting a state of maximum volume (provided by the elastic properties of the structure) Due to the compression of the chamber 7 as a result of the actions of the patient, it decreases under the action of the applied force to deliver contents. The injection chamber 7 is separated by a rigid partition 8 from the metering chamber 9, which is equipped with a limiter-regulator 10 that provides control of the fluid flow. In the central part of the partition, an elastic membrane 11 is rigidly fixed, the membrane 11 is tightly adjacent to the holes 12 of the rigid partition and overlapping the holes 12 in it. A device for activating fluid remixing 13 is integrated in the metering fluid withdrawal pipe, for example, it can be a normally closed valve (in particular, as in US Pat. No. 5,085,644) that opens when the patient presses and allows the liquid drug to enter the outlet catheter 14.

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When the patient is pressed on the pump 5 and the device for activating the non-movement of the liquid 13, the pressure chamber 7 of the pump 5 is compressed, the membrane 11 of which is squeezed from the holes 12 of the septum, providing a one-way fluid flow from the chamber 7 through the valve of the device for activating the movement of the liquid 13 into the outlet catheter 14.

When you press the pump 5 again, provided that there is no effect on the device for activating the movement of fluid 13, that is, the outlet to the output catheter 14 is blocked by a normally closed valve, the injection chamber 7 is re-filled with medicine due to the elastic properties of its walls.

The system is implanted subcutaneously, and the injection unit 3 is located in a convenient place for injection on the body, and the pump 5 and the device for activating the movement of fluid 13 are located where they are accessible to the patient.

The outlet catheter 14 is located in the corresponding part of the body, depending on the purpose of the system. The dimensions of the device are such that it can be installed in the body through a small incision.

After the system is installed, the reservoir 1 for storing drugs is filled through the injection node 3 with the drug. Then, to actuate the system, the patient controls the pump 5 by repeatedly squeezing the chamber 7, so as to cause the drug to flow from the storage tank 1 into the metering chamber 9 and then through the openings 12 in the rigid partition 8 into the discharge chamber 7. The valve device 13 activating the movement of fluid is closed.

When the discharge chamber 7 reaches its maximum volume, any further patient exposure to the pump 5 does not cause additional supply of medication to the catheter until

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Claims (1)

An implantable system for dosed infusion containing a reservoir for storing a dosed fluid, connected by a fluid supply pipe to a manually driven fluid transfer pump from the storage tank to the outlet catheter through a measured liquid dose withdrawal pipe, wherein the liquid discharge pipe contains a fluid transfer activation device, characterized in that the pump contains a housing in which the discharge and metering chambers are located, separated by a rigid partition with holes on the edges and with a centrally arranged on the part of the pumping chamber flexible membrane closing the hole in the septum.