CN207734452U - A kind of implantable drug delivery system - Google Patents

Abstract

An implantable drug delivery device, including a catheter and a pump body. The pump body is composed of a gland, a base, an extension, and a puncture membrane. There are steps on the inner wall of the base, and a puncture membrane is covered on the steps. The medicine cavity, the gland is embedded between the open end of the base and the puncture membrane, the rear end of the base extends outwards to form an extension section, and a passage leading to the medicine cavity is provided in the extension section, and the pump body also includes a The steel pipe and threaded fixing cap of the steel pipe fixing seat, the steel pipe runs through the central axis of the steel pipe fixing seat, terminates at the bottom end of the steel pipe fixing seat and hooks on the bottom end of the steel pipe fixing seat in a bell-shaped shape, forming a through passage, and the threaded fixing The cap is composed of a hollow locking cap with external threads and a seal, and the seal is firmly embedded in the locking cap through extrusion welding; the beneficial effects of the utility model are: relatively low cost, safe material selection, and good sealing effect , Reduce the phenomenon of leakage, fixed firmly, not easy to fall off.

Description

An implantable drug delivery device

technical field

The utility model relates to the technical field of medical medical instruments, in particular to an implanted drug delivery device.

Background technique

The implantable pump is an intrathecal infusion device completely implanted in the body, used for local perfusion of drugs or delivering nutrients, mainly composed of a pump body for puncture and an intrathecal catheter. In the sheath of the human body, other parts of the catheter and the pump body are embedded in the subcutaneous tissue. During treatment, a non-invasive needle can be punctured vertically into the pump body according to the position of the implanted pump. Second, long-term, repeated infusion of drugs, so that the infusion of drugs directly into the sheath, reduce the amount of medication, reduce side effects, and enhance the efficacy of drug therapy. The use of implanted pumps can avoid infection caused by conventional intubation and contact with the outside world. vascular sclerosis and necrosis caused by venous puncture, and does not affect the daily activities of patients; however, the implanted pumps commonly used in clinical practice still have the following disadvantages: 1. Insufficient manufacturing process and material selection make the implanted pump leak during use; 2. The steel needle is directly inserted into the drug cavity and fixed with glue, which is a complicated operation process; 3. The catheter is connected to the steel needle with a socket, and external parts are used to fix it, so the structure is complicated; 4. Due to the complex structure of the currently used implanted pump, there are many production processes, which increase the cost and increase the cost of the patient.

Utility model content

In order to avoid the above disadvantages, the purpose of this utility model is to provide an implantable drug delivery device, the steel needle is connected to the drug chamber, and the steel needle is connected to the catheter using a new process, so that it is fixed firmly, simple in structure, and easier to operate. convenient.

The measures taken by the utility model for solving its technical problems are:

An implantable drug delivery device, including a catheter and a pump body. The pump body is composed of a gland, a base, an extension, and a puncture membrane. There are steps on the inner wall of the base, and a puncture membrane is covered on the steps. The medicine cavity, the gland is embedded between the open end of the base and the puncture membrane, the rear end of the base extends outwards to form an extension section, and a passage leading to the medicine cavity is provided in the extension section, and the pump body also includes a The steel pipe and the threaded fixing cap of the steel pipe fixing seat, the steel pipe runs through the central axis of the steel pipe fixing seat, terminates at the bottom of the steel pipe fixing seat and hooks at the bottom of the steel pipe fixing seat in a bell-shaped shape, forming a through channel, this process can reduce the fixing The steel pipe is glued and fixed, and the threaded fixing cap is composed of a hollow locking cap with external threads and a seal, and the seal is firmly embedded in the locking cap through extrusion welding.

The aforementioned implantable drug delivery device is characterized in that the central axis of the sealing member has an aperture through which a catheter can pass, the head end of the sealing member is bullet-shaped and the tail end is funnel-shaped.

The aforementioned implantable drug delivery device is characterized in that after the steel pipe with the steel pipe fixing seat is assembled with the pump body, the medicine chamber and the steel pipe form a liquid channel.

The aforementioned implantable drug delivery device is characterized in that the gland is welded to the base.

The aforementioned implantable drug delivery device is characterized in that the steel pipe is made of stainless steel, the puncture membrane is made of silica gel, the seal and catheter are made of polyurethane, and the rest of the accessories are made of polysulfone.

The beneficial effects of an implantable drug delivery device of the utility model are:

1. Simple structure and convenient operation;

2. The cost is relatively low, and the material selection is safe and reliable;

3. Good sealing effect, reducing the occurrence of leakage;

4. Firmly fixed, not easy to fall off.

Description of drawings

Fig. 1 is the overall structural representation of the utility model

Fig. 2 is the schematic sectional view of the utility model pump body

Fig. 3 is the schematic diagram of the steel pipe with the steel pipe fixing seat of the utility model

Fig. 4 is the cross-sectional schematic view of the utility model threaded fixing cap

Detailed ways

An implantable drug delivery device, including a catheter 1 and a pump body 2. The pump body 2 is composed of a gland 3, a base 4, an extension section 5, and a puncture membrane 6. The inner wall of the base 4 is provided with a step, and the step is covered with a puncture membrane. 6. The gland 3 is embedded between the open end of the base 4 and the puncture membrane 6, a medicine cavity 7 is formed between the puncture membrane 6 and the base 4, and the rear end of the base 4 extends outward to form an extension section 5, which is provided with The channel is characterized in that the implantable drug delivery device also includes a steel pipe 9 with a steel pipe fixing seat 8 and a threaded fixing cap 10, the steel pipe 3 runs through the central axis of the steel pipe fixing seat 8 and terminates at the bottom end of the steel pipe fixing seat 8 to form A through channel, the threaded fixing cap 10 is composed of a hollow locking cap 11 with external threads and a sealing member 12, the sealing member 12 is firmly embedded in the locking cap 11 by extrusion welding, the center of the sealing member 12 The shaft has an aperture that can pass through the conduit 1. The head end of the seal 12 is bullet-shaped and the tail end is funnel-shaped. The steel pipe 9 with the steel pipe holder 8 and the pump body 2 After assembly, the drug cavity 7 and the steel pipe 9 form a liquid channel, the gland 3 is welded to the base 4, the steel pipe 9 is made of stainless steel, the puncture membrane 6 is made of silica gel, the seal 12 and the conduit 1 are made of polyurethane, and the rest The accessories are made of polysulfone.

During the specific clinical operation, the catheter 1 is inserted into the subcutaneous tunnel to the embedding position of the pump body 2, the catheter 1 passes through the aperture in the threaded fixing cap 10 and is socketed on the steel pipe 9, and the threaded fixing cap 10 is connected to the extension by using a special wrench. The open end of the section 5 is connected by threads. When the threaded fixing cap 5 is rotated to a certain degree, the head end of the sealing member 12 squeezes the steel pipe fixing seat 8 to achieve the fixing effect and play a sealing role at the same time. When the medicine needs to be injected, the needle Piercing the puncture membrane 6 through the skin and entering the medicine cavity 7 to inject the medicine solution, the medicine solution flows through the steel tube 9 and flows through the catheter 1 to the infusion position.

The above are the preferred embodiments of the utility model, and any changes made according to the technical solution of the utility model, when the functional effect produced does not exceed the scope of the technical solution of the utility model, all belong to the protection of the utility model.

Claims (5)

1. An implantable drug delivery device, comprising a catheter and a pump body, the pump body is composed of a gland, a base, an extension, and a puncture membrane, the inner wall of the base is provided with steps, the steps are covered with a puncture membrane, and the gap between the puncture membrane and the base is A drug cavity is formed between the base, the gland is embedded between the open end of the base and the puncture membrane, the rear end of the base extends outwards to form an extension section, and a passage leading to the drug cavity is provided in the extension section, and the feature is that: the pump body also It includes a steel pipe with a steel pipe fixing seat and a threaded fixing cap. The steel pipe runs through the central axis of the steel pipe fixing seat, terminates at the bottom end of the steel pipe fixing seat, and is hooked on the bottom end of the steel pipe fixing seat in a bell-shaped shape to form a through passage. The threaded fixing cap is composed of a hollow locking cap with external threads and a seal, and the seal is firmly embedded in the locking cap by extrusion welding. 2. An implantable drug delivery device according to claim 1, characterized in that: the central axis of the sealing member has an aperture through which the catheter can pass, and the head end of the sealing member is bullet-shaped and fits with the steel pipe fixing seat, The tail is funnel-shaped. 3. An implantable drug delivery device according to claim 1, characterized in that: after the steel pipe with the steel pipe fixing seat is assembled with the pump body, the medicine chamber and the steel pipe form a liquid channel. 4. An implantable drug delivery device according to claim 1, characterized in that the gland is welded to the base. 5. An implantable drug delivery device according to claim 1, characterized in that: the steel pipe is made of stainless steel, the puncture membrane is made of silica gel, the seal and catheter are made of polyurethane, and the rest of the accessories are made of polysulfone.