CN217612295U - A special needle for an implantable drug delivery device - Google Patents

Abstract

The utility model discloses a special needle for an implantable drug delivery device, which comprises a first protective cover, a second protective cover, a third protective cover and a puncture needle. The top of the inner wall of the first protective cover is fixedly connected with a fixing seat. An infusion tube is fixedly connected to the upper end of the puncture needle, and a one-way valve is fixedly installed on the side surface of the infusion tube. The utility model makes the first protective cover, the second protective cover and the third protective cover in a stretched state by rotating the first protective cover and the second protective cover, and when the needle is pulled out, the puncture needle is retracted into the third protective cover, preventing the The medical staff will cause stab wounds when pulling the needle, avoid the puncture needle contacting different blood and cause infection, and fix it with the human skin through the hydrocolloid fixed applicator. The fixed area is large and will not come off. When the skin is allergic, the acupuncture site is isolated from the outside world through the third protective cover to prevent the puncture site from being exposed to the air and causing infection.

Description

A special needle for an implantable drug delivery device

technical field

The utility model relates to the technical field of medical devices, in particular to a special needle for an implantable drug delivery device.

Background technique

The infusion port is a closed infusion device that is completely implanted into the human body. It is divided into three parts: a non-invasive needle, a catheter inserted into a vein, and an injection seat (port body) buried under the skin and connected to the infusion needle. The injection seat is connected to a catheter inserted into a large vein to form a long-term vascular access, which plays a similar role as a port, so it is called an "infusion port". Acupuncture is performed on the injection seat by connecting the infusion tube with a non-invasive needle to send the liquid medicine into the human vein.

However, when the needle is pulled out, the medical staff is prone to acupuncture injury. The puncture needle causes the patient's blood to enter the blood of the medical staff through the puncture site, which is easy to spread the disease, and most of the non-damaged needles pass through the medical staff after the acupuncture is completed. The adhesive tape is used to fix the skin, and the fixation effect is not good and the patient is prone to allergies.

Utility model content

The purpose of the present invention is to provide a special needle for an implantable drug delivery device, so as to solve the problems raised in the above-mentioned background art.

In order to achieve the above purpose, the present invention provides the following technical solutions: a special needle for an implantable drug delivery device, comprising a first protective cover, a second protective cover, a third protective cover and a puncture needle, the inner wall of the first protective cover The top is fixedly connected with a fixing seat, the upper end of the puncture needle is fixedly connected with an infusion tube, a one-way valve is fixedly installed on the side surface of the infusion tube, and the first protective cover is movably clamped on the inner wall of the second protective cover, The second protective cover is movably connected to the inner wall of the third protective cover, the lower end of the third protective cover is fixedly connected with a fixed base, the upper surface of the fixed base is fixedly connected with a hydrocolloid fixed applicator, and the third protective cover is fixedly connected with a fixed base. Two locking blocks are fixedly connected to the lower end side surfaces of the first protective cover and the second protective cover.

As a preferred solution of the present invention, the inner walls of the second protective cover and the third protective cover are respectively provided with two movable grooves, and the locking blocks are movably connected to the inner walls of the movable grooves.

As a preferred solution of the present invention, limit slots are respectively set at both ends of the movable slot, and the outer diameter of the locking block is adapted to the inner diameter of the limit slot, and the movable slot and the limit slot are connected.

As a preferred solution of the present invention, the upper end of the puncture needle is fixed through the fixing seat and the first protective cover and extends above the first protective cover, the lower end of the puncture needle is a pointed structure, and the puncture needle Made of medical grade stainless steel.

As a preferred solution of the present invention, the outer diameter of the first protective cover is matched with the inner diameter of the second protective cover, and the outer diameter of the second protective cover is compatible with the inner diameter of the third protective cover. The first protective cover, the second protective cover and the third protective cover are all made of PET medical grade plastic, and the fixed base is made of medical grade silicone material.

As a preferred solution of the present invention, the lower surface of the hydrocolloid fixed application is bonded with a hydrocolloid application release paper, and the diameter of the outer ring of the hydrocolloid fixed application is four times the diameter of the outer ring of the fixed base , the diameter of the outer ring of the fixed base is twice the inner diameter of the third protective cover, and the diameter of the outer ring of the fixed base is 2.5 times the diameter of the infusion port body.

Compared with the prior art, the beneficial effects of the present utility model are:

1. In the present invention, the first protective cover, the second protective cover and the third protective cover are in a stretched state by rotating the first protective cover and the second protective cover in turn, and the puncture needle is retracted into the third protective cover when the needle is pulled out. In order to prevent the puncture caused by medical staff when pulling the needle, avoid the infection caused by the puncture needle contacting different blood, and fix it with the human skin through the hydrocolloid fixed applicator, the fixed area is large and will not come off, and the hydrocolloid fixed applicator is nutritious , to avoid skin allergies during use, and the acupuncture site is isolated from the outside world through the third protective cover to prevent the puncture site from being exposed to the air and causing infection;

2. At the same time, the utility model also fixes the puncture needle through the fixing seat. The fixing seat improves the stability of the connection between the upper end of the puncture needle and the first protective cover, prevents the puncture needle from skewing during acupuncture, and avoids acupuncture. Inaccurate, a one-way valve is installed on the side surface of the infusion tube, so that the liquid medicine can enter the patient's vein in one direction, preventing blood from flowing back.

Description of drawings

Fig. 1 is a front sectional view of a special needle for an implantable drug delivery device of the present invention;

2 is a schematic structural diagram of a special needle movable groove and a limit groove for an implantable drug delivery device of the present invention;

3 is a top view of a special needle for an implantable drug delivery device of the present invention;

Figure 4 is a schematic structural diagram of a special needle locking block for an implantable drug delivery device of the present invention.

In the figure: 1. The first protective cover; 2. The second protective cover; 3. The third protective cover; 4. The fixed base; 5. The hydrocolloid fixed applicator; 6. The puncture needle; Tube; 9. One-way valve; 10. Active groove; 11. Locking block; 12. Limit groove; 13. Hydrocolloid applied release paper.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

1-4, the present invention provides a technical solution: a special needle for an implantable drug delivery device, comprising a first protective cover 1, a second protective cover 2, a third protective cover 3 and a puncture needle 6. A fixed seat 7 is fixedly installed on the top of the inner wall of the protective cover 1. The fixed seat 7 improves the stability of the connection between the puncture needle 6 and the first protective cover 1, and prevents the lower end of the puncture needle 6 from shaking during acupuncture. An infusion tube 8 is fixedly installed on the upper end, and a check valve 9 is fixedly installed on the side surface of the infusion tube 8. The check valve 9 can be selected as a medical check valve or a medical silica gel check valve, and its function is to prevent blood backflow during administration. In this case, the first protective cover 1 is movably clamped to the inner wall of the second protective cover 2, the second protective cover 2 is movably connected to the inner wall of the third protective cover 3, and the lower end of the third protective cover 3 is fixedly installed with a fixed base 4, The upper surface of the fixed base 4 is fixedly installed with a hydrocolloid fixed applicator 5. The hydrocolloid fixed applicator 5 can be used to bond and fix the fixed base 4 and the human skin, and then fix the puncture needle 6, the first protective cover 1 and the second protective cover 5. Two locking blocks 11 are fixedly installed on the lower end side surface of the protective cover 2 .

Specifically, the inner walls of the second protective cover 2 and the third protective cover 3 are respectively provided with two movable grooves 10 , and the locking block 11 is movably connected to the inner wall of the movable groove 10 and slides in the movable groove 10 through the locking block 11 The first protective cover 1 , the second protective cover 2 and the third protective cover 3 can be locked with each other while sliding up and down with each other to prevent them from being separated from each other.

Specifically, the two ends of the movable slot 10 are respectively provided with a limiting slot 12, and the outer diameter of the locking block 11 is adapted to the inner diameter of the limiting slot 12, and the movable slot 10 and the limiting slot 12 are connected. The locking block 11 slides into the limiting groove 12 to prevent the locking block 11 from continuing to slide up and down, thereby fixing the relative positions of the first protective cover 1 , the second protective cover 2 and the third protective cover 3 to prevent the puncture needle 6 from detaching Infusion port.

Specifically, the upper end of the puncture needle 6 is fixed through the fixing seat 7 and the first protective cover 1 and extends to the top of the first protective cover 1 , and the liquid medicine is supplied to the puncture needle 6 through the upper infusion tube 8 , and the lower end of the puncture needle 6 The puncture needle 6 is made of medical grade stainless steel material, which conforms to medical standards and has the characteristics of safety and non-toxicity.

Specifically, the outer diameter of the first protective cover 1 matches the inner diameter of the second protective cover 2, and the outer diameter of the second protective cover 2 matches the inner diameter of the third protective cover 3, which is convenient for the first protective cover 1. The second protective cover 2 and the third protective cover 3 slide up and down each other to facilitate piercing the puncture needle 6 into the human skin. The first protective cover 1, the second protective cover 2 and the third protective cover 3 all pass through the PET medical Made of high-grade plastic, with high safety, the fixed base 4 is made of medical-grade silicone material, which has elasticity and can closely fit the surface of human skin.

Specifically, the lower surface of the hydrocolloid fixed applicator 5 is adhered with a hydrocolloid applicator release paper 13, and the hydrocolloid fixed applicator 5 contains water-based nutrients, which will not cause skin allergy to the patient, so tear off the hydrocolloid applicator. The release paper 13 can bond and fix the hydrocolloid fixed applicator 5 and human skin. The diameter of the outer ring of the hydrocolloid fixed applicator 5 is four times the diameter of the outer ring of the fixed base 4, and the bonding area is large and the fixing effect is good. , the diameter of the outer ring of the fixed base 4 is twice the inner diameter of the third protective cover 3, so that the contact area between the fixed base 4 and the surface of the human body is large, and the supporting effect of the third protective cover 3 is improved. The diameter of the outer ring of the fixed base 4 is The diameter of the infusion port body is 2.5 times the diameter of the infusion port body, and the diameter of the infusion port body is smaller than that of the third protective cover 3, so that the third protective cover 3 can cover the infusion port body inside the third protective cover 3 to prevent the infusion port body from appearing. The sliding condition causes the puncture needle 6 to slip out and shift.

Working principle: When in use, the utility model first compresses the first protective cover 1, the second protective cover 2, and the third protective cover 3 together, and then punctures by placing the fixed base 4 and the puncture needle 6 at the designated position and puncturing. After the puncture is successful, the puncture needle 6 is fixed, and the hydrocolloid application release paper 13 on the lower surface of the hydrocolloid fixed applicator 5 is torn off. , Strong stickiness and firm adhesion, the fixed base 4 fixes the port body part within the range of the base to prevent the puncture needle 6 from slipping and shifting. The medicinal liquid is introduced into the patient's vein, and the one-way valve 9 on the side surface of the infusion tube 8 enables the medicinal liquid to enter the patient's vein in one direction, preventing blood from flowing back, ending the treatment, removing the special needle of the infusion device, and opening the hydrocolloid first. Fix the applicator 5, then press the fixing base 4 with one hand, and turn the first protective cover 1 and the second protective cover 2 with the other hand in turn, so that the locking block 11 slides from the limit groove 12 into the movable groove 10 and slides upward. Reversely rotate the first protective cover 1 and the second protective cover 2 to the upper end of the movable groove 10, so that the locking block 11 slides into the limiting groove 12 to be locked again, so that the first protective cover 1, the second protective cover 2 and the The third protective cover 3 is in a stretched state, so that the puncture needle 6 is retracted into the third protective cover 3, and the needle tip at the lower end of the puncture needle 6 is wrapped by the third protective cover 3 to prevent the medical staff from being stabbed when the needle is pulled out. Prevent the puncture needle 6 from contacting with different blood to cause infection.

It should be noted that, in this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. A special needle for an implantable drug delivery device, comprising a first protective cover (1), a second protective cover (2), a third protective cover (3) and a puncture needle (6), characterized in that: the A fixing seat (7) is fixedly connected to the top of the inner wall of a protective cover (1), an infusion tube (8) is fixedly connected to the upper end of the puncture needle (6), and a single unit is fixedly installed on the side surface of the infusion tube (8). To the valve (9), the first protective cover (1) is movably clamped to the inner wall of the second protective cover (2), and the second protective cover (2) is movably connected to the third protective cover (3). The inner wall, the lower end of the third protective cover (3) is fixedly connected with a fixed base (4), the upper surface of the fixed base (4) is fixedly connected with a hydrocolloid fixed applicator (5), the first protective cover (1) and the lower end side surfaces of the second protective cover (2) are fixedly connected with two locking blocks (11). 2. A special needle for an implantable drug delivery device according to claim 1, wherein two movable grooves are respectively opened on the inner walls of the second protective cover (2) and the third protective cover (3). (10), the locking block (11) is movably connected to the inner wall of the movable groove (10). 3. A special needle for an implantable drug delivery device according to claim 2, wherein the two ends of the movable groove (10) are respectively provided with limiting grooves (12), and the locking block (11) The outer diameter of the movable groove (10) is in communication with the inner diameter of the limiting groove (12). 4. A special needle for an implantable drug delivery device according to claim 1, wherein the upper end of the puncture needle (6) is fixed through the fixing seat (7) and the first protective cover (1) and extends to the Above the first protective cover (1), the lower end of the puncture needle (6) has a pointed structure, and the puncture needle (6) is made of medical grade stainless steel. 5. A special needle for an implantable drug delivery device according to claim 1, characterized in that: the outer diameter of the first protective cover (1) is adapted to the inner diameter of the second protective cover (2), The outer diameter of the second protective cover (2) is adapted to the inner diameter of the third protective cover (3), and the first protective cover (1), the second protective cover (2) and the third protective cover ( 3) All are made of PET medical grade plastic, and the fixed base (4) is made of medical grade silicone material. 6. A special needle for an implantable drug delivery device according to claim 1, characterized in that: the lower surface of the hydrocolloid fixed applicator (5) is bonded with a hydrocolloid applicator release paper (13), so The diameter of the outer ring of the hydrocolloid fixed applicator (5) is four times the diameter of the outer ring of the fixed base (4), and the diameter of the outer ring of the fixed base (4) is twice the inner diameter of the third protective cover (3), The diameter of the outer ring of the fixed base (4) is 2.5 times the diameter of the port body of the infusion port.

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