Anti-puncture auxiliary device for infusion port puncture

Abstract

The utility model belongs to the technical field of clinical nursing, and particularly relates to an anti-stabbing auxiliary device for infusion port puncture, which comprises a port body and an injection head, the injection head comprises an outer shell, the outer shell is internally provided with a pressing plate, a support sheet I and a support sheet II from top to bottom, the pressing plate is movably arranged in the outer shell, and the support sheet II is movably arranged in the port body. The first supporting piece and the second supporting piece are respectively fixed in the outer shell, a spring is arranged between the pressing plate and the first supporting piece, and the pressing plate is provided with a non-damage needle used for penetrating into the port body. After the port body and the injection head are in butt joint, the non-damage needle stretches out and penetrates into the port body to conduct infusion connection, and therefore the port body is not damaged. When the injection head is pulled out of the port body, the non-injury needle is firstly retracted into the outer shell of the injection head, and then the injection head and the port body are removed, so that the non-injury needle cannot be exposed outside no matter the non-injury needle is connected or detached, and the risk that medical staff or patients are punctured is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of clinical nursing technology, specifically relating to an anti-puncture auxiliary device for port-a-cath puncture. Background Technology

[0002] An infusion port is a closed infusion device that is completely implanted in the human body. Clinically, it is suitable for patients who need long-term infusion and chemotherapy. With proper maintenance, it can be used for a long time with minimal trauma to the patient and can avoid complications such as phlebitis and arteriosclerosis caused by long-term infusion.

[0003] For example, Chinese Patent Publication No. CN217724249U discloses a butterfly needle for an infusion port, which includes a support ring that engages with the port body. One side of the support ring has an opening. Inside the support ring, from bottom to top, are an antibacterial gel patch and a connecting cap. The antibacterial gel patch is semi-circular in shape and adheres to the inner wall of the support ring. The connecting cap has two rotatably connected connecting pieces that together connect to the top of the support ring for closure. The center of both connecting pieces shares a through hole that mates with the butterfly needle. This device, by incorporating the support ring, allows for convenient positioning on the infusion port for puncture and infusion.

[0004] As described in the prior art of the aforementioned patent, although intravenous infusion can be achieved by puncturing the infusion port, the puncture needle is exposed to the outside when it is pulled out of the infusion port, which can easily cause puncture injuries to personnel and pose a risk of occupational exposure.

[0005] Practical content

[0006] The purpose of this invention is to provide an anti-puncture auxiliary device for port-a-cath insertion. The infusion needle is extended and inserted into the port-a-cath for infusion only after the port-a-cath is aligned with it. When withdrawing the needle, it is first retracted to avoid the risk of puncture injury to personnel.

[0007] The specific technical solution adopted in this utility model is as follows:

[0008] A puncture prevention auxiliary device for port-acuum infusion puncture includes a port body and an injection head. The injection head includes an outer shell. From top to bottom, a pressure plate, a first support plate, and a second support plate are respectively arranged inside the outer shell. The pressure plate is movably disposed inside the outer shell. The first and second support plates are respectively fixed inside the outer shell. A spring is provided between the pressure plate and the first support plate. A non-traumatic needle for puncturing the port body is provided on the pressure plate.

[0009] In a preferred embodiment, the lower end of the outer casing has a flared structure.

[0010] In a preferred embodiment, the lower end of the pressure plate is provided with a hook, the inner side of the support piece is provided with a through hole corresponding to the lower part of the hook, and the inner side of the outer shell is provided with a slot.

[0011] In a preferred embodiment, a top pin is movably provided on the inner side of the slot, and the top pin passes through the outer casing.

[0012] In a preferred embodiment, the side of the hook near the undamaged needle is an inclined surface, and the angle between this inclined surface and the vertical surface is α.

[0013] In a preferred embodiment, a guide groove is provided on the inner side of the pressure plate, the guide groove is engaged with a guide post, and the guide post is fixedly connected to the inner side of the outer casing.

[0014] The technical effects achieved by this utility model are as follows:

[0015] This practical non-invasive needle extends after the port body and injection head are connected and inserts into the port body for infusion connection. When the injection head is pulled out of the port body, the non-invasive needle is first retracted into the outer shell of the injection head, and then the connection between the injection head and the port body is removed. This ensures that the non-invasive needle is not exposed to the outside world when connecting or disconnecting, thereby avoiding the risk of needle stick injuries to medical staff or patients.

[0016] This device features a hook mounted on the pressure plate and a slot on the outer casing. When the pressure plate is pressed to extend the non-traumatic needle and insert it into the portacavum, the hook engages with the slot, ensuring the non-traumatic needle remains extended and inserted into the portacavum. This facilitates the continuous injection of medication into the patient through the connection between the portacavum and the injection head. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this practical tool;

[0018] Figure 2 This is a half-section enlarged structural diagram of the practical injection head;

[0019] Figure 3 This is a schematic diagram of the structure of this practical hook and slot in the engaged state;

[0020] Figure 4 This is a schematic diagram of the structure between the guide groove and the guide post in this practical application;

[0021] Figure 5 This is a schematic diagram of the structure when the port body is connected to the injection head;

[0022] Figure 6 This is a structural diagram of the included angle of the inclined surface of this practical hook.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Port body; 2. Injection head; 21. Outer shell; 22. Pressure plate; 23. Support plate one; 24. Support plate two; 25. Spring; 26. Non-damaging needle; 211. Slot; 212. Top pin; 221. Guide groove; 222. Guide post; 223. Hook; 231. Through hole. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of this utility model. However, this utility model may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of this utility model. The phrase "in a preferred embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0028] Secondly, this utility model is described in detail with reference to the schematic diagrams. When detailing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0029] Please see the appendix Figure 1 and Figure 2 as well as Figure 5 As shown, this utility model provides an anti-puncture auxiliary device for port-a-cath puncture, including a port body 1 and an injection head 2. The injection head 2 includes an outer shell 21. Inside the outer shell 21, from top to bottom, there are a pressure plate 22, a first support plate 23, and a second support plate 24. The pressure plate 22 is movably disposed inside the outer shell 21. The first support plate 23 and the second support plate 24 are fixed inside the outer shell 21. A spring 25 is disposed between the pressure plate 22 and the first support plate 23. A non-traumatic needle 26 for puncturing into the port body 1 is disposed on the pressure plate 22.

[0030] In this embodiment, when administering medication to the patient through the port body 1, the port body 1 is first implanted under the patient's skin, and the tip of the catheter connected to it is placed in the patient's superior vena cava for connection. When the injection head 2 is connected to the port body 1, the outer shell 21 is first used to align the injection head 2 and the port body 1 (this connection process is not to connect the two dependent structures, but to cover the port body 1 with the outer shell 21. Specifically, the position of the port body 1 can be confirmed by a bulge on the skin, and then the outer shell 21 is placed on the bulge. The size of the outer shell 21 should be larger than the bulge to ensure complete coverage of the port body, but it should not be too large). Then, the pressure plate 22 is pressed, causing the pressure plate 22 to drive the non-traumatic needle 26 to extend downward and pierce into the port body 1, so that the injection head 2 and the port body 1 are connected, which facilitates the medication to enter the patient's body through the injection head 2 and the port body 1, thus meeting the need for medication administration to the patient.

[0031] After the non-abrasive needle 26 of the injection head 2 pierces the skin and enters the port body 1, the connection between the injection head 2 and the port body 1 is completed. In order to prevent the injection head 2 from falling off the patient's body, a medical sterile patch can be attached to the outside of the injection head 2 and then attached to the patient's skin to fix the injection head 2 to the patient, preventing the injection head 2 from falling off the patient's body and allowing for a better connection with the port body 1. In addition, to better fix the injection head 2, a flexible edge (not shown in the figure) can also be provided on the outer edge of the outer shell 21 to provide adhesive points for subsequent adhesive fixation.

[0032] In addition, after the injection head 1 is implanted under the patient's skin, an uneven protrusion (bulge) will form on the skin. In order to ensure that the injection head 2 can better fit and contact the skin after being placed on it, the inner side of the support plate 24 (i.e., Figure 2 (As shown in the shaded area) is made of a flexible material, such as medical silicone, and has sufficient ventilation holes. When the injection head 2 is connected to the body 1, the support sheet 24 can better fit and connect with the skin, increasing the stability of the injection head 2 in combination with human skin.

[0033] Furthermore, when the pressure plate 22 is pressed and the non-damaging needle 26 extends downward, the pressure plate 22 will compress the spring 25, causing the spring 25 to be in a compressed state.

[0034] As shown in the above structure, after the non-invasive needle 26 is connected to the port body 1 and the injection head 2, it extends out by pressing the pressure plate 22 and inserts into the port body 1 for infusion connection. When the injection head 2 is pulled out from the port body 1, the non-invasive needle 26 is first retracted into the outer shell 21 of the injection head 2, and then the connection between the injection head 2 and the port body 1 is removed, so that the non-invasive needle 26 will not be exposed to the outside world when connecting or disconnecting, thereby avoiding the risk of needle stick injury to medical staff or patients.

[0035] Please see Figure 5 As shown, the lower end of the outer shell 21 has a flared structure;

[0036] In this embodiment, the lower end of the outer shell 21 is configured as a flared structure, and the diameter of the lowest end of the outer shell 21 is larger than the diameter of the port body 1. The flared structure of the outer shell 21 facilitates the quick docking of the injection head 2 with the port body 1 through the outer shell 21, so that the non-destructive needle 26 can be inserted into the port body 1 more accurately.

[0037] Please see Figure 3 and Figure 4 As shown, a hook 223 is provided at the lower end of the pressure plate 22, and a through hole 231 is provided on the inner side of the support piece 23 corresponding to the lower part of the hook 223. A slot 211 is provided on the inner side of the outer shell 21, and a top pin 212 is movably provided on the inner side of the slot 211. The top pin 212 passes through the outer shell 21. A guide groove 221 is provided on the inner side of the pressure plate 22. The guide groove 221 is engaged with the guide post 222, and the guide post 222 is fixedly connected to the inner side of the outer shell 21.

[0038] In this embodiment, when the pressure plate 22 is pressed to drive the non-damaging needle 26 to extend outward from the outer shell 21, the downward movement of the pressure plate 22 will simultaneously drive the hook 223 to move down and pass through the through hole 231 of the support piece 23 to latch onto the slot 211 of the outer shell 21 to form a locking structure, keeping the non-damaging needle 26 in the extended state, so that it can be inserted into the port body 1 to form a communication state, which facilitates drug injection;

[0039] When it is necessary to disconnect the injection head 2 from the port body 1, first press the top pin 212 to extend into the outer shell 21, and push the hook 223 to disengage from the slot 211. Under the elastic force of the spring 25, the pressure plate 22 extends upward and drives the non-damaging needle 26 back into the outer shell 21, so that the tip of the non-damaging needle 26 is retracted between the support plate 1 23 and the support plate 24 to prevent leakage and accidental puncture.

[0040] In addition, the pressure plate 22 is engaged with the guide post 222 through the guide groove 221. When the pressure plate 22 moves, it moves along the guide post 222 through the guide groove 221, which guides the movement of the pressure plate 22 and makes it easier to stabilize the movement of the pressure plate 22.

[0041] Please see Figure 6 As shown, the side of the hook 223 near the undamaged needle 26 is an inclined surface, and the angle between this inclined surface and the vertical surface is α.

[0042] In this embodiment, the side of the hook 223 is set as an inclined surface with an included angle of α. When the pressure plate 22 moves the hook 223 downward, the inclined surface of the hook 223 is squeezed against the through hole 231, so that the hook 223 is inclined towards the slot 211, which makes it easier for the hook 223 to be locked in the slot 211. The included angle α is in the range of 3-5°.

[0043] The working principle of this utility model is as follows: When administering medication to a patient through the port body 1, the port body 1 is first implanted under the patient's skin, and the tip of the catheter connected to it is placed in the patient's superior vena cava for connection. When the injection head 2 is connected to the port body 1, the outer shell 21 is first used to align the injection head 2 with the port body 1. Then, the pressure plate 22 is pressed, causing the pressure plate 22 to drive the non-traumatic needle 26 to extend downward and pierce into the port body 1, so that the injection head 2 and the port body 1 are connected, which facilitates the medication to enter the patient's body through the injection head 2 and the port body 1, thus meeting the need for medication administration to the patient.

[0044] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the art.

Claims

1. A puncture prevention auxiliary device for port-a-cath puncture, characterized in that: The device includes a port body (1) and an injection head (2). The injection head (2) includes an outer shell (21). Inside the outer shell (21), from top to bottom, there are a pressure plate (22), a support plate one (23), and a support plate two (24). The pressure plate (22) is movably disposed inside the outer shell (21). The support plate one (23) and the support plate two (24) are fixed inside the outer shell (21). A spring (25) is disposed between the pressure plate (22) and the support plate one (23). A non-damaging needle (26) for piercing into the port body (1) is disposed on the pressure plate (22).

2. The anti-puncture auxiliary device for port-a-cath puncture according to claim 1, characterized in that: The lower end of the outer shell (21) has a flared structure.

3. The anti-puncture auxiliary device for port-a-cath puncture according to claim 1, characterized in that: The lower end of the pressure plate (22) is provided with a hook (223), and the inner side of the support piece (23) is provided with a through hole (231) below the hook (223). The inner side of the outer shell (21) is provided with a slot (211).

4. The anti-puncture auxiliary device for port-a-cath puncture according to claim 3, characterized in that: A top pin (212) is movably provided on the inner side of the slot (211), and the top pin (212) passes through the outer shell (21).

5. The anti-puncture auxiliary device for port-a-cath puncture according to claim 4, characterized in that: The side of the hook (223) near the undamaged needle (26) is an inclined surface, and the angle between this inclined surface and the vertical surface is α.

6. The anti-puncture auxiliary device for port-a-cath puncture according to claim 1, characterized in that: The inner side of the pressure plate (22) is provided with a guide groove (221), which is engaged with the guide post (222), and the guide post (222) is fixedly connected to the inner side of the outer shell (21).

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