Anti-blocking retractable indwelling needle

Abstract

The utility model discloses a telescopic anti -blocking indwelling needle belongs to medical product technical field, including the catheter seat, the metal wedge is fixedly connected in the catheter seat, one end of metal wedge is fixedly connected with the flexible catheter, and the one end of flexible catheter is away from metal wedge and is penetrated to the front side of catheter seat, the isolation plug assembly is arranged in the catheter seat, and the isolation plug assembly is located the back of metal wedge, the rear portion of catheter seat is slidably connected with the telescopic push pipe of multiple sections, and the rear end of telescopic push pipe of multiple sections is penetrated to the back of catheter seat, the rear portion of telescopic push pipe of multiple sections is fixedly connected with silica gel gasket, and the rear end of telescopic push pipe of multiple sections is detachably connected with needle core seat, when the patient does not transfuse, the telescopic push pipe of multiple sections can retract to the catheter seat, and the blocking pipe is inserted into the flexible catheter and is completed to block, prevent the blood flow of patient to cause the blockage in the flexible catheter, shorten the length of whole indwelling needle simultaneously, and the paste fixing of patient's hand is convenient.

Description

Technical Field

[0001] This utility model relates to the field of medical product technology, and more specifically, to a retractable anti-clogging indwelling needle. Background Technology

[0002] An indwelling needle, also known as a peripheral intravenous catheter, intravenous catheter, or cannula, is an infusion tool. Its core components include a stainless steel puncture guide needle (metal needle core) and a flexible catheter that can be left in the blood vessel.

[0003] Authorized publication number "CN109498897A" discloses an anti-clogging indwelling needle, comprising: a needle tube, a sealing tube, a push tube, and a catheter seat; the needle tube is installed at one end of the catheter seat and communicates with the catheter seat; the sealing tube is located in the catheter seat, and the outer diameter of the sealing tube corresponds to the diameter of the needle tube; one end of the sealing tube selectively extends into the needle tube; one end of the push tube extends into the catheter seat from the other end and connects to the other end of the sealing tube. The anti-clogging indwelling needle of this invention, by incorporating a sealing tube, can extend into the needle tube when not infusion is being administered, effectively sealing the needle tube and preventing blood from flowing into the indwelling needle tube and causing blockage.

[0004] In the aforementioned published patent applications, the anti-clogging indwelling needle uses a sealing tube that can be inserted into the needle tube when not infusion to seal the needle tube and prevent blood from flowing into it and causing blockage. However, in order to prevent blockage, the indwelling needle requires a relatively long section of tube to extend from the end of the catheter seat to accommodate the sealing tube, resulting in an excessively long indwelling needle that is inconvenient to attach to the user's hand. Therefore, this utility model proposes a retractable anti-clogging indwelling needle. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] In view of the problems existing in the prior art, the purpose of this utility model is to provide a retractable anti-clogging indwelling needle, which aims to solve the problem that in order to prevent the needle tube from becoming blocked, the tail of the catheter seat needs to leave a long tube to meet the requirement of the sealing tube extending into the needle tube, resulting in the indwelling needle being too long and inconvenient to stick to the user's hand.

[0007] 2. Technical Solution

[0008] To solve the above problems, the present invention adopts the following technical solution:

[0009] A retractable anti-clogging indwelling needle includes a catheter seat, a metal wedge fixedly connected inside the catheter seat, a flexible catheter fixedly connected to one end of the metal wedge, and the end of the flexible catheter away from the metal wedge extending to the front side of the catheter seat. An isolation plug assembly is disposed inside the catheter seat, located behind the metal wedge. Multiple telescopic push tubes are slidably connected to the rear part of the catheter seat, with their rear ends extending to the rear side of the catheter seat. A silicone gasket is fixedly connected to the rear part of the multiple telescopic push tubes. A needle core seat is detachably connected to the rear end of the multiple telescopic push tubes. A puncture needle core is fixedly connected inside the needle core seat, with one end of the puncture needle core sequentially passing through the silicone gasket, the multiple telescopic push tubes, the isolation plug assembly, the metal wedge, and the flexible catheter. A sealing tube is fixedly connected inside the multiple telescopic push tubes, with one end of the sealing tube passing through the isolation plug assembly and corresponding to the metal wedge. A limit tube is detachably connected to the outer surface of the multiple telescopic push tubes, located between the rear end of the catheter seat and the rear part of the multiple telescopic push tubes.

[0010] As a preferred embodiment of this utility model, a limiting piece is engaged inside the catheter seat, and the limiting piece corresponds to the rear end of the isolation plug assembly.

[0011] As a preferred embodiment of this utility model, each sliding connection within the multi-section telescopic push tube is provided with a sealing ring, and the sliding connection between the multi-section telescopic push tube and the guide seat is provided with the same sealing ring.

[0012] As a preferred embodiment of this utility model, the outer surface of the needle core holder is provided with a guide mark.

[0013] As a preferred embodiment of this utility model, a needle-retrieving handle is fixedly connected to the outer surface of the needle core seat, and the needle-retrieving handle is located outside the limiting tube.

[0014] As a preferred embodiment of this utility model, one end of the sealing tube is fixedly connected to a guide head, and the guide head corresponds to the metal wedge.

[0015] 3. Beneficial effects

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] (1) In this scheme, the multi-section telescopic push tube is set at the tail of the catheter seat and can be telescopic. After extension, it is supported by the limiting tube, so as to leave enough length to facilitate the insertion of the puncture needle core into the flexible catheter to puncture the patient's blood vessels. When the patient is not receiving infusion, the multi-section telescopic push tube can retract into the catheter seat and move the sealing tube to insert into the flexible catheter to complete the sealing, preventing the patient's blood from flowing into the flexible catheter and causing blockage. At the same time, it shortens the length of the entire indwelling needle, making it convenient to stick and fix it on the patient's hand. Attached Figure Description

[0018] Figure 1 This is a front view of the retractable anti-clogging indwelling needle of this utility model;

[0019] Figure 2 This is a cross-sectional view of the retractable anti-clogging indwelling needle in this utility model;

[0020] Figure 3 This is a cross-sectional view of the retractable anti-clogging indwelling needle in the retracted state of this utility model.

[0021] Explanation of the labels in the diagram:

[0022] 1. Catheter seat; 2. Metal wedge; 3. Flexible catheter; 4. Isolation plug assembly; 5. Multi-section telescopic push tube; 6. Silicone gasket; 7. Needle core seat; 8. Puncture needle core; 9. Occlusion tube; 10. Limiting tube; 11. Limiting plate; 12. Sealing ring; 13. Guide mark; 14. Needle extraction handle; 15. Guide head. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example:

[0027] Please see Figure 1-3 A retractable anti-clogging indwelling needle includes a catheter seat 1, a metal wedge 2 fixedly connected inside the catheter seat 1, a flexible catheter 3 fixedly connected to one end of the metal wedge 2, and the end of the flexible catheter 3 away from the metal wedge 2 extending to the front side of the catheter seat 1. An isolation plug assembly 4 is provided inside the catheter seat 1, and the isolation plug assembly 4 is located behind the metal wedge 2. Multiple telescopic push tubes 5 are slidably connected to the rear part of the catheter seat 1, and the rear ends of the multiple telescopic push tubes 5 extend to the rear side of the catheter seat 1. A silicone gasket 6 is fixedly connected to the rear part of the multiple telescopic push tubes 5. The rear end of the retractable push tube 5 is detachably connected to a needle core seat 7. A puncture needle core 8 is fixedly connected inside the needle core seat 7. One end of the puncture needle core 8 sequentially passes through a silicone pad 6, a multi-section telescopic push tube 5, an isolation plug assembly 4, a metal wedge 2, and a flexible catheter 3. A sealing tube 9 is fixedly connected inside the multi-section telescopic push tube 5. One end of the sealing tube 9 passes through the isolation plug assembly 4 and corresponds to the metal wedge 2. A limiting tube 10 is detachably connected to the outer surface of the multi-section telescopic push tube 5. The limiting tube 10 is located between the rear end of the catheter seat 1 and the rear part of the multi-section telescopic push tube 5.

[0028] In this embodiment, the catheter hub 1 is common knowledge to those skilled in the art and will not be described in detail here. The flexible catheter 3 is fixed to one end of the catheter hub 1 by a metal wedge 2. The needle core seat 7 is installed at the tail of the multi-section telescopic push tube 5, so that one end of the puncture needle core 8 sequentially passes through the silicone pad 6, the multi-section telescopic push tube 5, the isolation plug assembly 4, the metal wedge 2, and the flexible catheter 3. The puncture needle core 8 has a certain strength and can guide the flexible catheter 3 to be punctured into the patient's blood vessel. The silicone pad 6 and the isolation plug assembly 4 form a puncture passage inside the puncture needle core 8, and the puncture passage covers the puncture needle core. The outer surface of the puncture needle core 8 has a holding force on the wall of the needle core 8, which can prevent blood or drug leakage and prevent bacteria from entering the indwelling needle. The sealing tube 9, which penetrates the isolation plug assembly 4, also forms the same protective effect. The multi-section telescopic push tube 5 is composed of multiple push tubes, which can realize multi-section sliding extension and retraction. When the multi-section telescopic push tube 5 is extended to its maximum length, the limiting tube 10 is engaged with the outer surface of the multi-section telescopic push tube 5. The two ends of the limiting tube 10 correspond to the tail of the multi-section telescopic push tube 5 and the rear end of the catheter seat 1, respectively, so that the extension and retraction length of the multi-section telescopic push tube 5 remains fixed. When the indwelling needle is used, it is pressed by pressing Holding the rear end of the needle core seat 7, the flexible catheter 3 is punctured into the patient's blood vessel through the puncture needle core 8. Then, the puncture needle core 8 is pulled out of the flexible catheter 3 using the needle core seat 7. The catheter seat 1 is connected to the medication tubing, and medication is delivered to the patient through the flexible catheter 3 for treatment. When the patient no longer needs medication, the limiting tube 10 is removed from the outer surface of the multi-section telescopic push tube 5, and the rear end of the multi-section telescopic push tube 5 is pressed, causing the multi-section telescopic push tube 5 to retract inwards towards the rear of the metal wedge 2. The sealing tube 9 is fixed inside the last section of the multi-section telescopic push tube 5. The retraction of the multi-section telescopic push tube 5 will cause the sealing tube 9 to be inserted. The needle is inserted into the metal wedge 2 and gradually enters the flexible catheter 3 to complete the occlusion of the indwelling needle. At the same time, the length of the entire indwelling needle is shortened, making it easier to fix the indwelling needle in the patient's hand. A needle-puncture prevention spring can be set between the needle core seat 7 and the tail end of the multi-section telescopic push tube 5. The needle-puncture prevention spring is a common accessory on existing indwelling needles. The puncture needle core 8 passes through the needle-puncture prevention spring. The needle-puncture prevention spring has a guiding function, which can ensure that the puncture needle core 8 does not bend when inserted into the indwelling needle. Moreover, when the puncture needle core 8 is removed from the indwelling needle, the needle-puncture prevention spring will lock at the front end of the puncture needle core 8 to prevent needle puncture, thus protecting the use of medical staff.

[0029] Specifically, a limiting piece 11 is engaged inside the catheter seat 1, and the limiting piece 11 corresponds to the rear end of the isolation plug assembly 4.

[0030] In this embodiment, the limiting piece 11 is used to restrict the isolation plug assembly 4, so that the isolation plug assembly 4 is stable inside the catheter seat 1 to prevent blood or drug leakage.

[0031] Specifically, each sliding connection of the multi-section telescopic push tube 5 is provided with a sealing ring 12, and the sliding connection between the multi-section telescopic push tube 5 and the guide tube seat 1 is provided with the same sealing ring 12.

[0032] In this embodiment, the multi-section telescopic push tube 5 is composed of multiple push tubes, which enable the sliding extension and retraction of the multi-section telescopic push tube 5. Each push tube is provided with a sealing ring 12. Multiple sealing rings 12 are located at the sliding connection between the multi-section push tube and the catheter seat 1, which can ensure the sealing of the multi-section telescopic push tube 5 and the catheter seat 1.

[0033] Specifically, the outer surface of the needle core holder 7 is provided with a guide mark 13.

[0034] In this embodiment, the guide mark 13 is used to indicate the direction of needle core seat 7 removal, ensuring that medical staff can accurately remove the puncture needle core 8 from the indwelling needle.

[0035] Specifically, a needle-retrieving handle 14 is fixedly connected to the outer surface of the needle core holder 7, and the needle-retrieving handle 14 is located outside the limiting tube 10.

[0036] In this embodiment, medical staff can pull out the needle core holder 7 through the needle removal handle 14, making it easier to remove the puncture needle core 8 from the needle core holder 7.

[0037] Specifically, one end of the sealing tube 9 is fixedly connected to a guide head 15, and the guide head 15 corresponds to the metal wedge 2.

[0038] In this embodiment, one end of the guide head 15 has a guiding angle, which can guide the sealing tube 9 to be accurately inserted into the metal wedge 2 to achieve the sealing of the flexible conduit 3.

[0039] Working principle: When the patient needs to use an indwelling needle, by pressing the rear end of the needle core seat 7, the flexible catheter 3 is punctured into the patient's blood vessel through the puncture needle core 8. Then, the puncture needle core 8 is pulled out from the flexible catheter 3 using the needle core seat 7. The catheter seat 1 is connected to the medication tube, and the medication is delivered to the patient through the flexible catheter 3 for treatment. When the patient does not need medication, the limiting tube 10 is removed from the outer surface of the multi-section telescopic push tube 5, removing the restriction on the retraction of the multi-section telescopic push tube 5. The rear end of the multi-section telescopic push tube 5 is pressed to retract into the metal wedge 2. The multi-section telescopic push tube 5 drives the sealing tube 9 through the metal wedge 2 into the flexible catheter 3, completing the sealing of the indwelling needle. At the same time, the length of the entire indwelling needle is shortened, making it easier to fix the indwelling needle in the patient's hand.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A retractable anti-jamming indwelling needle comprising a catheter hub (1), characterized in that: A metal wedge (2) is fixedly connected inside the catheter seat (1). A flexible catheter (3) is fixedly connected to one end of the metal wedge (2), and the end of the flexible catheter (3) away from the metal wedge (2) extends to the front side of the catheter seat (1). An isolation plug assembly (4) is provided inside the catheter seat (1), and the isolation plug assembly (4) is located behind the metal wedge (2). A multi-section telescopic push tube (5) is slidably connected inside the rear part of the catheter seat (1), and the rear end of the multi-section telescopic push tube (5) extends to the rear side of the catheter seat (1). A silicone gasket (6) is fixedly connected inside the rear part of the multi-section telescopic push tube (5). The end is detachably connected to a needle core seat (7), and a puncture needle core (8) is fixedly connected inside the needle core seat (7). One end of the puncture needle core (8) sequentially passes through a silicone pad (6), a multi-section telescopic push tube (5), an isolation plug assembly (4), a metal wedge (2), and a flexible catheter (3). A sealing tube (9) is fixedly connected inside the multi-section telescopic push tube (5), and one end of the sealing tube (9) passes through the isolation plug assembly (4) and corresponds to the metal wedge (2). A limiting tube (10) is detachably connected to the outer surface of the multi-section telescopic push tube (5), and the limiting tube (10) is located between the rear end of the catheter seat (1) and the rear part of the multi-section telescopic push tube (5).

2. The retractable anti-block indwelling needle according to claim 1, characterized in that: The catheter seat (1) is fitted with a limiting piece (11), and the limiting piece (11) corresponds to the rear end of the isolation plug assembly (4).

3. The retractable anti-block indwelling needle according to claim 2, characterized in that: All sliding connections within the multi-section telescopic push tube (5) are provided with sealing rings (12), and the sliding connections between the multi-section telescopic push tube (5) and the guide seat (1) are provided with the same sealing rings (12).

4. The retractable anti-block indwelling needle according to claim 3, characterized in that: The outer surface of the needle core holder (7) is provided with a guide mark (13).

5. The retractable anti-block indwelling needle according to claim 4, wherein: The needle core holder (7) is fixedly connected to a needle extraction handle (14) on its outer surface, and the needle extraction handle (14) is located outside the limiting tube (10).

6. The retractable anti-block indwelling needle according to claim 5, characterized in that: One end of the sealing tube (9) is fixedly connected to a guide head (15), and the guide head (15) corresponds to the metal wedge (2).

Images