A replaceable needle tail puncture guide needle

Abstract

This utility model discloses a replaceable needle tail puncture guide needle, including a connecting tube. A needle body is disposed above the connecting tube, and a slot is formed at the top of the connecting tube. A slider is fixed at an equal angle to the outer side of the lower end of the needle body. A sliding groove is formed at an equal angle inside the connecting tube, and a limiting block is connected to one side of the sliding groove inside the connecting tube. With this replaceable needle tail puncture guide needle, when a different needle body needs to be replaced, medical personnel only need to forcefully rotate the needle body in the opposite direction, causing the slider to move within the sliding groove and pressing the limiting block downwards to release the limiting block. Then, pulling the needle body upwards allows for quick disassembly. Next, one end of the new needle body is inserted into the slot on the connecting tube, and the needle body is rotated in the forward direction, causing the slider to move from one side of the limiting block to the other side, thus completing the installation of the new needle body. This facilitates quick replacement of different needle bodies to meet the needs of medical personnel.

Description

Technical Field

[0001] This utility model relates to the field of puncture guide needle technology, specifically a puncture guide needle with replaceable needle tail. Background Technology

[0002] A puncture guide needle is mainly used for puncture procedures, such as tissue or organ sampling and fluid aspiration. It helps doctors or laboratory personnel perform operations accurately, improving the accuracy and safety of the surgery. Depending on the puncture site and purpose, the puncture guide needle can have different shapes and sizes. However, it has drawbacks: it may shift or even enter the skull during the positioning process, causing accidents. Furthermore, it requires anesthesia before puncture, essentially requiring multiple punctures for the patient, increasing the risk of damage to tissues, blood vessels, and nerves, and prolonging treatment time. For conscious patients under local anesthesia, it increases anxiety, affecting efficacy and comfort, and creating medical safety risks. Additionally, because the needle tail of the local anesthesia puncture needle is not detachable, it cannot achieve local anesthesia with a single needle insertion. The simultaneous completion of several steps, including guidance and cannula insertion, prolongs the operation time and causes patient discomfort. To address these shortcomings, existing technology (Chinese patent application number: 202122013318.1, authorized announcement date 2022-03-08) discloses a puncture guide needle that eliminates the need for prior injection of anesthetic along the puncture path before re-puncture, reducing the number of punctures, minimizing the risk of damage to surrounding tissues, blood vessels, and nerves, shortening treatment time, reducing patient anxiety, and increasing patient comfort. By removing the inner core from the needle body and then placing the inner cannula over the needle body, local anesthesia, guidance and positioning, and subsequent cannula insertion can be achieved simultaneously, shortening the operation time and preventing patient discomfort.

[0003] Existing technology involves injecting anesthetic along the puncture path before re-puncturing, reducing the number of punctures and the risk of damage to surrounding tissues, blood vessels, and nerves. However, because the needle body and the threaded sleeve are connected by threads, it is necessary to rotate the needle body multiple times to remove it when replacing it. In addition, after long-term use, the threads of the threaded connection are prone to wear and stripping, making it impossible to remove, which makes this replacement method quite troublesome. Therefore, we proposed a puncture guide needle with replaceable needle tail, which can effectively solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a replaceable needle tail puncture guide needle to solve the problems mentioned in the background art, which are that the needle body and the threaded sleeve are connected by threads, so that the needle body needs to be rotated multiple times to remove it when it is replaced. At the same time, after long-term use, the threads of the threaded connection are prone to wear and stripping, making it impossible to remove, which makes the replacement method quite troublesome.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a replaceable needle tail puncture guide needle, including a connecting tube, a needle body is provided above the connecting tube, and a slot is provided at the top of the connecting tube; a slider is fixed at an equal angle on the outer side of the lower end of the needle body, a sliding groove is provided at an equal angle inside the connecting tube, a limiting block is connected to one side of the sliding groove inside the connecting tube, and a return spring is installed between the bottom of the limiting block and the inner wall of the connecting tube.

[0006] Preferably, the slide groove is arc-shaped and is connected to the interior of the slot, and the slider and the slide groove are slidably connected.

[0007] Preferably, the limiting block is slidably disposed inside the connecting tube, and the top of the limiting block extends into the interior of the sliding groove, and the bottom of the needle body is engaged with the slot on the connecting tube.

[0008] Preferably, the front of the needle body is provided with scale lines, which can be used to accurately determine the depth of needle puncture.

[0009] Preferably, an injection hose is fixedly provided on the left side of the connecting tube, and a plug is provided at the left end of the injection hose.

[0010] Preferably, sealing caps are connected to both the left and right sides of the bottom of the connecting pipe, and a torsion spring is installed at the connection position between the shaft end of the sealing cap and the connecting pipe.

[0011] Preferably, the two sealing caps are symmetrically hinged on both sides of the connecting pipe, and the sides of the two sealing caps are in contact with the interface of the connecting pipe.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the replaceable needle tail puncture guide needle adopts a novel structural design, the specific details of which are as follows:

[0013] (1) When it is necessary to change different needles, medical staff only need to rotate the needle in the opposite direction to make the slider move in the groove and squeeze the limiting block to make it move downward, thus releasing the limiting of the slider. Then, pull the needle upward to quickly disassemble it. Furthermore, insert one end of the new needle into the slot on the connecting tube. At this time, the slider is inserted into the groove and the needle is rotated in the forward direction to make the slider move in the groove and squeeze the limiting block. At this time, after the slider moves from one side of the limiting block to the other side, the limiting block is reset under the elastic force of the return spring and limits the slider. This can complete the installation of the needle, thus facilitating the quick replacement of different needles to meet the needs of medical staff.

[0014] (2) The depth of needle puncture can be accurately determined by the scale lines set on the needle body. At the same time, the injection tubing can be used to conveniently inject anesthetic or other drugs into the needle body, increasing functionality.

[0015] (3) The interface of the connecting tube is sealed and protected by two sealing caps, which can prevent external dust and impurities from entering the interior of the connecting tube when not in use. When the connecting tube is used, simply rotate the two sealing caps outward and insert the external medical device into the interface of the connecting tube. At the same time, the two sealing caps rotate back to their original position under the stored force of the torsion spring, and can clamp and fix the medical device, thereby ensuring the stability of the connection between the external medical device and the connecting tube. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main cross-sectional structure of the connecting pipe of this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the connecting tube and injection tubing of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the sealing cap of this utility model;

[0019] Figure 4 This is a schematic diagram of the two sealing caps rotating outwards in this utility model;

[0020] Figure 5 This is a schematic diagram of the connection structure between the limiting block and the reset spring of this utility model;

[0021] Figure 6 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0022] In the diagram: 1. Connecting tube; 2. Needle body; 3. Slot; 4. Scale line; 5. Slider; 6. Injection tubing; 7. Limiting block; 8. Slide groove; 9. Sealing cap; 10. Torsion spring; 11. Return spring. Detailed Implementation

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

[0024] Please see Figures 1-6 The present invention provides the following technical solution: a puncture guide needle with replaceable needle tail;

[0025] Example 1: To address the problem in the prior art where the needle body 2 and the threaded sleeve are connected by a thread, requiring multiple rotations of the needle body 2 to remove it during replacement, and the threaded connection is prone to wear and stripping after prolonged use, making removal impossible and resulting in a cumbersome replacement method, the following solution is disclosed. Please refer to the following for details. Figure 1 , Figure 2 and Figure 5 As shown, the device includes a connecting tube 1, a needle body 2 is provided above the connecting tube 1, and a slot 3 is provided at the top of the connecting tube 1. A limiting block 7 is slidably disposed inside the connecting tube 1, and the top of the limiting block 7 extends into the interior of the sliding groove 8. The bottom of the needle body 2 is engaged with the slot 3 on the connecting tube 1. A slider 5 is fixed at an equal angle on the outer side of the lower end of the needle body 2. A sliding groove 8 is provided at an equal angle inside the upper part of the connecting tube 1. The sliding groove 8 is arc-shaped and is connected to the interior of the slot 3. The slider 5 is slidably connected to the sliding groove 8. A limiting block 7 is connected inside the connecting tube 1 on one side of the sliding groove 8, and a return spring 11 is installed between the bottom of the limiting block 7 and the inner wall of the connecting tube 1.

[0026] Medical staff insert needle 2 into the patient's body to perform sampling or fluid extraction. After the operation is completed, needle 2 is removed from the patient's body. When it is necessary to replace needle 2, medical staff only need to forcefully rotate needle 2 in the opposite direction, causing slider 5 to move in the groove 8 and press the limiting block 7, causing it to move downward (return spring 11 is in a compressed state), thus releasing the limitation on slider 5. Then, pulling needle 2 upward allows for quick disassembly. Then, one end of the new needle 2 is inserted into the slot 3 on the connecting tube 1. At this time, slider 5 is inserted into the groove 8, and needle 2 is rotated in the forward direction, causing slider 5 to move in the groove 8 and press the limiting block 7. After slider 5 moves from one side of the limiting block 7 to the other side, the limiting block 7 is reset by the elastic force of the return spring 11 and limits slider 5. This completes the installation of needle 2, facilitating quick replacement of different needle 2 to meet the needs of medical staff.

[0027] Example 2: Unlike Example 1, this example utilizes the set scale line 4 to accurately determine the puncture depth of the needle body 2. See details... Figures 1-4 As shown, the needle body 2 has a scale line 4 on its front side. The scale line 4 can be used to accurately determine the puncture depth of the needle body 2. An injection tube 6 is fixed on the left side of the connecting tube 1, and a plug is provided at the left end of the injection tube 6.

[0028] When the needle 2 is inserted into the patient's body, the depth of the needle 2 can be accurately determined by the set scale line 4. Then, the medical staff can remove the plug on the injection tubing 6. The set injection tubing 6 can conveniently inject anesthetic or other drugs into the needle 2 to increase functionality.

[0029] Example 3: Unlike Example 2, this example uses two sealing caps 9 to seal and protect the interface of the connecting pipe 1. See details... Figures 1-4 and Figure 6 As shown, sealing caps 9 are connected to both the left and right sides of the bottom of the connecting pipe 1, and torsion springs 10 are installed at the connection positions of the shaft end of the sealing cap 9 and the connecting pipe 1. The two sealing caps 9 are symmetrically hinged on both sides of the connecting pipe 1, and the sides of the two sealing caps 9 are in contact with the interface of the connecting pipe 1.

[0030] The two sealing caps 9 seal the interface of the connecting tube 1, preventing external dust and impurities from entering the connecting tube 1 when not in use. When the connecting tube 1 is in use, simply rotate the two sealing caps 9 outward and insert the external medical device into the interface of the connecting tube 1. At the same time, the two sealing caps 9 rotate back to their original position under the stored force of the torsion spring 10, and can clamp and fix the medical device, thereby ensuring the stability of the connection between the external medical device and the connecting tube 1.

[0031] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A needle tail replaceable puncture guide needle, comprising a connecting pipe (1), a needle body (2) is arranged above the connecting pipe (1), and a clamping groove (3) is formed in the top of the connecting pipe (1); characterized in that, A slider (5) is fixed at an equal angle on the outer side of the lower end of the needle body (2). A groove (8) is opened at an equal angle on the upper part of the inside of the connecting tube (1). A limit block (7) is connected to one side of the groove (8) inside the connecting tube (1). A reset spring (11) is installed between the bottom of the limit block (7) and the inner wall of the connecting tube (1).

2. The replaceable needle tail puncture guide needle according to claim 1, characterized in that: The slide groove (8) is arc-shaped and is connected to the interior of the slot (3). The slider (5) and the slide groove (8) are slidably connected.

3. The replaceable needle tail puncture guide needle according to claim 1, characterized in that: The limiting block (7) is slidably disposed inside the connecting tube (1), and the top of the limiting block (7) extends into the interior of the sliding groove (8). The bottom of the needle body (2) is engaged with the slot (3) on the connecting tube (1).

4. The replaceable needle tail puncture guide needle according to claim 1, characterized in that: The needle body (2) has a scale line (4) on its front side, which can be used to accurately determine the depth of the needle body (2) puncture.

5. A replaceable needle tail puncture guide needle according to claim 1, characterized in that: An injection hose (6) is fixedly provided on the left side of the connecting pipe (1), and a plug is provided at the left end of the injection hose (6).

6. The replaceable needle tail puncture guide needle according to claim 1, characterized in that: The bottom of the connecting pipe (1) is connected to sealing caps (9) on both the left and right sides, and a torsion spring (10) is installed at the connection position between the shaft end of the sealing cap (9) and the connecting pipe (1).

7. A replaceable needle tail puncture guide needle according to claim 6, characterized in that: The two sealing caps (9) are symmetrically hinged on both sides of the connecting pipe (1), and the sides of the two sealing caps (9) are in contact with the interface of the connecting pipe (1).

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