Retention needle with protection function

Abstract

The utility model discloses a retention needle with a protection function. The retention needle comprises a puncture assembly, a retention assembly, a fixing assembly and a positive pressure assembly. The retention assembly comprises a guide pipe and a first branch pipe; the first branch pipe is communicated with the guide pipe; the puncture assembly comprises a puncture needle, a needle seat and a rotating seat, the two ends of the needle seat are connected with the puncture needle and the rotating seat respectively, the puncture needle is sleeved with the catheter, the length of the catheter is larger than that of the puncture needle, the sum of the length of the needle seat and the length of the puncture needle is larger than that of the catheter, and one third of the needle seat is in threaded connection with the catheter in the unused state. The fixing assembly is arranged on the rotating seat and is connected with the first branch pipe; the positive pressure assembly is used for preventing liquid in the catheter from flowing back. According to the retention needle protecting device, medical staff cannot be punctured when taking a retention needle, a puncture needle is effectively protected, and the problem that the pain of a patient is increased due to the fact that a needle head of the puncture needle is damaged is solved.

Description

Technical Field

[0001] This utility model relates to the field of indwelling needles, and more specifically, to an indwelling needle with a protective function. Background Technology

[0002] For patients requiring multiple punctures and injections, indwelling needles reduce patient discomfort to some extent. Currently, indwelling needle punctures and injections are commonly used before surgery to ensure that anesthesiologists administer medication according to the patient's vital signs.

[0003] During the use of indwelling needles, the protective sheath at the needle tip needs to be pulled out vertically before puncture. Due to the uncertainty of the way medical staff hold the needle, the force of pulling it out, and the angle, there may be risks such as: damage to the needle tip of the indwelling needle, increased pain for the patient, and needle stick injuries to medical staff.

[0004] Therefore, how to provide a protective retention needle has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] One objective of this invention is to provide a new technical solution for a retaining needle with a protective function.

[0006] According to a first aspect of the present invention, a protective indwelling needle is provided, comprising: a puncture assembly, an indwelling assembly, a fixation assembly, and a positive pressure assembly;

[0007] The retention assembly includes a catheter and a first branch tube, the first branch tube being connected to the catheter;

[0008] The puncture assembly includes a puncture needle, a needle hub, and a rotating seat. The two ends of the needle hub are respectively connected to the puncture needle and the rotating seat. The catheter is sleeved outside the puncture needle and is threadedly connected to the needle hub. The length of the catheter is greater than the length of the puncture needle, and the sum of the lengths of the needle hub and the puncture needle is greater than the length of the catheter. In the unused state, one-third of the needle hub is threadedly connected to the catheter.

[0009] The fixing component is disposed on the rotating seat and connected to the first branch pipe;

[0010] The positive pressure component is used to prevent backflow of liquid within the conduit.

[0011] Optionally, the outer peripheral wall of the needle hub is provided with external threads, and the inner wall of the conduit is provided with internal threads.

[0012] Optionally, the puncture assembly further includes a rotating plate connected to the outer peripheral wall of the rotating seat for rotating the rotating seat.

[0013] Optionally, a protective sleeve is also provided on the outside of the catheter, the inner diameter of the protective sleeve being larger than the outer diameter of the catheter, and the protective sleeve being slidably connected to the catheter.

[0014] Optionally, the fixing component includes a fixing collar, a connecting rope, a first elastic band, and a second elastic band. The fixing collar is sleeved on the bottom of the rotating seat. The first end of the connecting rope is connected to the fixing collar, and the second end of the connecting rope is connected to the first end of the first elastic band and the first end of the second elastic band, respectively. The first elastic band and the second elastic band are wound around the first branch pipe, and the second end of the first elastic band is engaged with the second end of the second elastic band.

[0015] Optionally, a plurality of snap-fit ​​blocks are provided on the second end of the first elastic band, and a plurality of card interfaces are provided on the second end of the second elastic band, with the plurality of snap-fit ​​blocks connected to the plurality of card interfaces.

[0016] Optionally, the positive pressure assembly includes a positive pressure valve, a first end of the first branch pipe is connected to the conduit, and the angle formed between the first branch pipe and the conduit is an acute angle, and the positive pressure valve is disposed at the second end of the first branch pipe.

[0017] Optionally, the retention assembly further includes a second branch pipe and a sealing cap, wherein a first end of the second branch pipe is connected to the positive pressure valve, and the sealing cap is connected to a second end of the second branch pipe.

[0018] Optionally, a sealing element is also provided on the second end of the first branch pipe.

[0019] The beneficial effects of this utility model are as follows:

[0020] This invention connects the two ends of the needle hub to the puncture needle and the rotating seat respectively. A catheter is fitted over the puncture needle and threadedly connected to the needle hub. The length of the catheter is greater than the length of the puncture needle, and the sum of the lengths of the needle hub and the puncture needle is greater than the length of the catheter. A fixing component is mounted on the rotating seat and connected to the first branch tube. In the unused state, one-third of the needle hub is threadedly connected to the catheter, ensuring the entire puncture needle is inside the catheter, preventing injury to medical personnel when retrieving the indwelling needle. Next, the medical personnel rotate the rotating seat, allowing the needle hub to fully enter the catheter. At this point, the needle tip moves to the outside of the catheter, enabling the medical personnel to perform the puncture. This effectively protects the puncture needle, preventing damage to the needle tip and increased patient pain.

[0021] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0023] Figure 1 This is a structural diagram of the retaining needle with protective function according to this utility model;

[0024] Figure 2 This is a cross-sectional view of the protective retaining needle of this utility model.

[0025] The following are labeled in the diagram: 1. Puncture assembly; 11. Puncture needle; 12. Needle seat; 13. Rotating seat; 14. Rotating plate; 15. External thread; 2. Retention assembly; 21. Catheter; 22. First branch tube; 23. Second branch tube; 24. Sealing cap; 25. Internal thread; 3. Fixing assembly; 31. Fixing collar; 32. Connecting rope; 33. First elastic band; 34. Second elastic band; 4. Positive pressure assembly; 41. Positive pressure valve; 42. Sealing component; 5. Protective sleeve. Detailed Implementation

[0026] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0027] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0028] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0029] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0030] like Figure 1 and Figure 2 As shown, this utility model embodiment provides a retaining needle with a protective function, including: a puncture component 1, a retaining component 2, a fixing component 3, and a positive pressure component 4.

[0031] The retention component 2 includes a catheter 21 and a first branch tube 22, which is connected to the catheter 21. Specifically, the first branch tube 22 is used to introduce the medication into the catheter 21 and to deliver the medication into the patient's body through the catheter 21.

[0032] The puncture assembly 1 includes a puncture needle 11, a needle hub 12, and a rotating seat 13. Both ends of the needle hub 12 are connected to the puncture needle 11 and the rotating seat 13, respectively. A catheter 21 is fitted over the puncture needle 11 and threadedly connected to the needle hub 12. The length of the catheter 21 is greater than the length of the puncture needle 11, and the sum of the lengths of the needle hub 12 and the puncture needle 11 is greater than the length of the catheter 21. In the unused state, one-third of the needle hub 12 is threadedly connected to the catheter 21, at which point the puncture needle 11 is entirely located inside the catheter 21. When the needle hub 12 is fully moved inside the catheter 21, the tip of the puncture needle 11 moves to the outside of the catheter 21, thus enabling puncture treatment.

[0033] The fixing component 3 is mounted on the rotating seat 13 and connected to the first branch tube 22. The fixing component 3 is used to fix the needle seat 12 and the rotating seat 13.

[0034] The positive pressure component 4 is used to prevent backflow of liquid in the catheter 21. Through the action of the positive pressure component 4, the indwelling needle of this invention can maintain positive pressure during the process of pulling out the infusion tube, thus preventing blood from flowing back into the indwelling needle.

[0035] During the insertion of the indwelling needle into the patient, medical staff first tear open the warranty of the indwelling needle and remove it. Since one-third of the needle hub 12 is threadedly connected to the catheter 21 when not in use, the puncture needle 11 is entirely inside the catheter 21, preventing injury to medical staff when removing the needle. Next, the force acts on the fixing component 3, releasing it from fixing the needle hub 12 and the rotating seat 13. Then, the medical staff rotates the rotating seat 13, causing the needle hub 12 to fully enter the catheter 21. At this point, the needle tip of the puncture needle 11 moves to the outside of the catheter 21, allowing the medical staff to perform the puncture.

[0036] After the puncture is completed, the medical staff rotates the rotating seat 13 again to remove the needle seat 12 from the catheter 21, and then removes the puncture needle 11, thus leaving the catheter 21 in the patient's body.

[0037] This invention connects the two ends of the needle hub 12 to the puncture needle 11 and the rotating seat 13 respectively. The catheter 21 is sleeved outside the puncture needle 11 and threadedly connected to the needle hub 12. The length of the catheter 21 is greater than the length of the puncture needle 11, and the sum of the lengths of the needle hub 12 and the puncture needle 11 is greater than the length of the catheter 21. A fixing component 3 is mounted on the rotating seat 13 and connected to the first branch tube 22. In the unused state, one-third of the needle hub 12 is threadedly connected to the catheter 21, ensuring the puncture needle 11 is entirely within the catheter 21, preventing injury to medical personnel when retrieving the indwelling needle. Next, the medical personnel rotate the rotating seat 13, causing the needle hub 12 to fully enter the catheter 21. At this point, the needle tip of the puncture needle 11 moves to the outside of the catheter 21, allowing the medical personnel to perform the puncture. This effectively protects the puncture needle 11, preventing damage to the needle tip and increased patient pain.

[0038] Furthermore, the outer peripheral wall of the needle seat 12 is provided with an external thread 15, and the inner wall of the guide tube 21 is provided with an internal thread 25. Specifically, the length of the external thread 15 is equal to the length of the needle seat 12.

[0039] In one embodiment of the protective retaining needle of this utility model, such as Figure 1 and Figure 2 As shown, in order to improve the ease of rotation of the rotating seat 13, the puncture assembly 1 also includes a rotating plate 14, which is connected to the outer peripheral wall of the rotating seat 13 and is used to rotate the rotating seat 13.

[0040] In one embodiment of the protective retaining needle of this utility model, such as Figure 1 and Figure 2 As shown, a protective sleeve 5 is also fitted on the outside of the conduit 21. The inner diameter of the protective sleeve 5 is larger than the outer diameter of the conduit 21, and the protective sleeve 5 is slidably connected to the conduit 21.

[0041] This invention provides a protective sleeve 5 that is fitted over the outside of the catheter 21, with the inner diameter of the protective sleeve 5 being larger than the outer diameter of the catheter 21, and the protective sleeve 5 being slidably connected to the catheter 21. This protective sleeve 5 seals the catheter 21, preventing the puncture needle 11 from being contaminated.

[0042] In one embodiment of the protective retaining needle of this utility model, such as Figure 1 and Figure 2As shown, the fixing component 3 includes a fixing collar 31, a connecting rope 32, a first elastic band 33, and a second elastic band 34. The fixing collar 31 is sleeved on the bottom of the rotating seat 13. The first end of the connecting rope 32 is connected to the fixing collar 31, and the second end of the connecting rope 32 is connected to the first end of the first elastic band 33 and the first end of the second elastic band 34, respectively. The first elastic band 33 and the second elastic band 34 are wrapped around the first branch pipe 22, and the second end of the first elastic band 33 is engaged with the second end of the second elastic band 34.

[0043] Specifically, the fixing collar 31 can be fixedly mounted on the bottom of the rotating seat 13, or the fixing collar 31 can be elastic, so that the fixing collar 31 and the rotating seat 13 are interference-fitted to be fixed on the bottom of the rotating seat 13, or it can be done in other ways, which are not limited here.

[0044] This invention connects the first end of the connecting rope to the fixing collar 31, and the second end of the connecting rope 32 to the first end of the first elastic band 33 and the first end of the second elastic band 34 respectively. The first elastic band 33 and the second elastic band 34 are wrapped around the first branch tube 22, thereby fixing the rotating seat 13 and avoiding the problem that the rotation of the rotating seat 13 would cause the needle tip of the puncture needle 11 to move to the outside of the catheter 21, which would lead to injury to medical staff.

[0045] In one embodiment of the protective retaining needle of this utility model, a plurality of snap-fit ​​blocks are provided on the second end of the first elastic band 33, and a plurality of snap-fit ​​interfaces are provided on the second end of the second elastic band 34, with the plurality of snap-fit ​​blocks connected to the plurality of snap-fit ​​interfaces.

[0046] This invention improves the stability of the connection between the first elastic band 33 and the second elastic band 34 by setting multiple snap-fit ​​blocks on the second end of the first elastic band 33 and multiple snap-fit ​​interfaces on the second end of the second elastic band 34, thereby connecting the multiple snap-fit ​​blocks with the multiple snap-fit ​​interfaces.

[0047] In one embodiment of the protective retaining needle of this utility model, such as Figure 1 and Figure 2 As shown, the positive pressure assembly 4 includes a positive pressure valve 41, the first end of the first branch pipe 22 is connected to the conduit 21, and the angle formed between the first branch pipe 22 and the conduit 21 is an acute angle. The positive pressure valve 41 is located at the second end of the first branch pipe 22.

[0048] This invention connects the first end of the first branch tube 22 to the catheter 21, and the angle formed between the first branch tube 22 and the catheter 21 is an acute angle. A positive pressure valve 41 is set at the second end of the first branch tube 22. Through the action of the positive pressure valve 41, the indwelling needle of this invention can maintain positive pressure continuously during the process of pulling out the infusion tube, thus preventing blood from flowing back into the indwelling needle.

[0049] In one embodiment of the protective retaining needle of this utility model, such as Figure 1 and Figure 2 As shown, the retention assembly 2 also includes a second branch pipe 23 and a sealing cap 24. The first end of the second branch pipe 23 is connected to the positive pressure valve 41, and the sealing cap 24 is connected to the second end of the second branch pipe 23.

[0050] Specifically, the second branch tube 23 is used to add the medication into the first branch tube 22, and then introduce the medication into the catheter 21 and into the patient's body, which facilitates the addition of the medication. The sealing cap 24 can effectively protect the second branch tube 23.

[0051] In one embodiment of the protective indwelling needle of this utility model, in order to prevent the medicine from flowing out from the second end of the first branch tube 22, a sealing element 42 is also provided on the second end of the first branch tube 22.

[0052] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A protective indwelling needle, characterized in that, include: Puncture assembly, retention assembly, fixation assembly, and positive pressure assembly; The retention assembly includes a catheter and a first branch tube, the first branch tube being connected to the catheter; The puncture assembly includes a puncture needle, a needle hub, and a rotating seat. The two ends of the needle hub are connected to the puncture needle and the rotating seat, respectively. The catheter is sleeved outside the puncture needle. The length of the catheter is greater than the length of the puncture needle, and the sum of the lengths of the needle hub and the puncture needle is greater than the length of the catheter. In the unused state, one-third of the needle hub is threadedly connected to the catheter. The fixing component is disposed on the rotating seat and connected to the first branch pipe; The positive pressure component is used to prevent backflow of liquid within the conduit.

2. The indwelling needle with protective function according to claim 1, characterized in that, The outer peripheral wall of the needle hub is provided with external threads, and the inner wall of the conduit is provided with internal threads.

3. The indwelling needle with protective function according to claim 1, characterized in that, The puncture assembly also includes a rotating plate, which is connected to the outer peripheral wall of the rotating seat and is used to rotate the rotating seat.

4. The indwelling needle with protective function according to claim 1, characterized in that, The catheter is also covered with a protective sleeve, the inner diameter of which is larger than the outer diameter of the catheter, and the protective sleeve is slidably connected to the catheter.

5. The indwelling needle with protective function according to claim 1, characterized in that, The fixing component includes a fixing collar, a connecting rope, a first elastic band, and a second elastic band. The fixing collar is sleeved on the bottom of the rotating seat. The first end of the connecting rope is connected to the fixing collar, and the second end of the connecting rope is connected to the first end of the first elastic band and the first end of the second elastic band, respectively. The first elastic band and the second elastic band are wrapped around the first branch pipe, and the second end of the first elastic band is engaged with the second end of the second elastic band.

6. The indwelling needle with protective function according to claim 5, characterized in that, The second end of the first elastic band is provided with a plurality of snap-fit ​​blocks, and the second end of the second elastic band is provided with a plurality of snap-fit ​​interfaces, and the plurality of snap-fit ​​blocks are connected to the plurality of snap-fit ​​interfaces.

7. The indwelling needle with protective function according to claim 1, characterized in that, The positive pressure assembly includes a positive pressure valve, the first end of the first branch pipe is connected to the conduit, and the angle formed between the first branch pipe and the conduit is an acute angle, and the positive pressure valve is disposed at the second end of the first branch pipe.

8. The indwelling needle with protective function according to claim 7, characterized in that, The retention assembly also includes a second branch pipe and a sealing cap, wherein the first end of the second branch pipe is connected to the positive pressure valve, and the sealing cap is connected to the second end of the second branch pipe.

9. The indwelling needle with protective function according to claim 7, characterized in that, A sealing element is also provided at the second end of the first branch pipe.

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