Remaining needle with assembly structure

Abstract

The utility model discloses an assembly structure indwelling needle, which comprises a needle seat and a Y interface arranged at the left end of the needle seat, the left end of the Y interface is connected with a long catheter, the lower end of the long catheter is connected with a catheter connector, the catheter connector is communicated with the inside of the needle seat through the long catheter and the Y interface, the long catheter is sleeved with a painless dredging device, and the catheter connector is connected with the Y interface. The novel painless dredging device is additionally arranged outside the long catheter of the remaining needle, when the remaining needle is left on the back of the hand of a patient for a long time, the remaining needle head is prone to being blocked, at the moment, liquid medicine in the long catheter can be pushed into the remaining needle head through the painless dredging device, and then the blocked remaining needle head can be dredged; most importantly, when the painless dredging device dredges the indwelling needle, the liquid medicine in the long catheter can be pushed into the indwelling needle at a slow speed, and the situation that when the liquid medicine in the long catheter is pushed into the indwelling needle, the vein of a patient is injured due to the fact that the liquid medicine is pushed too fast and the pushing pressure is too large is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field related to indwelling needles, and particularly relates to an indwelling needle with an assembly structure. Background Technique

[0002] With the continuous progress of medical technology, indwelling needles, as an important medical device, play a key role in long-term infusion therapy and multiple infusion processes. The structures of traditional indwelling needles have some deficiencies in terms of complex operation, safety, and comfort. Therefore, it is particularly important to design a new type of indwelling needle with an assembly structure to solve these problems. The design concept of the new indwelling needle is to improve the operation convenience and safety during the indwelling process through an innovative assembly structure, and at the same time optimize the stability and effectiveness during the infusion process. This new type of indwelling needle with an assembly structure is not only applicable to conventional infusion therapy but also can meet the needs of special medical environments such as first aid and intensive care, providing a safer and more efficient operation experience for medical staff, and at the same time improving the overall treatment effect and comfort of patients. With the continuous progress of medical device technology, this new type of indwelling needle is expected to play an important role in clinical practice and provide reliable support and guarantee for the health treatment of patients.

[0003] However, indwelling needles are applicable to patients who need long-term infusion therapy. After the indwelling needle is inserted once, it can be used for a long time, reducing the number of times of repeated needle insertion, reducing the discomfort of patients and the risks related to puncture. However, after the indwelling needle is used for too long, it is easy to cause blockage inside the indwelling needle tip. To dredge the blockage inside the indwelling needle tip, doctors need to use a syringe to inject physiological saline into the long catheter so that the physiological saline flushes open the blockage inside the indwelling needle tip. However, when using a syringe to dredge the indwelling needle, it is easy to have a situation where the pushing speed of the physiological saline is too fast, which will cause pain or discomfort to the patient, especially if the operation is not careful or multiple attempts are required. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an indwelling needle with an assembly structure to solve the problem that when dredging the blockage inside the indwelling needle tip, doctors need to use a syringe to inject physiological saline into the long catheter so that the physiological saline flushes open the blockage inside the indwelling needle tip, but when using a syringe to dredge the indwelling needle, it is easy to have a situation where the pushing speed of the physiological saline is too fast, which will cause pain or discomfort to the patient as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: An indwelling needle with an assembly structure includes a needle hub and a Y-connector arranged at the left end of the needle hub. The left end of the Y-connector is connected to a long catheter. The lower end of the long catheter is connected to a catheter connector. The catheter connector is communicated with the inside of the needle hub through the long catheter and the Y-connector. A painless dredging device is sleeved outside the long catheter;

[0006] The painless dredging device includes anti-slip protrusions, a soft plastic frame, semi-circular extrusion heads, and catheter moving holes. Inside the centers of the upper and lower ends of the soft plastic frame, catheter moving holes are provided. Both of the catheter moving holes are sleeved outside a long catheter. On the inner walls of the left and right ends of the soft plastic frame, semi-circular extrusion heads are provided. The two semi-circular extrusion heads are respectively located on the left and right sides of the long catheter. On the outer walls of the left and right ends of the soft plastic frame, anti-slip protrusions are densely distributed. The anti-slip protrusions can increase the friction with the finger skin.

[0007] Preferably, the upper and lower ends of the soft plastic frame are both semi-circularly arranged. When the soft plastic frame is squeezed, both ends can generate deformation outward. The soft plastic frame can move up and down outside the long catheter through the catheter moving holes inside both ends.

[0008] Preferably, a positive pressure valve is provided at the bottom end of the catheter connector. A positive pressure valve cap is hermetically sleeved outside the opening of the positive pressure valve.

[0009] Preferably, an injection joint is provided at the right end of the catheter connector. A sealing end cap is hermetically sleeved outside the opening at the right end of the injection joint.

[0010] Preferably, a retention needle is provided at the top end of the needle seat. A needle orifice is provided at the bottom end of the needle seat. An isolation plug is further provided inside the needle seat, and the isolation plug is located below the Y interface.

[0011] Preferably, a handle end cap is sleeved outside the needle orifice. A steel needle is provided at the center of the top end of the handle end cap. The top end of the steel needle sequentially passes through the isolation plug, the needle seat, and the retention needle.

[0012] Preferably, a needle-holding handle is fixed to the right end of the handle end cap, and the needle-holding handle is located on the right side of the outer wall of the right end of the needle seat.

[0013] Compared with the prior art, the utility model provides a retention needle with an assembled structure, having the following

[0014] Beneficial effects:

[0015] The utility model adds a new painless dredging device outside the long catheter of the indwelling needle. When the painless dredging device is not stressed, it can slide flexibly outside the long catheter, so that it will not affect the normal flow of the liquid medicine in the long catheter, and further will not affect the normal delivery of the liquid medicine to the patient's vein. When the indwelling needle is indwelled in the patient's hand for a long time, it is easy to cause the indwelling needle head to be blocked. At this time, the painless dredging device can be used to push the liquid medicine in the long catheter into the indwelling needle head, so as to dredge the blocked indwelling needle head. The most important thing is that when the painless dredging device dredges the indwelling needle head, the liquid medicine in the long catheter can be slowly pushed into the indwelling needle head, and the situation that the liquid medicine in the long catheter is pushed into the indwelling needle head and harms the patient's vein due to too fast liquid medicine pushing speed and too large pushing pressure will not occur. Especially when the patient is a child, while the painless dredging device dredges the indwelling needle head, it will not cause damage and pain to the child's vein, and avoid harming the child's psychology or causing the child to have a resistant psychology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a schematic diagram of the overall planar structure of an indwelling needle with an assembled structure of the present utility model.

[0017] Figure 2 FIG. is a schematic diagram of a partial planar structure of an indwelling needle with an assembled structure of the present utility model.

[0018] Figure 3 FIG. is a schematic diagram of the planar structure of the painless dredging device of the present utility model.

[0019] Figure 4 FIG. is a schematic diagram of the three-dimensional structure of the painless dredging device of the present utility model.

[0020] In the figure: 1, positive pressure valve cap; 2, catheter connector; 3, sealing end cap; 4, injection connector; 5, long catheter; 6, painless dredging device; 7, Y-joint; 8, needle seat; 9, indwelling needle head; 10, needle holding handle; 11, handle end cap; 12, needle opening; 13, steel needle; 14, anti-slip protrusion; 15, soft plastic frame; 16, semi-circular extrusion head; 17, catheter moving hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model 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 of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] The present utility model provides as Figures 1-4An indwelling needle with an assembled structure as shown includes a needle hub 8 and a Y-connector 7 provided at the left end of the needle hub 8. A long catheter 5 is connected to the left end of the Y-connector 7. A catheter connector 2 is connected to the lower end of the long catheter 5. The catheter connector 2 is in internal communication with the needle hub 8 through the long catheter 5 and the Y-connector 7. A positive pressure valve is provided at the bottom end of the catheter connector 2. A positive pressure valve cap 1 is hermetically sleeved outside the opening of the positive pressure valve. An injection adapter 4 is provided at the right end of the catheter connector 2. A sealing end cap 3 is hermetically sleeved outside the opening at the right end of the injection adapter 4. A indwelling needle 9 is provided at the top end of the needle hub 8. A needle port 12 is provided at the bottom end of the needle hub 8. An isolation plug is also provided inside the needle hub 8 and is located below the Y-connector 7. A handle end cap 11 is sleeved outside the needle port 12. A steel needle 13 is provided at the center of the top end of the handle end cap 11. The top end of the steel needle 13 sequentially passes through the isolation plug, the needle hub 8, and the indwelling needle 9. A needle-holding handle 10 is fixed to the right end of the handle end cap 11, and the needle-holding handle 10 is located on the right side of the outer wall at the right end of the needle hub 8. When using this indwelling needle, first, it is necessary to disinfect the infusion vein on the back of the patient's hand. Then, it is necessary to remove the protective cover outside the indwelling needle 9. Then, the doctor needs to pinch the needle-holding handle 10 and press the indwelling needle 9 against the skin at the vein. At this time, it is necessary to ensure that the steel needle 13 passing through the indwelling needle 9 is aligned with the vein, and then accurately insert the steel needle 13 into the vein. The steel needle 13 will drive the indwelling needle 9 to be pushed into the vein. When the length of the indwelling needle 9 pushed into the vein reaches the requirement, it is necessary to use an anti-allergy adhesive tape to paste and fix the needle hub 8 on the skin outside the vein. When the needle hub 8 is paste-fixed, the indwelling needle 9 can be safely inserted into the patient's vein all the time. Then, it is necessary to withdraw the handle end cap 11 outside the needle port 12. Through the handle end cap 11, the steel needle 13 can be withdrawn to ensure that the indwelling needle 9 is in the state of being inserted into the vein. Then, use a sealing sleeve to seal the needle port 12, and then use adhesive tape to paste the catheter connector 2 on the skin to further fix the indwelling needle. During infusion, first, it is necessary to open the sealing end cap 3 outside the opening of the injection adapter 4, then disinfect the injection adapter 4, and then insert the infusion needle into the injection adapter 4. The infusion needle will transport the medicinal liquid through the catheter connector 2 and the injection adapter 4 to the long catheter 5. The long catheter 5 will transport the medicinal liquid through the Y-connector 7 and the needle hub 8 to the indwelling needle 9, and then the indwelling needle 9 will transport the medicinal liquid to the patient's vein to achieve the purpose of infusion.

[0023] Such as Figure 1 , Figure 3 and Figure 4As shown in the figure, a painless dredging device 6 is sleeved outside the long catheter 5. The painless dredging device 6 includes anti-slip protrusions 14, a soft plastic frame 15, semi-circular extrusion heads 16 and catheter moving holes 17. Catheter moving holes 17 are provided inside the centers of the upper and lower ends of the soft plastic frame 15. Both of the two catheter moving holes 17 are sleeved outside the long catheter 5. Semi-circular extrusion heads 16 are provided on the inner walls of the left and right ends of the soft plastic frame 15. The two semi-circular extrusion heads 16 are respectively located on the left and right sides of the long catheter 5. Anti-slip protrusions 14 are densely distributed on the outer walls of the left and right ends of the soft plastic frame 15. The anti-slip protrusions 14 can increase the friction force with the finger skin. The upper and lower ends of the soft plastic frame 15 are both semi-circularly arranged. When the soft plastic frame 15 is squeezed, both ends can deform outwards. The soft plastic frame 15 can move up and down outside the long catheter 5 through the catheter moving holes 17 inside both ends. When the indwelling needle is used for a long time, the indwelling needle head 9 is prone to blockage inside. At this time, the painless dredging device 6 can be used to dredge the blocked indwelling needle head 9 to ensure that the subsequent liquid medicine can be normally delivered to the patient's vein through the indwelling needle head 9. When specifically using the painless dredging device 6, the doctor needs to pinch the left and right ends of the soft plastic frame 15 with the thumb and index finger and then squeeze tightly. In this way, the semi-circular extrusion heads 16 on the inner walls of both ends of the soft plastic frame 15 will be squeezed towards the long catheter 5. In this way, the two semi-circular extrusion heads 16 will be clamped on the long catheter 5. Then maintain the squeezing state and push towards the indwelling needle direction. In this way, the liquid medicine in the long catheter 5 will be pushed towards the indwelling needle head 9 through the clamped semi-circular extrusion heads 16, so that the liquid medicine inside the long catheter 5 is slowly pushed into the indwelling needle head 9. In this way, the blocked part inside the indwelling needle head 9 will be dredged to ensure that the liquid medicine can be normally delivered to the patient's vein through the indwelling needle head 9.

[0024] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An indwelling needle with an assembled structure, comprising a needle hub (8) and a Y-connector (7) arranged at the left end of the needle hub (8). A long catheter (5) is connected to the left end of the Y-connector (7), and a catheter connector (2) is connected to the lower end of the long catheter (5). The catheter connector (2) is in internal communication with the needle hub (8) through the long catheter (5) and the Y-connector (7), and is characterized in that: The outer part of the long catheter (5) is sleeved with a painless dredging device (6); The painless dredging device (6) includes anti-slip protrusions (14), a soft plastic frame (15), semi-circular extrusion heads (16) and catheter moving holes (17). Catheter moving holes (17) are arranged inside the centers of the upper and lower ends of the soft plastic frame (15). Both of the two catheter moving holes (17) are sleeved on the outer part of the long catheter (5). Semi-circular extrusion heads (16) are arranged on the inner walls of the left and right ends of the soft plastic frame (15). The two semi-circular extrusion heads (16) are respectively located on the left and right sides of the long catheter (5). Anti-slip protrusions (14) are densely arranged on the outer walls of the left and right ends of the soft plastic frame (15). The anti-slip protrusions (14) can increase the friction with the finger skin.

2. The indwelling needle with an assembly structure according to claim 1, characterized in that: Both the upper and lower ends of the soft plastic frame (15) are semi-circularly arranged. When the soft plastic frame (15) is squeezed, both ends can generate deformation outwards. The soft plastic frame (15) can move up and down on the outer part of the long catheter (5) through the catheter moving holes (17) inside both ends.

3. The indwelling needle with an assembly structure according to claim 1, characterized in that: A positive pressure valve is arranged at the bottom end of the catheter connector (2). The outside of the opening of the positive pressure valve is hermetically sleeved with a positive pressure valve cap (1).

4. The indwelling needle with an assembly structure according to claim 3, characterized in that: An injection connector (4) is arranged at the right end of the catheter connector (2). The outside of the opening at the right end of the injection connector (4) is hermetically sleeved with a sealing end cap (3).

5. The indwelling needle with an assembly structure according to claim 1, characterized in that: A indwelling needle (9) is arranged at the top end of the needle holder (8). A needle opening (12) is arranged at the bottom end of the needle holder (8). An isolation plug is also arranged inside the needle holder (8), and the isolation plug is located below the Y connector (7).

6. The indwelling needle with an assembly structure according to claim 5, characterized in that: A handle end cap (11) is sleeved on the outside of the needle opening (12). A steel needle (13) is arranged at the center of the top end of the handle end cap (11). The top end of the steel needle (13) sequentially penetrates through the isolation plug, the needle holder (8) and the indwelling needle (9).

7. The indwelling needle with an assembly structure according to claim 6, characterized in that: A needle holding handle (10) is fixed to the right end of the handle end cap (11), and the needle holding handle (10) is located on the right side of the outer wall of the right end of the needle holder (8).

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