Dialysis remaining needle capable of preventing blood infection

Abstract

The utility model discloses a hemodialysis indwelling needle capable of preventing blood infection, which comprises an indwelling assembly and a needle puncture assembly, the indwelling assembly comprises a catheter, a catheter seat, a hose and a rubber plug seat which are sequentially connected from front to back, the needle puncture assembly comprises a needle tube and a needle seat, and the rear end of the rubber plug seat is movably sleeved at the front end of the needle seat; an anti-infection assembly is arranged in the needle base and comprises a fixing base, a protection film, a protection base and a protection piece, the fixing base is fixedly arranged in the needle base, the protection film is fixedly arranged at the front end of the fixing base, the other end of the protection film is fixedly connected with the protection base, the two ends of the protection base are in sliding connection with the needle tube, and the elastic protection piece is arranged in the protection base. One end of the protection sheet is fixedly connected with the rear end and the right side wall of the protection seat, and the other end of the protection sheet penetrates through the needle tube and abuts against the side face of the needle tube. The anti-infection syringe ensures that the needle tip and the needle tube wall are completely covered in the anti-infection assembly and cannot fall off, ensures the life safety of medical staff, and plays a role in preventing blood spread disease infection.

Description

Technical Field

[0001] The utility model belongs to the technical field of indwelling needles, in particular to an indwelling needle for dialysis with a function of preventing blood infection. Background Art

[0002] An indwelling needle is composed of a stainless steel core, a soft outer sleeve, and a plastic needle holder. During puncture, the outer sleeve and the needle core are inserted into the blood vessel together. After the sleeve is inserted into the blood vessel, the needle core is pulled out, leaving only the soft outer sleeve in the blood vessel for infusion. During blood purification treatment, dialysis indwelling needles are mainly used for clinical arteriovenous puncture to establish blood channels and perform hemodialysis on patients. At the same time, it can avoid blood vessel damage caused by multiple punctures, which not only relieves the patient's pain, but also helps to reduce the operating intensity of nurses. Existing dialysis indwelling needles need to withdraw the steel needle after the puncture is completed. The steel needle is completely exposed to the outside. The needle tip and the bloody needle wall are both sources of risk for blood-borne diseases. Medical staff may accidentally infect themselves with blood. If the patient is a hepatitis B or AIDS patient, it may cause medical staff to be infected with hepatitis B or AIDS, thereby causing serious physical harm and threatening their life safety. Utility Model Content

[0003] Based on the above background, the purpose of the present invention is to provide a dialysis indwelling needle with a blood infection prevention function to solve the problem that the clinical dialysis indwelling needle lacks protective measures after puncture and withdrawal, which can easily injure people and cause blood infection.

[0004] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0005] A dialysis indwelling needle with a blood infection prevention function includes an indwelling assembly and a needle puncture assembly. The indwelling assembly includes a catheter, a catheter seat, a hose, and a plug seat connected in sequence from front to back, and a plug is provided in the plug seat; the needle puncture assembly includes a needle tube and a needle seat. One end of the needle tube is fixed in the needle seat and extends out of the rear end of the needle seat, and the other end passes through the needle seat, the plug, the plug seat, the hose, the catheter seat, and the catheter in sequence and extends out of the catheter. The rear end of the plug seat is movably sleeved on the front end of the needle seat.

[0006] An anti-infection component is provided in the needle seat, and the anti-infection component includes a fixing seat, a protective film, a protective seat and a protective sheet. The fixing seat is fixed in the needle seat, and the front end of the fixing seat is connected to the protective film, and the other end of the protective film is fixedly connected to the protective seat. The protective film is curled up in the needle seat before use and unfolded to cover the needle tube after use. The two ends of the protective seat are sleeved on the outside of the needle tube and are slidably connected to the needle tube. The protective seat is slidably connected to the needle seat, and an elastic protective sheet is provided in the protective seat. One end of the protective sheet is fixedly connected to the rear end and right side wall of the protective seat, and the other end passes through the needle tube and contacts the side of the needle tube. The protective sheet is clamped with the rubber plug seat.

[0007] Preferably, a retaining seat is provided in the plug seat, the retaining seat is provided on a side of the plug away from the catheter, and a notch is provided on the retaining seat;

[0008] A protrusion is provided at the front end of the protection sheet, and the protrusion is engaged with the notch.

[0009] Preferably, the portion where the protective sheet contacts the needle tube is in a broken line shape, and can cover the needle tip of the needle tube after the anti-infection component is activated.

[0010] Preferably, an exhaust seat is provided at the rear end of the needle seat, an exhaust plug is inserted into the exhaust seat, and the rear end of the needle tube extends out of the needle seat and is connected to the exhaust seat to protect the needle tube from being contaminated before use;

[0011] A hose seat is connected between the hose and the rubber plug seat to stabilize the hose.

[0012] Preferably, a needle wing is provided on the outside of the catheter seat, which facilitates the operator to press the needle wing to stabilize the catheter seat when the needle tube is withdrawn;

[0013] One end of the catheter extending into the catheter seat is connected to a funnel, and the outer side of the funnel is in contact with the inner side of the catheter seat.

[0014] Preferably, the front end of the protective seat is provided with a first through hole, the rear end of the protective sheet through which the needle tube passes is provided with a second through hole, and the diameter of the first through hole is larger than that of the second through hole;

[0015] A flattening block is provided at the front end of the needle tube, and the flattening block can pass through the first through hole and abut against the second through hole, thereby ensuring that the needle tip will not exit the anti-infection component even if the needle tube continues to move, and completely ensuring that the needle tip and the needle tube wall are completely covered in the anti-infection component and will not fall out.

[0016] Preferably, a needle cap is provided on the outer side of the catheter seat, and one end of the needle cap is engaged with the catheter seat to protect the catheter and the needle tube.

[0017] Preferably, the protective film is made of medical-grade plastic.

[0018] The utility model has the following beneficial effects:

[0019] 1. The anti-infection component provided in the present invention allows the needle to slide relative to the protective seat and the protective sheet during the process of the needle completing the puncture and exiting the retention component. The anti-infection component is activated due to the snap-fit ​​connection between the protective sheet and the slot. When the needle is pulled out, the protective film is unfolded to wrap around the needle. When the needle tip slides into the protective seat, the protective sheet is disengaged from the side wall of the needle and thus covers the needle tip. The protective sheet closes and the protrusion quickly detaches from the slot, thereby achieving the detachment of the anti-infection component from the retention component, which has the beneficial effects of safety protection, ease of use and reliability.

[0020] 2. The utility model is provided with a flattening block on the needle tube. Through the interference cooperation between the flattening block and the second through hole, after the needle tube is withdrawn into the protective seat and the needle tip of the needle tube is sleeved inside the protective sheet, it is ensured that the needle tip will not withdraw from the anti-infection component even if the needle tube continues to move. It is completely guaranteed that the needle tip and the needle tube wall are completely covered in the anti-infection component and will not fall out. The clinical operation is simple and convenient, which ensures the life safety of medical staff and plays a role in preventing infection of blood-borne diseases. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0022] Figure 1 This is a schematic diagram of the front structure of the utility model;

[0023] Figure 2 This is a schematic structural diagram of the retention component of the present utility model;

[0024] Figure 3 This is a schematic structural diagram of the needle puncture assembly and the anti-infection assembly of the present invention before activation of the anti-infection assembly;

[0025] Figure 4 This is a schematic structural diagram of the needle puncture assembly and the anti-infection assembly of the utility model after the anti-infection assembly is activated;

[0026] Figure 5 This is a schematic structural diagram of the anti-infection component of the present invention.

[0027] Wherein: 1. Indwelling assembly; 11. Catheter; 12. Catheter seat; 13. Hose; 14. Rubber plug seat; 15. Rubber plug; 16. Hose seat; 17. Needle wing; 18. Funnel; 19. Clamping seat; 110. Notch;

[0028] 2. Needle puncture assembly; 21. Needle tube; 22. Needle seat; 23. Exhaust plug; 24. Exhaust seat; 25. Flattening block;

[0029] 3. Anti-infection component; 31. Fixing seat; 32. Protective film; 33. Protective seat; 34. Protective sheet; 35. Protrusion; 36. First through hole; 37. Second through hole;

[0030] 4. Needle cap. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, in this utility model, the descriptions of "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0034] like Figure 1-5As shown, a dialysis indwelling needle with a blood infection prevention function includes an indwelling component 1 and a needle puncture component 2, wherein the indwelling component 1 is used to establish a blood channel to facilitate later dialysis, and the needle puncture component 2 is used to assist the indwelling component 1 in establishing a blood channel. The indwelling component 1 includes a catheter 11, a catheter seat 12, a hose 13 and a plug seat 14 connected in sequence from front to back. The catheter 11 is left in the blood vessel to establish a channel between the catheter 11 and the catheter seat 12. The hose 13 and the plug seat 14 are used to connect with external equipment during dialysis. A plug 15 is provided in the plug seat 14 to seal the indwelling component 1 to avoid infection. The rear end of the plug seat 14 is movably connected to the front end of the needle seat 22. The acupuncture component includes a needle tube 21 and a needle seat 22. The needle seat 22 is in the middle. The hollow structure has an anti-infection component 3 inside. The anti-infection component 3 covers the needle tube 21 after the acupuncture component exits the blood vessel to prevent medical personnel from being stabbed. One end of the needle tube 21 is fixed to the needle seat 22 and the end extends out of the rear end of the needle seat 22 to maintain the circulation inside the entire needle tube 21. The other end of the needle tube 21 passes through the anti-infection component 3, the other end of the needle seat 22, the rubber plug 15, the rubber plug seat 14, the hose 13, the catheter seat 12 and the catheter 11 in sequence, and the needle tip of the needle tube 21 extends out of the catheter 11.

[0035] The anti-infection component 3 includes a fixing seat 31, a protective film 32, a protective seat 33 and a protective sheet 34. The fixing seat 31 is fixedly arranged inside the needle seat 22. The front end of the fixing seat 31 is connected to the protective film 32. The protective film 32 is made of medical-grade plastic material, which is safe. The protective film 32 is wrapped around the outside of the needle tube 21 and is curled up in the needle seat 22. The other end of the protective film 32 is fixedly connected to the protective seat 33. When the protective seat 33 is activated and slides along the needle tube 21, the protective film 32 is stretched out and wrapped around the outside of the needle tube 21 to play an isolation role. The needle tube 21 passes through the two ends of the protective seat 33. The protective seat 33 is slidably connected to the needle seat 22. The protective seat 33 can be inserted into the needle tube 21 slides on the protective seat 33, and an elastic protective sheet 34 is provided in the protective seat 33. The rear end of the protective sheet 34 is fixedly connected to the rear end and right side wall of the inner side of the protective seat 33, and the other end passes through the needle tube 21 and conflicts with the side wall of the needle tube 21. A protrusion 35 is provided at the front end of the protective sheet 34, and the part that conflicts with the needle tube 21 is in a broken line shape. After activation, it slides along the needle tube 21 to the needle tip. After losing the resistance of the side of the needle tube 21, it can fall and cover the needle tip due to the elastic action. A locking seat 19 is provided in the plug seat 14. The locking seat 19 is provided on the side of the plug 15 away from the catheter 11. A notch 110 is provided on the locking seat 19, and the protrusion 35 of the protective sheet 34 is engaged with the notch 110.

[0036] During use, after the needle tube 21 completes puncture, the needle seat 22 is pulled to drive the needle tube 21 to withdraw from the retention component 1. Due to the engagement of the protrusion 35 and the slot 110, the anti-infection component 3 is activated, and the protective seat 33 and the protective sheet 34 remain stationary and slide out of the needle seat 22. During the movement of the needle seat 22, the protective film 32 is unfolded to cover the outside of the needle tube 21. When it moves to the needle tip, the protective sheet 34 loses the resistance of the side of the needle tube 21 and can fall down due to elasticity to cover the needle tip. At the same time, after the protective sheet 34 falls, the protrusion 35 disengages from the slot 110, and the anti-infection component 3 disengages from the retention component 1, which can ensure that the anti-infection component 3 will not disengage before the needle tube 21 is completely covered, thereby ensuring the life safety of medical staff.

[0037] Preferably, an exhaust seat 24 is provided at the rear end of the needle seat 22, and an exhaust plug 23 is movably inserted in the exhaust seat 24. The rear end of the needle tube 21 extends out of the needle seat 22 and is connected to the exhaust seat 24. The exhaust plug 23 is pulled out before use to ensure air circulation inside the needle tube 21, which facilitates the acupuncture process. The provision of the exhaust plug 23 can ensure that the needle tube 21 will not be contaminated before use.

[0038] Preferably, a hose seat 16 is connected between the hose 13 and the plug seat 14, which can improve the stability of the connection of the hose 13. There is a needle wing 17 on the outside of the catheter seat 12, and there are two needle wings 17. Penetration holes are provided on both sides of the needle wing 17, which can improve the friction of the needle wing 17. When the needle tube 21 withdraws from the retention assembly 1, pressing the needle wing 17 can improve the stability of the retention assembly 1. The end of the catheter 11 extending into the catheter seat 12 is connected to a funnel 18, and the side of the funnel 18 is closed and connected to the inner side of the catheter seat 12, which better improves the connectivity between the catheter 11 and the needle tube 21 seat, and avoids drug residue at the bottom of the needle tube 21 seat during use.

[0039] Preferably, a first through hole 36 is provided at the front end of the protective seat 33, and a second through hole 37 is provided at the rear end of the protective sheet 34 through which the needle tube 21 passes. The diameter of the first through hole 36 is larger than that of the second through hole 37; a flattening block 25 is provided at the front end of the needle tube 21, and the flattening block 25 can pass through the first through hole 36 and abut against the second through hole 37. In the process of the needle tube 21 withdrawing from the retention component 1, the flattening block 25 is blocked by the second through hole 37, thereby ensuring that the needle tip of the needle tube 21 will not slide out of the protective seat 33, and the needle tip will eventually be sheathed inside the protective sheet 34, and will not pierce the protective film 32 and accidentally injure medical staff, thereby completely ensuring that the needle tip and the needle tube 21 are completely covered in the anti-infection component 3 and will not fall out.

[0040] Preferably, a needle cap 4 is provided on the outside of the catheter hub 12 , and one end of the needle cap 4 is engaged with the catheter hub 12 to protect the acupuncture assembly and the indwelling assembly 1 from being contaminated before use.

[0041] The working principle of the present invention is as follows: when the needle tube 21 completes the puncture, the needle seat 22 is pulled to drive the needle tube 21 out of the retention component 1, and the anti-infection component 3 is activated due to the engagement of the protrusion 35 and the notch 110. The protective seat 33 and the protective sheet 34 remain stationary and slide out of the needle seat 22. During the movement of the needle seat 22, the protective film 32 is unfolded to cover the outside of the needle tube 21. When it moves to the needle tip, the protective sheet 34 loses the resistance of the side of the needle tube 21 and can fall down due to the elastic action to cover the needle tip, while protecting After the sheet 34 falls, the protrusion 35 disengages from the notch 110. Since the flattening block 25 is blocked by the second through hole 37, the needle seat 22 and the needle tube 21 continue to move. The needle tube 21 drives the protective seat 33 and the protective sheet 34 to disengage from the blocking seat 19, and the anti-infection component 3 is disengaged from the retention component 1, ensuring that the needle tip of the needle tube 21 will not slide out of the protective seat 33. The needle tip is finally sheathed inside the protective sheet 34 and will not pierce the protective film 32 to accidentally injure medical staff, which completely ensures that the needle tip and the needle tube 21 are completely covered in the anti-infection component 3 and will not fall out.

[0042] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A dialysis indwelling needle with a blood infection prevention function, characterized in that: It includes a retention assembly and a needle puncture assembly, the retention assembly includes a catheter, a catheter seat, a hose and a plug seat connected in sequence from front to back, and a plug is provided in the plug seat; the needle puncture assembly includes a needle tube and a needle seat, one end of the needle tube is fixed in the needle seat and the end extends out of the rear end of the needle seat, and the other end passes through the needle seat, the plug, the plug seat, the hose, the catheter seat and the catheter in sequence and the end extends out of the catheter, and the rear end of the plug seat is movably sleeved on the front end of the needle seat; An anti-infection component is provided in the needle seat, and the anti-infection component includes a fixing seat, a protective film, a protective seat and a protective sheet. The fixing seat is fixed in the needle seat, and the front end of the fixing seat is connected to the protective film, and the other end of the protective film is fixedly connected to the protective seat. The protective film is curled up in the needle seat before use and unfolded to cover the needle tube after use. Both ends of the protective seat are sleeved on the outside of the needle tube and are slidably connected to the needle tube. An elastic protective sheet is provided in the protective seat, one end of the protective sheet is fixedly connected to the rear end and right side wall of the protective seat, and the other end passes through the needle tube and contacts the side of the needle tube, and the protective sheet is clamped with the rubber plug seat.

2. The dialysis indwelling needle with blood infection prevention according to claim 1, characterized in that: A retaining seat is provided in the rubber plug seat, the retaining seat is provided on the side of the rubber plug away from the catheter, and a notch is provided on the retaining seat; A protrusion is provided at the front end of the protection sheet, and the protrusion is engaged with the notch.

3. The dialysis indwelling needle with blood infection prevention according to claim 1, characterized in that: The portion where the protective sheet contacts the needle tube is in a broken line shape, and can cover the needle tip of the needle tube after the anti-infection component is activated.

4. The dialysis indwelling needle with blood infection prevention according to claim 1, characterized in that: The rear end of the needle seat is provided with an exhaust seat, in which an exhaust plug is inserted, and the rear end of the needle tube extends out of the needle seat and is communicated with the exhaust seat.

5. The dialysis indwelling needle with blood infection prevention function according to claim 1, characterized in that: The outer side of the catheter seat is provided with a needle wing; One end of the catheter extending into the catheter seat is connected to a funnel, and the outer side of the funnel is in contact with the inner side of the catheter seat; A hose seat is connected between the hose and the rubber plug seat.

6. The dialysis indwelling needle with blood infection prevention function according to claim 1, characterized in that: The front end of the protective seat is provided with a first through hole, and the rear end of the protective sheet through which the needle tube passes is provided with a second through hole, wherein the diameter of the first through hole is larger than that of the second through hole; A flattening block is provided at the front end of the needle tube, and the flattening block can pass through the first through hole and abut against the second through hole.

7. The dialysis indwelling needle with blood infection prevention function according to any one of claims 1 to 6, characterized in that: A needle cap is sleeved on the outer side of the catheter seat, and one end of the needle cap is clamped with the catheter seat.

8. The dialysis indwelling needle with blood infection prevention function according to claim 7, characterized in that: The protective film is made of medical-grade plastic.

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