Dialysis remaining needle

Abstract

The dialysis remaining needle comprises a puncture needle tube assembly and a remaining catheter assembly, the puncture needle tube assembly comprises a needle seat, a puncture needle arranged at the front end of the needle seat and an exhaust connector arranged at the rear end of the needle seat, and an insertion hole communicated with the puncture needle is formed in the rear end of the needle seat; through holes are formed in the two ends of the exhaust connector in a penetrating mode, exhaust holes are formed in the two ends of the exhaust connector, the front end of the exhaust connector is provided with an insertion part which can be inserted into the insertion hole to achieve connection, and the end of the insertion part is provided with a water-blocking breathable film capable of achieving water blocking and breathability. The dialysis remaining needle is compact in structure, low in manufacturing cost and good in using effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to a remaining needle, especially a dialysis remaining needle. BACKGROUND

[0002] Hemodialysis is the main treatment method for maintaining life of end-stage renal patients, and the patients need to perform hemodialysis two to three times a week, when performing hemodialysis, two thick steel needles are inserted into the arteriovenous of the patients to establish a hemodialysis channel, and then connected with a hemodialysis instrument to realize hemodialysis; in order to reduce the pain of the patients, the remaining needle is used in the prior art, and the needle tube is reserved on the patients to reduce the needle puncture times of the patients.

[0003] In clinic, the remaining needle for dialysis is used for vascular puncture and connected with a blood circuit to perform hemodialysis, and an exhaust component is arranged on the product to exhaust air, the air permeable film of the existing dialysis remaining needle is arranged in the recessed hole of the exhaust component, which is inconvenient to install and increases the process difficulty and cost; meanwhile, the existing dialysis remaining needle is adhered to the surface of the human body by the adhesive tape, the fixing effect is not ideal, the comfort is poor, and displacement and falling off are prone to occur. UTILITY MODEL CONTENT

[0004] TECHNICAL PROBLEM TO BE SOLVED

[0005] The utility model wants to solve the technical problem to provide a dialysis remaining needle which is compact in structure, convenient to manufacture, good in exhaust effect, easy to operate and fixed.

[0006] TECHNICAL SCHEME FOR SOLVING PROBLEM

[0007] The utility model provides a dialysis remaining needle, it includes puncture needle tube subassembly 1 and remaining catheter subassembly 2, puncture needle tube subassembly 1 includes needle seat 12, sets up puncture needle 14 at the front end of needle seat 12 and sets up exhaust joint 13 at the rear end of needle seat 12, the rear end of needle seat 12 is set up with the insertion hole 120 of puncture needle 14 intercommunication, the both ends of exhaust joint 13 are penetrated with through -hole and form exhaust hole 130, the front end of exhaust joint 13 is equipped with the splicing part of being able to insert insertion hole 120 and realizes the connection, the end of splicing part is equipped with the water -resistant and air -permeable membrane 15 that can realize water -resistant and air -permeable.

[0008] Further, the end of the splicing part is provided with an annular protrusion 131, and the water-resistant and air-permeable membrane 15 is arranged at the end of the annular protrusion 131.

[0009] Further, the water-resistant and air-permeable membrane 15 is fixed at the end of the splicing part by ultrasonic welding.

[0010] Further, the cross section of the insertion hole 120 and the splicing part is circular, and the side wall thereof is inclined.

[0011] Further, the angle between the side wall of the insertion hole 120 and the axis of the puncture needle 14 is greater than or equal to 1° and less than or equal to 2.5°.

[0012] Further, the indwelling catheter assembly 2 comprises a catheter seat 24, a catheter 25 arranged at the front end of the catheter seat 24, a connecting pipe 23 arranged at the rear end of the catheter seat 24, and a connecting head 21 arranged at the end of the connecting pipe 23, wherein the connecting head 21 is provided with a sealing plug 26, the outer wall of the connecting head 21 is provided with a limiting protrusion 211, the front end of the needle seat 12 is provided with a sleeve 11 capable of inserting the end of the connecting head 21, and the inner wall of the sleeve 11 is provided with a limiting groove capable of clamping the limiting protrusion 211 and achieving detachable connection.

[0013] Further, the limiting protrusion 211 is annular and its cross section is arc-shaped.

[0014] Further, the side wall of the catheter seat 24 is provided with a sheet-shaped and elastic side wing 3, the side wing 3 is symmetrically arranged at both sides of the catheter seat 24, and the side wing 3 has a fitting surface capable of fitting the human body.

[0015] Further, the side wall of the catheter seat 24 is provided with an annular groove 241, the side wing 3 comprises a cylindrical sleeve 31 capable of being sleeved into the annular groove 241, the side wall of the sleeve 31 is symmetrically provided with two sheet-shaped side wing bodies 32, and the bottom surface of the side wing body 32 forms the fitting surface.

[0016] Further, the side wing 3 is made of soft rubber.

[0017] Further, the sleeve is rotatably sleeved in the annular groove and can realize angle adjustment of the side wing.

[0018] Further, the upper surface of the side wing is provided with anti-slip lines 321.

[0019] Further, the connecting pipe 23 is provided with a flow-stopping clamp 4.

[0020] Further, the side wing 3 is provided with color or pattern identification.

[0021] Beneficial effects

[0022] The utility model discloses dialysis indwelling needle, to exhaust structure carries out optimization design, it is convenient for the installation of water -resisting and air -permeable membrane, has reduced production process difficulty and manufacturing cost, and installation reliability is high, forms built -in structure, and use effect is good, and safety is high, set up annular convex structure, as the installation carrier of air -permeable membrane, it is convenient for welding fixed, improved assembly accuracy and connection reliability, double sealing plug structure sets up, realizes double sealing, and the leakproofness is good, set up side wing structure, can provide good comfort after indwelling needle insertion, and it is convenient to fix, can stabilize the position of indwelling needle, avoids the situation of displacement or falling off in the use process, and use comfort and stability are good, through setting up different colors, can quickly, accurately discern indwelling needle type, specification etc., the utility model discloses dialysis indwelling needle, compact structure, low manufacturing cost, good use effect. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the structure schematic drawing of dialysis indwelling needle of the utility model,

[0024] Figure 2 It is the explosion structure schematic drawing of dialysis indwinging needle of the utility model,

[0025] Figure 3 It is the section view of dialysis indwinging needle of the utility model,

[0026] Figure 4 It is Figure 3 The enlarged view of A part in,

[0027] Figure 5 It is Figure 3 The enlarged view of B part in,

[0028] Figure 6 It is the structure schematic drawing of indwelling catheter subassembly of dialysis indwinging needle of the utility model,

[0029] Figure 7 It is the structure schematic drawing of puncture needle tube subassembly of dialysis indwinging needle of the utility model,

[0030] Figure 8 It is the installation schematic drawing of side wing of dialysis indwinging needle of the utility model,

[0031] Figure 9 It is the structure schematic drawing of side wing of dialysis indwinging needle of the utility model,

[0032] Figure 10 It is the structure schematic drawing of catheter seat of dialysis indwinging needle of the utility model,

[0033] Figure 11 It is the installation schematic drawing of flow stop clamp of dialysis indwinging needle of the utility model,

[0034] Figure 12This is a schematic diagram of the flow-stopping clip for the dialysis indwelling needle of this utility model. Detailed Implementation

[0035] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0036] See Figures 1-12 This utility model provides a dialysis indwelling needle, which includes a puncture needle assembly 1 and an indwelling catheter assembly 2. The puncture needle assembly 1 includes a needle hub 12, a puncture needle 14, and an exhaust connector 13. The puncture needle 14 is fixed to the front end of the needle hub 12, and the exhaust connector 13 is installed at the rear end of the needle hub 12. The needle hub 12, the puncture needle 14, and the exhaust connector 13 are coaxially arranged. The puncture needle 14 is sleeved inside the indwelling catheter assembly 2, and the tip of the puncture needle 14 extends outside the indwelling catheter assembly 2 for vascular puncture. The needle hub 12 is cylindrical in shape and made of transparent material. An insertion hole 120 is provided at the rear end of the needle hub 12, which communicates with the puncture needle 14. The exhaust connector 13 is cylindrical in shape, with through holes at both ends forming exhaust holes 130. At the same time, a plug-in part is provided at the front end of the exhaust connector 13, which can be inserted into the insertion hole 120 to achieve connection with the needle hub 12. In this application, the cross-section of the insertion hole 120 and the insertion part is circular, and its sidewalls are inclined, that is, both the insertion hole 120 and the insertion part are conical, and the inclination of their sidewalls is the same. In this embodiment, the included angle between the sidewall of the insertion hole 120 and the insertion part and the axis of the puncture needle 14 is greater than or equal to 1° and less than or equal to 2.5°, which has a centering function and improves assembly accuracy and efficiency. A water-blocking and air-permeable membrane 15 is provided at the end of the insertion part. The water-blocking and air-permeable membrane 15 is circular and is fixed to the end of the insertion part by ultrasonic welding. The water-blocking and air-permeable membrane 15 has the function of blocking water and permeating air. This water-blocking and air-permeable design can ensure good ventilation inside the indwelling needle, allowing air or gas to pass through, thereby maintaining a breathable environment, helping to reduce the accumulation of humidity and heat around the indwelling needle, providing a more comfortable user experience, and also effectively preventing bacteria, dust and other contaminants from entering the inside of the indwelling needle, reducing the risk of infection; see reference Figure 4In order to facilitate the welding of the waterproof and breathable membrane, the end of the insertion part is provided with an annular protrusion 131, which is coaxial with the exhaust hole 130. The outer wall of the annular protrusion has a gap with the inner wall of the insertion hole 120, forming a stepped structure. At the same time, the end face of the annular protrusion 131 is a flat surface, forming a mounting surface. The waterproof and breathable membrane 15 is attached to the lower end face of the annular protrusion 131 and is fixed by welding. In this application, the diameter of the waterproof and breathable membrane 15 is slightly larger than the outer diameter of the annular protrusion 131, which can increase the contact area between the two and improve the connection reliability and stability. There is a gap between the end face of the annular protrusion 131 and the bottom surface of the insertion hole 120. Therefore, there is also a gap between the waterproof and breathable membrane 15 at the end of the annular protrusion 131 and the bottom surface of the insertion hole 120, which avoids direct contact and affects or damages the waterproof and breathable membrane. The waterproof and breathable membrane is built into the needle holder, improving the safety of use.

[0037] The indwelling catheter assembly 2 comprises a catheter seat 24, a catheter 25, a connecting tube 23 and a connecting head 21. The catheter 25 is arranged at the front end of the catheter seat 24. The catheter has a small diameter, which is slightly larger than the outer diameter of the puncture needle 14. The puncture needle passes through the indwelling catheter assembly 2 from top to bottom, and the needle tip extends outside the catheter 25 for puncture. After puncture, the catheter 25 remains in the blood vessel, i.e. indwelling. The catheter 25 is a flexible tube, which does not cause discomfort and does not affect the normal activities of the patient when indwelling in the blood vessel. The connecting tube 23 is a transparent and flexible tube structure, which has a size larger than the catheter and is used for delivering liquid medicine, etc. A plastic connecting tube sleeve 22 is fixed at the end of the connecting tube 23. The connecting head 21 is threadedly connected to the end of the connecting tube sleeve 22, realizing detachable connection and facilitating assembly. A sealing plug 26 is arranged in the connecting head 21. A limiting protrusion 211 is arranged on the outer wall of the connecting head 21. For details, refer to Figure 5A cylindrical protrusion is arranged at the end of the connector 21, and a recess is arranged at the end face of the cylindrical protrusion. The sealing plug 26 is arranged in the recess. In the present application, the sealing plug 26 comprises a lower cylindrical sealing plug 262 and an upper sealing plug 261. The inner walls of the upper sealing plug 261 and the lower sealing plug 262 are in interference fit in the recess, thereby achieving fixed connection. A hole structure is arranged on the opposite faces of the upper sealing plug 261 and the lower sealing plug 262, thereby forming an opening structure arranged oppositely. A sealing cavity structure is formed between the oppositely arranged upper sealing plug 261 and lower sealing plug 262. The puncture needle can pass through the upper sealing plug 261, the sealing cavity and the lower sealing plug 262 in sequence from top to bottom, thereby achieving multiple sealing and good sealing performance. Meanwhile, the effective thickness of the sealing plug is reduced, the elasticity is increased, and the assembly is facilitated. The diameter of the cylindrical protrusion is smaller than the outer diameter of the connector, thereby forming a step structure. A limiting protrusion 211 is arranged on the outer wall of the cylindrical protrusion. The limiting protrusion 211 is annular, and the cross section thereof is arc-shaped. Meanwhile, a sleeve 11 is arranged at the front end of the needle seat 12. The sleeve 11 is cylindrical, and the lower end thereof is open. The inner diameter of the sleeve is substantially the same as the outer diameter of the cylindrical protrusion, and the sleeve can be sleeved on the cylindrical protrusion, i.e., the end portion (cylindrical protrusion) of the connector 21 can be inserted. An annular limiting groove is arranged on the inner wall of the sleeve 11. The limiting groove can accommodate the limiting protrusion 211, thereby achieving detachable connection between the sleeve 11 and the connector 21. During assembly, the sleeve 11 is inserted into the end portion of the connector 21 and the cylindrical protrusion, and the limiting protrusion 211 on the side of the cylindrical protrusion is clamped into the limiting groove on the inner wall of the sleeve, thereby achieving fixed connection. After puncture is completed, the sleeve 11 is pulled upward, and the needle seat is separated from the connector, thereby achieving separation between the puncture needle tube assembly 1 and the indwelling catheter assembly 2. The limiting protrusion and the limiting groove form damping, thereby achieving quick assembly and disassembly.

[0038] In another embodiment of the present application, a wing is further arranged. Referring to Figures 8-10By setting the side wings, it is convenient for medical staff to perform puncture operation, and meanwhile it is convenient for overall fixation. Specifically, a sheet-shaped side wing 3 is arranged on the side wall of the catheter seat 24, the side wing 3 has elasticity and is made of soft rubber, the side wing 3 is two and is symmetrically arranged on the two sides of the catheter seat 24, and the side wing 3 has an adhering surface which can adhere to the human body, so as to facilitate fixation. In order to facilitate manufacturing and assembly, an annular groove 241 is arranged on the side wall of the catheter seat 24, the side wing 3 comprises a cylindrical sleeve 31 which is sleeved into the annular groove 241 to realize connection of the two, two sheet-shaped side wing bodies 32 are symmetrically arranged on the side wall of the sleeve 31, and the bottom surface of the side wing body 32 forms the adhering surface. The sleeve and the side wing body are integrally formed by injection molding and are made of flexible material such as rubber. The catheter seat 24 and the side wing can be assembled by assembly or can be formed by twice injection molding. In the application, the sleeve 31 is rotatably sleeved in the annular groove 241, that is, radial rotation is realized, the angle of the side wing can be adjusted, and then appropriate angle is selected when puncture and fixation are convenient, so that adhesion and comfort are improved. In order to facilitate operation and prevent slipping, anti-skid lines 321 are arranged on the upper surface of the side wing, so as to facilitate handheld operation. Meanwhile, in order to facilitate distinction of different types of puncture needles, the side wing can adopt different colors or different color or pattern marks are arranged on the side wing, so that the type and specification of the indwelling needle can be quickly and accurately distinguished.

[0039] By setting the above side wing, good comfort can be provided after the indwelling needle is inserted, the adhesive type, clamping type or other innovative fixation mode can be adopted, the position of the indwinding needle is stabilized, displacement or falling off in the use process is avoided, and use comfort and stability are good. The material of the soft wing has good flexibility and comfort, and at the same time needs to meet the hygiene standard of medical devices and has biocompatibility, so as not to cause allergy or stimulate the skin of the patient and use comfort. The design of the soft wing can consider adding some visual design elements such as color, so that the position and specification of the indwinding needle are more easily observed and positioned by medical staff in the use process. The operation convenience of the indwinding needle is improved, for example, the rotation design is easy to operate, and the operation efficiency of medical staff is improved. By setting the flexible side wing, accidental injury or infection risk can be avoided, and the indwinding needle is prevented from sliding or displacing in the use process, and use safety is high.

[0040] In another embodiment of the application, a flow-stopping clamp 4 is arranged on the connecting pipe 23, as shown in Figures 11-12The first clamping arm 42 and the second clamping arm 41 are provided with first through holes 401 and second through holes 400 respectively on the opposite sides of the first clamping arm 42 and the second clamping arm 41, and the first clamping arm 42 and the second clamping arm 41 are provided with first extrusion parts 421 and second extrusion parts 411 respectively on the opposite surfaces of the first clamping arm 42 and the second clamping arm 41, the extrusion parts are strip-shaped and the length direction of the extrusion parts is perpendicular to the penetrating direction of the connecting pipe, when the first clamping arm 42 and the second clamping arm 41 are close and clamped, the two extrusion parts are pressed and extruded on the connecting pipe, and then the communication of the connecting pipe is blocked to form the flow stopping; the end of the first clamping arm 42 is provided with a buckle part 421, and the end of the second clamping arm 41 has a certain arc to produce elastic deformation, and the end of the second clamping arm 41 is provided with a clamping groove 413, the clamping groove 413 can accommodate the buckle part 421 to clamp and fix the first clamping arm 42 and the second clamping arm 41, when the first clamping arm 42 and the second clamping arm 41 are unclamped, the end of the second clamping arm 41 is moved outward to produce elastic deformation, and the clamping groove 413 is separated from the buckle part 421, under the action of the elastic force, the first clamping arm 42 is reset outward, and the two extrusion parts are away from each other.

[0041] The dialysis indwelling needle is provided with an annular protruding structure as an installation carrier of the air permeable membrane, is convenient for welding and fixing, and improves assembly precision and connection reliability; the double sealing plug structure is provided to realize double sealing and good sealing performance; the side wing structure is provided to provide good comfort after the indwinding needle is inserted, is convenient to fix, can stabilize the position of the indwinding needle, avoids displacement or falling during use, and is good in use comfort and stability; different colors are provided to quickly and accurately identify the type and specification of the indwinding needle; the dialysis indwinding needle is compact in structure, low in manufacturing cost, and good in use effect.

[0042] The above is only the preferred embodiment of the present application, and it should be pointed out that, for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the technical principles of the present application, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A dialysis indwelling needle characterized by: The application relates to a puncture needle tube assembly and a remaining catheter assembly, wherein the puncture needle tube assembly comprises a needle seat, a puncture needle arranged at the front end of the needle seat and a vent connector arranged at the rear end of the needle seat, a hole is arranged at the rear end of the needle seat and communicates with the puncture needle, through holes are arranged at the two ends of the vent connector and form exhaust holes, a plug-in part capable of being inserted into the hole and connected is arranged at the front end of the vent connector, and a waterproof and breathable film capable of realizing water blocking and air permeation is arranged at the end of the plug-in part.

2. The dialysis indwelling needle according to claim 1, wherein: The end of the plug-in part is provided with an annular protrusion, and the waterproof and breathable film is arranged at the end of the annular protrusion.

3. The dialysis indwelling needle as claimed in claim 1, wherein: The waterproof and breathable film is fixed at the end of the plug-in part through ultrasonic welding.

4. The dialysis indwelling needle as claimed in claim 1, wherein: The cross section of the hole and the plug-in part is circular, and the side wall is beveled.

5. The dialysis indwelling needle as defined in claim 1, wherein: The remaining catheter assembly comprises a catheter seat, a catheter arranged at the front end of the catheter seat, a connecting pipe arranged at the rear end of the catheter seat and a connecting head arranged at the end of the connecting pipe, a sealing plug is arranged in the connecting head, a limiting protrusion is arranged on the outer wall of the connecting head, the front end of the needle seat is provided with a sleeve capable of inserting the end of the connecting head, and a limiting groove capable of clamping the limiting protrusion and realizing detachable connection is arranged on the inner wall of the sleeve.

6. The dialysis indwelling needle according to claim 5, wherein: The side wall of the catheter seat is provided with a sheet-shaped and elastic side wing, the side wing is symmetrically arranged at two sides of the catheter seat, and the side wing has a fitting surface capable of being attached to a human body.

7. The dialysis indwelling needle as claimed in claim 6, wherein: The side wall of the catheter seat is provided with an annular groove, the side wing comprises a cylindrical sleeve capable of being sleeved into the annular groove, the side wall of the sleeve is symmetrically provided with two sheet-shaped side wing bodies, and the bottom surface of the side wing body forms the fitting surface.

8. The dialysis indwelling needle as claimed in claim 7, wherein: The sleeve is rotatably sleeved into the annular groove and can realize angle adjustment of the side wing.

9. The dialysis indwelling needle as defined in claim 5, wherein: The connecting pipe is provided with a flow-stopping clamp.

10. The dialysis indwelling needle as defined in claim 6, wherein: The side wing is provided with color identification or pattern identification.

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