CN211132465U

CN211132465U - Novel indwelling needle capable of being punctured by single hand and fixed by U-shaped high-lift platform method

Info

Publication number: CN211132465U
Application number: CN201921207895.0U
Authority: CN
Inventors: 刘浩浩
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2020-07-31
Anticipated expiration: 2029-07-30

Abstract

The utility model discloses a novel indwelling needle which can be punctured by one hand and fixed by a U-shaped high-lift platform method, comprising a catheter, a rivet, a silica gel catheter holder coat, a catheter holder, an isolation plug, a push rod, a steel needle, a needle handle fixing column, an extension tube, a flow stopping clamp, a transfusion interface three-way seat, a needleless transfusion joint and an end cap; the novel indwelling needle which can be punctured by one hand and fixed by a U-shaped high-lift platform method improves the success rate of clinical puncture, particularly has high success rate of tube placement at one time, reduces the damage of the vascular wall, effectively reduces the occurrence of clinical related complications, reduces the workload of nurses, does not need two persons to puncture in a matching way, and reduces the labor cost of hospitals; the utility model discloses can singlehanded puncture and the fixed novel incidence of keeping somewhere the needle and reducing stifled pipe of platform method is lifted to U type height, the extension is kept somewhere the time, reduces the incidence of pressing the sore, effectively reduces the emergence of clinical relevant complication, avoids puncturing repeatedly, improves nurse work efficiency, and patient's satisfaction improves, and is fixed firm, avoids the emergence of unexpected tube drawing.

Description

Novel indwelling needle capable of being punctured by single hand and fixed by U-shaped high-lift platform method

Technical Field

The utility model relates to an indwelling needle technical field, especially a but one-hand puncture and fixed novel indwelling needle of U type high platform method.

Background

The disposable venous indwelling needle product is clinically used for collecting peripheral venous transfusion and blood samples, is used for carrying out short-term venipuncture indwelling and carrying out liquid medicine infusion, and is characterized in that the vein is slightly stimulated, the venous indwelling needle can be indwelling for a plurality of days, the pain of puncture of a patient is reduced, the use is simple and convenient and the like, so that the disposable venous indwelling needle becomes one of puncture tools which are most widely applied at present.

However, in the existing closed venous indwelling needle, the left hand often holds and supports and fixes the upper arm puncture part of a patient during puncture, the left hand needs to loosen the fixed part after blood return, the left hand forwards sends a catheter, the right hand backwards withdraws a needle tube, and once the left hand forwards sends the catheter, the blood vessel often becomes bent due to the fact that the blood vessel is not subjected to the external force action of left hand fixation any more, and the blood vessel is not straight as before, and slightly changes in direction and angle, so that puncture failure is caused.

During the indwelling period of the indwelling needle, the extension tube is clinically required to be fixed to be higher than the puncture point and fixed to be above the puncture point to prevent blood return of the indwelling needle and reduce the occurrence of clinical complications such as tube blockage, phlebitis and the like, but the extension tube needs to be bent upwards to achieve U-shaped fixation to achieve the fixation direction of the conventional indwelling needle, the problems of non-standard U-shaped bending, infirm fixation, easy clamping and tube folding and the like of the extension tube exist, meanwhile, in order to effectively fix the catheter in clinic, the indwelling needle usually adopts a high-lift platform method to fix the extension tube, no device capable of realizing high-lift platform method fixation exists in clinic at present, the traditional adhesive plaster is usually adopted to fix the tube on the skin, the adhesive plaster is usually in a gap with the skin, the adhesive plaster cannot be tightly attached to the skin, the tube and the skin rub, the adhesive plaster is narrow, low in viscosity and small in fixed area, the defects of pressing the skin, infirm fixation, easy pipeline separation and the like exist, and especially for patients in restlessness, non-coordination or long-term bed rest with malnutrition, improper fixation method can cause nursing adverse events such as local skin crushing damage, pipeline separation during position change and the like.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a novel indwelling needle which can be punctured by a single hand and fixed by a U-shaped high-lift platform method, and the fixing structure design of the U-shaped high-lift platform method is adopted while the puncturing by the single hand can be realized; the problem that two hands are needed to operate during puncture of a clinical indwelling needle is solved, the needle is inserted by one hand, and the catheter is sent to a blood vessel by one hand; after the puncture is completed, the U-shaped fixing can be realized only by rotating the extension pipe 180 degrees to the position above the puncture point, meanwhile, the silica gel block is designed by adopting a high-lift platform method, the high-lift platform method can be realized for fixing, and the U-shaped high-lift platform method can be completed in one step.

Realize the utility model discloses the technical solution of purpose does:

a novel indwelling needle capable of being punctured by one hand and fixed by a U-shaped high-lift platform method is characterized by comprising a catheter, a rivet, a silica gel catheter holder outer sleeve, a catheter holder, an isolating plug, a push rod, a steel needle, a needle handle fixing column, an extension tube, a flow stopping clamp, an infusion interface tee joint seat, a needle-free infusion joint and an end cap; the inner cavity of the catheter base is sequentially provided with a limiting table, a positioning step and a dispensing groove from front to back; the position limiting platform is provided with a rivet, the rivet is connected with one end of the guide pipe, and the other end of the guide pipe penetrates through the small hole of the guide pipe seat; an isolation plug is arranged at the positioning step, the front plane of the isolation plug is overlapped with the positioning step, a groove is formed in the tail end of the isolation plug, the groove is parallel to the glue dispensing groove, and the isolation plug is fixed through glue dispensing; a silica gel catheter seat jacket is fixed on the catheter seat; the front end of the needle handle fixing column is provided with a steel needle hole, the tail end of the needle handle fixing column is provided with a protruding ring, a positioning sliding groove is formed in the needle handle fixing column, one end of the positioning sliding groove is provided with a front limiting groove, and the other end of the positioning sliding groove is provided with a rear limiting groove; one end of the steel needle penetrates through the catheter, and the other end of the steel needle is fixed on the needle handle fixing column through the steel needle hole; the needle handle fixing column penetrates through the positioning hole of the needle handle and is buckled in the groove of the needle handle through the convex ring; the front end of the push rod is provided with a positioning column, the tail end of the push rod is provided with a finger push plate, an arc-shaped pressing groove is formed below the finger push plate, and a clamping head is arranged below the arc-shaped pressing groove; one end of the push rod is connected with the catheter seat through the positioning column, the other end of the push rod is sleeved on the needle handle fixing column through the inner hole, the finger push plate is clamped in the sliding groove, and the chuck is clamped in the positioning sliding groove to realize front and back sliding; when the clamping head moves to the rear limiting groove, the clamping head is clamped in the rear limiting groove to realize rear positioning; when the finger push plate is pressed, the finger push plate can move up and down in the arc-shaped pressing groove, so that the clamping head can be pressed down into the positioning sliding groove, the push rod is pushed forward, the push rod can be moved forward, when the finger push plate moves to the front limiting groove, the clamping head is clamped in the front limiting groove, and similarly, when the finger push plate is pressed, the clamping head can be pressed down again into the positioning sliding groove, and the push rod is pushed backwards, so that the push rod can move backwards; one end of the extension tube penetrates through an inner hole of the extension tube of the silica gel catheter seat sleeve and then is communicated with the Y-side communication of the catheter seat, the other end of the extension tube is communicated with a pipeline hole of the infusion interface tee seat, a needle-free infusion connector is arranged on an interface of the infusion interface tee seat, and an end cap is arranged on a side communication interface of the infusion interface tee seat; and the extension pipe is provided with a flow stopping clamp which penetrates through the extension pipe.

Preferably, the conduit is fitted to the rivet by flaring, the rivet being pressed into a stop in the conduit seat.

Preferably, the silica gel pipe seat overcoat passes through the hole to be fixed on the pipe seat, and the interior plane coincidence of preceding terminal surface and silica gel pipe seat overcoat of pipe seat, the Y side of pipe seat lead to with the silica gel Y side of silica gel pipe seat overcoat lead to the same centre of a circle, and the preceding terminal surface that the Y side leads to coincides with the interior plane coincidence that the silica gel Y side leads to.

Preferably, a blood return window is arranged on the silica gel catheter seat outer sleeve, and a groove is formed in a silica gel clamping block of the silica gel catheter seat outer sleeve.

Preferably, a fixed wing structure is arranged on the silica gel catheter base outer sleeve.

Preferably, an upward Y-side channel is arranged on the catheter seat, and an included angle between the Y-side channel and the central axis of the catheter seat is smaller than or equal to 90 degrees.

Preferably, the push rod is provided with a fixing clamp, and a silica gel clamping block sleeved outside the silica gel catheter seat is buckled on the fixing clamp after rotating for 180 degrees.

Preferably, the push rod is assembled in the inner cavity of the conduit seat through the positioning column, and the rear end face of the conduit seat is overlapped with the bottom end face of the positioning column.

Preferably, one end of the extension tube penetrates through an extension tube inner hole of the silica gel catheter base outer sleeve and then is bonded to the Y-side through hole of the catheter base, and the other end of the extension tube is bonded to a pipeline hole of the infusion interface tee base.

Preferably, the needleless infusion joint is screwed on the interface of the infusion interface tee base through luer threads, and the end cap is screwed on the side interface of the infusion interface tee base through luer threads.

Compared with the prior art, the utility model, it is showing the advantage:

(1) the utility model discloses can singlehanded puncture and the fixed novel needle of keeping somewhere of platform method that U type height lift improve clinical puncture success rate, especially once put a tub success rate height, reduce the damage of vascular wall, effectively reduce the emergence of clinical relevant complication, nurse's work load reduces, need not two people cooperation puncture, reduces the human cost of hospital, and patient's satisfaction improves.

(2) The utility model discloses can singlehanded puncture and the fixed novel incidence of keeping somewhere the needle and reducing stifled pipe of platform method is lifted to U type height, the extension is kept somewhere the time, reduces the incidence of pressing the sore, effectively reduces the emergence of clinical relevant complication, avoids puncturing repeatedly, improves nurse work efficiency, and patient's satisfaction improves, and is fixed firm, avoids the emergence of unexpected tube drawing.

Drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings required in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the novel indwelling needle which can be punctured by one hand and fixed by a U-shaped high-lift platform method.

Fig. 2 is an explosion diagram of the novel indwelling needle which can be punctured by one hand and fixed by a U-shaped high-lift platform method.

Fig. 3 is a schematic structural view of the catheter hub of the present invention.

Fig. 4 is a schematic structural view of the jacket of the catheter holder of the present invention.

Fig. 5 is a schematic structural view of the middle catheter hub of the present invention with a fixed wing structure.

Fig. 6 is a schematic structural view of the middle needle handle of the present invention.

Fig. 7 is a schematic structural view of the catheter holder, catheter holder sheath and needle handle assembly of the present invention.

Fig. 8 is a schematic structural view of the indwelling needle of the present invention when assembled.

Fig. 9 is a schematic structural view of the indwelling needle of the present invention before puncture.

Fig. 10 is a schematic structural view in the puncture of the indwelling needle according to the present invention.

Fig. 11 is a schematic structural view of the indwelling needle after puncture is completed.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1:

as shown in fig. 1 to 8, a novel indwelling needle capable of being punctured by one hand and fixed by a U-shaped high-lift platform method comprises a catheter 1, a rivet 2, a silica gel catheter holder outer sleeve 3, a catheter holder 4, an isolating plug 5, a push rod 6, a steel needle 7, a needle handle 8, a needle handle fixing column 9, an extension tube 10, a flow stopping clamp 11, a transfusion interface tee joint 12, a needleless transfusion connector 13 and an end cap 14; the inner cavity 42 of the catheter seat 4 is sequentially provided with a limiting table 43, a positioning step 44 and a glue dispensing groove 41 from front to back; the position limiting table 43 is provided with a rivet 2, the rivet 2 is connected with one end of the guide pipe 1, and the other end of the guide pipe 1 penetrates through a small hole 45 of the guide pipe seat 4; the guide pipe 1 is assembled on the rivet 2 through flaring, and the rivet 2 is pressed into a limiting table 43 in the guide pipe seat 4; an isolation plug 5 is arranged at the position of the positioning step 44, a front plane 52 of the isolation plug 5 is overlapped with the positioning step 44, a groove 51 is arranged at the tail end of the isolation plug 5, the groove 51 is parallel to the glue dispensing groove 41, and the isolation plug 5 is fixed by glue dispensing; an upward Y-side through 47 is arranged on the catheter seat 4, and the included angle between the Y-side through 47 and the central axis of the catheter seat is less than or equal to 90 degrees; a silica gel catheter holder outer sleeve 3 is fixed on the catheter holder 4, the silica gel catheter holder outer sleeve 3 is sleeved on the catheter holder 4 through an inner hole 32, the front end surface 46 of the catheter holder 4 is overlapped with an inner plane 34 of the silica gel catheter holder outer sleeve 3, a Y-side through 47 of the catheter holder 4 is concentric with a silica gel Y-side through 35 of the silica gel catheter holder outer sleeve 3, and the front end surface of the Y-side through 47 is overlapped with an inner plane of the silica gel Y-side through 35; a blood return window 33 is arranged on the silica gel catheter holder outer sleeve 3, and a groove 38 is arranged on a silica gel fixture block 37 of the silica gel catheter holder outer sleeve 3; the silica gel catheter base outer sleeve 3 can be provided with a fixed wing structure 39 in any shape; a steel needle hole 92 is formed in the front end of the needle handle fixing column 9, a protruding ring 91 is arranged at the tail end of the needle handle fixing column 9, a positioning sliding groove 95 is formed in the needle handle fixing column 9, a front limiting groove 93 is formed in one end of the positioning sliding groove 95, and a rear limiting groove 94 is formed in the other end of the positioning sliding groove 95; one end of the steel needle 7 penetrates through the catheter 1, and the other end of the steel needle 7 is fixed on the needle handle fixing column 9 through the steel needle hole 92; the needle handle fixing column 9 penetrates through the positioning hole 82 of the needle handle 8, and the needle handle fixing column 9 is buckled in the groove 83 of the needle handle 8 through the convex ring 91; a positioning column 62 is arranged at the front end of the push rod 6, a finger push plate 64 is arranged at the tail end of the push rod 6, an arc-shaped pressing groove 63 is arranged below the finger push plate 64, and a clamping head 65 is arranged below the arc-shaped pressing groove 63; one end of the push rod 6 is connected with the catheter base 4 through the positioning column 62, the push rod 6 is assembled in the inner cavity 42 of the catheter base 4 through the positioning column 62, and the rear end surface 48 of the catheter base 4 is overlapped with the bottom end surface 67 of the positioning column 62; the other end of the push rod 6 is sleeved on the needle handle fixing column 9 through an inner hole 66, the finger push plate 64 is clamped in the sliding groove 81, and the clamping head 65 is clamped in the positioning sliding groove 95 to realize front and back sliding; when the chuck 65 moves to the rear limiting groove 94, the chuck 65 is clamped in the rear limiting groove 94 to realize rear positioning; when the finger push plate 64 is pressed, the finger push plate 64 can move up and down in the arc-shaped pressing groove 63, so that the clamping head 65 can be pressed into the positioning sliding groove 95 to push the push rod 6 forwards, the push rod 6 can move forwards, when the clamping head 65 moves to the front limiting groove 93, the clamping head 65 is clamped in the front limiting groove 93, and similarly, when the finger push plate 64 is pressed, the clamping head 65 can be pressed down again to enter the positioning sliding groove 95, and the push rod 6 is pushed backwards to enable the push rod 6 to move backwards; the push rod 6 is provided with a fixing clamp 61, and the silica gel fixture block 37 of the silica gel catheter holder outer sleeve 3 is rotated by 180 degrees and then is buckled on the fixing clamp 61; the extension pipe 10 is provided with a flow stopping clamp 11, and the flow stopping clamp 11 penetrates through the extension pipe 10; one end of the extension tube 10 penetrates through an extension tube inner hole 31 of the silica gel catheter seat outer sleeve 3 and then is communicated with a Y-side through 47 of the catheter seat 4, the other end of the extension tube 10 is communicated with a pipeline hole 121 of the infusion interface tee seat 12, a needle-free infusion connector 13 is arranged on a connector 122 of the infusion interface tee seat 12, and an end cap 14 is arranged on a side through connector 123 of the infusion interface tee seat 12; one end of the extension tube 10 penetrates through an extension tube inner hole 31 of the silica gel catheter base outer sleeve 3 and then is bonded to a Y-side through 47 of the catheter base 4, and the other end of the extension tube 10 is bonded to a pipeline hole 121 of the infusion interface tee base 12; the needleless infusion connector 13 is screwed on the interface 122 of the infusion interface tee 12 through luer threads, and the end cap 14 is screwed on the side interface 123 of the infusion interface tee 12 through luer threads.

The utility model discloses but one-hand puncture and the fixed novel theory of operation of keeping somewhere of platform method are lifted to U type height:

as shown in figure 9, before puncture, an injector or an infusion apparatus is connected with a needleless infusion connector 13, or an end cap 14 is screwed down and connected on a side through interface 123, air exhaust operation is carried out, after air exhaust is completed, the left hand is used for fixing the skin of a puncture point of a patient, a blood vessel is straightened, a needle handle 8 is pinched by the thumb and the index finger of the right hand, a needle is inserted at an angle of 15-30 degrees, the blood vessel is straightened, after blood return is observed through a blood return window 33, the angle is reduced to 5-15 degrees, a little blood continues to enter, and the tip of the catheter is ensured to enter the blood vessel.

As shown in fig. 10, during puncturing, the thumb of the right hand presses the finger pushing plate 64 to separate the pushing rod chuck 65 from the rear limiting groove 94 of the needle handle fixing column 9, the pushing rod chuck enters the positioning chute 95, the finger pushing plate 64 is pushed forward, the pushing rod positioning column 62 pushes the catheter seat 4 to move forward, the catheter 1 is pushed to enter the blood vessel, the effective length of the catheter 1 is set to be different according to different specifications, for example, the effective length of a 24G indwelling needle catheter is 19mm, the length of the corresponding positioning chute 95 is also 19mm, a sufficient distance for the pushing rod to move forward can be ensured, and the catheter can be completely sent into the blood vessel; whole tub process of putting, the puncture point can be held always to the left hand, only needs right hand one-hand operation, can accomplish whole tub process of sending, improves the puncture success rate, especially once successfully puts the tub rate, reduces the damage of vascular wall, effectively reduces the emergence of clinical relevant complication, and nurse's work load reduces, need not two people cooperation puncture, reduces the human cost of hospital, and patient's satisfaction improves simultaneously.

As shown in fig. 11, after the catheter 1 completely enters the blood vessel, the puncture is completed, the silica gel fixture block 37 of the silica gel catheter sheath 3 is taken down from the fixing clamp 61 of the push rod 6, and is turned over 180 degrees upwards to reach the skin of the patient, so that the U-shaped fixation can be realized, and meanwhile, the design thickness of the silica gel fixture block is 3-5mm, so that the catheter can be fixed by a clinical high-lift platform method, a nurse is not required to wind the catheter by using a medical adhesive tape to realize the U-shaped high-lift platform method for fixing the catheter, and the puncture is simple and convenient, and can be realized by one step, so that the workload of the; the U-shaped high-lift platform method fixing design structure can reduce the incidence of pipe blockage, prolong the retention time, avoid repeated puncture, improve the working efficiency of nurses, ensure firm fixation, avoid accidental pipe drawing, reduce the winding and fixation of adhesive tapes, reduce the occurrence of pressure sores, finally press the outer sleeve of the silica gel catheter seat with the left hand, hold the needle handle 8 with the right hand and withdraw the steel needle; fixing the silica gel catheter outer sleeve by transparent application without tension; and because the silica gel catheter jacket 3 is arranged outside the catheter seat 4, and the silica gel material is adopted, the compression of the traditional hard plastic material on the skin puncture point can be reduced, the occurrence of complications such as pressure sores is reduced, and the comfort of patients is better.

To sum up, the novel indwelling needle which can be punctured by one hand and fixed by the U-shaped high-lift platform method improves the success rate of clinical puncturing, particularly has high success rate of one-time tube placement, reduces the damage of the blood vessel wall, effectively reduces the occurrence of clinical related complications, reduces the workload of nurses, does not need two persons to puncture in a matching way, reduces the labor cost of hospitals, and improves the satisfaction degree of patients; just the utility model discloses can singlehanded puncture and the fixed novel incidence of keeping somewhere the needle and reducing stifled pipe of platform method is lifted to U type height, the extension is kept somewhere the time, reduces the incidence of pressing the sore, effectively reduces the emergence of clinical relevant complication, avoids puncturing repeatedly, improves nurse work efficiency, and patient's satisfaction improves, and is fixed firm, avoids the emergence of unexpected tube drawing.

The above-mentioned embodiments further explain the technical problems, technical solutions and advantages of the present invention in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A novel indwelling needle capable of being punctured by one hand and fixed by a U-shaped high-lift platform method is characterized by comprising a catheter (1), a rivet (2), a silica gel catheter seat outer sleeve (3), a catheter seat (4), an isolating plug (5), a push rod (6), a steel needle (7), a needle handle (8), a needle handle fixing column (9), an extension tube (10), a flow stopping clamp (11), an infusion interface three-way seat (12), a needle-free infusion joint (13) and an end cap (14); an inner cavity (42) of the catheter seat (4) is sequentially provided with a limiting table (43), a positioning step (44) and a dispensing groove (41) from front to back; the position limiting platform (43) is provided with a rivet (2), the rivet (2) is connected with one end of the guide pipe (1), and the other end of the guide pipe (1) penetrates through a small hole (45) of the guide pipe seat (4); an isolation plug (5) is arranged at the position of the positioning step (44), a front plane (52) of the isolation plug (5) is overlapped with the positioning step (44), a groove (51) is arranged at the tail end of the isolation plug (5), the groove (51) is parallel to the glue dispensing groove (41), and the isolation plug (5) is fixed by dispensing; a silica gel catheter seat jacket (3) is fixed on the catheter seat (4); a steel needle hole (92) is formed in the front end of the needle handle fixing column (9), a protruding ring (91) is arranged at the tail end of the needle handle fixing column (9), a positioning sliding groove (95) is formed in the needle handle fixing column (9), a front limiting groove (93) is formed in one end of the positioning sliding groove (95), and a rear limiting groove (94) is formed in the other end of the positioning sliding groove (95); one end of the steel needle (7) penetrates through the catheter (1), and the other end of the steel needle (7) is fixed on the needle handle fixing column (9) through a steel needle hole (92); the needle handle fixing column (9) penetrates through the positioning hole (82) of the needle handle (8), and the needle handle fixing column (9) is buckled in a groove (83) of the needle handle (8) through a convex ring (91); a positioning column (62) is arranged at the front end of the push rod (6), a finger push plate (64) is arranged at the tail end of the push rod (6), a circular arc-shaped pressing groove (63) is formed below the finger push plate (64), and a clamping head (65) is arranged below the circular arc-shaped pressing groove (63); one end of the push rod (6) is connected with the catheter seat (4) through a positioning column (62), the other end of the push rod (6) is sleeved on the needle handle fixing column (9) through an inner hole (66), the finger push plate (64) is clamped in the sliding groove (81), and the clamping head (65) is clamped in the positioning sliding groove (95) to realize front and back sliding; when the clamping head (65) moves to the rear limiting groove (94), the clamping head (65) is clamped in the rear limiting groove (94) to realize rear positioning; when the finger push plate (64) is pressed, the finger push plate (64) can move up and down in the arc-shaped pressing groove (63), the clamping head (65) can be pressed into the positioning sliding groove (95) to push the push rod (6) forwards, the push rod (6) can move forwards, when the push rod moves to the front limiting groove (93), the clamping head (65) is clamped in the front limiting groove (93), and similarly, the finger push plate (64) is pressed, the clamping head (65) can be pressed into the positioning sliding groove (95) again, and the push rod (6) can be pushed backwards to move the push rod (6); one end of the extension tube (10) penetrates through an extension tube inner hole (31) of the silica gel catheter seat outer sleeve (3) and then is communicated with a Y-side through hole (47) of the catheter seat (4), the other end of the extension tube (10) is communicated with a pipeline hole (121) of the infusion interface tee seat (12), a needle-free infusion joint (13) is arranged on an interface (122) of the infusion interface tee seat (12), and an end cap (14) is arranged on a side through interface (123) of the infusion interface tee seat (12); the extension pipe (10) is provided with a flow stopping clip (11), and the flow stopping clip (11) penetrates through the extension pipe (10).

2. The novel indwelling needle capable of being punctured by one hand and fixed by the U-shaped high-lift platform method according to claim 1, wherein the catheter (1) is assembled on the rivet (2) through flaring, and the rivet (2) is pressed into a limit table (43) in the catheter seat (4).

3. The novel indwelling needle capable of being punctured by one hand and fixed by the U-shaped high-lift platform method according to claim 1, wherein the silica gel catheter holder outer sleeve (3) is fixed on the catheter holder (4) through the inner hole (32), the front end surface (46) of the catheter holder (4) coincides with the inner plane (34) of the silica gel catheter holder outer sleeve (3), the Y-side through (47) of the catheter holder (4) is concentric with the silica gel Y-side through (35) of the silica gel catheter holder outer sleeve (3), and the front end surface of the Y-side through (47) coincides with the inner plane of the silica gel Y-side through (35).

4. The novel indwelling needle capable of being punctured by one hand and fixed by the U-shaped high-lift platform method according to claim 1, wherein a blood return window (33) is arranged on the silica gel catheter holder outer sleeve (3), and a groove (38) is arranged on a silica gel clamping block (37) of the silica gel catheter holder outer sleeve (3).

5. The novel indwelling needle capable of being punctured by one hand and fixed by a U-shaped high-lift platform method according to claim 1, wherein a fixed wing structure (39) is arranged on the silica gel catheter holder outer sleeve (3).

6. The novel indwelling needle capable of being punctured by one hand and fixed by the U-shaped high-lift platform method according to claim 1, wherein the catheter holder (4) is provided with an upward Y-shaped side channel (47), and the included angle between the Y-shaped side channel (47) and the central axis of the catheter holder is less than or equal to 90 degrees.

7. The novel indwelling needle capable of being punctured by one hand and fixed by the U-shaped high-lift platform method according to claim 1, wherein a fixing clip (61) is arranged on the push rod (6), and the silica gel fixture block (37) of the silica gel catheter holder outer sleeve (3) is rotated 180 degrees and then is buckled on the fixing clip (61).

8. The novel indwelling needle capable of being punctured by one hand and fixed by the U-shaped high-lift platform method according to claim 1, wherein the push rod (6) is assembled in the inner cavity (42) of the catheter seat (4) through the positioning column (62), and the rear end surface (48) of the catheter seat (4) is overlapped with the bottom end surface (67) of the positioning column (62).

9. The novel indwelling needle capable of being punctured by one hand and fixed by the U-shaped high-lift platform method according to claim 1, wherein one end of the extension tube (10) passes through an extension tube inner hole (31) of the silica gel catheter holder outer sleeve (3) and then is bonded to a Y-side through hole (47) of the catheter holder (4), and the other end of the extension tube (10) is bonded to a pipeline hole (121) of the infusion port tee-joint seat (12).

10. The novel indwelling needle capable of being punctured by one hand and fixed by the U-shaped high-lift platform method according to claim 1, wherein the needleless infusion connector (13) is screwed on the interface (122) of the infusion interface tee base (12) through luer threads, and the end cap (14) is screwed on the side interface (123) of the infusion interface tee base (12) through luer threads.