CN214633259U

CN214633259U - Infusion catheter lateral connection type easy-to-fix straight remaining needle device

Info

Publication number: CN214633259U
Application number: CN202022923326.5U
Authority: CN
Inventors: 董珂敏
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-11-09
Anticipated expiration: 2030-12-09

Abstract

The utility model relates to the field of medical equipment, concretely relates to infusion pipe side direction connection type straight type of easy fixed type keeps somewhere needle device, include: the indwelling needle sleeve seat, the indwelling needle sleeve, the steering connecting seat, the ferrule and the catheter; the indwelling needle sleeve, the indwelling needle sleeve seat and the steering connecting seat are arranged in a straight line communication mode, a plurality of through holes are formed in the circumferential direction of the steering connecting seat, the ferrule is rotatably sleeved on the steering connecting seat and is communicated with the through holes, the ferrule is communicated with the catheter, and the steering connecting seat and the catheter are arranged perpendicularly. This device side direction sets up the pipe, need not the inflection pipe of inflection, has guaranteed the inside circulation of pipe promptly, can not make the pipe form stress when applying ointment or plaster again, has guaranteed to apply ointment or plaster the stability when fixing, has avoided the whole axial overlength of needle to be kept somewhere to traditional straight type, is difficult for applying ointment or plaster fixedly to the pipe.

Description

Infusion catheter lateral connection type easy-to-fix straight remaining needle device

Technical Field

The utility model relates to the field of medical equipment, particularly, relate to a straight type of infusion pipe side direction connected type easy fixed keeps somewhere needle device.

Background

The indwelling needle is a medical apparatus for intravenous indwelling infusion, is mainly applied to clinical venipuncture, takes medicine and provides nutrition for patients, can avoid vascular injury caused by multiple punctures and relieve the pain of the patients, and is also beneficial to reducing the operation intensity of nurses. Two kinds of existing indwelling needles are a straight indwelling needle (or a penholder type indwelling needle) and a Y-type indwelling needle, and the two kinds of indwelling needles are very common in use.

The puncture operation steps of the straight indwelling needle are as follows:

1. the needle sleeve is taken down, and the outer sleeve is loosened (the needle core is drawn back and forth).

2. The puncture part is disinfected conventionally, the straight indwelling needle is held by the right hand, and the needle is inserted above the blood vessel at 15-30 degrees from the skin.

3. After the puncture is successful, blood returns can be seen in the blood return cavity, the angle of the indwelling needle is reduced, the indwelling needle is tightly attached to the skin, and the index finger pushes the outer sleeve to enter.

4. The tourniquet is loosened by fixing the indwelling needle tube by the sterile application, and the needle core is still in the sleeve at the moment, so that blood cannot overflow.

5. Pressing the front blood vessel at the top end of the indwelling cannula to block blood flow, simultaneously pressing the catheter backseat with the forefinger by using a V-shaped technique to fix the needle seat, and withdrawing the needle core from the indwelling needle outer cannula.

6. Withdrawing the needle core, placing in a sharp device collector, connecting with an infusion apparatus, and applying the medical sterile patch to cover the puncture part according to the regulation.

At present, medical care personnel have the following defects when fixing after puncturing an alignment type indwelling needle: the rear side of the traditional straight indwelling needle is coaxially connected with an infusion catheter, so that the overall axial length is too long, and the infusion catheter needs to be folded and bent to reduce the axial straight length so as to be fixed. But the inside liquid medicine circulation of very easy jam pipe after the inflection is buckled forms the condition of overflow easily at pipe both sides port department, and the stress that the pipe formed when buckling simultaneously will apply ointment or plaster easily and open, leads to pasting the failure pine to take off, need apply ointment or plaster fixedly many times it, very consumes medical personnel's manpower. And for patients, the overflowing liquid medicine is easy to cause infection and pollution during transfusion, has larger safety risk and is very inconvenient to move.

Disclosure of Invention

In order to solve the problems, the utility model aims to provide an infusion catheter lateral connection type easy-fixing straight remaining needle device.

The utility model aims at realizing through the following technical scheme:

the utility model provides a pair of needle device is kept somewhere to straight type of easy fixed type of infusion catheter side direction connection formula, include: the indwelling needle sleeve seat, the indwelling needle sleeve, the steering connecting seat, the ferrule and the catheter; the indwelling needle sleeve, the indwelling needle sleeve seat and the steering connecting seat are arranged in a straight line communication mode, a plurality of through holes are formed in the circumferential direction of the steering connecting seat, the ferrule is rotatably sleeved on the steering connecting seat and is communicated with the through holes, the ferrule is communicated with the catheter, and the steering connecting seat and the catheter are arranged perpendicularly.

Furthermore, the steering connecting seat is sequentially divided into three sections along the axial direction; the front section of the steering connecting seat is an end head, the middle section of the steering connecting seat is a middle section connecting pipe, and the rear section of the steering connecting seat is a handheld control section; four groups of through holes are uniformly distributed on the pipe wall of the middle section connecting pipe at circumferential angles; a ferrule is sleeved outside the middle connecting pipe section, and the front end face and the rear end face of the ferrule are attached to the end heads of the front section and the rear section and the end face of the handheld control section; the inside of the ferrule is of a hollow structure, and a cavity area is arranged between the middle section connecting pipe and the ferrule.

Furthermore, clamping ribs with raised circumferences are respectively arranged on the outer walls of the middle section connecting pipes at the axial front and rear positions of the through hole in the cavity area, sealing gaskets are respectively sleeved outside the middle section connecting pipes at the two clamping ribs, and the outer sides of the sealing gaskets are simultaneously tightly attached to the inner wall of the ferrule.

Furthermore, a poking valve is arranged on the tube seat of the indwelling needle sleeve and is in a sheet shape and faces upwards vertically.

Furthermore, the outer wall of the indwelling needle sleeve seat is sleeved with a fixed wing, the fixed wing extends towards two sides to form an integrally fixed sheet wing, and the bottom of the fixed wing is of a complete plane structure.

Furthermore, the port of the rear end of the tube seat of the indwelling needle sleeve is designed to be an external thread Ruhr joint, the front end of the steering connecting seat is provided with a matched internal thread Ruhr joint, and the inner part of the port of the front end of the steering connecting seat extends axially to form a core tube.

Furthermore, a sheet-shaped rotating valve is integrally protruded on the outer wall of the rear section of the steering connecting seat or knurls are uniformly arranged on the circumference of the outer wall of the rear section of the steering connecting seat; the rotating valve is vertical when the steering connecting seat and the indwelling needle sleeve seat are in a separated state, and the rotating valve is horizontal when the steering connecting seat and the indwelling needle sleeve seat are in a butt joint state.

Furthermore, a lateral interface protruding outwards is arranged on the outer wall of the ferrule, the lateral interface is connected with a flexible conduit, a pipe clamp is arranged on the conduit, and the other end of the conduit is connected with a triangular connector; two connectors of the triangular connector are respectively provided with an external thread luer connector, and corresponding sealing caps are matched with the corresponding connectors.

Further, the device still includes applying ointment or plaster II, and applying ointment or plaster I is pasted in turning to connecting seat department, and applying ointment or plaster II is pasted in keeping somewhere needle sleeve seat department.

Furthermore, the indwelling needle sleeve and the indwelling needle sleeve seat are made of transparent PUR materials.

The utility model discloses a needle device is kept somewhere to easy fixed straight type of infusion catheter side direction connection formula has abandoned straight type and has kept somewhere the structural design of needle rear side with axial connecting tube, adopts to turn to the connecting seat on the side direction connecting tube for the pipe root with keep somewhere needle sleeve pipe mutually perpendicular. The problem that the traditional straight indwelling needle is too long in the whole axial direction is avoided, and the catheter is not easy to apply, paste and fix. This device side direction sets up the pipe, need not to turn over the pipe of buckling, has guaranteed the inside circulation of pipe promptly, can not make the pipe form stress when applying ointment or plaster again, has guaranteed the stability when applying ointment or plaster fixedly.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

FIG. 1 is a structural view showing a state of the infusion tube side-connected easy-to-fix straight indwelling needle device of the present invention;

FIG. 2 is a structural view showing another state of the infusion catheter lateral connection type easy-to-fix straight indwelling needle device of the present invention;

FIG. 3 is an exploded view of the structure of FIG. 2;

FIG. 4 is an exploded view of the steering connection seat and the ferrule of the infusion catheter lateral connection type easy-to-fix straight indwelling needle device of the present invention;

FIG. 5 is a cross-sectional view of the steering connecting seat and the ferrule of the infusion catheter lateral connection type easy-to-fix straight indwelling needle device of the present invention;

FIG. 6 is a structural view of a steering connection seat in the infusion catheter lateral connection type easy-to-fix straight indwelling needle device of the present invention;

FIG. 7 is a structural diagram of the side-connected easy-to-fix straight indwelling needle device of the infusion catheter of the present invention with the application I and the application II not applied;

FIG. 8 is a structural diagram of the application states of an application I and an application II in the infusion catheter lateral connection type easy-to-fix straight indwelling needle device of the present invention;

FIG. 9 is a structural view of knurling on the lateral connection type easily fixable straight indwelling needle device of the infusion catheter of the present invention;

wherein the reference numerals are: 1. a remaining needle sleeve seat; 2. an indwelling needle cannula; 3. a steering connecting seat; 4. a ferrule; 5. a conduit; 6. a through hole; 7. a clamping rib; 8. a gasket; 9. dialing the flap; 10. a fixed wing; 11. an external threaded luer fitting; 12. an internal threaded luer fitting; 13. a core tube; 14. rotating the flap; 15. knurling; 16. a lateral interface; 17. a pipe clamp; 18. a triangular joint; 19. applying I; 20. and (7) applying a patch II.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below 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 efforts shall belong to the protection scope of the present invention.

As shown in fig. 1 to 9, the utility model provides an infusion catheter side direction connection type easily fixable straight type indwelling needle device, including: the indwelling needle comprises an indwelling needle sleeve seat 1, an indwelling needle sleeve 2, a steering connecting seat 3, a ferrule 4 and a catheter 5; keep somewhere needle sleeve pipe 2, keep somewhere needle sleeve pipe seat 1, turn to connecting seat 3 and be a straight line intercommunication setting, turn to connecting seat 3 circumference and seted up a plurality of through-holes 6, lasso 4 rotationally overlaps and establishes on turning to connecting seat 3 and communicate with a plurality of through-holes 6, lasso 4 and pipe 5 intercommunication turn to connecting seat 3 and pipe 5 perpendicular setting.

The utility model discloses a needle device is kept somewhere to easy fixed straight type of infusion catheter 5 side direction connection formula has abandoned straight type and has kept somewhere needle rear side with axial connecting tube 5's structural design, adopts to turn to connecting seat 3 and go up side direction connecting tube 5 for 5 roots of pipe and the 2 mutually perpendicular of needle sleeve pipe are kept somewhere. The problem that the traditional straight indwelling needle is too long in the whole axial direction is avoided, and the catheter 5 is not easy to apply, paste and fix. This device side direction sets up pipe 5, need not to turn over the pipe 5 of buckling, has guaranteed the inside circulation of pipe 5 promptly, can not make pipe 5 form stress when applying ointment or plaster again, has guaranteed the stability when applying ointment or plaster fixedly.

Wherein, the steering connecting seat 3 is sequentially divided into three sections along the axial direction; the front section of the steering connecting seat 3 is an end head, the middle section is a middle section connecting pipe, and the rear section is a handheld control section; four groups of through holes 6 are uniformly distributed on the pipe wall of the middle section connecting pipe at circumferential angles; a ferrule 4 is sleeved outside the middle connecting pipe section, and the front end face and the rear end face of the ferrule 4 are attached to the end heads of the front section and the rear section and the end face of the handheld control section; the inside of the ferrule 4 is of a hollow structure, and a cavity area is arranged between the middle section connecting pipe and the ferrule 4.

The steering connecting seat 3 is sequentially divided into three sections along the axial direction, the front section is thick, the middle section is thin, the thicker section of the front section of the steering connecting seat 3 is an end head, the thinner section of the middle section is a middle section connecting pipe, and the thicker section of the rear section is used for controlling steering by hands. A plurality of through holes 6 are uniformly distributed on the pipe wall of the middle section connecting pipe in a circumferential angle mode, four groups of through holes 6 are arranged in the technical scheme, and the through holes 6 are used for communicating the inside. The ferrule 4 is sleeved outside the middle connecting pipe section of the steering connecting base 3, the front end face and the rear end face of the ferrule 4 can be attached to the front end face and the rear end face of the thicker section, the ferrule 4 is prevented from loosening in the axial front-rear direction, and the ferrule 4 can flexibly rotate relative to the steering connecting base 3. The interior of the ferrule 4 is of a hollow structure, so that a certain cavity area is formed between the exterior of the middle section connecting pipe in the interior of the ferrule 4 and the ferrule 4.

Wherein, the raised screens muscle 7 of circumference are provided with respectively on the middle section connecting pipe outer wall of the through-hole 6 axial fore-and-aft position in the cavity region, the middle section connecting pipe outside at two screens muscle 7 departments is overlapped respectively and is sealed 8, sealed 8 outsides hug closely in lasso 4 inner wall department simultaneously.

The outer walls of the middle section connecting pipes at the axial front and rear positions of the through hole 6 of the cavity area are respectively provided with a clamping rib 7 with a convex circumference, the outer parts of the middle section connecting pipes at the position of the clamping rib 7 are respectively sleeved with a sealing gasket 8, the outer side of the sealing gasket 8 is simultaneously clung to the inner wall of the ferrule 4, so that the sealing gasket 8 can play a role in sealing the axial front and rear port parts of the ferrule 4, and the liquid medicine is prevented from overflowing from the port parts of the ferrule 4. The raised screens muscle 7 of circumference is used for preventing sealed 8 axial slideings, plays stable fixed action to sealed 8. Meanwhile, the friction force of the tight fit of the sealing gasket 8 can play an instant hovering role on the ferrule 4, so that the ferrule 4 is ensured not to rotate by itself, and the stability of the structure is further ensured.

Wherein, the indwelling needle sleeve seat 1 is provided with a stirring flap 9, and the stirring flap 9 is in a sheet shape and is vertically upward.

This device mainly used solves straight type drainage tube rear end connecting pipe side direction bending and leads to applying ointment or plaster the fixed not firm condition. The device is mainly formed by connecting and fixing an indwelling needle sleeve seat 1, an indwelling needle sleeve 2, a steering connecting seat 3, a catheter 5 and other structures. Keep somewhere needle sleeve pipe seat 1 front end fixedly connected with and have certain axial length keep somewhere needle sleeve pipe 2, the fixed an organic whole of the front portion upside of keeping somewhere needle sleeve pipe seat 1 is provided with and dials lamella 9, it is vertical up to dial lamella 9, medical personnel can control and dial lamella 9 and carry out axial displacement control to keeping somewhere needle sleeve pipe seat 1, and only set up bellied stirring lamella 9 in the upper portion, aim at can not influence the bottom region when pasting fixedly to it, cause to paste fixed unstable condition and appear.

Wherein, the outer wall of the indwelling needle sleeve seat 1 is sleeved with a fixed wing 10, the fixed wing 10 extends towards two sides to form an integrally fixed sheet wing, and the bottom of the fixed wing 10 is of a complete plane structure.

The outer wall of the middle position of the indwelling needle sleeve seat 1 is sleeved with a fixed wing 10 structure, the fixed wing 10 extends towards two sides to form an integrally fixed sheet wing, the bottom of the fixed wing 10 is of a complete plane structure, and the design of the complete plane structure of the bottom can facilitate the application and the sticking of the indwelling needle sleeve seat 1.

Wherein, the port of the rear end of the indwelling needle sleeve seat 1 is designed to be an external thread luer connector 11, the front end of the steering connecting seat 3 is provided with a matched internal thread luer connector 12, and the inner part of the port of the front end of the steering connecting seat 3 extends axially to form a core pipe 13.

The port of the rear end of the indwelling needle sleeve seat 1 is designed into a structure of an external thread luer connector 11. The structure of the steering connecting seat 3 is screwed and connected with the rear end of the indwelling needle sleeve seat 1, the front end of the steering connecting seat 3 is provided with a matched internal thread Ruhr joint 12, the inside of the port extends axially to form a core pipe 13, and the core pipe 13 can be inserted into the inside of the port of the indwelling needle sleeve seat 1 during butt joint.

Wherein, the outer wall of the rear section of the steering connecting seat 3 is convexly and integrally provided with a flaky rotating valve 14 or the outer wall of the rear section of the steering connecting seat 3 is uniformly provided with knurls 15 on the circumference; the rotating valve 14 is vertical when the steering connecting seat 3 and the indwelling needle sleeve seat 1 are in a separated state, and the rotating valve 14 is horizontal when in a butt joint state.

The sheet-shaped rotating valve 14 is integrally and fixedly arranged on the outer wall of the thicker section of the rear end of the steering connecting seat 3 in a protruding mode, the rotating valve 14 is used for enabling medical staff to manually rotate the steering connecting seat 3 for 90 degrees, and the steering connecting seat is used for switching the state of screwing, locking and disengaging two Ruhr connectors when the steering connecting seat 3 is in butt joint with the remaining needle sleeve seat 1. The structure of the rotating valve 14 can be changed into knurls 15 uniformly arranged on the circumference of the outer wall of a thicker section at the rear side of the steering connecting seat 3, and the rotating valve can also be used for controlling the rotation control of the steering connecting seat 3.

Wherein, the outer wall of the ferrule 4 is provided with a lateral interface 16 protruding outwards, the lateral interface 16 is connected with a flexible conduit 5, the conduit 5 is provided with a pipe clamp 17, and the other end of the conduit 5 is connected with a triangular connector 18; two interfaces of the triangular connector 18 are both provided with external thread Ruhr connectors 11, and corresponding sealing caps are matched with the corresponding interfaces.

The outer wall of the ferrule 4 is provided with a lateral interface 16 protruding outwards, the lateral interface 16 is fixedly connected with a conduit 5, the flexible conduit 5 has a certain length, the conduit 5 is provided with a pipe clamp 17, and the pipe clamp 17 can control the communication and the blocking of the conduit 5. The other end of the conduit 5 is fixedly connected with a triangular connector 18, two connectors of the triangular connector 18 are respectively provided with an external thread Ruhr connector 11, and meanwhile, corresponding sealing caps are matched with the corresponding connectors, so that the sealing caps can be sealed and plugged when plugging is needed.

Wherein, the device also comprises an application I19 and an application II 20, the application I19 is pasted at the position of the steering connecting seat 3, and the application II 20 is pasted at the position of the indwelling needle sleeve seat 1.

When it is fixed with patient's skin to need pasting, use two blocks of not of uniform size to apply ointment or plaster I19 and apply ointment or plaster II 20, apply ointment or plaster I19 great for paste in turning to connecting seat 3 department, apply ointment or plaster II 20 less, be used for pasting and keep somewhere needle sleeve seat 1 department, keep somewhere the stationary vane 10 of needle sleeve seat 1 lower floor and can cooperate and apply ointment or plaster, play firm effect to the device.

Wherein, the indwelling needle sleeve 2 and the indwelling needle sleeve seat 1 are both made of transparent PUR materials.

The device adopts the indwelling needle sleeve 2 and the indwelling needle sleeve seat 1 which are made of transparent PUR materials, has good perspective and biocompatibility, and can reduce phlebitis.

The utility model discloses an innovation technical point and beneficial effect lie in at least:

1. the device abandons the structural design of the straight type indwelling needle rear side coaxial connecting catheter 5, and adopts the steering connecting seat 3 to turn the lateral connecting catheter 5, so that the root of the catheter 5 is perpendicular to the coplanar surface of the indwelling needle sleeve 2. The problem that the traditional straight indwelling needle is too long in the whole axial direction is avoided, and the catheter 5 is not easy to apply, paste and fix. The catheter 5 that the side direction set up in this device has guaranteed that the needle is kept somewhere to the straight type axial length after connecting, can keep somewhere needle sleeve 2 axial length change little with the list before the butt joint basically, very big having made things convenient for butt joint back medical personnel keep somewhere needle sleeve base 1 and turn to connecting seat 3, sleeve pipe to apply ointment or plaster fixedly to the patient, and very big reinforcing stability, difficult emergence is not hard up the circumstances such as.

2. The needle is kept somewhere to traditional straight type needs pipe 5 inflection to buckle when fixed after fixed, but the inflection is buckled the inside liquid medicine circulation of very easy jam pipe 5 of back, forms the condition of overflow easily at pipe 5 both sides port department, and the stress that pipe 5 formed when buckling simultaneously will apply ointment or plaster easily and push away, leads to pasting the failure pine and take off. This device side direction sets up pipe 5, need not to turn over the pipe 5 of buckling, has guaranteed the inside circulation of pipe 5 promptly, can not make pipe 5 form stress when applying ointment or plaster again, has guaranteed the stability when applying ointment or plaster fixedly.

3. Turn to the syllogic of 3 axial settings of connecting seat, middle thin section evenly distributed four group's through-holes 6, cooperate the side direction pipe 5 of lasso 4, make lasso 4 when rotating, lasso 4 overlaps under its periphery state, no matter for each angle of periphery circumference, the smoothness nature of intercommunication all can be guaranteed, the state of shutoff can not appear, lasso 4 is regional with the cavity that turns to 3 inside formations of connecting seat simultaneously, make four group's through-holes 6 all be in the connected state, the homoenergetic forms the intercommunication to pipe 5, the stability of intercommunication has further been guaranteed, the cavity region can regard as the blood return chamber simultaneously, can see back blood rapidly, conveniently judge the puncture condition.

4. The clamping rib 7 arranged outside the middle section connecting pipe of the steering connecting seat 3 plays a role in preventing the sealing gasket 8 from slipping, the sliding condition of the sealing gasket in the plugging process of the front and rear ports of the ferrule 4 is avoided, and the sealing stability is ensured.

5. The turning flap 14 structure arranged at the rear part of the turning connecting seat 3 and the knurling 15 structure in the alternative are both used for facilitating the turning connecting seat 3 to be turned, so that the turning connecting seat can be quickly and spirally jointed and butted or spirally jointed and separated from the indwelling needle sleeve seat 1, the turning flap 14 is vertical in the separation state, the turning flap 14 is horizontal in the butt joint state, and the application and sticking fixation can not be influenced.

6. The device adopts the indwelling needle sleeve 2 and the indwelling needle sleeve seat 1 which are made of transparent PUR materials, has good perspective and biocompatibility, can reduce phlebitis, softens 50 percent after entering blood, reduces mechanical injury of blood vessels, and can effectively prevent thrombosis.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a straight type of infusion catheter lateral connection formula easy fixed type indwelling needle device which characterized in that includes: the indwelling needle sleeve seat, the indwelling needle sleeve, the steering connecting seat, the ferrule and the catheter; the indwelling needle sleeve, the indwelling needle sleeve seat and the steering connecting seat are arranged in a straight line communication mode, a plurality of through holes are formed in the circumferential direction of the steering connecting seat, the ferrule is rotatably sleeved on the steering connecting seat and communicated with the through holes, the ferrule is communicated with the catheter, and the steering connecting seat and the catheter are vertically arranged.

2. The infusion tube lateral connection type easy-fixing straight indwelling needle device according to claim 1, wherein the steering connection base is divided into three sections in sequence along the axial direction; the front section of the steering connecting seat is an end head, the middle section of the steering connecting seat is a middle section connecting pipe, and the rear section of the steering connecting seat is a handheld control section; four groups of through holes are uniformly distributed on the pipe wall of the middle section connecting pipe at circumferential angles; the middle section connecting pipe is sleeved with the ferrule, and the front end face and the rear end face of the ferrule are attached to the end heads of the front section and the rear section and the end face of the handheld control section; the interior of the ferrule is of a hollow structure, and a cavity area is arranged between the middle section connecting pipe and the ferrule.

3. The infusion catheter lateral connection type easy-fixing straight indwelling needle device according to claim 2, wherein clamping ribs with raised circumferences are respectively arranged on the outer wall of the middle section connecting pipe at axial front and rear positions of the through hole in the cavity area, sealing gaskets are respectively sleeved outside the middle section connecting pipe at the two clamping ribs, and the outer sides of the sealing gaskets are simultaneously tightly attached to the inner wall of the ferrule.

4. The infusion catheter lateral connection type easy-fixing straight indwelling needle device according to claim 1, wherein a poking flap is arranged on the indwelling needle sleeve seat, and the poking flap is in a sheet shape and faces upwards vertically.

5. The infusion catheter lateral connection type easy-fixing straight indwelling needle device according to claim 1, wherein the outer wall of the indwelling needle hub is sleeved with a fixing wing, the fixing wing extends towards two sides to form an integrally fixed sheet-shaped wing, and the bottom of the fixing wing is of a complete plane structure.

6. The infusion catheter lateral-connection type easy-to-fix straight indwelling needle device according to claim 1, wherein the port at the rear end of the indwelling needle hub is designed as an external luer connector, the front end of the steering connecting hub is provided with a matching internal luer connector, and the inside of the port at the front end of the steering connecting hub is axially extended with a core tube.

7. The infusion catheter lateral connection type easy-fixing straight indwelling needle device according to claim 1, wherein a sheet-shaped rotating flap is integrally protruded on the outer wall of the rear section of the steering connecting seat or knurls are uniformly arranged on the circumference of the outer wall of the rear section of the steering connecting seat; the rotating valve is vertical when the steering connecting seat and the indwelling needle sleeve seat are in a separated state, and the rotating valve is horizontal when the steering connecting seat and the indwelling needle sleeve seat are in a butt joint state.

8. The infusion tube lateral connection type easy-fixing straight indwelling needle device according to claim 1, wherein a lateral interface protruding outwards is arranged on the outer wall of the ferrule, the lateral interface is connected with the flexible tube, a tube clamp is arranged on the tube, and the other end of the tube is connected with a triangular connector; two connectors of the triangular connector are respectively provided with an external thread luer connector, and corresponding sealing caps are matched with the corresponding connectors.

9. The infusion catheter lateral connection type easy-fixing straight indwelling needle device according to claim 1, further comprising an application I and an application II, wherein the application I is adhered to the steering connection seat, and the application II is adhered to the indwelling needle sleeve seat.

10. The infusion catheter lateral connection type easy-fixing straight indwelling needle device according to claim 1, wherein the indwelling needle cannula and the indwelling needle cannula base are made of transparent PUR material.