CN213491149U

CN213491149U - Medical indwelling needle and infusion device

Info

Publication number: CN213491149U
Application number: CN202021542531.0U
Authority: CN
Inventors: 王五星; 王德忍
Original assignee: Guangdong Ante Medical Co ltd
Current assignee: Guangdong Ante Medical Co ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2021-06-22
Anticipated expiration: 2030-07-29

Abstract

The utility model discloses a medical indwelling needle and a transfusion device, wherein, the medical indwelling needle comprises a catheter seat, a needle tube, a connecting tube and a joint structure, the catheter seat comprises a main body section and an input section, the input section is connected with the side wall of the main body section and is communicated with the inside of the main body section; the needle tube is arranged in the main body section and communicated with the interior of the main body section, and a puncture end is formed at one end of the needle tube and extends out of the main body section; the connecting pipe is communicated with the input section; the joint design cover is established and is fixed in the connecting pipe, the joint design deviates from the one end of connecting pipe is formed with switching portion, switching portion in order to be used for with outside infusion pipeline or exhaust joint connection. The technical proposal of the utility model aims to improve the convenience when the medical indwelling needle is connected with the external infusion pipeline and the exhaust joint and improve the efficiency when the medical care personnel operate.

Description

Medical indwelling needle and infusion device

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a medical indwelling needle and infusion device.

Background

Infusion is to infuse an injection into a human body by intravenous drip, and an indwelling needle is required to be used as a medium in the infusion process, so that the use of the indwelling needle can reduce pain caused by repeated puncture of veins, and the workload of medical staff is reduced. Keep somewhere the needle among the relevant art and need additionally set up just can be connected with outside transfusion tube way like different joints such as U type joint or Y type joint, still need connect the exhaust joint before keeping somewhere the needle use simultaneously in order to keeping somewhere the inside exhaust of needle, so need after keeping somewhere the needle exhaust again with different joints such as U type joint or Y type joint change exhaust joint can with outside transfusion tube way connection, this process operating time is too long to lead to the installation effectiveness too low, be not convenient for keeping somewhere the use of needle.

The above is only for the purpose of assisting understanding of the technical solutions of the present application, and does not represent an admission that the above is prior art.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a medical remaining needle, aiming at improving the convenience of the medical remaining needle when being connected with an external infusion pipeline and an exhaust joint and improving the efficiency of medical personnel when operating.

In order to achieve the above object, the utility model provides a medical indwelling needle, include:

a catheter hub comprising a main body section and an input section, the input section being connected to a sidewall of the main body section and communicating with the interior of the main body section;

the needle tube is arranged in the main body section and communicated with the interior of the main body section, and a puncture end is formed at one end of the needle tube and extends out of the main body section;

a connecting pipe, which is communicated with the input section; and

the joint design, the joint design cover is established and is fixed in the connecting pipe, the joint design deviates from the one end of connecting pipe is formed with switching portion, switching portion in order to be used for with outside infusion pipeline or exhaust articulate.

In an embodiment of this application, the joint design still includes presses splenium and connecting portion, press the splenium with the switching portion is connected, connecting portion connect in press the splenium to deviate from the one end of switching portion, the connecting portion cover is located the connecting pipe deviates from the outer wall of input section one end, the switching portion press the splenium and connecting portion communicate in proper order in order to form the liquid medicine passageway.

In an embodiment of the present application, central axes of the connecting portion, the pressing portion, and the second connecting portion all coincide;

and/or the outer wall surface of one end of the second connecting part, which is deviated from the pressing part, forms a connecting thread.

In an embodiment of the present application, an elastic layer is formed on an outer wall of the pressing portion.

In an embodiment of the present application, the pressing portion is defined to have a length direction, and a cross-sectional area of the pressing portion is larger than a cross-sectional area of the connecting portion and a cross-sectional area of the adaptor portion.

In an embodiment of the application, the joint structure further includes a plurality of anti-slip ribs, and the anti-slip ribs are connected to the surface of the elastic layer and arranged along the length direction of the pressing portion at intervals.

In an embodiment of the present application, the connection surface of the pressing portion and the connection portion is an arc surface.

In an embodiment of the present application, the sidewall of the main body section is provided with a positioning hole, and the medical indwelling needle further includes:

a conduit connected to and in communication with the main body section;

the rubber plug is connected in the main body section and positioned between the catheter and the positioning hole so as to be used for plugging one end of the main body section, which is far away from the catheter, and the needle tube is fixed on the rubber plug; and

the fixing piece is clamped and fixed in the positioning hole of the main body section so as to be used for abutting against one side of the rubber plug, which deviates from the guide pipe.

In an embodiment of this application, the needle tubing is including the canned paragraph and the section of crossing that are connected, it deviates from to cross the section the one end of canned paragraph forms the puncture end, the canned paragraph appears in the mounting deviates from one side of plug, it is fixed in to cross the section the plug, cross the section and pass in proper order the mounting plug and the pipe, and with switch on in the pipe, the inner wall interval of canned paragraph is less than the inner wall interval of crossing the section, the canned paragraph is used for shutoff blood to follow the needle tubing deviates from the one end of puncture end flows.

The utility model also provides an infusion set, including the medical needle of keeping somewhere, the medical needle of keeping somewhere includes:

a connecting pipe, which is communicated with the input section; and

the joint structure is sleeved and fixed on the outer wall surface of one end, away from the input section, of the connecting pipe so as to be connected with an external infusion joint;

the joint design outer wall is formed with according to the splenium, the material that presses the splenium is elastic material.

The utility model discloses technical scheme medical needle of keeping somewhere is applied to infusion set, and this medical needle of keeping somewhere includes pipe seat and needle tubing, and this pipe seat includes main part section and input section, and this input section is connected in the lateral wall of main part section to with the inside intercommunication of main part section, in the main part section and with the inside intercommunication of main part section were located to the needle tubing, needle tubing one end was formed with the end of puncture, and the end of puncture stretches out the main part section outside so that insert human blood vessel, makes pipe seat and human blood vessel intercommunication. This medical needle of keeping somewhere still includes connecting pipe and joint design, and this connecting pipe and input section intercommunication, joint design cover are established and are fixed in the connecting pipe, and the joint design deviates from the one end of connecting pipe and is formed with switching portion, and this switching portion is used for being connected with outside infusion pipeline or exhaust joint. Because the joint design is fixed in the connecting pipe through cup jointing and cooperates, this mounting means is convenient and comparatively stable, so that the joint design is difficult to deviate from the connecting pipe, and then make the liquid medicine can loop through connecting pipe and input section and main part interior back entering human blood vessel steadily, and the switching portion of this joint design both can be connected with outside infusion pipeline and can also be connected with exhaust joint, consequently can be directly connected with outside infusion pipeline after dismantling exhaust joint after the exhaust, operating personnel's operating time has been reduced, the installation effectiveness is improved, make medical needle of keeping somewhere comparatively convenient and outside infusion articulate, improve the convenience that medical needle of keeping somewhere is connected.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, 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 the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of an embodiment of the medical indwelling needle of the present invention;

FIG. 2 is a schematic sectional view of the medical indwelling needle according to the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is an enlarged view of a portion of FIG. 2 at B;

FIG. 5 is a schematic view of the explosion structure of the medical indwelling needle of the present invention;

FIG. 6 is a structural schematic view of the joint structure of the medical indwelling needle of the present invention;

FIG. 7 is a schematic structural view of a fixing member of the medical indwelling needle of the present invention;

FIG. 8 is a schematic view of the catheter holder of the medical indwelling needle of the present invention;

FIG. 9 is a schematic structural view of the needle tube of the medical indwelling needle of the present invention;

fig. 10 is a schematic view of the assembly structure of the air discharge joint and the air-permeable membrane of the medical indwelling needle of the present invention.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

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 efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a medical indwelling needle 100.

Referring to fig. 1 to 4, in the embodiment of the present invention, the medical indwelling needle 100 includes a catheter hub 10, a needle tube 20, a connecting tube 30 and a joint structure 40, the catheter hub 10 includes a main body section 11 and an input section 12, the input section 12 is connected to a side wall of the main body section 11 and is communicated with the inside of the main body section 11; the needle tube 20 is arranged in the main body section 11 and is communicated with the interior of the main body section 11, a puncture end 221 is formed at one end of the needle tube 20, and the puncture end 221 extends out of the main body section 11; the connecting pipe 30 is communicated with the input section 12; the joint structure 40 is fixed in the connecting pipe 30 in a sleeved mode, one end, deviating from the connecting pipe 30, of the joint structure 40 is provided with an adapter part 43, and the adapter part 43 is used for being connected with an external infusion pipeline or an exhaust connector 50.

Referring to fig. 5 and 8, the main body segment 11 and the input segment 12 may be an integral structure, that is, an early installation process is omitted, and the structural strength of the catheter hub 10 is ensured, and the input segment 12 and the main body segment 11 may be disposed at an included angle, so that the input segment 12 is connected to the connection tube 30. In addition, the medical indwelling needle 100 further includes a liquid stopping clip 90A, the liquid stopping clip 90A is connected to the connecting tube 30 for opening or closing the circulation in the connecting tube 30, so that the connection in the connecting tube 30 can be closed by the liquid stopping clip 90A after the air is exhausted, and the air exhaust connector 50 is replaced with an external infusion tube to be connected, and then the liquid stopping clip 90A is opened to allow the external medical solution to enter the blood vessel of the human body through the connecting tube 30. The pressing portion 41 is made of an elastic material, such as rubber, silicone, or plastic, but may also be made of other materials with slight elasticity.

Further, referring to fig. 1 to 5 and 10, the medical indwelling needle 100 further includes a gas permeable membrane 60, the exhaust connector 50 is connected to an end of the connector structure 40 away from the connection tube 30, and the gas permeable membrane 60 is connected to the exhaust connector 50 by ultrasonic welding, so that the gas permeable membrane 60 covers the inside of the exhaust connector 50. Wherein before the medical indwelling needle 100 is used, the air in the whole medical indwelling needle 100 needs to be exhausted to be clean so as to avoid outputting air to the body of a patient, and the clinical risk coefficient of the product is reduced. The exhaust joint 50 is connected to an end of the joint structure 40 away from the connection pipe 30, and the air-passing film 60 is connected to the exhaust joint 50 by ultrasonic welding, so that the air-passing film 60 covers the inside of the exhaust joint 50. Thus, before infusion, air in the catheter hub 10 can be discharged from the air-permeable membrane 60 of the air discharge connector 50 through the connector structure 40, so that air in the whole medical indwelling needle 100 can be discharged, and quick feeding of the liquid medicine into the human body is facilitated. The filtering membrane and the exhaust connector 50 are fixed through ultrasonic welding to improve the pressure resistance of the air passing membrane 60 to blood, so that the air passing membrane 60 is not easy to fall off from the exhaust connector 50, the stability of connection between the exhaust connector 50 and the filtering membrane of the medical indwelling needle 100 is improved, meanwhile, external dust particles are prevented from entering blood, and the safety of the medical indwelling needle 100 to a patient is improved.

The utility model discloses technical scheme medical needle 100 of keeping somewhere is applied to infusion set, this medical needle 100 of keeping somewhere includes catheter seat 10 and needle tubing 20, this catheter seat 10 includes main part section 11 and input section 12, this input section 12 is connected in the lateral wall of main part section 11 to with the inside intercommunication of main part section 11, needle tubing 20 locate in main part section 11 and with the inside intercommunication of main part section 11, needle tubing 20 one end is formed with puncture end 221, puncture end 221 stretches out outside the main part section 11 in order to insert human blood vessel, make catheter seat 10 and human blood vessel intercommunication. The medical indwelling needle 100 further comprises a connecting pipe 30 and a joint structure 40, the connecting pipe 30 is communicated with the input section 12, the joint structure 40 is fixedly sleeved on the connecting pipe 30, an adapter part 43 is formed at one end of the joint structure 40, which is far away from the connecting pipe 30, and the adapter part 43 is used for being connected with an external infusion pipeline or an exhaust joint 50. Because the joint structure 40 is fixed in the connecting pipe 30 through the cup joint and cooperates, this mounting means is convenient and comparatively stable, so that the joint structure 40 is difficult to deviate from the connecting pipe 30, and then make the liquid medicine can loop through the connecting pipe 30 steadily and enter the human blood vessel after the input section 12 and main body segment 11 are interior, and the switching portion 4 of this joint structure 40 both can be connected with outside infusion pipeline and can also be connected with exhaust joint 50 simultaneously, consequently can be directly connected with outside infusion pipeline after dismantling exhaust joint 50 after the exhaust, operating personnel's operating time has been reduced, the installation effectiveness is improved, make medical indwelling needle 100 more convenient and outside infusion articulate, improve the convenience that medical indwelling needle 100 connects.

In an embodiment of the present application, referring to fig. 6, the joint structure 40 further includes a connecting portion 42 and a pressing portion 41, the pressing portion 41 is connected to the adapting portion 43, the connecting portion 42 is connected to one end of the pressing portion 41 departing from the adapting portion 43, the connecting portion 42 is sleeved on an outer wall surface of the connecting pipe 30 departing from one end of the input section 12, and the adapting portion 43, the pressing portion 41 and the connecting portion 42 are sequentially communicated to form a liquid medicine channel. Specifically, the connecting portion 42 and the pressing portion 41 can be an integral structure, which facilitates production, eliminates the installation process, and further ensures the overall stability of the joint structure 40. Meanwhile, the pressing portion 41 is disposed between the adapting portion 43 and the connecting portion 42 for being held by a user, and the connecting portion 42 can be in interference fit with the outer wall surface of the connecting pipe 30 to fix the two.

Further, the center axes of the connecting portion 42, the pressing portion 41, and the pressing portion 41 all coincide; specifically, the central axes of the connecting portion 42, the pressing portion 41 and the pressing portion 41 are overlapped to make the joint structure 40 be linearly disposed, so that the medical staff can conveniently hold the infusion bottle during installation, and the infusion bottle is stable and rapid in direction, thereby improving the stability of the infusion.

Alternatively, the outer wall surface of the pressing portion 41 at the end away from the pressing portion 41 forms a connection thread 431. In this embodiment, the outer side of one end of the pressing portion 41 is provided with a connecting thread 431, and is connected with a pipeline joint thread of an infusion pipeline through the connecting thread 431, so as to realize the connection between the joint structure 40 and an external pipeline joint, and the other end of the pressing portion 41 can be in interference fit with the connecting pipe 30, so that when in use, the joint structure 40 and the catheter seat 10 can be together left at a patient, and when infusion is needed, the joint structure 40 and the external infusion pipeline are connected through threads, that is, a medical worker holds the pressing portion 41 and applies force to rotate, so that the pressing portion 41 can be connected with the external pipeline joint through threads, and connection is realized. Of course, the other end of the pressing portion 41 can also be connected to other devices capable of infusion, so as to achieve the effect of replaceable infusion for multiple times, and will not be described herein.

In an embodiment of the present application, an elastic layer is formed on an outer wall of the pressing portion. So medical personnel are when holding joint design 40, the elastic layer of pressing splenium 41 can be by extrusion deformation, avoided medical personnel to contact the stereoplasm material always and felt uncomfortable distending pain etc. when the operation, it is comparatively convenient laborsaving to make medical personnel operation joint design 40, and simultaneously, because according to splenium 41 by extrusion deformation back, medical personnel and joint design 40's area of contact increase, and then make medical personnel grip joint design 40 more easily, make it comparatively convenient and outside infusion articulate, it is comparatively laborsaving, the convenience of connection is improved.

Further, the pressing portion 41 is defined to have a length direction, and a cross-sectional area of the pressing portion 41 is larger than a cross-sectional area of the connecting portion 42 and a cross-sectional area of the pressing portion 41. Specifically, by making the cross-sectional area of the pressing portion 41 larger than the cross-sectional area of the connecting portion 42 and the cross-sectional area of the pressing portion 41, the user can directly grasp the pressing portion 41 of the joint structure 40, while making the pressing portion 41 of the joint structure 40 sized to ensure the flow rate of the liquid medicine.

Optionally, the joint structure 40 further includes a plurality of anti-slip ribs 411, and the plurality of anti-slip ribs 411 are disposed at intervals along the length direction of the pressing portion 41. Specifically, in order to further prevent medical care personnel from dehydrating when rotating the joint structure 40, the joint structure 40 is provided with the anti-slip ribs 411, so that the friction force between the medical care personnel and the pressing part 41 is improved, and the medical care personnel is not easy to get out of hand and saves labor when rotating. Further, for convenience of production and reduction of production cost, the anti-slip ribs 411 may be integrally disposed with the pressing portion 41, in this embodiment, the anti-slip ribs 411 are long-shaped, and the spacing arrangement direction thereof is the same as the length extension direction of the pressing portion 41, so as to play a role of anti-slip, of course, the anti-slip ribs 411 may also be in other shapes, such as a plurality of dots, and the like, and specifically, the number and size of the anti-slip ribs 411 may also be set according to the specific size of the pressing portion 41, which is not further described herein.

Further, the connection surface of the pressing portion 41 and the connection portion 42 is an arc surface. Wherein in order to avoid the possibility that the relatively sharp edge of the joint structure 40 may cause danger to medical staff, the safety of use is improved, and meanwhile, the contact area of medical staff is also increased by arranging the pressing part 41 and the connecting surface of the connecting part 42 in an arc shape, i.e., the friction force is increased, and the stability during operation is ensured.

In an embodiment of the present application, referring to fig. 5 and 8, the sidewall of the main body segment 11 is provided with a positioning hole 111, the medical indwelling needle 100 further includes a catheter 70, a rubber plug 80 and a fixing member 90, the catheter 70 is connected and communicated with the main body segment 11; the rubber plug 80 is connected in the main body section 11 and is located between the catheter 70 and the positioning hole 111 so as to be used for plugging one end of the main body section 11, which is far away from the catheter 70, and the needle tube 20 is fixed on the rubber plug 80; the fixing member 90 is fixed to the positioning hole 111 of the main body segment 11 in a clamping manner, so as to abut against one side of the rubber plug 80 departing from the conduit 70.

Specifically, the catheter 70 is connected with the catheter seat 10 to form a liquid passing channel, the catheter 70 is directly inserted into a blood vessel of a human body to deliver contrast media, liquid medicine, blood and the like, so as to avoid the need of repeatedly inserting the needle tube 20 into the patient, meanwhile, the side wall of the catheter seat 10 is provided with the positioning hole 111, and the rubber plug 80 is connected into the main body section 11 and is positioned between the catheter 70 and the positioning hole 111, so that one end of the liquid passing channel departing from the catheter 70 can be blocked, so as to avoid the contrast media, the liquid medicine and the blood flowing to the opposite direction of infusion. In addition this fixing member 90 joint is fixed in the locating hole 111 of pipe seat 10 to be used for butt plug 80 to deviate from one side of pipe 70, so can improve the stability after the installation of plug 80, the compressive capacity after the installation of plug 80 has been improved, avoid traditional plug 80 lateral wall point to glue the process simultaneously, carry out the joint through fixing member 90 and not only make things convenient for the installation in earlier stage, and the dismantlement of the later stage maintenance of being convenient for, the production installation effectiveness of medical needle 100 that keeps somewhere has been improved.

Secondly, this mounting 90 includes the section 91 of gripping and the joint section 92 of being connected with the section 91 of gripping, and the one end that the joint section 92 deviates from the section 91 of gripping is equipped with arch 921, and joint section 92 inserts locating hole 111 and makes arch 921 pass locating hole 111, the section 91 of gripping with arch 921 respectively the butt in the surface of the relative both sides wall of main part section 11, be located in pipe seat 10 joint section 92 supports to hold fixedly plug 80 deviates from one side of pipe 70. Specifically, the holding section 91 and the clamping section 92 may be integrated to ensure the stability of the overall structure of the fixing member 90, and of course, they may be connected by screws or other detachable means to facilitate later maintenance and replacement, which may be specifically selected by those skilled in the art. And this joint section 92 is equipped with arch 921, this arch 921 can pass through the locating hole 111 that is located the relative both sides wall of pipe seat 10 under the effect of external force, and make arch 921 can't return in pipe seat 10 under the effect of no external force, should grip section 91 then the butt in pipe seat 10 and the relative another outer wall of arch 921 simultaneously, and then make the joint section 92 holding that is located between section 91 and the arch 921 carry out the butt in order to carry out the plug 80 in pipe seat 10, so that form the card space between section 921 and the section 91 of gripping and fix in the locating hole 111 of main part section 11 with the joint. This installation convenient and fast, operating personnel only need with the arch 921 of mounting 90 pass in proper order be located the locating hole 111 of the relative both sides wall of main part section 11 can, be convenient for medical needle 100 of keeping somewhere integral erection, and then improved medical production installation effectiveness of keeping somewhere needle 100.

The medical indwelling needle 100 further comprises a catheter fixing barrel 90B, wherein the catheter fixing barrel 90B is partially inserted into the main body section 11 and connected with the catheter 70, and the puncturing end 221 of the needle tube 20 sequentially penetrates through the catheter fixing barrel 90B and the catheter 70 and penetrates out of the catheter 70. Specifically, this fixed section of thick bamboo 90B of pipe can be fixed in pipe seat 10 through interference fit, and the outer wall of this fixed section of thick bamboo 90B of pipe can insert the inner wall of pipe 70 and carry out the butt fixed to stability after further improving pipe 70 and installing, the stability of pipe 70 installation when so guaranteeing the infusion, it can be understood that this fixed section of thick bamboo 90B of pipe can be made by metal material such as iron or aluminum alloy, with the stability of guaranteeing the installation of pipe 70, guarantee the life of fixed section of thick bamboo 90B of pipe simultaneously.

In addition, the medical indwelling needle 100 further comprises a puncture-proof cap 90C, wherein in order to prevent the medical indwelling needle 100 from puncturing medical staff when not in use, the puncture-proof cap 90C is sleeved on one end of the catheter base 10, which is far away from the needle base 90D, so that the puncture end 221 is accommodated in the puncture-proof cap 90C, and the medical staff is not easy to contact with the tip of the needle tube 20. The puncture-proof cap 90C may be made of elastic material such as silica gel or rubber, so as to improve the safety of the medical indwelling needle 100.

Further, referring to fig. 9, the needle tube 20 includes a sealing section 21 and a liquid passing section 22 connected to each other, one end of the liquid passing section 22 away from the sealing section 21 forms the puncture end 221, the sealing section 21 is exposed at one side of the fixing member 90 away from the rubber plug 80, the liquid passing section 22 is fixed to the rubber plug 80, the liquid passing section 22 sequentially passes through the fixing member 90, the rubber plug 80 and the catheter 70 and is communicated with the interior of the catheter 70, an inner wall interval of the sealing section 21 is smaller than an inner wall interval of the liquid passing section 22, and the sealing section 21 is used for blocking blood flowing out along one end of the needle tube 20 away from the puncture end 221.

Specifically, the distance between the inner walls of the sealing section 21 is smaller than that of the liquid passing section 22, and the sealing section 21 is used for blocking the blood flowing out along the end of the needle tube 20 away from the puncturing end 221. So through the inner wall interval of direct reduction sealing section 21 with this prevent that blood from following the one end that the needle tubing 20 deviates from puncture end 221 and flowing out to need not some glue or set up other structures and seal, prevent that needle tubing 20 blood from spilling over the risk that deviates from the infusion direction in the use promptly, improve medical needle 100 of keeping somewhere to patient's security, improved the efficiency of medical needle 100 of keeping somewhere manufacturing production simultaneously. In addition, this medical needle 100 that keeps somewhere still includes needle tube seat 90D, and this needle tube seat 90D can be connected in catheter hub 10 department through detachable mode such as threaded connection or joint, when the installation, can install needle tube seat 90D again after catheter hub 10 with accessories such as needle tubing 20 and plug 80 earlier, and convenient installation in earlier stage and the maintenance in later stage are dismantled. Wherein, the sidewall of the liquid passing section 22 is provided with a blood returning port 222, so that after the puncturing end 221 of the needle tube 20 pierces a blood vessel of a human body, the liquid medicine or blood can pass through the blood returning port 222 to pass through the conduit 70 and flow between the liquid passing section 22 and the catheter. The blood return port 222 may have a regular shape such as a rectangle or a square for easy manufacturing.

The utility model discloses still provide an infusion set, this infusion set includes that medical needle 100 and other infusion accessories of keeping somewhere, and this medical concrete structure of keeping somewhere needle 100 refers to above-mentioned embodiment, because this infusion set has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is not given here again.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A medical indwelling needle, comprising:

a connecting pipe, which is communicated with the input section; and

2. The medical indwelling needle according to claim 1, wherein the joint structure further comprises a pressing portion and a connecting portion, the pressing portion is connected to the adapter portion, the connecting portion is connected to an end of the pressing portion away from the adapter portion, the connecting portion is sleeved on an outer wall surface of the connecting tube away from an end of the input section, and the adapter portion, the pressing portion and the connecting portion are sequentially communicated to form a liquid medicine passage.

3. The medical indwelling needle according to claim 2, wherein the central axes of the connecting portion, the pressing portion and the adapter portion all coincide;

and/or the outer wall surface of one end of the adapter part departing from the pressing part forms a connecting thread.

4. The medical indwelling needle according to claim 2, wherein an elastic layer is formed on the outer wall of the pressing portion.

5. The medical indwelling needle according to claim 4, wherein the pressing portion is defined to have a length direction, and a cross-sectional area of the pressing portion is larger than a cross-sectional area of the connecting portion and a cross-sectional area of the adapter portion.

6. The medical indwelling needle according to claim 5, wherein the joint structure further comprises a plurality of anti-slip ribs connected to the surface of the elastic layer and arranged at intervals along the length direction of the pressing portion.

7. The medical indwelling needle according to claim 2, wherein the pressing portion and the connecting surface of the connecting portion are provided in an arc surface.

8. The medical indwelling needle according to any one of claims 1 to 7, wherein the side wall of the main body section is provided with a positioning hole, the medical indwelling needle further comprising:

a conduit connected to and in communication with the main body section;

9. The medical indwelling needle according to claim 8, wherein the needle tube comprises a sealing section and a liquid passing section which are connected, wherein the puncturing end is formed at one end of the liquid passing section facing away from the sealing section, the sealing section is exposed at one side of the fixing member facing away from the rubber plug, the liquid passing section is fixed to the rubber plug, the liquid passing section sequentially passes through the fixing member, the rubber plug and the catheter and is communicated with the interior of the catheter, the inner wall interval of the sealing section is smaller than that of the liquid passing section, and the sealing section is used for blocking blood from flowing out along one end of the needle tube facing away from the puncturing end.

10. An infusion device comprising a medical indwelling needle according to any one of claims 1 to 9.