CN213347207U

CN213347207U - Catheter assembly and medical indwelling needle

Info

Publication number: CN213347207U
Application number: CN202021538917.4U
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: 2021-06-04
Anticipated expiration: 2030-07-29

Abstract

The utility model discloses a catheter component and a medical indwelling needle, wherein the catheter component comprises a catheter seat, a catheter, a rubber plug and a fixing piece, and a positioning hole is arranged on the side wall of the catheter seat; the catheter is connected with the catheter seat, and the catheter seat form a liquid passing channel; the rubber plug is connected in the catheter seat and positioned between the catheter and the positioning hole so as to be used for plugging one end of the liquid passing channel, which is far away from the catheter; the fixing piece is clamped and fixed in the positioning hole of the catheter base so as to be used for abutting against one side of the rubber plug, which deviates from the catheter. The utility model discloses technical scheme is when aiming at guaranteeing the pressure resistance of plug and the steadiness after the installation, improves the production installation effectiveness of medical needle of keeping somewhere simultaneously.

Description

Catheter assembly and medical indwelling needle

Technical Field

The utility model relates to the technical field of medical instruments, in particular to catheter subassembly and medical needle of keeping somewhere.

Background

The infusion is that the injection is infused into the human body through intravenous drip, an indwelling needle is needed to be used as a medium in the infusion process, when in use, a catheter and a puncture needle tube are punctured into a vein vessel together, after the catheter enters the vessel, the puncture needle tube is manually withdrawn, and the flexible catheter coated on the outer wall of the puncture needle tube is left in the vessel for infusion, so that the pain caused by repeated puncture of the vein can be reduced by using the indwelling needle, and the workload of medical staff is reduced. However, in the related art, the rubber plug is disposed inside the indwelling needle to prevent blood or medical fluid from flowing in the opposite direction of the infusion, and the rubber plug is usually sealed by bonding or adding a gasket, which is not only inefficient in the installation process, but also easily pops out from the inner cavity of the catheter due to non-uniform bonding or aging of the gel when the medical fluid pressure in the indwelling needle is too high, resulting in a certain risk in the infusion of the indwelling 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 at providing a tubing assembly aims at guaranteeing the pressure resistance of plug and the steadiness after the installation, improves the production installation effectiveness of medical needle of keeping somewhere simultaneously.

To achieve the above object, the present invention provides a catheter assembly comprising:

the side wall of the catheter seat is provided with a positioning hole;

a conduit connected to the conduit base, the conduit and the conduit base forming a fluid-passing channel;

the rubber plug is connected in the catheter seat and positioned between the catheter and the positioning hole so as to be used for plugging one end of the liquid passing channel, which is far away from the catheter; and

the fixing piece is clamped and fixed in the positioning hole of the catheter base and used for abutting against one side, deviating from the catheter, of the rubber plug.

In an embodiment of the application, the positioning hole penetrates through two opposite side walls of the catheter base, one end of the fixing piece penetrates through the positioning hole and is clamped and fixed on the outer wall of the catheter base, and part of the fixing piece is located in the catheter base and used for abutting against one side, away from the catheter, of the rubber plug.

In an embodiment of this application, the mounting including the section of gripping and with the joint section that the section of gripping is connected, the joint section deviates from the one end of the section of gripping is equipped with the arch, the joint section inserts the locating hole makes the arch passes the locating hole, the section of gripping with the arch respectively the butt in the surface of the relative both sides wall of pipe seat is located in the pipe seat the joint section is supported and is held fixedly the plug deviates from one side of pipe.

In an embodiment of the application, the surface of the protrusion facing the grip section forms a mating surface, which is arranged to fit with an outer surface of the sidewall for the catheter hub.

In an embodiment of the application, the number of the clamping sections is multiple, and the clamping sections are connected to the holding section and arranged at intervals.

In an embodiment of the application, the holding section is defined to have a length direction, and the plurality of clamping sections are arranged at intervals along the length direction.

In an embodiment of the application, a surface of the protrusion, which faces away from the holding section, is formed with a guiding inclined surface, and the guiding inclined surface is used for guiding the protrusion to pass through to the positioning hole.

In an embodiment of this application, the catheter subassembly still includes the fixed section of thick bamboo of pipe, the fixed section of thick bamboo of pipe install in the pipe seat to be located and deviate from the one end of mounting, the fixed section of thick bamboo of pipe be used for with pipe connection, medical needle of keeping somewhere still includes needle tubing and needle tube seat, the needle tube seat is connected in the pipe seat, the needle tubing connect in the needle tube seat, and with the liquid passageway switches on, the needle tubing has the puncture end, the puncture end passes in proper order the fixed section of thick bamboo of pipe with the pipe.

In an embodiment of the present application, the catheter assembly further includes a connecting pipe, an extension pipe is connected to an outer side wall of the catheter base, the extension pipe is located between the rubber plug and the catheter and is communicated with the liquid passing channel, the connecting pipe is connected to the extension pipe, and the connecting pipe is connected to an external liquid infusion connector.

The utility model discloses still provide a medical needle of keeping somewhere, including the tubing assembly, the tubing assembly includes:

the side wall of the catheter seat is provided with a positioning hole;

The catheter component of the technical proposal of the utility model is applied to the medical indwelling needle, the catheter component comprises a catheter seat and a catheter, the catheter is connected with the catheter seat and forms a liquid passing channel,

meanwhile, the side wall of the catheter base is provided with a positioning hole, the catheter component further comprises a rubber plug and a fixing piece, the rubber plug is connected in the catheter base and located between the catheter and the positioning hole, and therefore one end, deviating from the catheter, of the liquid passing channel can be plugged, so that the contrast agent, the liquid medicine and the blood flow direction are prevented from being opposite to the infusion direction. In addition this mounting joint is fixed in the locating hole of pipe seat to be used for the butt plug to deviate from one side of pipe, so can improve the stability after the plug installation, improved the compressive capacity after the plug installation, avoid traditional plug lateral wall to glue the process simultaneously, carry out the joint through the mounting and not only make things convenient for the installation in earlier stage, and the later maintenance's of being convenient for dismantlement has improved the production installation effectiveness of medical needle of keeping somewhere.

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 view of an embodiment of a catheter assembly of the present invention;

fig. 2 is a schematic cross-sectional view of a catheter assembly of the present invention;

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

fig. 4 is a schematic diagram of an exploded view of the inventive catheter assembly;

fig. 5 is a schematic view of a fixing member of the catheter assembly of the present invention;

fig. 6 is a schematic view of a catheter hub of the catheter assembly of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				1000	Medical indwelling needle	4211	Adaptive surface
100	Catheter assembly	4212	Guide slope
				10	Conduit seat	50	Catheter fixing cylinder
11	Locating hole	60	Connecting pipe
				12	Extension pipe	200	Needle tube
20	Catheter tube	201	Puncture tip
				30	Rubber plug	300	Needle tube holder
40	Fixing piece	400	Liquid stopping clip
				41	Holding section	500	Conical joint
42	Clamping section	600	Exhaust joint
				421	Projection	700	Puncture-proof cap

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 catheter assembly 100, which is applied to a medical indwelling needle 1000.

Referring to fig. 1 to 4, in the embodiment of the present invention, the catheter assembly 100 includes a catheter holder 10, a catheter 20, a rubber plug 30, and a fixing member 40, wherein a positioning hole 11 is formed in a side wall of the catheter holder 10; the catheter 20 is connected with the catheter holder 10, and the catheter 20 and the catheter holder 10 form a liquid passing channel; the rubber plug 30 is connected in the catheter seat 10 and is positioned between the catheter 20 and the positioning hole 11 so as to block one end of the liquid passing channel, which faces away from the catheter 20; the fixing member 40 is fixed to the positioning hole 11 of the catheter base 10 in a clamping manner, so as to abut against one side of the rubber plug 30 facing away from the catheter 20.

Wherein, this plug 30 can adopt elastic material such as silica gel or rubber to make, through interference fit butt in the inner wall of pipe seat 10 in order to guarantee sealed effect. The catheter 20 can be fixed on the catheter base 10 in a detachable manner such as clamping or interference fit, so that the installation and production in the early stage and the maintenance and disassembly in the later stage are facilitated. The positioning hole 11 may be a square hole or a circular hole, so that the fixing member 40 can pass through the positioning hole, and at least a portion of the fixing member 40 is accommodated in the catheter hub 10 to abut against one side of the rubber plug 30 departing from the catheter 20.

The utility model discloses technical scheme's catheter subassembly 100 is applied to medical indwelling needle 1000, and this catheter subassembly 100 includes catheter holder 10 and pipe 20, and this pipe 20 is connected with catheter holder 10 and forms the liquid passageway, and pipe 20 directly inserts into human blood vessel defeated contrast medium, liquid medicine, blood etc.. Meanwhile, the side wall of the catheter holder 10 is provided with a positioning hole 11, the catheter assembly 100 further comprises a rubber plug 30 and a fixing part 40, the rubber plug 30 is connected in the catheter holder 10 and is positioned between the catheter 20 and the positioning hole 11, so that one end of the liquid passing channel deviating from the catheter 20 can be blocked, and the contrast agent, the liquid medicine and the blood are prevented from flowing to the opposite direction of the transfusion. In addition this mounting 40 joint is fixed in the locating hole 11 of pipe seat 10 to be used for butt plug 30 to deviate from one side of pipe 20, so can improve the stability after the installation of plug 30, the compressive capacity after the installation of plug 30 has been improved, avoid traditional plug 30 lateral wall point to glue the process simultaneously, carry out the joint through mounting 40 and not only make things convenient for the installation in earlier stage, and the dismantlement of the later stage maintenance of being convenient for, improved the production installation effectiveness of medical needle 1000 that keeps somewhere.

Referring to fig. 1 to 6, in an embodiment of the present application, the positioning hole 11 penetrates through two opposite sidewalls of the catheter hub 10, one end of the fixing element 40 penetrates through the positioning hole 11 and is fastened to the outer wall of the catheter hub 10 in a snap-fit manner, and a portion of the fixing element 40 is located in the catheter hub 10 to abut against a side of the rubber plug 30 facing away from the catheter 20. Wherein through the both sides wall that runs through pipe seat 10 with locating hole 11 to make mounting 40 can pass the relative both sides of pipe seat 10, not only installation easy operation can improve the stability behind the mounting 40 joint simultaneously, increased in addition with plug 30 area of contact, and then further improved the stability of propping to holding plug 30. Of course, the positioning hole 11 may be opened only on one side of the catheter base 10, and a fixing groove is concavely formed on the inner wall of the catheter base 10, so that the fixing member 40 is clamped in the positioning hole 11, and one end of the fixing member 40 can pass through the positioning hole 11 and be embedded in the groove, which can also improve the stability of the fixing member 40 after being clamped, and specifically can be selected by those skilled in the art, and will not be described herein.

Further, the fixing member 40 includes a holding section 41 and a clamping section 42 connected to the holding section 41, a protrusion 421 is disposed at one end of the clamping section 42 away from the holding section 41, the clamping section 42 is inserted into the positioning hole 11 and the protrusion 421 passes through the positioning hole 11, the holding section 41 and the protrusion 421 respectively abut against outer surfaces of two opposite side walls of the catheter base 10, and the clamping section 42 located in the catheter base 10 abuts against and fixes one side of the rubber plug 30 away from the catheter 20. Specifically, the holding section 41 and the clamping section 42 may be an integral structure to ensure the stability of the overall structure of the fixing member 40, and of course, they may also be connected by a detachable manner such as a screw, etc. to facilitate later maintenance and replacement, which may be specifically selected by those skilled in the art. The clamping section 42 is provided with a protrusion 421, the protrusion 421 can pass through the positioning holes 11 on the two opposite side walls of the catheter base 10 under the action of external force, and the protrusion 421 cannot retract into the catheter base 10 under the action of no external force, and the holding section 41 abuts against the other outer wall surface of the catheter base 10 opposite to the protrusion 421, so that the clamping section 42 between the holding section 41 and the protrusion 421 is accommodated in the catheter base 10 to abut against the rubber plug 30, and thus a clamping space is formed between the protrusion 421 and the holding section 41 to be clamped and fixed in the positioning holes 11 of the catheter base 10. This installation process convenient and fast, operating personnel only need with the protruding 421 of mounting 40 pass in proper order be located the locating hole 11 of the relative both sides wall of pipe seat 10 can, the catheter subassembly 100 of being convenient for is installed, and then has improved the production installation effectiveness of medical indwelling needle 1000.

Further, the surface of the protrusion 421 facing the grip segment 41 forms a fitting surface 4211, and the fitting surface 4211 is configured to fit with the outer surface of the sidewall of the catheter hub 10. In order to further improve the stability of the fixing element 40 after installation, the surface of the protrusion 421 facing the holding section 41 forms an adapting surface 4211, and the adapting surface 4211 is attached to the outer surface of the sidewall of the catheter hub 10, so that the contact area between the protrusion 421 and the outer wall surface of the catheter hub 10 can be increased, and further the friction force is further increased, so as to ensure the stability of the fixing element 40 after installation. In this embodiment, the catheter hub 10 is cylindrical, so that the adapting surface 4211 is a circular arc surface, which can be attached to the outer wall of the catheter hub 10, thereby ensuring the installation stability of the fixing member 40.

In an embodiment of the present application, referring to fig. 5, the number of the clamping sections 42 is multiple, and a plurality of the clamping sections 42 are connected to the holding section 41 and are arranged at intervals. In order to improve the stability of the installation of the fixing member 40, a plurality of clamping sections 42 may be arranged to pass through the positioning holes 11 to improve the stability after clamping. Meanwhile, the plurality of clamping sections 42 are arranged at intervals, so that the fixing part 40 can be conveniently installed by an operator in a labor-saving manner. Furthermore, since the medical indwelling needle 1000 is generally provided with the needle tube 200 for puncturing a blood vessel of a human body, in order to prevent the fixing member 40 from obstructing the installation of the needle tube 200, the plurality of catching sections 42 are spaced apart to leave a gap for the needle tube 200 to pass through. It should be noted that the protrusions 421 of each clamping section 42 can be located on the same side for easy production, and the protrusions 421 of adjacent clamping sections 42 can be arranged in different directions to make the force applied to the fixing member 40 uniform when the fixing member is installed. The specific number of snap segments 42 can be selected by one skilled in the art and will not be described further herein.

Further, the holding section 41 is defined to have a length direction, and a plurality of the clamping sections 42 are arranged at intervals along the length direction. Specifically, the length direction of the holding section 41 is the same as the direction of the plurality of clamping sections 42 at intervals, so that an operator can easily grab the holding section 41 for installation, and the fixing member 40 is integrally arranged in a flat block shape, thereby facilitating production.

In an alternative embodiment, referring to fig. 5, a guiding inclined plane 4212 is formed on a surface of the protrusion 421 facing away from the holding section 41, and the guiding inclined plane 4212 is used for guiding the protrusion 421 to pass through to the positioning hole 11. The guiding inclined plane 4212 is arranged obliquely along the insertion direction, so that when the protrusion 421 contacts with the outer wall of the catheter hub 10, the protrusion 421 moves along the direction away from the positioning hole 11 due to the oblique angle of the guiding inclined plane 4212, and the protrusion 421 can pass through the positioning hole 11 more easily, so that the fixing element 40 can be installed, and the installation efficiency of the fixing element 40 is further improved.

In an embodiment of the present application, referring to fig. 2 to 4, the catheter assembly 100 further includes a catheter fixing cylinder 50, the catheter fixing cylinder 50 is installed in the catheter hub 10 and located at an end away from the fixing member 40, the catheter fixing cylinder 50 is used for connecting with the catheter 20, the medical indwelling needle 1000 further includes a needle tube 200 and a needle tube holder 300, the needle tube holder 300 is connected to the catheter hub 10, the needle tube 200 is connected to the needle tube holder 300 and is conducted to the fluid passing channel, the needle tube 200 has a puncturing end 201, and the puncturing end 201 sequentially passes through the catheter fixing cylinder 50 and the catheter 20. Specifically, the catheter fixing barrel 50 may have a funnel shape, the joint of the catheter hub 10 is matched with the catheter fixing barrel 50, and the needle hub 300 is used for fixing the needle tube 200 to ensure the stacking stability of the needle tube 200 when inserted into a blood vessel of a human body. Thereby the fixed section of thick bamboo 50 of pipe can be fixed in the pipe seat 10 through interference fit, and when the outer wall of pipe 20 and the inner wall interference fit butt of pipe seat 10, the outer wall of this fixed section of thick bamboo 50 of pipe can insert the inner wall of pipe 20 and carry out the butt fixed, with the stability after further improving the pipe 20 installation, the stability of pipe 20 installation when so guaranteeing the infusion, it can be understood that, this fixed section of thick bamboo 50 of pipe can be made by metal material such as iron or aluminum alloy, in order to ensure the stability of pipe 20 installation, guarantee the life of fixed section of thick bamboo 50 of pipe simultaneously.

In an embodiment of the present application, referring to fig. 1 to 4, the catheter assembly 100 further includes a connection tube 60, an extension tube 12 is connected to an outer sidewall of the catheter holder 10, the extension tube 12 is located between the rubber plug 30 and the catheter 20 and is in communication with the fluid passing channel, the connection tube 60 is connected to the extension tube 12, and the connection tube 60 is connected to an external infusion connector. Wherein the extension tube 12 is connected to the liquid passage so as to allow external liquid medicine to flow into the liquid passage through the extension tube 12, and the extension tube 12 and the catheter hub 10 can be integrated to ensure stability during infusion. While extension tube 12 is angled away from catheter hub 10 to facilitate connection with connection tube 60. Meanwhile, the medical indwelling needle 1000 is further provided with a liquid stopping clip 400 connected to the connecting tube 60 for opening or closing the circulation of the liquid medicine in the connecting tube 60 to better treat the patient. In addition, the medical indwelling needle 1000 may further include a conical joint 500 and an exhaust joint 600, the conical joint 500 is connected to an end of the connecting tube 60 away from the extension tube 12, so that the medical staff can seal and place the extension tube 12 conveniently. The air exhaust joint 600 is connected to one end of the conical joint 500 away from the connecting tube 60, so as to exhaust air from the interior of the medical indwelling needle 1000 before the medical indwelling needle 1000 starts to be used, and to remove excess air in the tube, so as to ensure the normal use of the medical indwelling needle 1000.

The utility model discloses still provide a medical needle 1000 of keeping somewhere, this medical needle 1000 of keeping somewhere includes catheter subassembly 100 and other infusion accessories, and above-mentioned embodiment is referred to this catheter subassembly 100's concrete structure, because this medical needle 1000 of keeping somewhere 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 no longer given here. The medical indwelling needle 1000 further comprises a puncture-proof cap 700, wherein the puncture-proof cap 700 is sleeved at one end of the catheter base 10 departing from the needle tube base 300, so that the puncture end 201 is accommodated in the puncture-proof cap 700. In order to prevent the medical indwelling needle 1000 from stabbing medical staff when not in use, the puncture preventing cap 700 is sleeved on one end of the catheter holder 10 away from the needle holder 300, so that the puncture end 201 is accommodated in the puncture preventing cap 700, and the medical staff is not easy to contact the tip of the needle tube 200. The puncture-proof cap 700 may be made of elastic material such as silica gel or rubber, so as to improve the safety of the medical indwelling needle 1000.

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 catheter assembly for use with a medical indwelling needle, comprising:

the side wall of the catheter seat is provided with a positioning hole;

2. The catheter assembly of claim 1, wherein the positioning hole extends through two opposite side walls of the catheter hub, and one end of the fixing member extends through the positioning hole and is clamped and fixed on the outer wall of the catheter hub, so that part of the fixing member is positioned in the catheter hub and is used for abutting against one side of the rubber plug, which faces away from the catheter.

3. The catheter assembly of claim 2, wherein the fixing member comprises a holding section and a clamping section connected to the holding section, a protrusion is disposed at an end of the clamping section away from the holding section, the clamping section is inserted into the positioning hole and allows the protrusion to pass through the positioning hole, the holding section and the protrusion are respectively abutted against outer surfaces of two opposite side walls of the catheter base, and the clamping section located in the catheter base is abutted against and fixes a side of the rubber plug away from the catheter.

4. The catheter assembly of claim 3, wherein a surface of the protrusion facing the gripping section forms a mating surface that is configured to fit snugly with an outer surface of a sidewall for the catheter hub.

5. The catheter assembly of claim 3, wherein the number of clamping segments is multiple, and multiple clamping segments are connected to the gripping segment and spaced apart.

6. The catheter assembly of claim 5, wherein the gripping section is defined to have a length direction, and a plurality of the clamping sections are spaced apart along the length direction.

7. The catheter assembly of claim 3, wherein a surface of the protrusion facing away from the gripping section is formed with a guide ramp for guiding the protrusion through to the positioning hole.

8. The catheter assembly of any one of claims 1 to 7, further comprising a catheter securement barrel mounted within the catheter hub at an end facing away from the anchor, the catheter securement barrel configured to be coupled to the catheter, the medical indwelling needle further comprising a needle cannula and a needle hub, the needle hub coupled to the catheter hub, the needle cannula coupled to the needle hub and in fluid communication with the fluid passage, the needle cannula having a piercing end that passes through the catheter securement barrel and the catheter in sequence.

9. The catheter assembly as claimed in any one of claims 1 to 7, further comprising a connection tube, wherein an extension tube is connected to an outer side wall of the catheter holder, the extension tube is located between the rubber plug and the catheter and is communicated with the fluid passing channel, the connection tube is connected to the extension tube, and the connection tube is connected to an external infusion connector.

10. A medical indwelling needle comprising the catheter assembly according to claims 1 to 9.