CN210521493U

CN210521493U - Vein indwelling needle

Info

Publication number: CN210521493U
Application number: CN201920798739.XU
Authority: CN
Inventors: 杜桂琴; 鲍莲华
Original assignee: Chinese PLA General Hospital
Current assignee: Chinese PLA General Hospital
Priority date: 2019-05-30
Filing date: 2019-05-30
Publication date: 2020-05-15
Anticipated expiration: 2029-05-30

Abstract

The utility model provides a needle is kept somewhere to vein, include: the device comprises a needle core, an outer sleeve, a indwelling needle main body, needle wings, a liquid inlet tee joint, a catheter seat and a needle protection cap; the outer tube connected put and stay in the needle main part, the nook closing member sets up to be put and stays in the needle main part, and the spine end of nook closing member runs through and stretches out the outer tube, and the nook closing member that the outer tube stretches out with from the outer tube is planted in the needle protecting cap, the needle wing with the pipe seat branch is put and is being put and stay needle main part both sides, and the nook closing member is being provided with the side opening near pipe seat department, the feed liquor tee bend passes through the pipe and is connected with the pipe seat, is provided with the checkpost on the pipe, is provided with the adapter tube at the tee bend external infusion end of feed liquor the feed liquor end of adapter tube is provided. The vein indwelling needle of the utility model is provided with the negative pressure plugging cap on the joint pipe which is externally connected with the transfusion end, and is fixed on the joint pipe by utilizing the negative pressure adsorption mode to prevent falling off; has good sealing effect and good plugging effect.

Description

Vein indwelling needle

Technical Field

The utility model belongs to the technical field of the medical appliances technique and specifically relates to a needle is kept somewhere to vein.

Background

The vein indwelling needle is also called vein trocar. The core components include a flexible catheter/cannula that can be indwelling in a blood vessel, and a stainless steel puncture guiding stylet. When in use, the catheter and the needle core are punctured into a blood vessel together, after the catheter completely enters the blood vessel, the needle core is withdrawn, and only the soft catheter is left in the blood vessel so as to carry out infusion treatment. Can reduce the pain and fear caused by repeated venipuncture during intermittent, continuous or daily intravenous infusion treatment.

The indwelling needle needs to block and seal the interface of the externally connected transfusion end in the intermittent period after the injection is finished so as to avoid bacterial infection. The common method is to use a movable plug to seal, but the movable plug has the problems of insecurity and easy loosening and falling off, and the safety of the opposite remaining needle causes hidden troubles.

How to firmly and safely temporarily block the infusion end interface is an urgent problem to be solved by the technical personnel in the field.

The information disclosed in this background section is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model aims at providing a vein after improving is put and is detained needle.

In order to achieve the above object, the present invention adopts the following specific technical solutions:

an intravenous indwelling needle, comprising: the device comprises a needle core, an outer sleeve, a indwelling needle main body, needle wings, a liquid inlet tee joint, a catheter seat and a needle protection cap;

the outer sleeve is connected to the indwelling needle main body, the needle core is arranged in the indwelling needle main body, the sharp end of the needle core penetrates through and extends out of the outer sleeve, the outer sleeve and the needle core extending out of the outer sleeve are inserted into the needle protecting cap, the needle wing and the catheter seat are respectively arranged on two sides of the indwelling needle main body, the needle core is provided with a side hole at a position close to the catheter seat, the liquid inlet tee joint is connected with the catheter seat through a catheter, the catheter is provided with a clamp, the external infusion end of the liquid inlet tee joint is provided with a connector pipe, and the liquid inlet end of the connector pipe is provided with a negative pressure plugging cap; wherein the content of the first and second substances,

the negative pressure plugging cap comprises: the plugging cap comprises a plugging cap body, wherein a jack into which a connector pipe is inserted is arranged on the plugging cap body, a partition plate is arranged in the jack and divides the jack into an inner layer and an outer layer, one side close to the bottom of the jack is an inner layer, one side close to an orifice is an outer layer, a movable plug head is arranged on the outer layer of the jack, a first push rod is arranged on the movable plug head and is inserted on the partition plate, the top end of the first push rod penetrates through the partition plate and is positioned on the inner layer, a reset spring is sleeved on the first push rod, one end of the reset spring abuts against the movable plug head, the other end of the reset spring abuts against the lower surface of the partition plate, an arch-shaped spring piece is arranged on the inner layer of the jack, the arch-shaped spring piece, the side wall of the jack and the partition plate form a deformation cavity, an air flow channel connected with the lower layer of the jack is arranged on the side wall of the, and the bottom end of the second push rod is propped against the upper surface of the arched spring plate.

Furthermore, a radially protruding limiting table is arranged on the side wall of the joint pipe.

Furthermore, a protective cover is arranged on the plugging cap body and detachably covers the second push rod.

Further, the protective cover is connected with the plugging cap body through threads.

Furthermore, a sealing groove is formed in the side wall of the lower layer of the jack, and an O-shaped sealing ring is arranged in the sealing groove.

Further, the movable plug head comprises: the sealing plug is arranged on the lower surface of the mounting plate, and the first push rod is fixed on the upper surface of the mounting plate.

Furthermore, the axial section of the sealing plug is T-shaped.

When the transfusion end needs to be blocked, the venous indwelling needle inserts the joint pipe into the jack of the negative pressure blocking cap, the movable plug head is pushed upwards, the first push rod pushes the downwards arched spring piece to deform, so that the spring piece is arched upwards, the volume of a deformation cavity is increased at the moment, negative pressure is generated, the negative pressure acts on the pipe wall of the joint pipe through the air flow channel, and the negative pressure blocking cap is adsorbed on the joint pipe; when negative pressure plugging cap and joint pipe separation need be in order, press the second push rod downwards, promote the spring leaf that upwards arches and take place to deform, arch downwards, and deformation chamber volume resumes to diminish, and the negative pressure disappears, and it can to pull out the negative pressure plugging cap this moment.

Adopt above-mentioned technical scheme, the utility model discloses following beneficial effect has:

the vein indwelling needle of the utility model is provided with the negative pressure plugging cap on the joint pipe which is externally connected with the transfusion end, and is fixed on the joint pipe by utilizing the negative pressure adsorption mode to prevent falling off; has good sealing effect and good plugging effect.

Drawings

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

Fig. 1 is a schematic view of a venous indwelling needle provided by an embodiment of the present invention;

fig. 2 is one of schematic structural diagrams of a negative pressure plugging cap according to an embodiment of the present invention;

fig. 3 is a second schematic structural view of the negative pressure plugging cap according to an embodiment of the present invention;

icon: 1-a needle core; 2-outer sleeve; 3-placing the remaining needle body; 4-side holes; 5-needle wing; 6-a clip; 7-a liquid inlet tee joint; 8-a connector tube; 9-negative pressure plugging cap; 10-plugging cap body; 11-a first push rod; 12-a mounting plate; 13-a sealing plug; 14-a limit table; 15- "O" type seal ring; 16-an airflow channel; 17-a return spring; 18-arch spring leaf; 19-a second push rod; 20-a protective cover; 21-a separator; 22-a catheter hub; 23-needle protection cap; 24-conduit.

Detailed Description

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

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

As shown in fig. 1, fig. 2 and fig. 3, the venous indwelling needle of the present invention includes: the device comprises a needle core 1, an outer sleeve 2, a indwelling needle body 3, needle wings 5, a liquid inlet tee joint 7, a catheter seat 22 and a needle protection cap 23;

the outer sleeve 2 is connected on the indwelling needle main body 3, the stylet 1 is arranged in the indwelling needle main body 3, the sharp-pricked end of the stylet 1 penetrates through and extends out of the outer sleeve 2, the length of the sharp-pricked end of the stylet 1 with an inclined plane is 1.5mm, the extending length of the stylet 1 is 1mm, the hardness of the part of the outer sleeve 2 close to the sharp-pricked end of the stylet 1 is increased, so that the outer sleeve 2 can smoothly penetrate through the blood vessel wall along with the stylet 1, the outer sleeve 2 and the stylet 1 extending out of the outer sleeve 2 are inserted in the needle protecting cap 23, the needle wing 5 and the catheter seat 22 are respectively arranged at two sides of the indwelling needle main body 3, so as to facilitate the hand-held force application, the stylet 1 is provided with a side hole 4 close to the catheter seat 22, the liquid inlet tee 7 is connected with the catheter seat 22 through the catheter 24, the liquid inlet tee 7 is provided with a rotary valve core, the conduction of two liquid inlets and one, in the embodiment, the liquid inlet tee 7 is a disposable medical three-way rotary valve generated by Wahlari medical products Limited, a clamp 6 is arranged on a conduit 24, a connector pipe 8 is arranged at the external infusion end of the liquid inlet tee 7, and a negative pressure plugging cap 9 is arranged at the liquid inlet end of the connector pipe 8; wherein the content of the first and second substances,

the negative pressure plugging cap 9 includes: plugging cap body 10 is provided with on plugging cap body 10 and supplies 8 male jacks of connector pipe, is provided with baffle 21 in the jack, and the baffle 21 separates into the ectonexine with the jack, is close to hole bottom one side and is the inlayer, is close to drill way one side and is outer, is provided with movable chock plug at the skin of jack, and movable chock plug includes: the sealing plug 13, the sealing plug 13 is arranged on the lower surface of the mounting plate 12, the first push rod 11 is fixed on the upper surface of the mounting plate 12, the axial section of the sealing plug 13 is in a T shape, the first push rod 11 is inserted on the partition plate 21, the top end of the first push rod 11 penetrates through the partition plate 21 and is positioned on the inner layer, the first push rod 11 is sleeved with a return spring 17, one end of the return spring 17 abuts against the movable plug head, the other end of the return spring abuts against the lower surface of the partition plate 21, an arch spring piece 18 is arranged on the inner layer of the jack, the arch spring piece 18, the side wall of the jack and the partition plate 21 form a deformation cavity, an air flow channel 16 connected with the lower layer of the jack is arranged on the side wall of the deformation cavity, a second push rod 19 is arranged on the plugging cap body 10, the second push rod 19 is inserted on the inner layer of.

In another preferred scheme, a radially protruding limiting table 14 is arranged on the side wall of the joint pipe 8.

In another preferred embodiment, the blocking cap body 10 is provided with a protective cover 20, and the protective cover 20 is detachably covered outside the second push rod 19.

In another preferred embodiment, the protective cap 20 is connected to the plugging cap body 10 by a screw thread.

In another preferred scheme, a sealing groove is formed in the side wall of the lower layer of the insertion hole, and an O-shaped sealing ring 15 is arranged in the sealing groove.

When the intravenous indwelling needle needs to block the infusion end, the joint tube is inserted into the jack of the negative pressure blocking cap, the movable plug head is pushed upwards, the first push rod pushes the downward arched spring piece to deform, so that the spring piece is arched upwards, the volume of the deformation cavity is increased at the moment, negative pressure is generated, the negative pressure acts on the tube wall of the joint tube through the airflow channel, and the negative pressure blocking cap is adsorbed on the joint tube; when negative pressure plugging cap and joint pipe separation need be in order, press the second push rod downwards, promote the spring leaf that upwards arches and take place to deform, arch downwards, and deformation chamber volume resumes to diminish, and the negative pressure disappears, and it can to pull out the negative pressure plugging cap this moment.

By adopting the technical scheme, the embodiment has the following beneficial effects:

the vein indwelling needle is provided with a negative pressure plugging cap on a connector pipe externally connected with a transfusion end, and is fixed on the connector pipe in a negative pressure adsorption mode to prevent falling off; has good sealing effect and good plugging effect.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. An intravenous indwelling needle, comprising: the device comprises a needle core, an outer sleeve, a indwelling needle main body, needle wings, a liquid inlet tee joint, a catheter seat and a needle protection cap;

2. The intravenous catheter of claim 1 wherein a radially projecting stop is provided on the sidewall of the adapter tube.

3. The intravenous access needle of claim 1 wherein the containment cap body has a protective cover removably disposed over the second pushrod.

4. The intravenous indwelling needle of claim 3, wherein the protective cover is threadably connected to the body of the occlusion cap.

5. The venous indwelling needle of claim 1, wherein a sealing groove is provided in the lower sidewall of the hub, and an "O" ring seal is provided in the sealing groove.

6. The intravenous indwelling needle of claim 1, wherein the movable stopper comprises: the sealing plug is arranged on the lower surface of the mounting plate, and the first push rod is fixed on the upper surface of the mounting plate.

7. The intravenous cannula of claim 6 wherein the axial cross-section of the sealing plug is "T" shaped.