CN101947337A - Closed type detaining needle catheter assembly - Google Patents

Abstract

The invention relates to a device for introducing a medium into a body, in particular to a closed type detaining needle catheter assembly comprising a needle tube, a catheter, a catheter holder and an extending tube joint, wherein the needle tube penetrates through a catheter cavity through a centre shaft of an inner cavity of the catheter holder, and an annular gap cavity is formed between the needle tube and the catheter. The closed type detaining needle catheter assembly is structurally characterized by also comprising an exhaust guide hole, and the exhaust guide hole is arranged on the front end of the catheter holder and communicated with a blood return cavity. The invention has the advantages that the inventor provides the closed type detaining needle catheter assembly capable of enabling transfusion to be fast and convenient by overcoming the technical prejudice of the field; the exhaust guide hole communicated with the blood return cavity is arranged on the front end part of the catheter holder and communicated with an extending tube with an infusion tube during infusion, a gas inside the catheter assembly is fast exhausted to outside through the exhaust guide hole, and infusing fluid can fast enter the catheter assembly through the extending tube for the infusion simultaneously. The invention solves the problems of long-term inconvenient infusion and long waiting time and provides powerful support for medical needle using demands against time.

Description

Enclosed type indwelling needle catheter assembly

Technical field

The present invention relates to a kind ofly medium be introduced intravital device, particularly a kind of closed indwelling needle catheter assembly.

Background technology

In the prior art, enclosed type indwelling needle catheter assembly includes front end and opens the needle tubing of blood back groove, transparent or translucent conduit, catheter block and prolong pipe joint, one end of conduit is connected with catheter block, needle tubing is plugged in the catheter lumen, and between needle tubing wall and the conduit slit is arranged, form a kind of annular chamber; The inner chamber hollow of catheter block, front end leaves blood back cavity, and is connected and is communicated with the prolongation pipe joint, and the rear end then is equipped with batching pig.Prolong pipe joint, blood back cavity by communicating with the external world by the passage of annular chamber, blood back groove, syringe intracavity, needle point interruption-forming in regular turn.In the clinical use, with prolong prolongation pipe that pipe joint the is connected tube for transfusion of plugging in advance, the gas that prolong pipe this moment, prolongs in pipe joint, the blood back cavity must be discharged by the passage that is in communication with the outside, transfusion can enter to prolong and manage, and enter blood back cavity via prolonging pipe joint, infuse then.But owing in the conduit tube component, prolong pipe and blood back cavity and only be the chamber, annulus with the extraneous passage that communicates, passage is too small, and aerofluxus is slow, also can leave the aerofluxus dead angle in the blood back cavity, influences the use of this enclosed type remaining needle.The enclosed type remaining needle also has a kind of structure, and it adopts the needle tubing of no blood back groove, and this remaining needle exhaust passage is littler, and the gas outlet is almost airtight firmly, and it is more inconvenient to use.

Summary of the invention

The objective of the invention is to overcome the deficiencies in the prior art part and provide a kind of easy to use, the enclosed type indwelling needle catheter assembly that aerofluxus is unobstructed.

Enclosed type indwelling needle catheter assembly of the present invention is realized by following approach:

Enclosed type indwelling needle catheter assembly, include needle tubing, conduit, catheter block and prolong pipe joint, one end of conduit is connected with catheter block, needle tubing interts in catheter lumen via catheter block inner chamber axis, and form the chamber, annulus between the conduit, the inner chamber hollow of catheter block, the inner chamber front end leaves blood back cavity, is communicated with conduit, and the rear end is equipped with batching pig, prolong pipe joint and be installed in the catheter block front end, be communicated with blood back cavity, its structural feature is, also includes an aerofluxus guide hole, it is installed in the catheter block front end, and is communicated with blood back cavity.

During use, by prolonging prolongation pipe that pipe joint the connected tube for transfusion of plugging into, can discharge extraneously by the aerofluxus guide hole along with the gas that prolongs pipe, catheter block inner chamber, transfusion enters smoothly and prolongs pipe, and the arrival blood back cavity.Like this, no matter the enclosed type remaining needle adopts the needle tubing of taking back the blood groove or not having the blood back groove, and special-purpose aerofluxus guide hole can be got rid of the air that prolongs in pipe and the conduit tube component rapidly so that transfusion can be fast, carry out easily.

Original enclosed type remaining needle has been reserved with and the extraneous passage that communicates in design, is convenient in the process of transfusion the gas in the conduit tube component be discharged the external world, makes transfusion to enter under external pressure and prolongs pipe, arrives blood back cavity.Such design intrinsic existence in more than ten years long-time, to such an extent as to those skilled in the art this for a long time in, do not go to consider to establish in addition the possibility of exhaust passage to form technology prejudice in the course of time.Designer of the present invention has broken through the technology prejudice of this technical field, in the conduit tube component of enclosed type remaining needle, increased the aerofluxus guide hole, solution is inconvenience aspect transfusion for a long time, and the problem that the waiting time is long provides strong support for what race against time on medical with the pin demand.

The present invention can further be specially:

The aerofluxus barrier film is installed on the aerofluxus guide hole.Or:

In the aerofluxus guide hole venting plug is installed, it is formed every the liquid material by ventilative.

No matter be aerofluxus barrier film or venting plug, all need to possess air permeability and good and, could guarantee deflated smooth and easyly, quick, make transfusion can not go out simultaneously from this aerofluxus guide hole seepage every fluidity.Optimal choice is the medical material that adopts permeable watertight, automatic airtight in a minute behind the chance water, and in infusion process, this aerofluxus guide hole just can be airtight fully, do not influence the carrying out of transfusion like this.

Can be: the area of section of venting plug be greater than the interior area of section of aerofluxus guide hole, and venting plug just is installed in the aerofluxus guide hole in friction tight mode like this.

Can also be: the outlet end at the aerofluxus guide hole be provided with protruding snap ring, with the front end of venting plug clamp at this snap ring, guarantees the fastening installation of venting plug in the aerofluxus guide hole, can not deviate from.

The present invention can also further be specially:

The interior area of section of aerofluxus guide hole is greater than the interior area of section that prolongs pipe.

Like this, can so that conduit tube component and the air that prolongs in the pipe discharge from the aerofluxus guide hole faster.

The axis of aerofluxus guide hole and the axis of catheter block have angle, and with prolong the dual-side that pipe joint is symmetrically distributed in catheter block.

Therefore the installation of aerofluxus guide hole should not influence the normal use of enclosed type remaining needle, and best mode is that it has an axial plane and the axial plane that prolongs pipe joint at grade.

Better mode is that the aerofluxus guide hole is the extension point of prolongation pipe joint axis and the junction point of catheter block inwall with the place of connection of catheter block.

The aerofluxus most critical of enclosed type remaining needle is to prolong the aerofluxus in the pipe joint, and the position arrangement of above-mentioned aerofluxus guide hole can make the air that prolongs pipe and prolong in the pipe joint can discharge extraneous with the fastest speed.

Simultaneously, the height of aerofluxus guide hole should be less than the height that prolongs pipe joint.Under the installation prerequisite that guarantees venting plug, the height of aerofluxus guide hole should be the smaller the better.

In sum, the invention provides and a kind ofly can make the quick and easy enclosed type indwelling needle catheter assembly of transfusion, those skilled in the art overcome technology prejudice, at the leading section of catheter block the aerofluxus guide hole have been installed, and are communicated with blood back cavity in the catheter block inner chamber.When transfusion, be communicated with the prolongation pipe with tube for transfusion, gas in the conduit tube component is discharged extraneous rapidly via the aerofluxus guide hole, transfusion this moment can enter in the conduit tube component via prolonging pipe rapidly, infuse, solution is inconvenience aspect transfusion for a long time, and the problem that the waiting time is long provides strong support for what race against time on medical with the pin demand.

Description of drawings

Figure 1 shows that the structural representation of enclosed type indwelling needle catheter assembly of the present invention;

Below in conjunction with embodiment the present invention is described further

The specific embodiment

Most preferred embodiment

With reference to accompanyingdrawing 1, enclosed type indwelling needle catheter assembly includesneedle tubing 1, conduit 2,catheter block 3, prolongspipe joint 4 andaerofluxus guide hole 5,

One end of conduit 2 is connected withcatheter block 3, andneedle tubing 1 interts in conduit 2 chambeies viacatheter block 3 inner chamber axis, and forms the chamber, annulus between the conduit 2, the inner chamber hollow ofcatheter block 3, the inner chamber front end leavesblood back cavity 9, is communicated with conduit 2, and the rear end is equipped with batching pig 8; Prolongpipe joint 4 and connectprolongation pipe 7, it is installed incatheter block 3 front ends, is communicated withblood back cavity 9.

Aerofluxusguide hole 5 is installed on the junction point of the extension point that prolongspipe joint 4 axis andcatheter block 3 another sidewalls, with prolong the both sides thatpipe joint 4 symmetries andcatheter block 3 are distributed incatheter block 3, simultaneously, the interior area of section ofaerofluxus guide hole 5 is greater than the interior area of section that prolongspipe 7;

Be equipped with in theaerofluxus guide hole 5 and the friction tight venting plug 6 ofguide hole 5 internal diameters, the area of section of venting plug 6 is greater than the interior area of section ofaerofluxus guide hole 5 at this moment, simultaneously, rear side at venting plug 6, the medial wall that is positioned ataerofluxus guide hole 5 is provided with protrudingsnap ring 10, can further guarantee being fastenedly connected of venting plug 6 andaerofluxus guide hole 5.

It is a kind of cylindrical thataerofluxus guide hole 5 can be, or vertebral body, and the axis of its axis andcatheter block 3 has angle, and can be the right angle, promptly is installed on thecatheter block 3 with vertical mode.

During use, tube for transfusion andprolongation pipe 7 are plugged into, open transfuse switch, depress outside, gas in the conduit tube component is discharged extraneous rapidly via the aerofluxus guide hole, transfusion this moment can enter in the conduit tube component via prolonging pipe rapidly, infuses, general needs tens seconds, or even several seconds time got final product.

It is same as the prior art that present embodiment is not stated part.

Claims (9)

1. enclosed type indwelling needle catheter assembly, include needle tubing (1), conduit (2), catheter block (3) and prolongation pipe joint (4), one end of conduit (2) is connected with catheter block (3), needle tubing (1) interts in conduit (2) chamber via catheter block (3) inner chamber axis, and form the chamber, annulus between the conduit (2), the inner chamber hollow of catheter block (3), the inner chamber front end leaves blood back cavity (9), be communicated with conduit (2), the rear end is equipped with batching pig (8), prolong pipe joint (4) and be installed in catheter block (3) front end, and connect prolongation pipe (7), be communicated with blood back cavity (9), it is characterized in that, also include an aerofluxus guide hole (5), it is installed in catheter block (3) front end, and is communicated with blood back cavity (9).

2. enclosed type indwelling needle catheter assembly according to claim 1 is characterized in that, aerofluxus guide hole (5) is gone up the aerofluxus barrier film is installed, and it covers the transverse section of aerofluxus guide hole.

3. enclosed type indwelling needle catheter assembly according to claim 1 is characterized in that, venting plug (6) is installed in the aerofluxus guide hole (5), and it is formed every the liquid material by ventilative, automatic airtight in a minute behind the chance water.

4. enclosed type indwelling needle catheter assembly according to claim 1 is characterized in that the area of section of venting plug (6) is greater than the interior area of section of aerofluxus guide hole (5).

5. enclosed type indwelling needle catheter assembly according to claim 1 is characterized in that, is provided with protruding snap ring (11) at the outlet end of aerofluxus guide hole (5), and venting plug (6) clamp are at the front end of this snap ring (10).

6. enclosed type indwelling needle catheter assembly according to claim 1 is characterized in that, the interior area of section of aerofluxus guide hole (5) is greater than the interior area of section that prolongs pipe (7).

7. enclosed type indwelling needle catheter assembly according to claim 1 is characterized in that, the axis of the axis of aerofluxus guide hole (5) and catheter block (3) has angle, and with prolong the dual-side that pipe joint (4) is symmetrically distributed in catheter block (3).

8. enclosed type indwelling needle catheter assembly according to claim 1 is characterized in that, aerofluxus guide hole (5) is the extension point of prolongation pipe joint (4) axis and the junction point of catheter block (3) inwall with the place of connection of catheter block (3).

9. enclosed type indwelling needle catheter assembly according to claim 1 is characterized in that, the height of aerofluxus guide hole (5) is less than the height that prolongs pipe joint (4).

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