CN202538063U - Catheter and introducing needle component - Google Patents

Abstract

The present application provides a catheter and introducing needle component which comprises a catheter seat, a catheter, an introducing needle and an extension tube, wherein the catheter is connected to one end of the catheter seat; the introducing needle is positioned in the catheter; the extension tube is connected to the lateral opening of the catheter seat; the introducing needle is provided with a groove and an extrusion bulge; and the extension tube is made of a polyurethane material.

Description

Conduit and introducing needle assembly

Technical field

The application relates to conduit and introduces needle assembly.

Background technology

Catheter in blood vessel, particularly venous duct are normally used for importing liquid to patient, such as common saline solution, various medicine and injection nutriment etc., perhaps are used in the patient body, extracting blood.The tip venous duct is shorter usually, and size is probably at two inches or shorter.The conduit of common type is to be enclosed within a tip venous duct of introducing on the pin.This tip venous duct of introducing on the pin that is enclosed within is to be assemblied on the introducing pin that has a sharpened tip.Conduit is assembled into the needle point that the needle point of introducing pin extends beyond conduit with the introducing pin, and the inclined plane of introducing pin needle tip up.

Conduit with introduce needle assembly and pierced through patient's skin and enter into peripheral vessel with a shallow angle, described peripheral vessel does not directly link to each other with heart, but one of central vessel branch that directly links to each other with heart is continuous.In a kind of therein technology, introduce pin and conduit and penetrated in the blood vessel fully together.And in other a kind of technology, introduce pin and after the venipuncture of beginning, partly extracted out from conduit.Then, conduit is inserted in the blood vessel fully.

After conduit and introducing needle assembly were inserted in the blood vessel, important was to need to confirm whether this assembly be in correct positioning in blood vessel.Therefore, whether the medical worker need confirm in introducing pin, to have backflow blood to exist.In order to confirm whether correctly location of said assembly, introduce pin and can on its distal portions, be provided with a groove or opening, like this, when conduit is processed by transparent or semitransparent material, can in the annular space of introducing between pin and the conduit, observe blood and reflux.In case correct positioning is able to confirm that the medical worker will be through pressing patient's skin downwards at the most advanced and sophisticated position of introducing pin and conduit tube component and blood vessel being exerted pressure.The pressure of finger passes through to introduce pin with the further blood flow of obturation.The medical worker extracts the introducing pin out and conduit is stayed the original place, then liquid transporting apparatus perhaps is connected to conduit with skull such as the unfractionated heparin medicated cap.Extract out from conduit in case introduce pin, it will have " needle point of being infected with blood ", must correctly dispose.

In recent years, the patient of blood possibly be infected with to(for) the medical worker has had very large concern, has realized that " needle point of being infected with blood " must dispose immediately.This concern is increasing, because the fatal disease that can't treat at present occurred, such as, AIDS (AIDS), these diseases possibly be delivered to the another one people from one by the infected through the exchange of body fluid.Therefore, contact and to avoid with AIDSinfected patient's body fluid.That kind as mentioned above has been used to a conduit is placed in AIDSinfected patient's the blood vessel if introduce pin, and this introduces the media that pin is exactly the transmission disease so.Need correct handling " to be infected with the needle point of blood " although the medical worker has known, unfortunately under some medical environment, such as in emergency circumstances or owing to be not careful or neglect, still exist the situation that the introducing pin be infected with stabs the medical worker.

In order to solve the problem that above-mentioned quilt " needle point that blood is infected with " accident is stung, developed various safe conduits and introduced needle assembly.These conduits are provided with alligator clamp or pin cover with the introducing needle assembly, and these alligator clamps or pin can be held on the needle tip of introducing pin after covering on and introducing the pin extraction, thereby prevent that the medical worker from touching needle point.

The existing introducing pin that has the backflow groove is provided with an iron hoop, this iron hoop than said backflow groove more near needle point.When the introducing pin was extracted out from conduit, this iron hoop will stop that needle point shifts out outside said alligator clamp or the pin cover.By this way, needle point will be protected in alligator clamp or the pin cover.US5215528 discloses this safety catheter and one of document of introducing needle assembly.

Yet the existing introducing pin that has backflow groove and iron hoop manufactures relatively expensive, because need independent step that said iron hoop is installed on the said introducing pin.The shortcoming on cost, also has two other problem.A potential problem is exactly to introduce pin toward introducing in the technical process bonding on the pin needle stand, need bonding agent will introduce pin and bond on the introducing pin needle stand, and bonding agent may stop up said backflow groove or needle point opening.The potential problem of another one is that said iron hoop can reduce conduit cavity inevitably and introduce the annular space size between the pin, and this to reduce poorly to make in the backflow groove that observed blood refluxes slack-off, even does not reflux at all.

The utility model content

The application's one side provides a kind of conduit and has introduced needle assembly, and it comprises: catheter block; Conduit is connected to an end of catheter block; Introduce pin, be contained in the conduit; And extension, be connected to the lateral port of catheter block, wherein, the direction finding mouth is communicated with the catheter block fluid, and extension is to process with polyurethane (Polyurethane) material, introduces pin and is provided with groove and expression lobes.

Preferably, said groove than said expression lobes more near the needle point of introducing pin.

Said expression lobes through with the perpendicular Y axis of the longitudinal axis of said introducing pin on the said introducing pin of extruding form; Thereby make the material of introducing pin with the perpendicular X axis of the longitudinal axis of said introducing pin and said Y axis on flow and form this expression lobes, the inner chamber of said introducing pin becomes flat through said extruding.

Among embodiment, the cross section of said expression lobes is a dumbbell shape therein.

Said dumb-bell shape convexity is through locating extruding or this introducing pin offolder forms 2 of said introducing pin, said 2 line intersects with the longitudinal axis of said introducing pin.

In another embodiment, the cross section of said expression lobes is an elliptical shape.

Said oval-shaped expression lobes is pushed said introducing pin by two plane surfaces and is formed.

To carry out detailed description explanation to the application with reference to the most preferred embodiment shown in the accompanying drawing hereinafter.

Description of drawings

Fig. 1 has showed that schematically the application introduces the convexity that the extruding of pin forms and the arrangement of blood backflow groove.

Fig. 2 a-2d has showed schematically the application's introducing pin is how to be extruded to form said convexity.

Fig. 3 has showed that bonding agent flow into introducing pin needle stand and introduces in the pin.

Fig. 4 has schematically showed the application's conduit and the overall structure of introducing needle assembly.

The specific embodiment

In this article, term " near-end " and " far-end " are used to describe the position on the introducing pin, and they are said with respect to the medical worker under this farthest state of medical worker that uses conduit and introducing needle assembly at the needle point of introducing pin.

Fig. 1 schematically shows a conduit and a part of introducing needle assembly that has according to the introducing pin of the application embodiment.Conduit has been inserted in patient's the blood vessel with the introducing needle assembly in Fig. 1.As shown in Figure 1,conduit 2 is enclosed within the outside of introducing pin 1.Conduit by transparent or at least trnaslucent materials process.Introduce pin 1 and have and be used to observe thegroove 3 and expression lobes 4 that blood refluxes, in an embodiment,groove 3 than expression lobes more near the needle point of introducing pin.In use, after conduit and introducing needle assembly were inserted in the blood vessel, the medical worker must confirm whether this assembly correctly locatees in blood vessel, that is, whether the medical worker confirms in introducing pin, to have the backflow of blood to take place.In Fig. 1, showing blood by the arrow shown in the label 5 refluxes in introducing pin.Because conduit is transparent or is translucent at least, refluxes so in the annular space of introducing between pin and the conduit cavity, can observe blood.In case the correct location of conduit is able to confirm that the medical worker just depresses patient's skin through the distal site place at conduit and patient's blood vessel is exerted pressure.The further blood that the pressure of this finger will block through introducing pin refluxes.Then, the medical worker extracts the introducing pin out, and conduit is stayed the there.Above-mentioned obstruction also can pass through other device or means realization, such as, with introducing in the needle assembly batching pig (septum) is set at conduit.

Fig. 2 a-2d illustrates the expression lobes 4 that the application introduces pin and how to process.Fig. 2 a shows the top view of introducing pin 1, and the opening ofgroove 3 is positioned at the top of introducing pin 1.Fig. 2 b is for introducing the side view of pin 1.The cutaway view that Fig. 2 c cuts open along the hatching line A-A among Fig. 2 b for the expression lobes 4 of one of them embodiment of the application.The cutaway view that Fig. 2 d cuts open along the hatching line A-A among Fig. 2 b for the expression lobes 4 of the application's another one embodiment.

Describe for ease, it is necessary setting up a coordinate system.With reference to Fig. 2 a, the X axis along from the bottom of page to the direction at top, and the Y axis normal is in the direction of page.

Shown in Fig. 2 c-2d, the application's introducing pin 1 is squeezed on the Y axis, and the material that is squeezed flows on the X axis direction, thereby on the X axis direction, obtains the convexity that extruding forms.Introduce the inner chamber 9 of pin 1 because this squeezing action becomes flat.

Fig. 2 d illustrates one of them embodiment of the application, in this embodiment, pushes the convexity 4 that forms and forms through locating to push or press from both sides introducing pin 1 at 2.The continuous axis that forms of said two points must intersect with the longitudinal axis of introducing pin 1.Because extruding or the effect of pressing from both sides, the cylinder of introducing pin just obtains the variation on a kind of dimension, that is to say, the cylinder of introducing pin compresses through extruding and forms a dumbbell shape convexity, and the change on this dimension is symmetric.After having done like this, the inner chamber 9 of introducing pin just becomes flat, and the material that is compressed simultaneously is toward two side flow, owing to the conservation of mass forms dumb-bell shape.

Shown in Fig. 2 c, in the application's another one embodiment, can push and form the expression lobes that shape of cross section is an elliptical shape introducing pin through two planes rather than above-mentioned 2.

Preferably, be used to observegroove 3 that blood refluxes than expression lobes 4 more near the needle point of introducing pin.Like this, expression lobes 4 will have two functions.A function is to prevent that as stop device the needle point of introducing pin from shifting out outside alligator clamp or the pin cover (not shown).The another one function is when using bonding agent will introduce pin and introduce pin needle stand 6 and be bonded together, and expression lobes 4 becomes flat inner chamber can prevent that bonding agent from flowing in thegroove 3 of introducing pin its obstruction, and this will further describe with reference to accompanyingdrawing 3 hereinafter.

What deserves to be mentioned is that the annular space between the outer surface of the inner chamber ofconduit 2 and introducing pin 1 should be enough to make backflow blood to flow fast, and should not damage this flowing owing to the existence of expression lobes 4.

The introducing pin 1 that is used for the having of theapplication groove 3 that blood refluxes and expression lobes 4 is compared with introducing pin of the prior art has several advantages.

In the introducing pin that has the backflow groove of prior art, adopt iron hoop as stop device, this iron hoop must be than said backflow groove more near the needle point of introducing pin.Otherwise, if the backflow groove than said iron hoop near needle point, this iron hoop will stop up at the blood return flow path of introducing between pin and the conduit cavity owing to have round cross section so, refluxes thereby cause taking place blood.

In addition, of Fig. 3, in the assembling process of introducing pin 1 and introducing pin needle stand 6, need they be bonded together along location assignment bonding agent shown in the arrow 7.Therefore; In order to prevent that bonding agent from flowing into the inner chamber of introducing pin and blockingbackflow groove 3 from the direction shown in thearrow 8; In the technology of prior art, must there be an extruding to introduce the step of the near-end of pin, will prevents that like this bonding agent from flowing in the inner chamber of introducing pin.

Yet, in the introducing pin 1 of the application embodiment, preferably, the position ofgroove 3 is arranged to than expression lobes 4 more near needle point.Like this, because expression lobes 4 has the cross-sectional area of flattening, so it can not block at the blood current return circuit of introducing between pin and the conduit.As shown in Figure 1, the application's this introducing needle construction will be optimized blood and reflux, and make it flow to near-end fromgroove 3 swimmingly, flow through expression lobes 4 therebetween.

Last but be not least important, as shown in Figure 3, in introducing pin 1 and the assembling process of introducing pin needle stand 6, need dispensed adhesive to come bonding introducing pin 1 and introduce pin needle stand 6.Therefore, just exist potential danger that bonding agent is flow in the inner chamber of introducing pin 1, thereby poorly stop upgroove 3, thereby also just stopped up the backflow of blood.Described like preceding text, and in the prior art, needed an extra step solve bonding agent and flow into inner chamber this problem of introducing pin 1.Yet in this application, this extra step does not need because the flattening inner chamber of expression lobes 4 will limit that bonding agent flow to groove 3 with its obstruction.Therefore, the application's expression lobes 4 will have two functions.A function is to have played the effect of iron hoop stop device in the prior art, and it has prevented that introducing pin 1 from shifting out outside alligator clamp or the pin cover, and the another one function is exactly the effect of bonding agent obstacle, and it has played the effect of the near-end of warp extruding in the prior art.Therefore, the application's expression lobes 4 is more cheap with respect to iron hoop infrastructure cost of the prior art.

What deserves to be mentioned is, although the position ofgroove 3 and expression lobes 4 can put upside down, that is, and expression lobes 4 thangroove 3 more near needle point.But in this case, backflow blood will receive introducing pin 1 to a certain extent and become the restriction flat and inner chamber that reduces in expression lobes 4 before flowing out from groove 3.And in this case, in the assembling process of introducing pin 1 and introducing pin needle stand 6, still as in the prior art, the near-end that needs to introduce pin flattens and prevents that bonding agent from flowing into the inner chamber of introducing pin and blockinggroove 3.

Fig. 4 has schematically showed the conduit and the overall structure of introducingneedle assembly 10 among embodiment of the application.Wherein, conduit comprises with introducing needle assembly 10:catheter block 12;Conduit 2 is connected to an end ofcatheter block 12; Introduce pin 1, be contained in theconduit 2; Andextension 16, be connected to thelateral port 14 of catheter block 12.Wherein,extension 16 is to process with polyurethane material.In some embodiments,extension 16 is to process with the thermoplastic polyurethane material.In some embodiments,extension 16 is to process with Estane 58277 materials that Lubrizol company produces, and wherein, Estane 58277 materials are a kind of of thermoplastic polyurethane material.The material of extension does not contain ditridecyl phthalate (DEHP), thereby avoids oozing out in use DEHP.

Be with reference to specific embodiment the application to be described by way of example hereinbefore, yet, be not to be understood that those skilled in the art can change these embodiments in order to be the restriction to the application under the situation that does not break away from the application's protection domain.The application's protection domain is defined by the claims.

Claims (9)

1. A conduit with introduce needle assembly, it is characterized in that it comprises: catheter block; Conduit is connected to an end of said catheter block; Introduce pin, be contained in the said conduit; And extension, be connected to the lateral port of said catheter block, wherein, said lateral port is communicated with said catheter block fluid, and said extension is to process with polyurethane material, and said introducing pin is provided with groove and expression lobes.
2. 2. conduit as claimed in claim 1 with introduce needle assembly, it is characterized in that, said groove than said expression lobes more near the needle point of introducing pin.
3. 3. conduit as claimed in claim 1 and introducing needle assembly; It is characterized in that; Said expression lobes through with the perpendicular Y axis of the longitudinal axis of said introducing pin on the said introducing pin of extruding form; Thereby make the material of introducing pin with the perpendicular X axis of the longitudinal axis of said introducing pin and said Y axis on flow and form this expression lobes, the inner chamber of said introducing pin becomes flat through said extruding.
4. 4. conduit as claimed in claim 1 and introducing needle assembly is characterized in that the cross section of said expression lobes is a dumbbell shape.
5. 5. conduit as claimed in claim 4 with introduce needle assembly, it is characterized in that said dumb-bell shape convexity is through locating extruding 2 of said introducing pin or this introducing pin of folder forms, said 2 line intersects with the longitudinal axis of said introducing pin.
6. 6. conduit as claimed in claim 1 and introducing needle assembly is characterized in that the cross section of said expression lobes is an elliptical shape.
7. 7. conduit as claimed in claim 6 and introducing needle assembly is characterized in that said oval-shaped expression lobes is pushed said introducing pin by two plane surfaces and formed.
8. 8. conduit as claimed in claim 1 and introducing needle assembly is characterized in that said extension is to process with the thermoplastic polyurethane material.
9. 9. conduit as claimed in claim 8 and introducing needle assembly is characterized in that said thermoplastic polyurethane material is Estane 58277 materials that Lubrizol company produces.

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