CN200945293Y - Introduction needle for catheter and introduction needle assembly - Google Patents
Introduction needle for catheter and introduction needle assembly Download PDFInfo
- Publication number
- CN200945293Y CN200945293Y CN 200620121387 CN200620121387U CN200945293Y CN 200945293 Y CN200945293 Y CN 200945293Y CN 200620121387 CN200620121387 CN 200620121387 CN 200620121387 U CN200620121387 U CN 200620121387U CN 200945293 Y CN200945293 Y CN 200945293Y
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- pin
- introducing
- introducing pin
- conduit
- needle assembly
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Abstract
The utility model provides an introduction needle for catheter and introduction needle assembly, which is characterized in that: a groove and an extruding bulge are arranged on the leading-in needle. Compared with the traditional leading-in needle with raised hoop structure, the utility model has cheaper manufacture, and has optimized blood circumfluence.
Description
Technical field
This utility model relates to the introducing pin that is used for conduit and introduces needle assembly, and this introducing pin is provided with groove.
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 for extracting blood in the patient body.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 and introducing pin are assembled into, and the needle point of introducing pin extends beyond the needle point of conduit, and the inclined plane of introducing pin needle tip up.
Conduit and 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 continuous with one of central vessel branch that directly links to each other with heart.In a kind of therein technology, introduce pin and conduit and penetrated in the blood vessel fully together.And in another technology, introduce pin and after the venipuncture of beginning, partly extracted out from conduit.Then, conduit is fully inserted in the blood vessel.
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 to have in introducing pin backflow blood to exist.In order to confirm whether correctly location of described assembly, introduce pin and can on its distal portions, be provided with a groove or opening, like this, when conduit is made 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 confirmed that the medical worker will be by 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 is connected to conduit such as the unfractionated heparin medicated cap or with skull.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 may 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, acquired immune deficiency syndrome (AIDS) (AIDS), these diseases may be delivered to the another one people from an infected person by the exchange of body fluid.Therefore, contact and to avoid with the body fluid of AIDSinfected patient.As mentioned above, be used to a conduit is placed in the blood vessel of AIDSinfected patient if introduce pin, this introduces the media that pin is exactly the transmission disease so.Need correct handle " being 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 not being careful or neglecting, 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 and introducing needle assembly are provided with alligator clamp or pin cover, 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, and this iron hoop is than the close more needle point of described backflow groove.When the introducing pin was extracted out from conduit, this iron hoop will stop that needle point shifts out outside described 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 introduces one of document of needle assembly.
Yet the existing introducing pin that has backflow groove and iron hoop manufactures relatively expensive, because need independent step that described iron hoop is installed on the described 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 described backflow groove or needle point opening.The potential problem of another one is that described iron hoop can reduce conduit cavity inevitably and introduce 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.
This utility model relates to the improvement of the introducing pin that has the backflow groove just, and this introducing pin for example can be used in conduit and introduce needle assembly, especially safe vein conduit and introduce in the needle assembly.
Summary of the invention
This utility model provides a kind of introducing pin that is used for conduit and introduces needle assembly, and this introducing pin is provided with groove and expression lobes.
Preferably, described groove is than the close more needle point of introducing pin of described expression lobes.
Described expression lobes forms by the described introducing pin of extruding on the Y-axis line, forms this expression lobes thereby the material of introducing pin is flowed on the X-axis line, and the inner chamber of described introducing pin becomes flat by described extruding.
Among embodiment, the cross section of described expression lobes is a dumbbell shape therein.
Described dumb-bell shape projection forms by locating extruding 2 of described introducing pin or pressing from both sides this introducing pin, and described 2 line intersects with the axis of described introducing pin.
In another embodiment, the cross section of described expression lobes is an elliptical shape.
Described oval-shaped expression lobes is pushed described introducing pin by two plane surfaces and is formed.
Most preferred embodiment shown in reference to the accompanying drawings is described in detail explanation to this utility model hereinafter.
Accompanying drawing is described
Fig. 1 schematically shows this utility model and introduces the projection that the extruding of pin forms and the arrangement of blood backflow groove;
It is how to be extruded to form described projection that Fig. 2 a-2d schematically shows introducing pin of the present utility model;
Fig. 3 shows bonding agent and flow in introducing pin needle stand and the introducing pin.
Preferred forms
In this article, term " near-end " and " far-end " are used to describe the position of introducing on the 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 this utility model embodiment.Conduit and introducing needle assembly have been inserted in patient's the blood vessel 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 make.Introduce pin 1 and have groove 3 and the expression lobes 4 that is used to observe the blood backflow, in an embodiment, groove 3 is than the close more needle point of introducing pin of expression lobes.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, the medical worker confirms whether to have the backflow generation of blood in introducing pin.Showing blood by the arrow shown in the label 5 in Fig. 1 refluxes in introducing pin.Because conduit is transparent or is translucent at least, refluxes so can observe blood in the annular space of introducing between pin and the conduit cavity.In case the correct location of conduit is confirmed that the medical worker just depresses patient's skin by 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 by 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, in conduit and introducing needle assembly, batching pig (septum) is set.
Fig. 2 a-2d illustrates the expression lobes 4 of this utility model introducing pin and how to make.Fig. 2 a shows the top view of introducing pin 1, and the opening of groove 3 is positioned at the top of introducing pin 1.Fig. 2 b is for introducing the side view of pin 1.Fig. 2 c is the cutaway view that the expression lobes 4 of one of them embodiment of this utility model is cut open along the hatching line A-A among Fig. 2 b.Fig. 2 d is the cutaway view that the expression lobes 4 of this utility model another one embodiment is cut open along the hatching line A-A among Fig. 2 b.
For convenience of description, it is necessary setting up a coordinate system.With reference to Fig. 2 a, the X-axis line along from the bottom of page to the direction at top, and the Y-axis line is perpendicular to the direction of page.
Shown in Fig. 2 c-2d, introducing pin 1 of the present utility model is squeezed on the Y-axis line, and the material that is squeezed flows on X-axis line direction, thereby obtains the projection that extruding forms on X-axis line direction.Introduce the inner chamber 9 of pin 1 because this squeezing action becomes flat.
Fig. 2 d illustrates one of them embodiment of the present utility model, and in this embodiment, the projection 4 that extruding forms is by locating extruding or press from both sides introducing pin 1 to form at 2.The continuous axis that forms of described 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 dumbbell shape projection of formation through extruding, 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 another one embodiment of the present utility model, can push and form the expression lobes that shape of cross section is an elliptical shape introducing pin by two planes rather than above-mentioned 2.
Preferably, be used to observe the needle point of the groove 3 of blood backflow than expression lobes 4 more close introducing pins.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 the groove 3 of introducing pin its obstruction, and this will further describe with reference to accompanying drawing 3 hereinafter.
What deserves to be mentioned is that the annular space between the outer surface of the inner chamber of conduit 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 groove 3 that blood refluxes and expression lobes 4 that has of the present utility model is compared with introducing pin of the prior art and is had 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 described backflow groove more near the needle point of introducing pin.Otherwise, if the backflow groove than the close needle point of described iron hoop, 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, as described in Figure 3,, need they be bonded together along position dispensed adhesive shown in the arrow 7 introducing pin 1 and introducing in the assembling process of pin needle stand 6.Therefore, in order to prevent that bonding agent from flowing into the inner chamber of introducing pin and blocking backflow groove 3 from the direction shown in the arrow 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 this utility model embodiment, preferably, the position of groove 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, this introducing needle construction of the present utility model will be optimized blood and reflux, and make it flow to near-end from groove 3 swimmingly, flow through expression lobes 4 therebetween.
Last but be not least important, as shown in Figure 3, introducing pin 1 and introducing in the assembling process of 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 up groove 3, thereby also just stopped up the backflow of blood.Described as mentioned, and in the prior art, needed an extra step to solve bonding agent and flow into this problem of inner chamber of introducing pin 1.Yet in this utility model, 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, expression lobes 4 of the present utility model 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 through pushing in the prior art.Therefore, expression lobes 4 of the present utility model is more cheap with respect to iron hoop infrastructure cost of the prior art.
What deserves to be mentioned is that although the position of groove 3 and expression lobes 4 can be put upside down, that is, expression lobes 4 is than the close more needle point of groove 3.But in this case, backflow blood will be subjected to 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, introducing pin 1 and introducing in the assembling process of pin needle stand 6, still as in the prior art, the near-end of introducing pin need be flattened and prevents that bonding agent from flowing into the inner chamber of introducing pin and blocking groove 3.
Be with reference to specific embodiment this utility model to be described by way of example hereinbefore; yet; not should be understood to is to restriction of the present utility model, and those skilled in the art can change these embodiments under the situation that does not break away from this utility model protection domain.Protection domain of the present utility model is defined by the claims.
Claims (7)
1, a kind of introducing pin that is used for conduit and introduces needle assembly is characterized in that this introducing pin is provided with groove and expression lobes.
2, the introducing pin that is used for conduit and introduces needle assembly as claimed in claim 1 is characterized in that, described groove is than the close more needle point of introducing pin of described expression lobes.
3, the introducing pin that is used for conduit and introduces needle assembly as claimed in claim 1, it is characterized in that, described expression lobes forms by the described introducing pin of extruding on the Y-axis line, thereby the material of introducing pin is flowed on the X-axis line form this expression lobes, the inner chamber of described introducing pin becomes flat by described extruding.
4, the introducing pin that is used for conduit and introduces needle assembly as claimed in claim 1 is characterized in that the cross section of described expression lobes is a dumbbell shape.
5, the introducing pin that is used for conduit and introduces needle assembly as claimed in claim 4 is characterized in that, described dumb-bell shape projection is by locating extruding or press from both sides this introducing pin to form 2 of described introducing pin, and described 2 line intersects with the axis of described introducing pin.
6, the introducing pin that is used for conduit and introduces needle assembly as claimed in claim 1 is characterized in that the cross section of described expression lobes is an elliptical shape.
7, the introducing pin that is used for conduit and introduces needle assembly as claimed in claim 6 is characterized in that described oval-shaped expression lobes is pushed described introducing pin by two plane surfaces and formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620121387 CN200945293Y (en) | 2006-07-27 | 2006-07-27 | Introduction needle for catheter and introduction needle assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620121387 CN200945293Y (en) | 2006-07-27 | 2006-07-27 | Introduction needle for catheter and introduction needle assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200945293Y true CN200945293Y (en) | 2007-09-12 |
Family
ID=38732354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620121387 Expired - Lifetime CN200945293Y (en) | 2006-07-27 | 2006-07-27 | Introduction needle for catheter and introduction needle assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200945293Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862499A (en) * | 2010-06-23 | 2010-10-20 | 邹最 | Puncture structure assembly with medical blood returning observation function |
| CN101112632B (en) * | 2006-07-27 | 2011-08-17 | 贝克顿·迪金森公司 | Introducing needle for vessels and introducing needle components |
-
2006
- 2006-07-27 CN CN 200620121387 patent/CN200945293Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101112632B (en) * | 2006-07-27 | 2011-08-17 | 贝克顿·迪金森公司 | Introducing needle for vessels and introducing needle components |
| CN101862499A (en) * | 2010-06-23 | 2010-10-20 | 邹最 | Puncture structure assembly with medical blood returning observation function |
| CN101862499B (en) * | 2010-06-23 | 2013-08-14 | 邹最 | Puncture structure assembly with medical blood returning observation function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20070912 Effective date of abandoning: 20060727 |