CN101112639B - Vessel having a safeguard device and introducing needle component - Google Patents

Abstract

The present invention relates to a safety device (40), including: a needle cage (41), which limitedly forms a longitudinal extended channel, the extended channel thereof is provided with a longitudinal opening (60); at least one spring clamp (50), which is arranged in the longitudinal extended channel via the longitudinal opening (60); and a stopping device, which is used for blocking the enlarged part (38) of a leading needle (31), wherein, the longitudinal extended channel can allow the leading needle (31) to penetrate the needle cage (41) longitudinally and extendedly, at least one spring clamp (50) is provided with a first clamping part (55) to be used for meshing with a guide pipe base (24), the shape of at least one part of at least one spring clamp (50) is prepared to that the shape is compressed by the leading needle before the leading needle is drew out from a guide pipe component (20) and is released to bounce and to capture a sharp distal needle tip (32) of the leading needle after the leading needle is drew out from the guide pipe component (20).

Description

The conduit and introducing needle assembly that have safety device

Technical field

The present invention relates to a kind of conduit and introduce needle assembly, more particularly, relate to a kind of conduit and safety device of introducing needle assembly of being used for.

Background technology

Catheter in blood vessel, particularly venous duct (IV conduit) 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 introducing pin, and the needle point of introducing pin extends beyond the tip of conduit, 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 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 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.Whether correctly in order to confirm said assembly location, the medical worker need confirm whether have backflow blood to exist at introducing pin and the back cavity that is arranged in introducing pin proximal end.Usually this back cavity constitutes the part of catheter block.As other a kind of scheme, 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.Also can realize the obturation of blood flow through a batching pig.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, various introducing pin safety devices have been developed.

American documentation literature US6287278 discloses a kind of IV conduit tube component, and this IV conduit tube component is provided with an alligator clamp that is used for protecting user.Yet this IV conduit tube component is not provided with outer housing or surrounds the outer housing of said alligator clamp.Although said alligator clamp can prevent user and touch the needle point of introducing pin that it can not prevent that user from touching the remained blood that is positioned on the needle point, and is particularly, all the more so when the introducing pin is provided with some circumferential apertures such as the backflow groove.So the IV conduit tube component among the US6287278 still is unsafe for the user.

Disclose a kind of conduit among the american documentation literature US5215528 and introduced needle assembly, had a metal clip in this assembly, this metal clip prevents that user is introduced into pricking wound after conduit is inserted in the blood vessel and from conduit, extracts the introducing pin out.Shown in the accompanying drawing of US5215528, conduit has a plurality ofarc convex 50 that stretch out from flange 48 with the introducing needle assembly, and these arc convex limit and form a containingseat 53, in this containingseat 53, keep catheter block 52.One end ofbody 38 limits lobe 38a of formation and extends in the catheter block.The end ofarc convex 50 comprises some lips that extend internally 54, and these lips are keeping the flange 56 of catheter block releasedly.Arc convex 50 andlip 54 are designed to can joint flange 56 and make and removecatheter block 52 from containingseat 53 and compare, user by means of protuberance 48b more easily from introducing the pin needle stand pin cover of backing off.Yet above-mentioned matching relationship is also unreliable, because it depends on manufacturing tolerance.Like this, the disengaging between catheter block and introducing pin pin cover is unpredictable, possibly before needle point got up by safeguard protection, just break away from.It is inappropriate that this unsettled behavior needs in the environment of accuracy and reliability at some.

Therefore, in the prior art, still need improve so that overcome above-mentioned shortcoming with the safety device of introducing needle assembly being used for conduit.

Summary of the invention

An object of the present invention is to provide a kind of conduit and safety device of introducing needle assembly of being used for; It can prevent that not only user from touching the needle point of introducing pin but also can prevent that user from touching the sticky object on the needle point after conduit is inserted in the blood vessel and will introduces pin extraction conduit.

Another object of the present invention provides a kind of conduit and safety device of introducing needle assembly of being used for, and this safety device makes the disengaging between catheter block and the pin cover accurate more and reliable.

The object of the invention realizes with the safety device of introducing needle assembly that through a kind of conduit that is used for said conduit comprises with the introducing needle assembly:

Conduit tube component, this conduit tube component comprises: conduit has near-end and far-end; Catheter block is fixed to the near-end of conduit;

Introduce needle assembly, this introducing needle assembly comprises: introduce pin, it has the needle point of far-end, near-end, and the augmenting portion between needle point and near-end; Needle stand is fixed to the near-end of introducing pin;

Said safety device, it is slidingly connected at said conduit tube component and introduces between the needle assembly, and said safety device comprises: pin cover, this pin cover limit and form longitudinally extending channels, and this longitudinally extending channels is provided with the opening of lengthwise; At least one alligator clamp, its opening through lengthwise is installed in the said longitudinally extending channels; And stop device; Be used to stop the augmenting portion of introducing pin; Wherein said longitudinally extending channels can allow that introducing the pin longitudinal extension passes the pin cover; Said at least one alligator clamp is provided with first Access Division and is used for meshing with catheter block; The shape of at least a portion of said at least one alligator clamp was formed into before the introducing pin is extracted out from conduit tube component to be compressed by this introducing pin, and introduces pin after conduit tube component is extracted out at this, and this said at least a portion is released the sharp distal needle point of upspringing and catching said introducing pin.

The present invention also provides a kind of conduit and has introduced needle assembly, and said conduit comprises with the introducing needle assembly:

Conduit tube component, this conduit tube component comprises: conduit has near-end and far-end; Catheter block is fixed to the near-end of conduit;

Introduce needle assembly, this introducing needle assembly comprises: introduce pin, it has the needle point of far-end, near-end, and the augmenting portion between needle point and near-end; Needle stand is fixed to the near-end of introducing pin;

Safety device, it is slidingly connected at said conduit tube component and introduces between the needle assembly, and said safety device comprises: pin cover, this pin cover limit and form longitudinally extending channels, and this longitudinally extending channels is provided with the opening of lengthwise; At least one alligator clamp, its opening through lengthwise is installed in the said longitudinally extending channels; And stop device; Be used to stop the augmenting portion of introducing pin; Wherein said longitudinally extending channels can allow that introducing the pin longitudinal extension passes the pin cover; Said at least one alligator clamp is provided with first Access Division and is used for meshing with catheter block; The shape of at least a portion of said at least one alligator clamp was formed into before the introducing pin is extracted out from conduit tube component to be compressed by this introducing pin, and introduces pin after conduit tube component is extracted out at this, and this said at least a portion is released the sharp distal needle point of upspringing and catching said introducing pin.

The accompanying drawing Short Description

Hereinafter will present invention is described with reference to the preferred embodiment shown in the accompanying drawing.

Fig. 1 shows the conduit and introducing needle assembly that wherein has safety device of the present invention.

Fig. 2 is illustrated in to extract out and introduces after the pin, and the needle point of introducing pin is closed in the safety device of the present invention.

Fig. 3 a-d illustrates safety device of the present invention, and this safety device comprises alligator clamp, and this alligator clamp is installed to the pin cover from the top of safety device, and is stuck on the position through the U-shaped structure of alligator clamp, the channel alignment on the Kong Yuzhen cover on the alligator clamp.Wherein Fig. 3 a is the top view of safety device, and Fig. 3 b is the front view of safety device, and Fig. 3 c is the perspective view of safety device, and Fig. 3 d is the side view of safety device.

Fig. 4 a-4g shows the shape of first embodiment medi-spring folder, and wherein Fig. 4 a is a bottom view, and Fig. 4 b is a front view, and Fig. 4 c is the top view of alligator clamp, and Fig. 4 e and Fig. 4 g are two perspective views, and Fig. 4 f is the side view of alligator clamp.

Fig. 5 a-e shows the structure of pin cover of the present invention.Wherein Fig. 5 a is a perspective view of pin cover, and Fig. 5 b is a side view of pin cover, and Fig. 5 c is a bottom view of pin cover, and Fig. 5 d is a front view of pin cover, and Fig. 5 e is a top view of pin cover.

The zoomed-in view of Fig. 6 shows pin cover and the alligator clamp that is enclosed on the needle point of introducing needle distal.

Fig. 7 shows pin cover and alligator clamp.On the periphery of this pin cover main body, be provided with one or more a plurality of slide rails, thereby the pin cover slided easily owing to having reduced contact point.

Fig. 8 is a cutaway view, shows safety device of the present invention and is enclosed in introducing pin needle stand and the catheter block.

Fig. 9 shows an amplification view introducing pin and conduit tube component, and wherein, the pin cover is enclosed in to be introduced in pin needle stand and the catheter block, and the V bending of alligator clamp is engaged in the groove on the catheter block.

Figure 10 shows a stage when extracting the introducing pin out; In this stage; The groove of introducing on the pin is surrounded by the head of batching pig, and the distal end wall of alligator clamp still is introduced into the pin effect and be in compressive state, and the inverted V-shaped bending is engaged in the groove on the catheter block.

Figure 11 shows a stage when extracting the introducing pin out; In this stage; The needle point of introducing pin has moved through the distal end wall of alligator clamp; This distal end wall is introduced into the needle point that pin release is upspring and caught the introducing pin, prevent that this needle point from moving towards distal direction, and the inverted V-shaped bending is engaged on still in the recess of catheter block.

Figure 12 shows the stage of extracting out when introducing pin; Wherein the crooked recess with catheter block of the V of alligator clamp breaks away from engagement; The pin cover separates with catheter block; Stoped the introducing pin to move towards proximal direction and be positioned at the convexity of introducing on the pin, the lobe that on the near-end of pin cover, extends out has prevented that blood from exposing in the groove of introducing pin.

Figure 13 shows a kind of structure of introducing pin, and its further groove is positioned at after the expression lobes.

Figure 14 shows a kind of structure of introducing pin, and its further groove is positioned at after the three-dimensional convexity.

Figure 15 a-e shows the safety device of second embodiment of the invention.Wherein Figure 15 a is the top view of this safety device, and Figure 15 b is the front view of this safety device, and Figure 15 c is the bottom view of this safety device, and Figure 15 d is the perspective view of this safety device, and Figure 15 e is the side view of this safety device.

Figure 16 a-h shows the alligator clamp that is used in the second embodiment safety device.Figure 16 a is the left side view of second alligator clamp; Figure 16 b is the front view of second alligator clamp, and Figure 16 c is the perspective view of second alligator clamp, and Figure 16 d is the right side view of second alligator clamp; Figure 16 e is the perspective view of first alligator clamp; Figure 16 f is the left side view of first alligator clamp, and Figure 16 g is the front view of first alligator clamp, and Figure 16 h is the right side view of first alligator clamp.

The specific embodiment

In this article, term " closely " and " far " are for introducingpin needle stand 34, to describe to be positioned at conduit and the position of introducing on the needle assembly.

Like Fig. 1, shown in 2,8 and 9, the conduit that has safety device of the present invention is identified bylabel 10 with the introducing needle assembly generally.It comprisesconduit tube component 20, introducesneedle assembly 30 andsafety device 40.

Conduit tube component 20 comprises theconduit 21 with near-end and far-end, and is fixed to thecatheter block 24 onconduit 21 near-ends.The suitable material that is used forconduit 21 comprises, but is not limited to, and thermoplastic resin is such as polytetrafluoroethylene (PTFE), polyurethane or the like.More preferably,conduit 21 by transparent material or at least trnaslucent materials process so that observe from the backflow groove (if having) of introducingpin 31 and to reflux.The suitable material that is used forcatheter block 24 includes, but not limited to the thermoplastic polymer resin such as Merlon, polystyrene, and polypropylene, or the like.

Introduceneedle assembly 30 and comprise introducingpin 31, this introducingpin 31 has sharp-pointed terminal needle point, and this needle point is limited on an inclined-plane and forms, and near-end links to each other with introducing pin needle stand 34.Introducingpin 31 is preferably formed by rustless steel.Preferably, on introducingpin 31, abackflow groove 33 can be set.As a kind of alternative, can in introducingneedle assembly 30, a back cavity be set and replace described backflow groove 33.Introducepin needle stand 34 and can comprise that an Extendible flake that extends radially outwardly 36 supplies to grip use.The material of introducingpin needle stand 34 can be identical withcatheter block 24, also can be different.

Shown in Fig. 3 a-3d,safety device 40 comprisespin cover 41, and thispin cover 41 preferably is made of plastics.As shown in Figure 2, in case being inserted in the blood vessel and introducingpin 31,conduit 21 is drawn out ofconduit 21,safety device 40 will be held on the needle point of introducing pin, thus the protection user is not by prickingwound.Pin cover 41 limits and forms longitudinally extending channels, and this extension passage hasproximal part 43,distal portions 44 and middle slot portion 45.Longitudinally extending channels can allow that introducingpin 31 longitudinal extensions passes pin cover 41.The diameter ofproximal part 43,distal portions 44 andmiddle slot portion 45 is a bit larger tham the diameter of the bar portion that introducespin 31 at least.Proximal part 43,distal portions 44 andmiddle slot portion 45 are easily passed by the bar portion that can allow introducingpin 31 like this.Shown in Fig. 3 a and 3b, on lengthwise opening 60 is opened at least the saidmiddle slot portion 45 of part along the longitudinal direction ofpin cover 41.

Safety device 40 also comprisesalligator clamp 50, and it is preferably processed by spring leaf.Thisalligator clamp 50 is installed in the saidmiddle slot portion 45 through opening 60.Shown in Fig. 4 a-4g,alligator clamp 50 comprises:proximal end wall 51,midfeather 54 anddistal end wall 53 are shaped asporose 52 inproximal end wall 51 upper limits.Illustrate well at Fig. 4 b (front view of alligator clamp 50),proximal end wall 51 links to each other with an end ofmidfeather 54, andproximal end wall 51 is substantially perpendicular to midfeather 54.Distal end wall 53 links to each other with an other end ofmidfeather 54, and betweendistal end wall 53 andmidfeather 54, is provided with crookedly 55, and thisbending 55 is opposite withproximal end wall 51 anddistal end wall 53 one side-prominent towards midfeather 54.Preferably, crooked 55 can be the inverted V-shaped bending.Thisbending 55 is used as an Access Division and links to each other with catheter block 24.The shape ofdistal end wall 53 is formed into it and before the alligator clamp triggering, compresses by introducingpin 31, upsprings and after alligator clamp triggers, be introduced intopin 31 releases.This will be described in more detail below.

Preferably,distal end wall 53 has a part at its free end, and the width of this part is preferably narrow than other partial width of distal end wall.The part that this width reduces can be introduced intopin 31 compressions and bending before spring triggers.

Preferably,proximal end wall 51 is provided withsecond Access Division 57 on its free end.For example, thissecond Access Division 57 can be bent to form the U-shaped Access Division through the free end with proximal end wall 51.This U-shaped Access Division will be fastened togather with the appropriate section that is formed on the pin cover inwall.Said appropriate section can be for being arranged on thetooth portion 47 in themiddle slot portion 45.

Preferably,hole 52 has the reinforcement lip on its periphery, is used to block the diameter-increasing portion (for example convexity) that is positioned on the introducing pin shank.As a kind of alternative, but the diameter-increasing portion of introducing the pin shank can be thanhole 52 little diameters greater than theproximal part 43 that extends passage, and like this, when extracting the introducing pin out, thisproximal part 43 will block the diameter-increasing portion of introducing the pin shank.

Like Fig. 3 a-3d,alligator clamp 50 is engaged in thepin cover 41 through opening 60, and is stuck on the position bysecond Access Division 57 ofalligator clamp 50, and thehole 52 that is positioned on theproximal end wall 51 is aimed at the opening onpin cover 41 proximal parts.Illustrate best like Fig. 3 b, the inverted V-shaped of alligator clamp crooked 55 protrudes in outside the outer wall of pin cover 41.When introducing pin (after just spring triggers) after conduit is extracted out,distal end wall 53 will be in the extension passage of pin covermain body 41 between the opening of opening anddistal portions 44 ofproximal part 43.

Fig. 5 a-5e shows the structure ofpin cover 41 in the first embodiment of theinvention.Pin cover 41 is by plastics or other material is molded forms, and has a through hole along the axis that passes through of introducing pin 31.A dentation preferably is set by AccessDivision 47 inpin cover 41, this dentation is used for engaging with the said U-shaped AccessDivision 57 ofalligator clamp 50 by Access Division 47, prevents thatalligator clamp 50 breaks away from frompin cover 41.

Fig. 6 is illustrated in and introduces afterpin 31 extracts from conduit, andpin cover 41 andalligator clamp 50 are enclosed in the needle point place of introducing needle distal.The close end of introducingpin 31 is fixed to introduces pin needle stand 30.And in situation shown in Figure 1, introducepin needle stand 34 andsurround safety device 40, thereby cannot see from the outside.

As shown in Figure 7, one ormore slide rail 49 can be set on the outer surface of pin cover 41.Because saidslide rail 49 has reduced the contact area betweenpin cover 41 and the needle stand 34, skids off in theneedle stand 34 so helppin cover 41.

Fig. 8 is a cutaway view, and it shows conduit and the state of introducingneedle assembly 10 before introducingpin 31 is extracted out fromconduit 21, and whereinsafety device 40 is enclosed in and introduces inpin needle stand 34 and the catheter block 24.The proximal part ofsafety device 40 is introduced into 34 encirclements of pin needle stand, and the distal portions ofsafety device 40 is surrounded by catheter block 24.Oncatheter block 24, be provided with a recess 25.Inverted V-shaped Access Division 55 on thealligator clamp 50 and theserecess 25 engagements.Fig. 9 illustrates shown in Fig. 8 under the state, and conduit and the amplification view of introducingneedle assembly 10 are wherein introducedpin 31 and extracted out a bit a little.

Although the description of this invention is to carry out with reference to aconduit tube component 20 that has batching pig 29 (septum),safety device 40 of the present invention also can use with the conduit tube component of other type, for example, does not have describedbatching pig 29.

During normal use, incase conduit 21 correctly is inserted in the blood vessel, will extractconduit 21 out introducingpin 31, said introducingpin 31 is provided preferably with blood backflow groove 33 (referring to Figure 13 and 14).Several stages when Figure 10-12 shows and introducespin 31 and fromconduit tube component 20, extract out.

In stage shown in Figure 10, thebackflow groove 33 of introducingpin 31 is moved in the head ofbatching pig 29 and by thisbatching pig 29 and surrounds, and at this moment, thedistal end wall 53 ofalligator clamp 50 still is introduced intopin 31 compressions.

In stage shown in Figure 11, the distal end wall ofalligator clamp 50 53 no longer hinders it owing to introducepin 31, thus bounce from compressive state, thus the needle point thatdistal end wall 53 will be introducedpin 31 is caught and is prevented that it is towards the past swivel motion of distal direction.

Figure 12 shows the another one stage, and wherein, the needle point of introducingpin 31 is caught by thedistal end wall 53 ofalligator clamp 50 and can not back be slided towards distal direction, and the augmentingportion 38 of introducingpin 31 has prevented that introducingpin 31 from sliding towards proximal direction.The extension protruding 46 that is positioned on thepin cover 41 prevents that blood from spilling from the needle point or the groove 33 (if having) that refluxes.Introducepin 31 along with further taking out towards proximal direction, inverted V-shaped Access Division 55 will break away from engagement with therecess 25 of catheter block 24.Therefore,pin cover 41 is discharged bycatheter block 24.

In the above-described embodiments, be positioned at the augmenting portion of introducing on thepin 31 38 and can be a convexity.As shown in Figure 13, thisconvexity 38 can be expression lobes, preferably, is provided withbackflow groove 33 after this expression lobes.Preferably, this expression lobes can form through 2 that extruding is perhaps pinched on the introducing pin 31.Line between described 2 must intersect with the longitudinal axis of introducingpin 31.

Shown in figure 14, the augmentingportion 38 on the introducingpin 31 can also adopt the structure of other form.For example, this augmentingportion 38 can be thepart 38 of a diameter increase, and thepart 38 that this diameter increases can adopt disclosed convex form in the U.S. Pat 5215528, and the document here is introduced into as a reference.Thepart 38 that said diameter increases has a mid portion; The external diameter of this mid portion is greater than the external diameter of introducingpin 31 bar portions; Be extended with a gradually thin proximal part from said mid portion towards the proximal part of introducingpin 31, be extended with a gradually thin distal portions from said mid portion towards the distal portions of introducing pin 31.Although thediameter parts 38 that increases is made as symmetrical structure, this is not necessary.

The diameter of thediameter parts 38 that increases should be greater than the bar portion external diameter of introducingpin 31, but should be less than the internal diameter of thedistal portions 44 of longitudinally extending channels.So just guaranteed that introducingpin 31 can be pulled in thesafety device 40 along proximal direction.In order to prevent that introducingpin 31 is pulled out to outside thesafety device 40 along proximal direction up hill and dale, theproximal part 43 of longitudinally extending channels should be littler thanmajor diameter part 38, thereby stop that introducingpin 31 moves throughproximal part 43.

As a kind of alternative, also be preferred version, the diameter in thehole 52 of theproximal end wall 51 ofalligator clamp 50 is a bit larger tham the diameter of the bar portion that introducespin 31, but less than the diameter of thediameter parts 38 that increases.Like this, when introducepin 31 with respect to respect tosafety device 40 when proximal direction is extracted out, thediameter parts 38 of increase will be stuck in 52 places, hole ofproximal end wall 51, rather than is stuck inproximal part 43 places of pin cover 41.This has prevented that introducingpin 31 thoroughly is retracted to outside thepin cover 41 along proximal direction.

Inorder conduit 21 to be put in patient's the blood vessel, the medical worker will introducepin 31 and longitudinally aim at target blood substantially with conduit 21.The inclined-plane of introducing pin needle point should deviate from the patient in piercing process skin surface.The medical worker will introducepin 31 and preferably penetrate in the patient skin less than 35 degree with a shallow angle withconduit 21, thereby theneedle point 32 of introducing pin enters into target blood.The medical worker preferably observes the backflow blood that the blood that is arranged in the back cavity of introducing pin needle stand 34 refluxes or is arranged in thebackflow groove 33 of introducingpin 31 then.

After having confirmed that introducing pin 31 is in the location in the target blood with conduit 21, the medical worker with conduit 21 in blood vessel axially along introducing pin 31 towards distal advancement.In some technology, introducing pin 31 can advance to partly in conduit 21, to return before the appropriate position in the blood vessel and remove at conduit 21 fully.After realizing the correct location of conduit 21, the medical worker is pressed in the finger of another hands on the patient skin at far-end blood vessel of living in place of conduit 21.Through being pressed in its finger on the patient skin and applying enough pressure; The medical worker will block the blood flow through conduit 21 effectively; If if perhaps be provided with batching pig 29 in the conduit tube component 20, flowing of blood also can be stopped by this batching pig 29.The medical worker will introduce pin 31 and thoroughly extract out in the conduits 21 through move introducing pin needle stand 34 towards near-end then.This motion makes the needle point 32 of introducing pin 31 enter into safety device 40 towards proximal direction.Yet at least during the proximal motion of introducing pin 31 beginnings, the inverted V-shaped of alligator clamp 50 crooked 55 engages with recess on the catheter block as an Access Division, makes pin cover 41 still engage with catheter block 24.In case needle point 32 is arranged in safety device 40 and introduces pin 31 when being locked in wherein by alligator clamp 50, the proximal direction active force that continues that acts on the needle stand 34 will make the crooked recess with catheter block 24 of inverted V-shaped break away from engagement.After introducing pin 31 shifted out from catheter block 24 with safety device 40, the medical worker can or be connected to conduit tube component 20 with skull with liquid transporting apparatus, unfractionated heparin medicated cap (PRN), and the treatment that begins to map out.Then, introducing pin 31 can handle according to simple processing rules with pin cover 41.

Figure 15 a-e shows the safety device 40 of second embodiment of the invention, and Figure 16 a-h shows the alligator clamp 50 that in the safety device 40 of second embodiment, uses.Itself and the first embodiment difference are here only described.First embodiment and the second embodiment difference are that the alligator clamp 50 among first embodiment is divided into two parts in a second embodiment, that is, and and the first alligator clamp 50a and the second alligator clamp 50b.The first alligator clamp 50a comprises midfeather 54 and distal end wall 53, and the bending between them 55.The second alligator clamp 50b comprises proximal end wall 51, and it limit to form porose 52, and proximal end wall 51 is formed with U-shaped Access Division 57 through bending its free end.In a second embodiment; The first alligator clamp 50a bonds to through the free end with midfeather 54 on the appropriate section of pin cover 41 and is installed in the pin cover 41, and the second alligator clamp 50b is installed in the pin cover 41 by Access Division 47 buckles through the dentation that is provided with in U-shaped Access Division 57 and the pin cover 41.As a kind of alternative, in this second embodiment, the second alligator clamp 50b also can be with foraminous packing ring to replace by one, and the diameter in the hole of packing ring should be greater than the diameter of the bar portion that introduces pin 31, and less than the augmenting portion 38 of introducing pin 31.

Should be pointed out that among the present invention that the form that is different from first and second embodiment can be adopted infirst Access Division 55 of alligator clamp 50.For example, a spherical pore can be set on the alligator clamp replace said inverted V-shaped crooked, and said spherical pore can mesh with the ball bearing that is arranged in thecatheter block 24.

Alligator clamp 50 of the present invention has two functions.One of them function is that the protection user can not touch the needle point of introducing pin.And the another one function provides a for example said inverted V-shaped bending in Access Division or spherical pore is meshed with catheter block 24.If these two separated words of function need two different alligator clamps to realize this function, thereby cost is increased.

Although describe the present invention with reference to specific embodiment hereinbefore; But be understood that; These specific embodiments are not appreciated that it is limitation of the present invention; Those skilled in the art can carry out some variations to specific embodiment without departing from the present invention, and scope of the present invention is limited by the accompanying claims.

Claims (20)

1. one kind is used for conduit and the safety device of introducing needle assembly (10), and said conduit comprising with introducing needle assembly (10):

Conduit tube component (20), this conduit tube component comprises: conduit (21) has near-end and far-end; Catheter block (24) is fixed to the near-end of conduit (21);

Introduce needle assembly (30), this introducing needle assembly comprises: introduce pin (31), it has needle point (32), near-end and the augmenting portion between needle point and near-end (38) of far-end; Needle stand (34) is fixed to the near-end of introducing pin (31);

Said safety device (40), it is slidingly connected at said conduit tube component (20) and introduces between the needle assembly (30), and said safety device (40) comprising: pin cover (41), this pin cover limit and form longitudinally extending channels, and this longitudinally extending channels is provided with the opening (60) of lengthwise; At least one alligator clamp (50), its opening through lengthwise (60) is installed in the said longitudinally extending channels; And stop device; Be used to stop the augmenting portion (38) of introducing pin (31); Wherein said longitudinally extending channels can allow that introducing pin (31) longitudinal extension passes pin cover (41); Said at least one alligator clamp (50) is provided with first Access Division (55), is used for and catheter block (24) engagement, and the shape of at least a portion of said at least one alligator clamp (50) was formed into before the introducing pin is extracted out from conduit tube component (20) by this introducing pin compression; And introduce pin after conduit tube component (20) is extracted out at this, this said at least a portion is released the sharp distal needle point (32) of upspringing and catching said introducing pin.

2. conduit and the safety device (40) of introducing needle assembly (10) of being used for as claimed in claim 1; Wherein said at least one alligator clamp (50) comprising: proximal end wall (51), midfeather (54) and distal end wall (53); Proximal end wall (51) links to each other with an end of midfeather (54); And distal end wall (53) links to each other with an other end of midfeather (54); And said first Access Division is to be positioned at the bending (55) between said midfeather (54) and the said distal end wall (53), this bending (55) and catheter block (24) engagement, and said distal end wall (53) is as said at least a portion of said alligator clamp (50).

3. conduit and the safety device (40) of introducing needle assembly (10) of being used for as claimed in claim 2; Wherein, Said distal end wall (53) has a part at its free end; The width of this part is littler than other partial width of distal end wall, and the part that this width reduces is just served as said at least a portion of said at least one alligator clamp (50).

4. conduit and the safety device (40) of introducing needle assembly (10) of being used for as claimed in claim 2 wherein, forms a U-shaped structure at the free end of said proximal end wall (51), this U-shaped structure be used for be positioned at pin cover (41) on tooth portion (47) engage.

5. like described conduit and the safety device (40) of introducing needle assembly (10) of being used for of one of claim 2-4; Wherein said proximal end wall (51) has a hole (52); The bar portion that introduces pin (31) can pass from this hole, and the internal diameter of this hole (52) is less than the said augmenting portion (38) of introducing pin.

6. conduit and the safety device (40) of introducing needle assembly (10) of being used for as claimed in claim 5, wherein, said hole (52) have the enhancing lip on its periphery, and this enhancing lip is used to block the augmenting portion of introducing on the pin (38).

7. conduit and the safety device (40) of introducing needle assembly (10) of being used for as claimed in claim 1, wherein, said augmenting portion (38) is for being positioned at one of expression lobes, roll extrusion convexity or iron hoop of introducing on the pin (31).

8. conduit and the safety device (40) of introducing needle assembly (10) of being used for as claimed in claim 2, one of them recess is arranged on the catheter block (24), said bending and the engagement of said recess.

9. conduit and the safety device (40) of introducing needle assembly (10) of being used for as claimed in claim 1, wherein said first Access Division is a spherical pore that is positioned at the alligator clamp top, said spherical pore and the ball bearing engagement that is arranged in the catheter block.

10. conduit and the safety device (40) of introducing needle assembly (10) of being used for as claimed in claim 1 wherein, is provided with one or more a plurality of guide rails (49) on the periphery of pin cover.

11. a conduit with introduce needle assembly (10), comprising:

Conduit tube component (20), this conduit tube component comprises: conduit (21) has near-end and far-end; Catheter block (24) is fixed to the near-end of conduit (21);

Introduce needle assembly (30), this introducing needle assembly comprises: introduce pin (31), it has needle point (32), near-end and the augmenting portion between needle point and near-end (38) of far-end; Needle stand (34) is fixed to the near-end of introducing pin (31);

Safety device (40), it is slidingly connected at said conduit tube component (20) and introduces between the needle assembly (30), and said safety device (40) comprising: pin cover (41), this pin cover limit and form longitudinally extending channels, and this longitudinally extending channels is provided with the opening (60) of lengthwise; At least one alligator clamp (50), its opening through lengthwise (60) is installed in the said longitudinally extending channels; And stop device; Be used to stop the augmenting portion (38) of introducing pin (31); Wherein said longitudinally extending channels can allow that introducing pin (31) longitudinal extension passes pin cover (41); Said at least one alligator clamp (50) is provided with first Access Division (55), is used for and catheter block (24) engagement, and the shape of at least a portion of said at least one alligator clamp (50) was formed into before the introducing pin is extracted out from conduit tube component (20) by this introducing pin compression; And introduce pin after conduit tube component (20) is extracted out at this, this said at least a portion is released the sharp distal needle point (32) of upspringing and catching said introducing pin.

12. conduit as claimed in claim 11 and introducing needle assembly (10); Wherein said at least one alligator clamp (50) comprising: proximal end wall (51), midfeather (54) and distal end wall (53); Proximal end wall (51) links to each other with an end of midfeather (54); And distal end wall (53) links to each other with an other end of midfeather (54); And said first Access Division is to be positioned at the bending (55) between said midfeather (54) and the said distal end wall (53), this bending (55) and catheter block (24) engagement, and said distal end wall (53) is as said at least a portion of said alligator clamp (50).

13. conduit as claimed in claim 12 and introducing needle assembly (10); Wherein, Said distal end wall (53) has a part at its free end; The width of this part is littler than other partial width of distal end wall, and the part that this width reduces is just served as said at least a portion of said at least one alligator clamp (50).

14. conduit as claimed in claim 12 with introduce needle assembly (10), wherein, form a U-shaped structure at the free end of said proximal end wall (51), this U-shaped structure be used for be positioned at pin cover (41) on tooth portion (47) engage.

15. like described conduit of one of claim 12-14 and introducing needle assembly (10), wherein said proximal end wall (51) has a hole (52), the bar portion that introduces pin (31) can pass from this hole, and the internal diameter of this hole (52) is less than the said augmenting portion (38) of introducing pin.

16. conduit as claimed in claim 15 and introducing needle assembly (10), wherein, said hole (52) have the enhancing lip on its periphery, and this enhancing lip is used to block the augmenting portion of introducing on the pin (38).

17. conduit as claimed in claim 11 and introducing needle assembly (10), wherein, said augmenting portion (38) is for being positioned at one of expression lobes, roll extrusion convexity or iron hoop of introducing on the pin (31).

18. conduit as claimed in claim 12 and introducing needle assembly (10), one of them recess is arranged on the catheter block (24), said bending and the engagement of said recess.

19. conduit as claimed in claim 11 and introducing needle assembly (10), wherein said first Access Division is a spherical pore that is positioned at the alligator clamp top, said spherical pore and the ball bearing engagement that is arranged in the catheter block.

20. conduit as claimed in claim 11 and introducing needle assembly (10) wherein, are provided with one or more a plurality of guide rails (49) on the periphery of pin cover.

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