CN1586648A

CN1586648A - Disposable safety blood taking and transfusion needle

Info

Publication number: CN1586648A
Application number: CN 200410053776
Authority: CN
Inventors: 钱倚天; 鲁祎民
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-08-16
Filing date: 2004-08-16
Publication date: 2005-03-02

Abstract

The disposable safety blood sampling and transfusion needle as one kind of medical equipment consists of needle tube, needle seat, protecting sleeve and liquid canal. The present invention features that the stopping stage in the needle seat has cross section shape similar to that of inner protecting sleeve cavity for mutual embedding, and the inner lobe fixed on to the inner wall of protecting sleeve or the inserted stopping pin can embed and fix the needle seat inside the protecting sleeve, so that the needle seat can move together with the protecting sleeve; and that when the needle is withdrawn, the protecting sleeve is fixed and the liquid guide pipe is drawn backwards to make the needle seat together with the needle tube enters into the protecting sleeve for being coated inside the protecting sleeve.

Description

Disposable type blood sampling safe in utilization, transfusion needle

Technical field:

The present invention relates in the medical apparatus and instruments venous blood collection, transfusion needle, especially refer to a kind of have safety guard, only can disposable venous blood collection, transfusion needle.

Background technology:

Along with the understanding of the mankind to infectious agent; numerous medical workers stab contaminated medical needle and the mortality that causes, hematogenic infection have caused the attention of height, and actively proposal is used and had safety guard and only can disposable medical needle device.Venous blood collection, transfusion needle are two kinds of functions of same structure because of it, and needing directly to insert blood vessel contacts with blood, so than the target that early is defined as researching and developing by the medical apparatus and instruments developer of various countries, wherein is no lack of international medical apparatus and instruments group, as TERUMO, it is to the parcel of the back needle tubing safety product (in China similar patent is arranged also, the patent No. is 03231779.4) as its this type of patent with the sheath of cover " rotate "; BD company then with " sheath on the needle handle " preceding push away parcel, locking with back needle tubing as the product that appears on the market of its safety; Except the safety product of this two large group, in the world the patent of more these series products design mainly concentrate on additional one can before the sheath that pushes away, make the side channel of its both sides can be chimeric with the structure on the needle handle, thereby reach parcel, the effect of locking, as Chinese patent: 02112106.0,00256772.5 etc. with the back needle tubing; The advantage of above-mentioned these products is: project organization is simple, production cost is low, it only added an active safety guard (promptly with after must open on one's own initiative or before push away safety guard, just can reach the purpose of security protection), but its sheath is when emergency operation, push away before might passing into silence, before push away locking sheath also might be opened mala fide, make main body pin portion be repeated to use, the safety product standard of the passive type self-destruction type that it and U.S.'s occupational safety and health control office (OSHA) are recommended (promptly uses the back needle tubing can be immediately, automatically be wrapped, Gu the lock and can't open, as opening mala fide, then main pin device is existing significantly damage so that can not reuse) the certain distance of tool still; On the other hand, the design of this class be suspended on the tube for transfusion before push away sheath or increase, increase thick connection locked joints and may make troubles to clinical manipulation.Certainly, some advanced technology also can help product to reach this recommended product safety standard of passive type self-destruction type, as ICU Medical, pass the passivity bar in the needle tubing of Inc., make the new technique patented product of " syringe needle rust " in blood vessel; " protection of needle tip passive type " safety patented product of B.BRAUN company etc.; but these advanced technical products have also correspondingly improved production cost; and do not meet the actual demand of disposable use medical products and practical requirement; so be necessary to develop a kind of passive self-destructing safety standard that both met, meet clinical product again to the instructions for use of Dispoable medical product.

Summary of the invention:

The objective of the invention is to require with the clinical practice operation is starting point, a kind of passive type self-destruction type security products standard that promptly meets is provided, meet low-cost safety blood sampling, the transfusion needle that requires of Dispoable medical product again, when not changing the clinical manipulation custom, make and use more conveniently, more effectively stop to hinder other people again and the haematogenous infection that causes with the back needle point.

For reaching above-mentioned purpose, disposable type blood sampling safe in utilization of the present invention, transfusion needle is by needle tubing, needle stand, sheath and catheter are formed, be characterized in: there is needle lumen in needle stand central authorities, fixedly the needle tubing of insertion is positioned at the front end of needle stand, there is the stop platform front portion of needle stand, the shape of its cross section is similar to the shape of sheath lumen cross section, make the two can be chimeric mutually, for the surface that can further increase the stop platform and the frictional force between jacket inner wall, prevent whole needle stand in sheath rotation and move forward and backward easily, maybe can there be evagination on the surface of stop platform, there is the shell fragment seat at the middle part of needle stand, the several piece shell fragment that fixedly connected jag formula is arranged on the shell fragment seat, shell fragment are connected root with the shell fragment seat inboard and needle lumen only are separated by with thin-walled, and the connecting portion of catheter is then arranged at the rear portion of needle stand; Sheath, its length is greater than the needle tubing length of front end, the front end of sheath is open, the shape of inner chamber cross section is similar to the shape of the cross section of stop platform, on the inwall fixed convex can be arranged, or in another money design of principle of uniformity, by the jack on the sheath, replace fixed convex on the inwall with the latch that inserts, they are placed between the stop platform and shell fragment that is fitted on the interior needle stand of sheath, the needle tubing that drives needle stand and front end thereof moves with sheath, and the rear port of sheath is a retraction ring, the maximum outside diameter after its diameter resets less than the external diameter of stop platform outer most edge on the needle stand and shell fragment, can there be or has the wing handle of being convenient to grip on the outer wall of sheath, wing handle can be and singlely also can be several, can directly be connected on the latch, also can be positioned at sheath foremost or other position; Catheter then firmly links to each other with the catheter connecting portion at needle stand rear portion.

According to above-mentioned project organization, when gripping sheath, just can drive the operation that the needle tubing that is entrenched in interior needle stand and front end thereof carries out the inserting needle puncture, when the withdraw of the needle, operator no longer need be removed the gluing band of locking pin device on skin, only need in blood sampling, the work original position of transfusion needle continues to fix its sheath, extract the latch on it, or at another money of principle of uniformity, contact with needle stand with fixed convex on the jacket inner wall that frictional force makes in their relatively-stationary designs between wall, directly pull back and open catheter, related needle stand, needle tubing retreats together, when needle point withdraws from human body, also enters in the sheath immediately; After the shell fragment on the needle stand passed through the retraction ring of sheath rear port, retraction ring just was fixed between the stop platform and shell fragment of needle stand, made sheath be locked in the front end of needle stand admittedly behind the whole needle tubing of parcel; As desire pusher sheath by force, then the inboard thin-walled of being separated by with needle lumen of shell fragment root will break, and exposes the needle tubing in the needle lumen, forms significantly and damages, thereby play only for disposable effect.

The structure of the present invention's design is deposited except immediately, automatically needle tubing being protected, admittedly be locked in inside and outside the sheath, solved more highlightedly for a long time when clinical manipulation is removed pin, must remove earlier that gluing band etc. is loaded down with trivial details, the step of mistaking and the blood back that causes, hemorrhage and even bubble go into accidents such as blood, make more succinct, the safety of operation, efficient and safety when improving clinical treatment have significant values, simultaneously, it also with before the overwhelming majority pushes away sheathed type safety product and has identical low cost, so it has following advantage:

1. safety venous blood collection, transfusion needle that meets passive type self-destruction type medical products standard.

2. when having improved processing safety, also solve the problem that exists when traditional product is removed pin, and clinical manipulation has not been had any interference and influence.

3. project organization is simple, and production cost is low.

Description of drawings:

Fig. 1 is a perspective view of the present invention

Fig. 2 is that needle stand of the present invention connects needle tubing and catheter perspective view

Fig. 3 is a needle stand perspective view of the present invention

Fig. 4 is the fixedly perspective view of convex sheath that has of the present invention

Fig. 5 is the perspective view that has the latch sheath of the present invention

Fig. 6 is the perspective view with the latch sheath of the present invention

Fig. 7 is a latch perspective view of the present invention

Fig. 8 is the perspective view behind the solid purl pipe of the present invention

The specific embodiment:

At first see also shown in Figure 1, disposable type blood sampling safe in utilization of the present invention, transfusion needle is by needle tubing 1, needle stand 2, sheath 3 and catheter 4 are formed, be characterized in: consult Fig. 2, shown in 3, there is needle lumen 21 in needle stand 2 central authorities, fixedly the needle tubing 1 of insertion is positioned at the front end of needle stand 2, there is stop platform 22 front portion of needle stand 2, the shape of its cross section is similar to the shape 31 of sheath 3 inner chamber cross sections, make the two can be chimeric mutually (please in conjunction with Fig. 4,5,6), for the surface that can further increase stop platform 22 and the frictional force between sheath 3 inwalls, prevent whole needle stand 2 in sheath 3 rotation and move forward and backward easily, maybe can there be evagination 23 on the surface of stop platform 22, there is shell fragment seat 24 at the middle part of needle stand 2, the several piece shell fragment 25 that fixedly connected jag formula is arranged on it, shell fragment 25 are connected root with shell fragment seat 24 inboard and needle lumen 21 only are separated by with thin-walled 26, and the connecting portion 27 of catheter is then arranged at the rear portion of needle stand 2; Please continue to consult Fig. 4, sheath 3, its length is greater than the length of the needle tubing 1 of front end, the front end of sheath 3 is open, the shape of inner chamber cross section 31 is similar to the shape of stop platform 22 cross sections, fixed convex 32 can be arranged on the inwall, it can be in being fitted into sheath 3 between the stop platform 22 and shell fragment 25 on the needle stand 2, the needle tubing 1 that drives needle stand 2 and front end thereof by the frictional force between wall of contacting with them moves with sheath 3, again please in conjunction with Fig. 5,6,7, or in another money design of principle of uniformity, by the jack on the sheath 3 33, replace fixed convex 32 on the inwall with the latch 34 that inserts, place between stop platform 22 and the shell fragment 25, chimeric fixedly needle stand 2 is in sheath 3, and it is mobile with sheath 3, the rear port of sheath 3 is retraction rings 35, maximum outside diameter after its diameter resets less than the external diameter of stop platform 22 outer most edge on the needle stand 2 and shell fragment 25 can not have or have the wing handle of being convenient to grip 36 on the outer wall of sheath 3, and wing handle 36 can be and singlely also can be several, can directly be connected on the latch 34, also can be positioned at sheath 3 foremost or other position; See also Fig. 2,3,4 catheter connecting portions 27 with needle stand 2 rear portions of catheter firmly link to each other.

According to above-mentioned invention structure, when the operation inserting needle, grip the wing handle 36 on sheath 3 or its outer wall, by the chimeric friction between stop platform 22 and sheath 3 inwalls, and fixed convex 32 or the latch 34 that inserts place chimeric fixing between the stop platform 22 that is assemblied in needle stands 2 in the sheath 3 and the shell fragment 25 on sheath 3 inwalls, the needle tubing 1 that related needle stand 2 and front end thereof connect,, inserting needle mobile with sheath; When the withdraw of the needle is finished in operation, can continue the sheath 3 of fixing blood sampling, transfusion needle in the work original position, extract the latch 34 on the sheath 3, or fixed convex 32 contacts with needle stand 2 that frictional force makes in their relatively-stationary designs between wall at another money of principle of uniformity, with sheath 3 inwalls, directly pull back and open catheter 4, related needle stand 2, needle tubing 1 retreat together, when needle point withdraws from human body, also enter in the sheath 3 immediately; After the shell fragment on the needle stand 2 25 passed through the retraction ring 35 of sheath 3 rear ports, retraction ring 35 just was fixed between the stop platform 22 and shell fragment 25 of needle stand, made sheath 3 be locked in the front end (as shown in Figure 8) of needle stand 2 admittedly behind the whole needle tubing 1 of parcel; As desire pusher sheath 3 by force, then the inboard thin-walled 26 of being separated by with needle lumen 21 of shell fragment 25 roots will break, and exposes the needle tubing 1 in the needle lumen 21, forms significantly and damages, thereby play only for disposable effect.

Above-mentioned is the design outline and the operating principle of the disposable type blood sampling safe in utilization of the present invention, transfusion needle, and the similar product of all and of the present invention purposes, design and design principle ought to belong to protection scope of the present invention.

Claims

1. a disposable type safe in utilization blood sampling, transfusion needle are made up of needle tubing, needle stand, sheath and catheter, it is characterized in that:

Needle stand, there is needle lumen in central authorities, fixedly the needle tubing of insertion is positioned at the front end of needle stand, there is the stop platform front portion, the shape of its cross section is similar to the shape of sheath lumen cross section, makes the two can be chimeric mutually, and there is the shell fragment seat at the needle stand middle part, the several piece shell fragment that fixedly connected jag formula is arranged on it, the rear portion of needle stand then have the catheter connecting portion firmly to link to each other with catheter;

Sheath, its length is greater than the needle tubing length of front end, front end is open, and the shape of inner chamber cross section is similar to the shape of the cross section of stop platform, and rear port is a retraction ring, maximum outside diameter after its diameter resets less than the external diameter of stop platform outer most edge and shell fragment, on the inwall of sheath fixed convex can be arranged, or in another money design of principle of uniformity, by the jack on the sheath, replace fixed convex on the jacket inner wall with the latch that inserts, on outer wall, can not have or have single or several wing handles.

2. disposable type blood sampling safe in utilization according to claim 1, transfusion needle, it is characterized in that: described shell fragment, its inboard and needle lumen that is connected root with the shell fragment seat only is separated by with thin-walled.

3. disposable type blood sampling safe in utilization according to claim 1, transfusion needle, it is characterized in that: described stop platform, maybe can there be evagination on its surface.

4. disposable type blood sampling safe in utilization according to claim 1, transfusion needle, it is characterized in that: fixed convex can be between stop platform that is fitted into needle stand in the sheath and shell fragment on the described jacket inner wall, and the needle tubing that drives needle stand and front end thereof by the frictional force between wall of contacting with them moves with sheath.

5. disposable type blood sampling safe in utilization according to claim 1, transfusion needle, it is characterized in that: the latch of described insertion, can place between the stop platform and shell fragment that has been fitted into needle stand in the sheath, chimeric fixedly needle stand and moves with sheath in sheath.

6. disposable type safe in utilization blood sampling according to claim 1, transfusion needle is characterized in that: the wing handle on the described sheath outer wall, can directly be connected on the latch, also can be positioned at sheath foremost or other position.