CN1387448A

CN1387448A - Over-needle catheter insertion device

Info

Publication number: CN1387448A
Application number: CN00815200A
Authority: CN
Inventors: 克里斯托弗·约翰·克拉克
Original assignee: NMT Group PLC
Current assignee: NMT Group PLC
Priority date: 1999-11-03
Filing date: 2000-10-16
Publication date: 2002-12-25
Also published as: NO20022106D0; NO20022106L; GB9925890D0; MXPA02004396A; EP1225947A1; KR20020071857A; ZA200204369B; CA2388672A1; GB2355933A; JP2003512903A; GB2355933B; WO2001032253A1; AU7807000A

Abstract

There is disclosed a catheter device of the kind referred to comprising a needle extending from a support means, a catheter extending from a catheter hub, means for pushing the hub over the needle to advance the catheter forwardly from the needle and slidable along guide means having stop means at its forward end, the means for pushing the hub having a shield at its forward end in which the needle tip locates when the pushing means is arrested by said stop means.

Description

Over-needle catheter insertion device

The present invention relates to a kind of pipe guide, wherein conduit is inserted in the blood vessel by making conduit formerly thrust on the pin of blood vessel progressive mode.After catheter positioning, remove and throw away pin and supporting arrangement thereof.

The object of the present invention is to provide a kind of pipe guide; wherein the tip of pin automatically is protected at the place, end that conduit inserts, and the potential danger of hepatitis and AIDS virus infection minimizes thereby make the danger of accidental needle sticks injury and working healthily personnel for example be subjected to.

According to the present invention, a kind of pipe guide is provided, it comprises: the pin that stretches out from a supporting arrangement; The conduit that from a catheter hub, stretches out; Be used on pin, promoting sleeve so that conduit advances forward with respect to pin and the device that can slide along the guider that has stop device at its front end; This is used to promote telescopic device and has a protective cover, and syringe needle is arranged in this protective cover when thrust unit is stoped by described stop device.

Being used to promote telescopic device can cooperate with guider, thereby prevents adverse movement.

Supporting arrangement can include and refer to folder, and guider refers to extend the folder from this.

Guider can comprise the finger that pair of parallel separates, and this finger is passed the opening that is used for promoting telescopic device.

Finger can be combined with the helical teeth device, and this helical teeth device cooperates with above-mentioned opening, to prevent to be used to promote telescopic device adverse movement.

Finger can be bent upwards at their front end, so that protective cover tilting to the final stage of front travel, thereby syringe needle will be arranged in the flange back of protective cover.

Can further understand the present invention from following description and with reference to accompanying drawing, these accompanying drawings just demonstrate the pipe guide of two kinds of forms in the mode of embodiment.

Fig. 1 demonstrates the perspective view of the device of first kind of form in initial position;

Fig. 2 demonstrates the perspective view of the device of Fig. 1 at the place, centre position;

Fig. 3 demonstrates the pin and the perspective view of its supporting arrangement after removing of the device of Fig. 1 from catheter hub;

But it is the perspective view of the device of second kind of form that Fig. 4-6 demonstrates similar with Fig. 1-3;

Fig. 7 demonstrates the cutaway view of cutting open along the straight line VII-VII of Fig. 6 that passes thrust unit.

Referring now to Fig. 1 in the accompanying drawing-3, as can be seen, the pipe guide of first kind of form comprises and refers to press from both sides 10 that it is equipped with the hollow needle 11 that extends forward, and this pin passes conduit 12 and catheter hub 13, and described conduit 12 stretches out from described catheter hub 13.

Sleeve impeller 14 with the cylindrical shape protective cover 15 that extends forward can slide on pin 11, so that conduit 12 and sleeve 13 travel forward.

The guiding finger 16 of parallel interval is extended forward from refer to folder 10, and passes the opening 17 of impeller 14.

Helical teeth 18 on the finger 16 matches with opening 17, in case the adverse movement of thrust moving part 14.

Retainer 19 at finger 16 front end places stops to travel forward of impeller 14 when sleeve 13 has been removed pin 11, and protective cover 15 surrounds syringe needle on this position.

In use, manipulation refers to press from both sides 10 so that the tip of pin 11 is injected in the blood vessel.Pin 11 has opening in the back of its open front at Qi Bizhong, thereby can see blood when pin 11 has lunged blood vessel in conduit 12, so that the insertion of adjusting pin.

Impeller 14 moves forward, so that in conduit 12 intravasations.

In the proal final stage of the trip, sleeve 13 and pin are unclamped, and the protected cover 15 of syringe needle surround and can not bounce back from impeller and to begin to keep protected state.Remove and throw away with pin with at all parts shown in Fig. 3, thereby stay conduit and sleeve is motionless.

Referring now to Fig. 4-7, wherein identical parts are represented that by identical reference number as can be seen, the device of this second kind of form has substantially similarly structure.In this embodiment, finger 15 is bent upwards at their front end places, so that protective cover 15 tilts in its final stage to front travel, thereby makes syringe needle be located at flange 20 back at the front end place of protective cover 15.

The front end of finger be bent upwards such setting so that when they are parallel with skin, pin will be in the correct angle that is used for puncture vessel.

Equally, in this embodiment, retainer 19 back on each finger 16 have monodentate 18.

The same with foregoing embodiment, as can be seen from Figure 7, have opening 30 in the most advanced and sophisticated back of pin 11.

In these two embodiment, the gap between the rear end of pin 11 and impeller 14 all just is used to provide and is slidingly matched, thereby advancing of impeller 14 is used for from pin 11 blood wiped and enter into cavity 40 in the impeller 14.

Be understandable that, do not plan the present invention is limited only within on the foregoing description,, it is evident that under the situation that does not break away from the scope of the invention that limits by appended claims, many variations to be arranged for the person of ordinary skill of the art.

Therefore, for example can adopt single guiding finger to replace the finger of pair of parallel.

Each embodiment can comprise and is used to indicate blood to arrive device near that end of the pin (reflection) that refers to folder 10.This can be by for referring to that folder 10 is provided with the chamber (not shown) and realizes that wherein pin leads to this chamber, thereby enter into this chamber along the blood that pin length is passed through.This chamber can comprise observation window, and perhaps it can limit by the wall that is made of complete material transparent to small part, and the blood that enters into chamber like this can be observed by implementing that conduit is installed in patient people on one's body.

Claims

1. pipe guide comprises: the pin that stretches out from a supporting arrangement; The conduit that from a catheter hub, stretches out; Be used on pin, promoting sleeve so that conduit advances forward with respect to pin and the device that can slide along the guider that has stop device at its front end; Be used for promoting telescopic device when thrust unit is stoped by described stop device, it has a protective cover at the front end place of laying syringe needle.

2. pipe guide as claimed in claim 1 is characterized in that, supporting arrangement includes and refers to folder, and guider refers to stretch out the folder from this.

3. pipe guide as claimed in claim 1 or 2 is characterized in that guider comprises the finger that pair of parallel separates, and they are passed in the opening that is used for promoting telescopic device.

4. as each described pipe guide among the claim 1-3, it is characterized in that, describedly be used to promote telescopic device and cooperate, to prevent adverse movement with guider.

5. pipe guide as claimed in claim 4 is characterized in that finger is equipped with the helical teeth device, and this device cooperates with described opening, to prevent to be used to promote telescopic device adverse movement.

6. pipe guide as claimed in claim 3 is characterized in that the front end of described finger is bent upwards, so that protective cover tilts to final stage of front travel at it, thereby syringe needle makes the flange back that is arranged in protective cover.

7. pipe guide as claimed in claim 6 is characterized in that, being provided with like this of described finger front end to front curve, so that when they are parallel with skin, pin will be in the correct angle that is used for puncture vessel.

8. as claim 6 or 7 described pipe guides, it is characterized in that the stop component back on each finger has single helical teeth, be used for preventing that thrust unit is in its adverse movement after front travel has finished.

9. as the described pipe guide of the arbitrary claim in front, it is characterized in that having opening in the pin wall of syringe needle back, thereby when pin stings blood vessel, can in conduit, see blood.

10. as the described pipe guide of the arbitrary claim in front, it is characterized in that, between impeller and the pin for being slidingly matched, thereby cavity in the impeller is wiped blood and enter in advancing from pin of impeller.

11. as the described pipe guide of the arbitrary claim in front, it is characterized in that, be provided with near the device of blood that is used to observe the supported end that flow to hollow needle.