CN101259032A

CN101259032A - Assembled puncture needle

Info

Publication number: CN101259032A
Application number: CNA2008100604307A
Authority: CN
Inventors: 何飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-04-21
Filing date: 2008-04-21
Publication date: 2008-09-10

Abstract

The invention relates to a medical appliance, in particular to a combination puncture needle which comprises a shell, a puncture needle capable of sliding along the axial direction in the shell and a positioning needle arranged at the tail part of shell and capable of being pulled out backwards. A pinhead of the puncture needle can be extruded from the front end of the shell. A needle core of the puncture needle along an axial center is provided with a through hole and a pinhead of the positioning needle is extruded from an in-an-out hole of the pinhead at the front end of the shell, along the axial center of the puncture needle and penetrating a tube center of the pinhead of the puncture needle. Since the positioning needle is assembled on the puncture needle, the invention ensures the positioning and puncturing of a vein done without any letup, thus the positioning needle is not needed to be pulled out first, but the inserting of the puncture needle into a vein along the pinhead of the positioning needle can be carried out directly, guaranteeing the reliability of the puncture needle entering the vein. The combination puncture needle has the advantages that the success rate of the puncture is greatly increased; the patients are effectively prevented from suffering from more pain.

Description

Assembled puncture needle

Technical field

The present invention relates to a kind of medical instruments, a kind of specifically Centesis instrument, it is meant a kind of venous assembled puncture needle that is used to puncture dragon.

Technical background

In the puncture process, insert the conduit of blood vessel, go into by the elbow seal wire guiding of formerly inserting.Inserting of elbow seal wire then is to aid in special-purpose puncture needle to finish.Puncture needle and normal injection needle construction are more or less the same, and also mainly comprise needle tubing and syringe needle two parts, and described needle tubing plays the nook closing member of piston action and forms by syringe with in syringe.Described syringe needle is assemblied on the needle fits boss of described syringe front end by the bell cover of its tail end, and the axle center of described needle fits boss is provided with the through hole that is communicated with syringe needle and syringe.Because puncture needle is used to guide the elbow seal wire, the intracardiac need of its syringe needle tube hold the elbow seal wire and pass, so thicker than normal injection pin syringe needle.At present, common puncture needle has two kinds, and a kind of is Y type pin, and another kind is blue cleansing pin.Wherein, described Y type pin is provided with a Y type syringe needle of fork by the needle tubing of an ordinary construction and an afterbody and forms.The import of described fork is stopped up by elastomeric material.During use, the outlet of affirmation syringe needle behind blood vessel, is inserted the elbow seal wire by a fork import, pass elastomeric material, inserts blood vessel along syringe needle; Blue cleansing pin then is made up of a common puncture syringe needle and a special needle tubing.Described special needle tubing comprises that syringe, axle center establish the nook closing member of through hole and one and the co-axial guiding tube of described nook closing member, described guiding tube front end is fixed in the needle fits boss axis through-hole of syringe front end, the rear end extends in the nook closing member axis through-hole, and described nook closing member axis through-hole rear end import is stopped up by elastomeric material.Described needle fits boss and syringe junction are provided with walks around the guiding tube front end, and is communicated with the blood channel of syringe inner chamber and needle fits boss axis through-hole.This passage is so that after blood enters needle fits boss axis through-hole from syringe needle, walk around the guiding tube front and enter the syringe inner chamber.During use, after the affirmation syringe needle has inserted blood vessel, the elbow seal wire is inserted by nook closing member afterbody axis through-hole, pass elastomeric material, insert blood vessel along axis through-hole, guiding tube, syringe needle then.

The common wire-feeding pipe of putting the elbow seal wire that send is that a front end is straight, and the spiral hard tube in rear end has the opening that can shift its inner seal wire with thumb onto in the rear end of the straight end pipe of its front end.The pipe diameter that this section is straight enters the mouth less than the puncture needle seal wire.During use, need earlier elbow seal wire shutout to be advanced in this wire-feeding pipe.Then the front end of wire-feeding pipe is inserted the seal wire inlet of puncture needle.Push away the elbow seal wire with thumb in the opening part stranding of wire-feeding pipe, make it the front end elbow along puncture needle syringe needle die intravasation.

Because the syringe needle of puncture needle is thicker, and disposable trial is inserted, and is difficult to again be inserted in the blood vessel, directly looks for vessel position with puncture cushion, can cause very macrolesion to patient.Therefore, in the actual mechanical process, generally all earlier determine the vessel position and the degree of depth, and then change puncture needle and insert blood vessel according to the Position Approximate of having determined and the degree of depth with common fine needle head entry needle.In this process, because need change pin one time, this must make troubles to operation.And the more important thing is that this operational approach will guarantee that puncture needle inserts in strict accordance with the path that fine needle inserts, be unlikely.Even the doctor is very skilled to this operation, and supports and held suitable skill, also being difficult to assurance at every turn can both disposable success.For the general doctor, often need for the second time, even puncture for the third time can be successful.This increases work efficiency not only bad for simplification work, also can be to patient with bigger misery.

Summary of the invention

In order to overcome above-mentioned deficiency of the prior art, the invention provides a kind of novel puncture needle.This puncture needle is applicable to various venipunctures, and earlier by behind the fine needle location, the operation puncture needle makes it directly to enter vein along fine needle during use.Effectively reduced the puncture failure probability, and easy to operate, simplified the puncture procedure process.

For achieving the above object, the present invention has designed a kind of combination puncture needle of being furnished with positioning needle, comprises shell, puncture needle and positioning needle.Wherein said puncture needle is arranged on the sliding intracavity of housing main body part, and can slide before and after described sliding intracavity.Described puncture needle comprises syringe needle, syringe and nook closing member, and its nook closing member is provided with a through hole along the axle center, establishes rubber in this through hole and stops up.Described shell front end is provided with the syringe needle access hole that stretches out shell for the syringe needle of described puncture needle, and the side is provided with for the syringe handle of puncture needle and the nook closing member handle stretches out and the opening of front and back slip within it.Described positioning needle is inserted in the positioning needle plug-in opening of shell afterbody, can directly extract backward, its syringe needle is along described puncture needle axle center, stretches out through the die of the puncture needle syringe needle syringe needle access hole from the shell front end, and its length of stretching out shell equals the greatest length of the extended shell of puncture needle syringe needle.

Described puncture needle syringe needle front end when puncture needle slide rearwardly to terminal point over against the syringe needle access hole of described shell front end or be positioned at it.And when puncture needle during in the enclosure to front slide, its syringe needle can stretch out from described syringe needle access hole.The syringe needle access hole internal diameter size of described shell front end radially wobbles and is advisable so that the smooth discrepancy of puncture needle syringe needle limits it again.

When combination puncture needle of the present invention uses, need to determine vessel position with the positioning needle syringe needle earlier, after definite positioning needle syringe needle front end is in the blood vessel really, hold puncture needle syringe handle, puncture needle is pushed into terminal point forward, according to design parameter as can be known, its syringe needle front end is just concordant with position pin syringe needle front end, promptly also should be in the blood vessel.Errorless for guaranteeing, need pull back puncture needle nook closing member handle, after confirming that having blood to roll is drawn into the puncture needle syringe, extract positioning needle from behind.To put the elbow seal wire that conduit uses then from the puncture needle back along the path that the positioning needle syringe needle is passed and insert blood vessel.In this process, send the flat segments of the wire-feeding pipe front end of putting the elbow seal wire to need long enough, to such an extent as to can extending the puncture needle syringe needle through the axis through-hole of puncture needle nook closing member, installs in the axis through-hole of projection its front end.

In order to be suitable for the common wire-feeding pipe of short flat segments, its a kind of mode can be established a center siphunculus and be formed in described puncture needle.Described center siphunculus front end is fixed on the syringe needle of described puncture needle syringe front end and installs in the axis through-hole of projection, and its rear end extends in the axis through-hole of described puncture needle nook closing member.The length of described center siphunculus satisfy when the puncture needle nook closing member in the puncture needle syringe forward or when sliding backward to terminal, the rear end of center siphunculus remains in the axis through-hole of puncture needle nook closing member.Adopt this structure, sending when putting seal wire, an axle core through hole that only needs front end with the wire feed hard tube to insert the puncture needle nook closing member get final product, and has not needed the special wire-feeding pipe of length flat segments.When adopting this structure, described puncture needle syringe needle is installed the other duct that connection syringe needle and syringe should be set of axis through-hole of projection.So that when pull puncture needle nook closing member, blood can enter the puncture needle syringe from this duct.Can certainly adopt alternate manner to realize this effect.Establish the fin of at least three fixing described center siphunculus such as the axis through-hole inwall that projection is installed at syringe needle.

Another kind of mode, also can establish one and put a conduit in the syringe needle installation projection side of described puncture needle syringe front end, the described oblique preceding axis through-hole that described syringe needle is installed projection that is communicated with of a catheter proximal end of putting, the coulisse that tail end is offered from the shell side stretches out, and can be in described coulisse along with the slip of puncture needle front and back slide; Described putting also is provided with the conduit obstruction in the conduit, so that puncture needle syringe inner chamber can directly not be communicated with by syringe needle with the external world.

For further simplified structure, described puncture needle can not adopt tail end to have the ordinary construction syringe needle of Bell jar.Can directly syringe needle be fixed on syringe needle installs in the axis through-hole of projection.

In the present invention, described shell should be when saturating material, perhaps its side has the perspective window that can be observed puncture needle syringe and positioning needle syringe.

As of the present invention when further changing, be provided with on the contact surface of described shell inner cavity and described puncture needle syringe that puncture needle slip starting point fixes projection and terminal point fixes protruding.Also establish positioning needle at described positioning needle jack inwall and fix projection.

Because the present invention owing to integrated positioning pin on puncture needle, makes blood vessel location and blood vessel puncture accomplish without any letup, and need not extract positioning needle earlier, and directly puncture needle be inserted blood vessel along the positioning needle syringe needle, has guaranteed the reliability of puncture needle intravasation.Improved the success rate of puncture greatly, prevented that effectively patient is subjected to more misery, even had an accident.And use combination puncture needle of the present invention to simplify the process of puncture, reduced operation easier, improved puncture efficient.

Description of drawings

The invention will be further described below in conjunction with drawings and Examples.

Fig. 1 is the structural representation of common registration with pin.

Fig. 2 is the structural representation of common blue cleansing pin.

Fig. 3 is that common blue cleansing pin syringe needle is installed projection internal structure sketch map.

Fig. 4 is that the A-A of Fig. 3 is to profile.

Fig. 5 is the structural representation of first kind of combination puncture needle.

Fig. 6 cuts structural representation open for the part of overlooking of Fig. 5.

Fig. 7 is that first kind of combination puncture needle syringe needle installed projection internal structure sketch map.

Fig. 8 is that the B-B of Fig. 8 is to profile.

Fig. 9 is the structural representation that directly be fixed in syringe front end of first kind of combination puncture needle with syringe needle.

Figure 10 is that syringe needle is installed projection internal structure sketch map in Fig. 9 embodiment.

Figure 11 is that the C-C of Figure 10 is to profile.

Figure 12 is the structural representation of second kind of combination puncture needle.

Figure 13 analyses structural representation for the part of overlooking of Figure 12.

Figure 14 analyses structural representation for the part of facing of Figure 12.

Figure 15 is the syringe needle Bell jar structural representation of second kind of combination puncture needle.

Figure 16 is the structural representation that directly be fixed in syringe front end of second kind of combination puncture needle with syringe needle.

Figure 17 is that the syringe needle of Figure 16 embodiment is installed projection internal structure sketch map.

A kind of improvement structural representation of Figure 18 on the basis of Figure 17 embodiment, making.

Figure 19 is provided with the structural representation of perspective window for the present invention.

Figure 20 is the third embodiment of the present invention.

Figure 21 inserts elbow seal wire structure graph for Figure 20 embodiment.

The specific embodiment

With reference to Fig. 1, normal injection is made up of needle tubing and syringe needle 108 with pin, and described needle tubing comprises syringe 104 and can do nook closing member 102 in axial sliding that in syringe 104 described nook closing member 102 front ends are fixed a plunger 5.Described syringe 104 front ends are provided with syringe needle projection 107 are installed, and the axle center that described syringe needle is installed projection 107 is provided with the through hole 106 of the inner chamber of the die of UNICOM's syringe needle 108 and syringe 104.The tail end of described syringe and nook closing member is equipped with handle 103,101.

With reference to Fig. 2,3,4, existing puncture is identical with the pin general structure with normal injection with blue cleansing pin, and difference is on this basis, has added a center siphunculus 111 again, and establishes through hole 110 in the axle center of nook closing member.The front end of described center siphunculus 111 is fixed on described syringe needle and installs in the axis through-hole 106 of projection 107, and the rear end extends in the axis through-hole 110 of described nook closing member.The afterbody of described nook closing member 102 is provided with rubber in the rear end of its axis through-hole 110 import department and stops up 109.The inside that described syringe needle is installed projection 107 is at the blood channel 112 of the inner chamber of other die that is provided with UNICOM's syringe needle 108 of its axis through-hole 106 and syringe 104.

With reference to Fig. 5,6, in the present invention, first kind of combination puncture needle mainly by shell 203, be arranged on the puncture needles 202 that can slide vertically in the shell 203, the three parts such as positioning needle 201 of the afterbody that is arranged on shell 203 form.Described puncture needle 202 is basic identical with existing blue cleansing pin structure, comprises that nook closing member 209, front end that syringe needle 214, syringe 210, axle center are provided with through hole 208 are fixed on syringe 210 front end syringe needles center siphunculus 211 in the axis through-hole 221 of projection 219 is installed.Described nook closing member 209 front ends are established plunger 212, and its afterbody is provided with a rubber in axis through-hole 208 rear end import departments and stops up 218.Described shell 203 front ends are provided with syringe needle access hole 217, the side, middle part have two symmetric rectangular mouthfuls 206 along the axle center, afterbody is provided with positioning needle 201 plug-in openings, inner most of space is the sliding chamber of described puncture needle 202.The place ahead, the sliding chamber of described puncture needle is provided with Bell jar 213 cavity volumes 215 of puncture needle syringe needle 214, is provided with the fixing plug 216 of rubber between described puncture needle syringe needle Bell jar cavity volume 215 and the described puncture needle syringe needle access hole 217.

The syringe handle 205 of described puncture needle and nook closing member handle 204 stretch out shell 203 from described rectangular mouthful 206.Described positioning needle 201 is inserted in the positioning needle plug-in opening of shell afterbody, its syringe needle 207 passes 216 of puncture needle nook closing member afterbody, through the die of puncture needle nook closing member axis through-hole 208, puncture needle center siphunculus 211, puncture needle syringe needle 214, the fixing plug 216 of rubber and the syringe needle access hole 217 of shell front end, stretch out from the shell front end at last then.Its length of stretching out the shell front end just equals the greatest length of puncture needle syringe needle 214 extended shells.

With reference to Fig. 7,8, in this embodiment, the inwall of puncture needle syringe needle installation projection axis through-hole 221 of the present invention is parallel to axial direction three fins 220 evenly is set, and described puncture needle center siphunculus 211 front ends are fixed by these three fins 220.The space that forms between the inner surface of described center siphunculus 211 outer surfaces and installation projection axis through-hole 221 is UNICOM's puncture needle syringe needle Bell jar 213 inner chambers and puncture needle syringe 210 inner chambers just.

With reference to Fig. 9, this embodiment is the improvement embodiment of making on Fig. 5,6 bases, its improvements are that the tail end of described puncture needle syringe needle 214 is not established Bell jar, but the syringe needle that directly is fixed on syringe 210 front ends is installed in the axis through-hole 221 of projection 219.And described axis through-hole 221 also divides two sections difference designs, leading portion and syringe needle 214 external diameter tight fit and liquid sealings.The back segment inner surface is established the center siphunculus identical with showing structure described in Fig. 7,8 and is fixed fin 220, shown in Figure 10,11.

First kind of combination puncture needle of the present invention use is as follows:

Get this combination puncture needle, the hand-held housing main part is inserted the conventional puncture venous of patient estimated position with the positioning needle syringe needle, and pull positioning needle nook closing member flows into the positioning needle syringe as visible blood backward, can determine that the positioning needle needle tip is in the vein blood vessel.Push away puncture needle when a little forward, make it to slide into forward foremost in the enclosure, at this moment, according to design condition---length that the positioning needle syringe needle stretches out shell equals the greatest length of the extended shell of puncture needle syringe needle---as can be known, the puncture needle needle tip also should be in the vein blood vessel.For further confirmation, next pull puncture needle nook closing member backward if having blood to flow in visible its syringe, just proves the puncture success.Extract positioning needle from the shell afterbody then, and will put effective elbow seal wire and insert vein blood vessel from the shell afterbody along positioning needle route that syringe needle is walked, so far, the task of this combination puncture needle has just been finished.

With reference to Figure 12,13,14,15, in the present invention, second kind of combination puncture needle is identical with first kind of combination puncture needle general structure.Its difference is, is not provided with the center siphunculus 211 that guiding elbow seal wire is used in the former the puncture needle syringe 210.But opened a through hole 224 that leads to the syringe needle die in the side at puncture needle syringe needle 214 afterbody Bell jars 213 front end fixed needle places, seal wire guiding tube 223 of plug-in mounting in this through hole 224.Described guiding tube 222 afterbodys stretch out from the shell side, and the length that can offer on shell is met to do in 225 and moved forward and backward.Described guiding tube afterbody import department is provided with a rubber stopper 222.

With reference to Figure 16, do further improvement on the basis of a last embodiment, cancellation puncture needle syringe needle 214 aft mounted Bell jars 213, and the syringe needle that directly syringe needle 214 is fixed on puncture needle syringe 210 front ends is installed in the axis through-hole 221 of projection 219.And a through hole 224 that leads to the syringe needle die, the front end of its internal fixation guiding tube 223 are opened in the side that projection 219 is installed at syringe needle.In the present embodiment, the through hole 224 of described fixed guide pipe 223 can be located at syringe needle the part that projection axis through-hole 221 is used for fixing syringe needle is installed, can be located at also that syringe needle does not prolong and part, when selecting the former, need are opened an import 226 in the position of the through hole of the corresponding fixed guide pipe of syringe needle sidewall, shown in Figure 17,18.

With reference to Figure 19, corresponding puncture needle syringe in described shell 203 sides and positioning needle syringe place are provided with a perspective window 227,228 respectively.

Of the present invention second kind the combination puncture needle, make process identical with first kind of cardinal principle, difference is, extract positioning needle after, the elbow seal wire is inserted vein blood vessel through the seal wire guiding tube.

With reference to Figure 20, the simplest embodiment of the present invention is, do not establish center siphunculus 211 in puncture needle nook closing member axis through-hole, installs on the projection at puncture needle syringe needle or syringe needle and do not establish fixed guide pipe 223.When adopting the combination puncture needle of this all structure to insert elbow seal wire 230, need be used the wire-feeding pipe 229 that flat segments is long.Its length need satisfy: its front end can extend the puncture needle syringe needle and install in the axis through-hole 221 of projection, as shown in figure 21 through the axis through-hole 208 of puncture needle nook closing member.

What should be understood that is: the foregoing description is just to explanation of the present invention, rather than limitation of the present invention, and any innovation and creation that do not exceed in the connotation scope of the present invention all fall within protection scope of the present invention.

Claims

1, a kind of combination puncture needle, comprise shell (203), puncture needle (202) in the enclosure vertically can slide, the positioning needle (201) that is arranged on the shell afterbody and can extracts backward, described shell (203) front end is provided with the syringe needle access hole (217) that stretches out shell for the syringe needle (214) of described puncture needle (202), the side is provided with for the syringe handle (205) of puncture needle (202) and nook closing member handle (204) stretches out and the opening (206) of front and back slip within it, the nook closing member (209) of described puncture needle (202) is provided with a through hole (208) along the axle center, establish rubber in this through hole (208) and stop up (218), the syringe needle (207) of described positioning needle (201) is along described puncture needle axle center, stretch out through the die of puncture needle syringe needle (214) the syringe needle access hole (217) from the shell front end, its length of stretching out shell (203) equals the greatest length of the extended shell of puncture needle syringe needle (214).

2, combination puncture needle according to claim 1, it is characterized in that, described puncture needle syringe needle (214) front end when puncture needle (202) when slideing rearwardly to terminal point over against the syringe needle access hole (217) of described shell front end or be positioned at it, and when puncture needle (202) during in shell (203) slides forwards, this syringe needle can stretch out from the syringe needle access hole (217) of described shell; Described positioning needle (201) is inserted in the positioning needle jack of described shell afterbody.

3, combination puncture needle according to claim 2, it is characterized in that, syringe needle installation projection (219) side of described puncture needle syringe (210) front end is provided with one and puts a conduit (223), the described oblique preceding axis through-hole (221) that described syringe needle is installed projection (219) that is communicated with of a conduit (223) front end of putting, the coulisse that tail end is offered from the shell side (225) stretches out, and can be in described coulisse (225) along with the slip of puncture needle (202) front and back slide, described putting is provided with conduit obstruction (222) in the conduit (223), described positioning needle syringe needle (207) passes described rubber obstruction (218) from the afterbody of described puncture needle nook closing member (209), pass from puncture needle nook closing member axis through-hole (208) then, pass through puncture needle syringe needle die again, stretch out from the shell front end at last.

4, combination puncture needle according to claim 2, it is characterized in that, also being provided with a center siphunculus (211) in the described puncture needle forms, described center siphunculus (211) front end is fixed on the syringe needle of described puncture needle syringe front end and installs in the axis through-hole (221) of projection (219), its rear end extends in the axis through-hole (208) of described puncture needle nook closing member, the rubber that is provided with in the axis through-hole of described puncture needle nook closing member (208) stop up (218) be positioned at axis through-hole (208) rear end described center siphunculus (211) touch less than the position, described positioning needle syringe needle (207) passes described rubber obstruction (218) from the afterbody of described puncture needle nook closing member (209), then through center siphunculus (211), the die of puncture needle syringe needle (214) stretches out from the shell front end at last.

5, combination puncture needle according to claim 4 is characterized in that, axis through-hole (221) inwall that described puncture needle syringe needle is installed projection (219) is provided with at least three fins (220) of fixing described center siphunculus (211).

According to claim 3,4 or 5 described combination puncture needles, it is characterized in that 6, the length that described positioning needle syringe needle (207) stretches out from shell (203) front end equals the greatest length of the extended shell of puncture needle syringe needle (214) (203).

7, combination puncture needle according to claim 6 is characterized in that, described positioning needle jack inwall is provided with positioning needle and fixes projection.

8, combination puncture needle according to claim 6 is characterized in that, described shell (203) is a transparent material, and perhaps its side has the perspective window (228,227) that can be observed puncture needle syringe (210) and positioning needle syringe.