CN1091616C

CN1091616C - Catheter for the injection of medicines

Info

Publication number: CN1091616C
Application number: CN 94102053
Authority: CN
Inventors: B·赫夫林
Original assignee: Bavaria Medizin Technologie GmbH
Current assignee: Bavaria Medizin Technologie GmbH
Priority date: 1994-02-23
Filing date: 1994-02-23
Publication date: 2002-10-02
Anticipated expiration: 2014-02-23
Also published as: CN1107369A

Abstract

The present invention relates to a catheter in body cavities for injecting medical fluid in veins or other hollow organs. The present invention is provided with a head which can be inserted in body cavities and an operating mechanism, wherein the head comprises a needle head which can be movably arranged in the head between a retraction position and an extension position, the operating mechanism is installed on an end head of a catheter corresponding to the head and is connected with the needle head to operate together with the needle head, the front end of the needle head moves outwards to contact the wall of the body cavity, and fluid or medicine can be directly supplied to a wall of the body cavity to be treated through the hollow needle head. A balloon is arranged on the front surface of the head of the catheter, and the balloon can charge and discharge fluid through a channel which passes through the catheter in an extension mode.

Description

The conduit that is used for injectable drug

The present invention relates to a kind of being used for is injected into conduit in the wall of hollow organ or other body cavity with medicine or other fluid.

Concerning patient's medical treatment, the Therapeutic Method that makes medicine can be applied directly to specific infection site or lesions position is favourable.Treat in the blood vessel of for example hollow organ, body cavity or particularly tremulous pulse through proposing various medicine can being fed in connection with the conduit at the position of tissue to be treated.Simple catheter in this type is that the adjacent pipes front end has one or more openings or or even porous transfusion catheter.Thereby these transfusion catheters expand closely to contact with blood vessel wall and medicine directly is fed in the tissue to be treated.A kind of vessel shape sacculus (porous sacculus) so just can be provided, this sacculus has a lot of apertures, and when feeding the medicine of pressurization, expand, thereby closely contact with the wall of this sacculus placement tremulous pulse within it, medicine can be fed in the tissue of adjacency under pressure.

But a shortcoming of such device is that using of medicine is only effective in a short time, and formulation rate is uncertain.If use simple transfusion catheter, medicine also may be taken away soon.Therefore may need infusion treatment is extended to the drug level that reaches a supposition over these days at position to be treated.This just needs one long period toward institute, and has increased the risk of infection or other complication.Also have a shortcoming to be, treatment can not be carried out in a single operation simultaneously with expansion step.

The object of the present invention is to provide in a kind of wall that needs dispenser of in a kind of simple and mode safety medicine being used, particularly is applied directly to body cavity, hollow organ or blood vessel in inside and the conduit of above-mentioned shortcoming can not occur.

A kind of being used for fluid, for example the medicine injection enters the endoceliac conduit such as vein or other hollow organ, be provided with one and can insert endoceliac head, this head has one to have longitudinal axis and can insert this endoceliac conduit shell of passage insertion by one, and include the syringe needle that can between retraction and extended position, set within it movably, also be provided with on the termination relative that is installed in conduit and be connected on the syringe needle and operate with syringe needle with head, make the front end of syringe needle outwards move wall to contact with body cavity, fluid or medicine directly are fed to the operating mechanism of the wall portion to be treated of body cavity by hollow pinhead.In the front of conductor housing a sacculus can be set, this sacculus can charge and discharge fluid by the passage of a stretching, extension by conduit.

The syringe needle of conduit remains in the outer pipe shell of conduit on the retracted position, and on this position, conduit can insert a hollow organ or intravenous, particularly insert intra-arterial.Conduit also is provided with a device that is used for syringe needle is released conduit.This action is starting and implementation when conduit is in desired position.During this step, syringe needle engages with wall.Syringe needle has the internal channel of hollow, and medicine can enter in the tissue by this internal channel injection.The needle pierces blood vessel wall causes perforation, and still, because syringe needle is very little, therefore perforation is not remarkable, thereby the damage that can not cause bleeding.This step also provides the medicine with given deal to stockpile in in-house probability.

For mobile syringe needle, an interior flexible pipe can be set in conduit, flexible pipe can move with respect to outer pipe shell vertically in this, and syringe needle is mounted within it and syringe needle can be driven by flexible pipe in this engage or the piercing blood vessel wall.Syringe needle can also be installed on the expandable sacculus shape housing.In the case, the motion of syringe needle realizes by housing is pressurizeed.Can also syringe needle can be moved together in conduit for syringe needle is provided with extension with its extension.

Medicine or fluid enter from the end that is located at outside the human body of conduit.If it is too dark to wish that medicine is not wanted the intravasation wall, needle point should be arranged to make its front end face of splaying of following blood vessel wall to engage only to thrust blood vessel wall slightly or be arranged to be parallel to blood vessel wall.Just can realize with the catheter shaft line parallel as far as possible by the front end face of syringe needle being arranged to make the syringe needle that stretches out.Use with optimal way in order to ensure medicine, wish that syringe needle thrusts in the tissue slightly.Therefore, end face tangent line in front just should not be parallel to needle axis exactly, but at least one low-angle of deflection make syringe needle not only smooth tissue, and, the front end of syringe needle can be embedded in the tissue slightly.

The angle of applied force and needle point will determine that needle point penetrates the degree of depth of tissue during operation, therefore just might for example realize the in check injection of the degree of depth at a predetermined position to a blood vessel wall.Certainly needle point will carry out cutting according to required application requirements, can for example make blunt, rounding or cut out the slope.

According to another embodiment of the present invention, syringe needle is through adding mechanical stress in advance, that is, syringe needle has an intrinsic radian in its front portion, thereby makes syringe needle drive and outwards to bend towards blood vessel wall when stretching out being operated mechanism.If the soft understrressing that adds in advance that makes of syringe needle is to drive syringe needle towards blood vessel wall, the front end of conduit can be provided with the syringe needle guiding device of syringe needle is crooked by controlled way and the blood vessel wall that leads.

In a specific embodiments, operating mechanism is one and can is along the longitudinal movement and comprises that many front ends from conduit are stretched over the multi-cavity flexible pipe of the passage of its offside with respect to conduit.The syringe needle that makes it bending when unfettered through prestress is arranged in these passages at the front end of conduit.Move in the outer pipe shell of conduit by the multi-cavity flexible pipe, can make syringe needle energy extending longitudinally, because the state of its prestress, the syringe needle excurve is to blood vessel wall.In order to operate syringe needle, conduit is provided with a mechanism on its end relative with its front end, and this mechanism has two parts basically: first is connected on the conduit outer pipe shell, and second portion is connected on the multi-cavity flexible pipe.Two parts separately make syringe needle be contained in the outer pipe shell of conduit under normal condition by a spring.Force two parts to be drawn close in opposite directions and make the multi-cavity flexible pipe, syringe needle is pushed stretch out the front end of conduit in the outer pipe shell slides forwards.

If it is overhanging that the sacculus shape housing of syringe needle by a pressurization forces, just can utilize a similar device to operate, wherein, pressure is got together by two parts that force operating mechanism and is produced.

Also possible is, syringe needle has in the total length that is arranged on conduit and is connected to tubulose extension on the operating mechanism at the other end, and syringe needle can vertically move in conduit so that syringe needle skids off the front end of conduit by this operating mechanism.Medicine just can be introduced under pressure in the syringe needle extension in the operating mechanism then.

In another embodiment of the present invention, the sacculus of a common type is set directly at the front of the injection head of conduit, wherein, a guide wire is arranged on the conduit outside and only passes inner chamber (monorail) in the stretching, extension of sacculus zone, as United States Patent (USP) 5,154,725 is described.It would, of course, also be possible to uses a stretching, extension to pass the guide wire of whole conduit shell, injection head and sacculus.

Adopt such device, the Drug therapy of tissue can not need to change conduit with the expansion step combination in a kind of favourable mode in a single operation, and this just reduces the operating time widely, has also reduced the pressure to the patient.In addition, a kind of like this injection-bonded conduit of sacculus formula provides probability that therapeutic modality maked decision to the doctor at conduit when inserting in the blood vessel.Can also be considered as advantageously, the front that sacculus is arranged on injection head provides a kind of very level and smooth passage to widen.After injecting step,, can more once reach the drug distribution that causes the best and eliminate the possible mechanically deform that conduit causes balloon expandable if think fit.At last, treat than more economical with a single injection-balloon catheter with two conduits discrete, that be used for same purpose.

Other features and advantages of the present invention, by below in conjunction with accompanying drawing to the description of embodiment and more clear.In the accompanying drawings:

Fig. 1 is vertical schematic sectional view of conduit of the present invention, syringe needle is shown is in retracted position;

The syringe needle that Fig. 2 illustrates the conduit of Fig. 1 is in the state of extended position;

Fig. 3 illustrates the operating mechanism that is used for a multi-cavity flexible pipe in the mobile conduit;

Fig. 4 is the transverse sectional view of another embodiment of the present invention;

Fig. 5 illustrates another embodiment of conduit of the present invention;

Fig. 6 illustrates the operating mechanism of the syringe needle in the conduit that is used for mobile Fig. 5;

Fig. 7 is the partial sectional view of the amplification seen of the cutting line VII-VII along Fig. 5;

Fig. 8 is the longitudinal sectional view of the head of a combination injection-balloon catheter seeing of the cutting line VIII-VIII along Figure 11;

Fig. 9 illustrates the operating mechanism that fills/release body joint injection needle and that have medicine joint and sacculus that is used to move in a conduit;

Figure 10 is the transverse sectional view that the cutting line X-X along Fig. 8 sees;

Figure 11 is the transverse sectional view that the cutting line XI-XI along Fig. 8 sees.

Fig. 1 illustrates one can well-known way insert the intravital conduit 10 of people on guide wire.Conduit comprises the outer pipe shell 12 that a conductor housing 14 is housed on its termination, and this outer pipe shell 12 has longitudinal axis and can insert passage by one and insert in the human body body cavity, and conductor housing 14 can be connected on the outer pipe shell 12 securely by welding or gummed.Conductor housing 14 comprises an extending longitudinally passage 16 that is used to hold guide wire 5.In addition, interior flexible pipe 20 is located in the outer pipe shell 12 so that can vertically move within it.Flexible pipe 20 has a central passage 22 that is provided with guide wire 5 in it.Flexible pipe 20 also is provided with a plurality of passages 24 (chamber), and a plurality of hollow pinheads 26 are contained on the passage 24 in catheter proximal end.Conductor housing 14 includes a plurality of cannelure or grooves with suitable shape (seeing Figure 11), and these grooves terminate in the lateral opening 28 of conductor housing or terminate in the falling in figure's or taper the front end of conductor housing.

Hollow pinhead 26 is through pre-bending, so they have also prevented rotation owing to the cell wall with opening 28 engages with regard to remaining on it outwards is pressed against under the mechanical stress on the outer pipe shell 12 passage 24 in.By interior flexible pipe 20 is outwards slided in outer pipe shell 12, syringe needle 26 is pushed ahead, because through pre-bending, syringe needle 26 outwards stretches, with the contact of the blood vessel wall of adjacency, or even the piercing blood vessel wall to touch tunica adventitia of artery, this will depend on how the operator operates this device according to its experience.Also might force syringe needle to excurvation by syringe needle is moved along the inwall of opening 28.After syringe needle 26 stretches out, medicine can be gone up unshowned syringe needle passage by passage 24 with figure and supply in the tissue.Medicine penetrates from the end face 30 of syringe needle 26.The end face 30 of syringe needle 26 preferably is arranged to make it longitudinally to be parallel to the stretching, extension of conduit axis.This means these zone 30 smooth blood vessel wall of syringe needle and just through the power that applying increase could insert organize in.If wish syringe needle is entered in the tissue, preferably provide a syringe needle end face that is not parallel to the conduit axis this moment to penetrate tissue to help syringe needle.Can certainly adopt the syringe needle front end corner cut of other shapes to realize that darker tissue penetrates according to specific instructions for use.In the embodiment of Fig. 1 and 2, be provided with a plurality of syringe needles 26, and be arranged to make it to stretch out simultaneously from conduit 10 on a plurality of sides at conduit 10 to front slide by interior flexible pipe 20, conduit is also being supported on blood vessel wall with one heart in all side upper supports.Subsequently, surface 30 blood vessel wall that reclining perhaps are cut into the wall of piercing tissue under the situation that pierces through angle on surface 30, thereby have avoided not wishing that the medicine that occurs washes away.Simultaneously, realized the good contact of end face 30 with blood vessel wall.

For good supporting is provided, to adopt three syringe needles at least.But any syringe needle number can be used, and syringe needle can distribute on the cross section of conductor housing equably or unevenly.Adopt the syringe needle of big figure that the medication amount that imports by syringe needle also can be increased.But, concerning very narrow blood vessel or vein, may not have enough spaces and hold a big conduit.Thereby may only use single syringe needle.

If when adopting a plurality of syringe needle owing to the probability that will realization obtains advantages of higher stability and introduce bigger medication amount, preferably a kind of multi lumen hose of interior flexible pipe 20.

Fig. 3 illustrates the operating mechanism 32 that in the conduit of a kind of Fig. 1 of can be used for and 2 syringe needle is moved in conduit.This operating mechanism contains two

parts

34 and 35 basically.Part 34 is fixed with respect to conduit, thereby is called static part 34.On the other side is moving part 35.Outer pipe shell 12 is connected to securely that interior flexible pipe 20 then is connected on the moving part 35 on the static part 34.Flexible pipe 20 can only move axially in outer pipe shell 12 in

guide structure

36 and 38 on motionless and moving

part

34 and 35 cooperatively interacted and becomes to make.Two

parts

34 and 35 are offseted away by a spring 40.The front end of guide structure 38 is chosen to make syringe needle 26 under normal circumstances to be in as shown in Figure 1 retracted position with the distance of the backstop that is oppositely arranged.If moving part 35 moves towards static part 34, interior flexible pipe then moves towards the front end of conduit, when arriving as shown in Figure 2 syringe needle and contact the position of blood vessel wall owing to its pre-bending state till.

Flexible pipe 20 was connected on the moving part 35 and inner chamber 42 continues across the back side of part 35 in Fig. 3 illustrated, and has a guide wire 5 and stretch the opening 44 that passes through on this back side.Medicine is fed in the distributor chamber 46 by a side joint chair 45, is fed to syringe needle 26 by passage 24 then.

Fig. 4 is the transverse sectional view of another embodiment of conduit.This conduit 50 comprises an outer pipe shell 12 and the guide wire 5 in catheter center.This shell 12 has syringe needle 54 can be by they outwardly directed a plurality of holes 52 in the conduit.

Syringe needle 54 is installed on the interior flexible pipe 56.Another root flexible pipe 58 is arranged between interior flexible pipe 56 and guide wire 5, and the elasticity of this root flexible pipe is enough to make it to expand into the sacculus shape when the fluid through pressurization carries out in the space between

flexible pipe

56 and 58, till flexible pipe 56 reclines outer pipe shell 12.Such expansion outwards promotes syringe needle 54 by hole 52, makes syringe needle follow circumjacent blood vessel wall to engage or even pierces through this blood vessel wall.Shown in example in, the shape of needle point is with Fig. 1 different with shown in 2.The end face of needle point is not to be parallel to the conduit axis, thereby makes needle point can penetrate in the blood vessel wall or penetrate in the tissue of adjacency.A kind of like this advantage of structure is mentioned in front.Front end face 30 with first embodiment is provided might for certainly syringe needle 54 equally is the front end face 60 of blood vessel wall of flatly reclining.

In the embodiment shown in fig. 4, the separate channels in the hole 55 of medicine by being connected to the syringe needle root is fed to syringe needle, and the space between

flexible pipe

56 and 58 is pressurization independently then.This has just been avoided the remarkable shortcoming of known now sacculus shape expandable catheter, and this is because even under the high bulbs of pressure, medicine still can for example be used under low-pressure.In addition, the degree of excursion that can select respectively of each syringe needle causes the different penetration depth of each syringe needle, this just make medicine can be administered in the internal layer of different positions, for example blood vessel, in the blood vessel wall or be stored in the zone of blood vessel.In addition, advantageously expansion can be used as two obvious steps isolating, that can control respectively with medicine injection and handles.For this purpose, the fluid through pressurization can use with the operating mechanism that medicine separates the known type of supply.

Adopt the mechanism of such operation conduit 50, be imported into the space of

flexible pipe

56 and 58, expansion can be carried out independently in order to the bulbs of pressure of flexible pipe 56 in expanding.Medicine is supplied to by one of this operating mechanism discrete adapter and is connected in the passage in the space on the syringe needle, between syringe needle.Two embodiment have such advantage: use

syringe needle

26 or 54 medicine can be administered on the specific region of blood vessel wall with accurately controlling.Use has the degree of depth that the syringe needle of the front end face of given shape also sends into surrounding tissue to the penetration depth and the medicine of syringe needle provides to a certain degree control.

Fig. 5 illustrates another embodiment 110 of conduit, wherein, flexibly outwards the syringe needle 26 of pre-bending have integrally formed and stretch the tubulose extension 126 of the passage that passes a multi-cavity flexible pipe with syringe needle, these passages enough greatly so that this extension can vertically move within it.

Front end at this multi-cavity flexible pipe is fixed with an outer pipe shell 112, syringe needle in this outer pipe shell, be guided and can the retraction outer pipe shell in.With the catheter proximal end 14 of outer pipe shell 112 cooperatings, as previously mentioned, be shaped as make this flexibly the syringe needle 26 of pre-bending when stretching out, guided suitably.According to Fig. 5 and Fig. 7, outer pipe shell 112 also has protuberance 113 and comes to engage and guided with syringe needle except having the guiding that is provided by groove shape opening 28 prevents that syringe needle from rotating when stretching out.Guide bar and the front end that passes conduit with the normal mode stretching, extension.The front end of conduit and outer pipe shell are preferably made by metal or a kind of plastic material hard, that sliding capability is good.

In order to move axially syringe needle 26, use operating mechanism 132 as shown in Figure 6 together with its extension 126.This operating mechanism 132 is equivalent to operating mechanism shown in Figure 3 basically.The rear end of multi-cavity flexible pipe 120 is connected on the static part 134, and syringe needle extension 126 is stretched over moving part 135 and is mounted to thereon and makes fluid or medicine be fed to syringe needle extension 126 from distributor chamber 139 under pressure.The operation of operating mechanism is as the description in conjunction with Fig. 3.This mechanism is shaped as and enables to operate with a hands.

The number of syringe needle can be even number or odd number, and syringe needle can be distributed on the conduit cross section equably or anisotropically.

Can also use for example two syringe needles, and guide wire 5 for example is eccentrically set in the third channel of multi-cavity flexible pipe.In this case, guide wire also can be prejudicially stretches out from the front end of conduit.

The conduit of the type of describing preferably has the diameter between 0.5mm to 5mm, and the length of conductor housing is between 1mm to 10mm.

Fig. 8 illustrates another embodiment of the present invention, and wherein, sacculus 211 is arranged on injection head 210 fronts.In the case, the inside of sacculus is passed in 215 stretching, extensions of guide wire, and is the same with so-called monorail conduit.The front end 214 of injection head is equivalent to the structure of Fig. 5 basically, and catheter proximal end 214 is connected on the multi-cavity flexible pipe 220 by outer pipe shell 212.Hollow pinhead 26 stretches by multi-cavity flexible pipe 220 from conductor housing 214 and arrives operating mechanism shown in Figure 9, and in this operating mechanism, syringe needle is connected on the operating mechanism by the following stated mode.

Be used for inner chamber 216 supplies of expansible fluid by multi-cavity flexible pipe 220, inner chamber 216 stretches as a passage and passes conductor housing 214 and terminate in the chamber that is used for dilatation balloon 211.

Figure 10 and 11 is two cross sections figure of conductor housing, and wherein Figure 10 illustrates a multi-cavity flexible pipe 220 that is surrounded by outer pipe shell 212, and in this multi-cavity flexible pipe, the channel arrangement triangularity of hollow pinhead 26 and extension 226 thereof is arranged.Line feeder 228 is arranged between the passage of syringe needle extension and is molded in the multi-cavity flexible pipe material, as shown in figure 11.These line feeders make conduit can not occur the side direction twist and warping within it when syringe needle is mobile.

Fig. 9 illustrates operating mechanism 232 and how to help that syringe needle and extension 226 thereof are moved through multi-cavity flexible pipe 220 slidably and come injectable drug.Similarly, this operating mechanism comprises a static part 234 and a moving part 235, and these two parts keep separating a distance mutually by a spring 240, on this position, in the hollow pinhead retraction conductor housing 214.The distance that syringe needle can stretch out from conductor housing limits by being fixed on the pin 230 on the static part 234 and being located at the groove 231 that moving part 235 is used to hold this pin.The displacement of the length decision syringe needle of groove 231.

Multi-cavity flexible pipe 220 is bonded in the front end of static part 234 and makes it to be firmly held in wherein.Correspondingly, one section 236 of the multi-cavity flexible pipe is fixedly mounted in the moving part 235, and the termination of syringe needle extension 226 is passed that flexible pipeline section 236 is stretched in the distributor chamber 238 and be bonding therewith to move with flexible pipeline section 236.When operating mechanism is pressed among the figure operation of direction shown in the arrow, make syringe needle follow conductor housing to move.

Inner chamber 216 is outwardly-bent and terminate in a fluid that is used for dilatation balloon by the adapter 245 of known manner by its supply in static part 234.The discharging of sacculus is also by realizing with a connector.

Moving part 235 comprises a corresponding adapter 246, and this adapter setting comes to be communicated with distributor chamber 238, and medicine is supplied by this adapter in common mode.

In order to help to understand, some accompanying drawings illustrate with magnification ratio, in the hope of being familiar with feature of the present invention better.

Claims

1. one kind is used for the fluid such as medicine is injected the endoceliac conduit (10) that enters such as vein or hollow organ, it is characterized in that containing one and have a conductor housing (14) that has longitudinal axis and can insert this endoceliac conduit shell (12) by an insertion passage, a guide wire (5) that is used to guide described conduit, also containing many distributes and can be arranged on syringe needle (26) in the conductor housing movably between retracted position and extended position round conductor housing (14) by a predetermined pattern, on retracted position, syringe needle is in the conductor housing, on extended position, the front end of syringe needle passes the opening that is formed on the conductor housing and stretches out from conductor housing, described syringe needle is contained in the multi-cavity flexible pipe (20) that is supported on longitudinal movement in the conduit, this conduit is provided with an operating mechanism (32) on its termination relative with conductor housing, this operating mechanism includes two relatively-movable parts (34 of separating setting, 35), the last described multi-cavity flexible pipe (20) that has a plurality of separate channels (24) of a part (34) that described conduit shell (12) is connected to this operating mechanism then is connected on another part (35) of this operating mechanism, described two parts keep separately by the bias force of a spring (40), these two parts are being resisted power that this spring applies when compressing this multi-cavity flexible pipe (20) will connect thereon syringe needle (26) and move to their extended position from their retracted position, described syringe needle be hollow to form the syringe needle passage and to be communicated with each separate channels in this multi-cavity flexible pipe, another part of described operating mechanism includes a distributor chamber (46), this distributor chamber is communicated with described each separate channels, and is connected to fluid or medicine are fed to syringe needle with the device in the wall that fluid or medicine injection is entered body cavity.

2. by the described conduit of claim 1, it is characterized in that described syringe needle (26) has the tubulose extension (126) that is placed in the conduit, described tubulose extension is connected to a fluid or medicine feeding mechanism so that medicine is imported in the syringe needle.

3. by the described conduit of claim 1, it is characterized in that described syringe needle (26) arranges round conductor housing (14) with 120 ° at even interval.

4. by the described conduit of claim 1, it is characterized in that described syringe needle (26) has the front end face (30) that is parallel to the conduit axis when it is in extended position.

5. by the described conduit of claim 1, it is characterized in that described syringe needle (26) has the front end face (30) of being arranged to be with respect to the conduit axis angle when it is in extended position.

6. by the described conduit of claim 1, it is characterized in that described syringe needle (26) has the pre-bending end, these pre-bending ends remain under stress in the conduit shell (12), and the opening that makes it to pass in the conductor housing when needle forward is moved goes out to excurvation.

7. by the described conduit of claim 6, it is characterized in that described conductor housing (14) comprises a syringe needle guiding device (36,38) that is used for that described syringe needle (26) remained on correct direction and guides the opening (28) that syringe needle passes this conductor housing.

8. by the described conduit of claim 1, the front that it is characterized in that having a sacculus (211) to be arranged on conductor housing (14) and be communicated with to charge and discharge fluid to sacculus with a passage (24) in multi-cavity flexible pipe (20).

9. by the described conduit of claim 1, it is characterized in that described guide wire (5) stretches to pass described multi-cavity flexible pipe and described conductor housing and guide this conduit with in conduit inserts body cavity the time.

10. one kind is used for the fluid such as medicine is injected the endoceliac conduit (210) that enters such as vein or hollow organ, it is characterized in that containing one and have a conductor housing (214) that can insert this endoceliac conduit shell (212) by an insertion passage, a guide wire (215) that is used to guide described conduit, also containing many distributes and can be arranged on syringe needle (26) in the conduit shell movably between retracted position and extended position round conductor housing by a predetermined pattern, on retracted position, syringe needle is in the conduit shell, on extended position, the front end of syringe needle stretches out from conduit shell and conductor housing, described syringe needle has the extension (226) that is movably received within the multi-cavity flexible pipe (220), this multi-cavity flexible pipe is arranged in this conduit shell and has a plurality of separate channels that are used to hold each discrete syringe needle extension, also contain on the end relative that is installed in this conduit and include two separated relatively-movable parts (234 with its conductor housing, 235) operating mechanism (232), the last described syringe needle extension (226) of a part (234) that described multi-cavity flexible pipe (220) is connected to this operating mechanism then is connected on another part (235) of this operating mechanism, described two parts keep separately by the bias force of a spring (240), described syringe needle extension is moved in the passage of described multi-cavity flexible pipe described syringe needle is moved to their protruding position from their retracted position when the power that these two parts are being resisted this spring is compressed, described syringe needle (26) and described syringe needle extension (226) are on this another part hollow and that be connected to this operating mechanism (235), this another part (235) includes a distributor chamber (238), this distributor chamber be communicated with described hollow pinhead extension and be connected to fluid or medicine be fed to described syringe needle extension with fluid or drug conveying to described syringe needle so that injection enters the device in the wall of described body cavity.

11. by the described conduit of claim 10, the front that it is characterized in that having a sacculus (211) to be arranged on conductor housing and with a channel connection in multi-cavity flexible pipe (220) to charge and discharge fluid to sacculus.

12. by the described conduit of claim 10, it is characterized in that described guide wire (215) stretches to pass described multi-cavity flexible pipe and described conduit and guide this conduit with in this conduit inserts body cavity the time.

13. by the described conduit of claim 10, the front that it is characterized in that having a sacculus (211) to be arranged on conductor housing and with the multi-cavity flexible pipe in a channel connection charging and discharging fluid to sacculus, described guide wire (215) stretches and passes this sacculus and guide this conduit with in conduit inserts body cavity the time.

14., it is characterized in that this guide wire (215) stretches to pass this conductor housing (214) and this multi-cavity flexible pipe (220) by the conduit that claim 13 is stated.

15. one kind is used for the fluid such as medicine is injected the endoceliac conduit (10) that enters such as vein or hollow organ, it is characterized in that containing one and have a conductor housing (14) that can insert this endoceliac conduit shell (12) by an insertion passage, a guide wire (5) that is used to guide described conduit, also containing many distributes and can be arranged on syringe needle (54) in the conductor housing movably between retracted position and extended position round conductor housing by a predetermined pattern, on retracted position, syringe needle is in the conductor housing, on extended position, the front end of syringe needle passes the opening that is formed on the conductor housing and stretches out from conductor housing, described syringe needle is installed on the interior flexible pipe (56), in this, be provided with a flexible pipe that adds (58) in the flexible pipe to constitute the passage of a sealing, also be provided with and be used for being supplied to this passage to enlarge with flexible pipe in will being somebody's turn to do pressure fluid and forcing the opening that flexible pipe moves syringe needle is passed conductor housing in this to move outwardly outwardly, described syringe needle is by being located at the supply of the passage in flexible pipe injecting fluid in this.

16., it is characterized in that described guide wire (5) stretches to pass this flexible pipe that adds and this conduit and guide this conduit with in this conduit inserts body cavity the time by the conduit that claim 15 is stated.