KR20160021959A - Multi-Balloon catheter and Catheter device having the same - Google Patents

Abstract

The present invention relates to a multi-balloon catheter and a catheter device having the same. The multi-balloon catheter comprises: a suppt tube having a liquid medicine passage and an inflation fluid passage; a steering tube integrated with an extension end of the support tube, and having a connection passage, an induction passage, and two or more lateral side holes arranged on the lateral side of the induction passage; a tip fixed to the front end part of the steering tube; a balloon sheet tightly fixed to the outer circumference of the steering tube, and being inflated in the radial direction of the steering tube by the pressure of inflation fluid injected through the lateral holes; and three or more shrink rings having a ring shape to tightly and partially fix the balloon sheet to the outer circumference of the steering tube. The multi-balloon catheter and the catheter device having the same, according to the present invention, have a multi-balloon unit with a plurality of balloons so a narrowed stenosis part can be spread entirely and simultaneously, even if the stenosis areas are relatively large or the shape of the inner side of the stenosis part is irregular, thereby allowing a surgical procedure to be performed quickly to enhance the effect of surgical procedures. Surgical procedures can be performed in a stable manner, since the balloons do not slide down even if tissues of the stenosis part are slippery, and the balloons are in contact with the stenosis part simultaneously.

Description

[0001] The present invention relates to a multi-balloon catheter and a catheter device having the same,

The present invention relates to a multi-balloon catheter and a catheter device having the same.

Nerve fusion surgery, which is performed mainly in neurosurgery, is to secure a hole through the body at the tail bone of the vertebra, inserting the catheter into the hole, injecting the drug solution through the catheter, Is a procedure that nec- tures the nervous tissue of the central nervous system and nerve branches or removes inflammatory substances.

In addition, the so-called tail bone endoscopic therapy using a video guide catheter is a treatment method in which an ultrasound endoscope is passed through a video guide catheter introduced into the body to visually confirm a body lesion site through an endoscope, The laser beam can be directly irradiated to the lesion by inserting the laser treatment device, so that a precise treatment effect can be obtained. This is known to be a suitable procedure for spinal stenosis, disc rupture, or nerve fusion with small effect.

On the other hand, balloon dilatation may be applied as another non-surgical method of treating diseases such as disc rupture or spinal stenosis. The balloon dilation technique is a procedure that alleviates the pressure applied to the nerve and blood vessels by inflating the balloon to expand the nerve passage after inserting a balloon catheter into the narrowed passage of the spinal nerve.

For such balloon expanding, a medical device for dissociation of epidural aneurysm and mitigation of the stenosis of the spinal canal has been proposed in Korean Patent No. 10-1334500.

The medical instrument includes a handle, an insertion tube extending from the handle and having one through hole formed in the longitudinal direction, a dial for adjusting the direction of the insertion tube, and a balloon A fluid bag accommodating a fluid to inflate the balloon, and a button for pressing the fluid bag to supply fluid to the balloon.

However, the above-described medical instrument has a disadvantage that once the function of the balloon portion is limited. For example, since the fluid for inflating the inflatable portion is supplied from the fluid bag, the inflated amount of the inflated portion can not be more than the volume of the fluid contained in the fluid bag. In order to increase the amount of swelling, the fluid bag must be enlarged, which will increase the weight of the instrument.

Further, since only one balloon portion is formed on the end side of the insertion tube, it is difficult to stably support the balloon portion at the corresponding point when the narrowed area is wide or the inner shape of the narrowed region is irregular and slippery. The balloon may slip out of the stenosis site at the same time as the balloon swells.

The present invention has been made in order to solve the above problems and has a multi-balloon portion composed of a plurality of balloons, so that even if the narrowing region is wide or the inner shape of the narrowing region is irregular, the narrowed narrowing region can be spread at the same time, And a catheter device having the multi-balloon catheter.

It is another object of the present invention to provide a multi-balloon catheter and a catheter device having the same, which can stably perform the balloon because the multiple balloons contact the stenosed region at the same time, so that even if the tissue at the stenosed region is slippery, the balloon slips and does not fall out.

In order to achieve the above object, the present invention provides a multi-balloon catheter comprising: a support tube extending in a longitudinal direction so as to be inserted into a body, the support tube having a chemical solution passage and an expansion fluid passage extending in parallel to each other; A connection passage for passing a chemical solution supplied through the chemical solution passage and a guide passage for receiving an inflation fluid passed from the expansion fluid passage; A steering tube having two or more side holes arranged in the longitudinal direction to open the induction passage to the outside in the lateral direction; A tip fixed to the distal end of the steering tube and having a discharge port for passing a chemical solution passing through the connection passage; A pair of guide rods extending rearwardly of the support tube through the interior of the steering tube and the support tube with the tip end thereof fixed to the inside of the tip to pull the tip when the rear tube is tensioned to bend the steering tube A steering wire; A balloon seat which is tightly fixed to an outer circumferential surface of the steering tube and is inflatable in a radial direction of the steering tube by a pressure of inflation fluid injected through the side hole; The balloon sheet being partially tightly fixed to the outer circumferential surface of the steering tube so as to be thermally contracted in a state of being spaced apart from each other with the side holes interposed therebetween, And at least three shrink rings for allowing more than one balloon to be formed.

The support tube is made of a synthetic resin and has flexibility, the chemical solution passage is formed at the center shaft portion of the support tube, the expansion fluid passage is formed to be spaced apart from the side of the chemical solution passage, And a preliminary passage is formed in parallel on the opposite side of the expansion fluid passage.

Further, the steering tube includes: The support tube has a relatively greater flexibility than the support tube, and the portion of the guide passage that meets the tip is blocked and blocked by the tip.

In addition, the connection passage is located at the center shaft portion of the steering tube, and the auxiliary passage is formed parallel to the connection passage at the opposite side of the guide passage.

Further, two shrink rings of the plurality of shrink rings are respectively filled in the connecting portion of the tip and the steering tube and the connecting portion of the steering tube and the support tube, and the remaining shrink ring is located between the two shrink rings .

According to another aspect of the present invention, there is provided a catheter apparatus comprising: a flexible tube extending in a longitudinal direction so as to be inserted into a body, the tube including a support tube having a chemical solution passage and an expansion fluid passage extending in parallel to each other, ; A connection passage for passing a chemical solution supplied through the chemical solution passage and a guide passage for receiving an inflation fluid passed from the expansion fluid passage; A steering tube having two or more side holes arranged in the longitudinal direction to open the induction passage to the outside in the lateral direction; A tip fixed to the distal end of the steering tube and having a discharge port for passing a chemical solution passing through the connection passage; A pair of guide rods extending rearwardly of the support tube through the interior of the steering tube and the support tube with the tip end thereof fixed to the inside of the tip to pull the tip when the rear tube is tensioned to bend the steering tube A steering wire; A balloon seat which is tightly fixed to an outer circumferential surface of the steering tube and is inflatable in a radial direction of the steering tube by a pressure of inflation fluid injected through the side hole; The balloon sheet being partially tightly fixed to the outer circumferential surface of the steering tube so as to be thermally contracted in a state of being spaced apart from each other with the side holes interposed therebetween, A multi-balloon catheter comprising three or more shrink rings to allow more than one balloon to be formed; A connecting manifold for receiving and fixing the rear end portion of the support tube and passing the steering wire backward; A case for fixing and connecting the connecting manifold to provide an internal space; A steering unit provided in the case and coupled to a rear end of a steering wire extending rearward of the manifold, for bending the multi-balloon catheter by pulling a steering wire when operated by a user; Fixing means disposed corresponding to the steering portion and fixing the steering portion if necessary; A first connection tube extending from the inside of the connecting manifold to the outside of the case in a state of communicating with the chemical solution passage of the support tube and guiding the chemical solution supplied from the outside to the chemical solution passage; And a second connection tube extending from the inside of the connecting manifold to the outside of the case in a state of communicating with the inflation fluid passageway of the support tube and guiding the fluid supplied from the outside to the inflating fluid passageway.

The support tube is made of synthetic resin and is flexible, the chemical solution passage is formed at the center shaft portion of the support tube, the expansion fluid passage is formed to be spaced apart from the side of the chemical solution passage, And a preliminary passage is formed in parallel on the opposite side of the expansion fluid passage.

Further, the steering tube includes: The support tube has a relatively greater flexibility than the support tube, and the portion of the guide passage that meets the tip is blocked and blocked by the tip.

Further, the connection passage is located at the center shaft portion of the steering tube, and the auxiliary passage is formed parallel to the connection passage and on the opposite side of the guide passage.

In addition, the case may be constituted of an upper case and a lower case which mutually combine to provide the internal space, and the steering part comprises: And an operating dial which is rotatably mounted on the upper case and is movable up and down, and a part of which is exposed to the side of the upper case and is operated by a user, the fixing means comprising: And a dial fixing part for fixing the operation dial when the operation dial is lowered while being fixed to the lower case, and a locking button for lowering and fixing the operation dial to the dial fixing part is provided outside the upper case .

Since the multi-balloon catheter of the present invention having the above-described multi-balloon catheter includes a plurality of balloons, the narrowed stenosis area can be opened at the same time even if the stenosed area is wide or the inner shape of the stenosed area is irregular. So that the effect of the treatment can be increased.

In addition, since a plurality of balloons are simultaneously in contact with the stenosis site, even if the tissue at the stenosis site is slippery, the balloon slips and is not likely to fall off, thereby enabling stable operation.

1 is a partially enlarged cutaway perspective view of a catheter device in accordance with an embodiment of the present invention.
FIG. 2 is a cross-sectional view for explaining the internal structure of the multi-balloon catheter shown in FIG. 1; FIG.
3 is a sectional view taken along the line III-III in Fig.
4 is a sectional view taken along the line IV-IV in FIG.
5 is a sectional view taken along the line V-V in Fig.
FIG. 6 is an exploded perspective view of the catheter device shown in FIG. 1. FIG.
7 is a cross-sectional view of the connecting manifold shown in FIG.
FIG. 8 is a view for explaining the operation of the catheter apparatus shown in FIG. 1. FIG.
FIG. 9 is a perspective view showing a state in which the multi-balloon is inflated in the catheter apparatus shown in FIG. 1. FIG.
FIGS. 10A and 10B are diagrams for explaining the working principle of the multi-balloon shown in FIG.

Hereinafter, one embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a partially enlarged cutaway perspective view of a catheter device in accordance with an embodiment of the present invention.

Referring to the drawings, a catheter device 11 according to the present embodiment includes a multi-balloon catheter 31 extending longitudinally and inserted into a body and having a multi-balloon portion 35 at its distal end, An operation unit 13 connected to a rear end of the manipulation unit 13 and gripped by an operator and a drug injection tube 21 and an inflation fluid injection tube 23 coupled to the manipulation unit 13.

The multi-balloon catheter 31 is a flexible member which is elongated in the longitudinal direction so as to be inserted into the body through the caudal bone and is thinly processed. The multi-balloon catheter 31 is supported on the case 15 with its rear end do.

Particularly, the multi-balloon catheter 31 has two multi-balloons 53 as shown in Fig. The formation of a plurality of the multi-balloons 53 in this way provides not only a simple change in the number but also a meaningful effect that can improve problems and difficulties in previous procedures. This will be described later.

In the present embodiment, two multi-balloons 53 are applied, but the number of multi-balloons 53 can be increased as much as possible. Furthermore, it is needless to say that the interval between the multi-balloons 53 can be changed according to the design.

2, the structure of the multi-balloon catheter 31 will be described in detail.

As shown in the drawings, the multi-balloon catheter 31 according to the present embodiment includes a flexible support tube 33 which is sufficiently extended in the lengthwise direction and a flexible tube 33 which is integrally coupled to the distal end of the support tube 33, A balloon seat 37 which closely contacts the outer circumferential surface of the steering tube 35a and surrounds the steering tube 35a and a balloon seat 37 which surrounds the balloon seat 37 And a tip 43 fixed to the tip of the steering tube 35a. The shrinking ring 39 is fixed to the steering tube 35a by tightening the guide tube 35a.

7, the support tube 33 is a synthetic resin member which is inserted and fixed in the connecting manifold 25 and has a chemical liquid passage 33a, an expansion fluid passage 33b, And has a spare passage 33c and a pair of wire holes (33e in Fig. 5).

The drug solution passage 33a passes the drug supplied through the drug injection tube 21 to the multi-balloon unit 35. [ The drug may be a therapeutic drug or saline.

The expansion fluid passage 33b and the preliminary passage 33c extend through the chemical solution passage 33a and extend in parallel with the chemical solution passage 33a. The gap between the expansion fluid passage 33b and the preliminary passage 33c with respect to the chemical solution passage 33a is the same.

The inflation fluid passage 33b serves to pass inflation fluid injected through the inflation fluid infusion pipe 23, that is, air or saline, to the induction passage 35d of the multi-balloon unit 35. [

The reserve passage 33c is not normally used as a passage of the same size as the expansion fluid passage 33b. The preliminary passage 33c can be used as a passageway when necessary, but the ultimate role is to balance the support tube 33. That is, it is formed to match the secondary ductility moment (in the direction connecting the expansion fluid passage and the preliminary passage) with respect to the center axis of the chemical liquid passage 33a. This is because the bending curvature to the right and left is constant when the secondary bending moments are equal.

The wire hole 33e is also symmetrical about the chemical liquid passage 33a. An imaginary line connecting the wire hole 33e and an imaginary straight line connecting the expansion fluid passage 33b and the reserve passage 33c cross at right angles at the center of the chemical liquid passage 33a.

On the other hand, the steering tube 35a is a linear portion having a relatively large flexibility in comparison with the support tube 33. [ That is, the support tube 33.

The cross-sectional shape of the steering tube 35a is the same as that of the support tube 33, but a side hole 35b is further formed in the side portion. That is, the steering tube 35a has a connecting passage 35c at a central shaft portion, and an induction passage 35d and an auxiliary passage 35e are provided below the connecting passage 35c. And has wire passages (35f in Fig. 4) on the right and left sides of the connection passage 35c.

The connection passage 35c is a through passage that meets the chemical solution passage 33a. Naturally takes the chemical liquid having the same inner diameter as the chemical liquid path 33a and passed the chemical liquid path 33a and transfers it to the tip 43. [

Similarly, the induction passage 35d receives the inflation fluid in correspondence with the inflation fluid passage 33b, and the auxiliary passage 35e corresponds to the preparatory passage 33c. The function of the auxiliary passage 35e is the same as that of the auxiliary passage 33c.

The wire passage 35f formed on both sides of the connection passage 35c is in line with the wire hole 33e of the support tube 33 and allows the steering wire 45 to pass straight through.

In particular, the induction passage 35d is open to the outside through a plurality of side holes 35b. The side hole 35b is a through hole spaced apart in the longitudinal direction of the steering tube 35a and laterally opens the induction passage 35d so that the inflation fluid is directed toward the balloon seat 37 outside the steering tube 35a .

It is a matter of course that the number of the side holes 35b may vary depending on the size and specification of the multi-balloon catheter.

The tip 43 is a part made of stainless steel or synthetic resin, and is fixed to the tip end of the steering tube 35a. The discharge port 43a formed in the central shaft portion of the tip 43 is a hole for passing the chemical liquid that has passed through the connection passage 35c and discharging it forward.

Particularly, the tip 43 also functions to block the induction passage 35d and the auxiliary passage 35e. That is, the inflating fluid entering the induction passage 35d is prevented from further moving in the longitudinal direction. By this action, the inflation fluid supplied to the induction passage 35d can escape only to the side hole 35b.

The outer circumferential surface of the steering tube 35a is wrapped with a balloon sheet 37. The balloon sheet 37 is made of medical silicone, for example, expanded by an external force and transformed into a multi-balloon 53. [

In addition, the outer surface of the balloon sheet 37 is filled with three shrinkage rings 39. The shrinking ring 39 is a member in the form of a ring and contracts by heat to tighten and fix the balloon sheet 37. That is, when heat is applied in a state in which the shrinking ring 39 before shrinking is disposed at an appropriate position, the shrinking ring 39 is contracted to tighten the balloon sheet 37.

The shrinking ring 39 is filled at both ends of the balloon seat 37 one by one and the other is located at the longitudinal center of the steering tube 35. The reason why the shrinking ring 39 is disposed in this manner is that there are two side holes 35b. It goes without saying that the overall position of the shrinking ring 39 also changes if the number of the side holes 35b is different (on the assumption that the shrinking ring 39 is disposed on the opposite side with one side hole 35b in between).

In addition, the interval of each shrink ring 39 with respect to the side hole 35b may also be varied as required. It is natural that the size of the multi-balloon becomes larger as the distance of the shrink ring 39 from the side hole 35b is larger.

The two steering wires 45 form a pair and are located on opposite sides of the center axis of the multi-balloon catheter 31, and are spaced apart from the center axis by a certain distance.

The tip end of the steering wire 45 is fixedly inserted into the tip 43 and extends rearward through the interior of the steering tube 35a and the support tube 33, And is connected to the pulling protrusions 19a and 19b after being passed through the matfold 25.

3 is a cross-sectional view taken along line III-III in FIG. 2, and FIG. 4 is a cross-sectional view taken along a line IV-IV in FIG. 5 is a sectional view taken along the line V-V in Fig.

Referring to FIG. 3, a discharge port 43a is formed at the center shaft of the tip 43, and wire fixing ports 43b are provided on both sides of the discharge port 43a. It is noted that the steering wire 45 is fixedly inserted into the wire fixing hole 43b.

4 shows the cross-sectional structure of the multi-balloon portion 35. As shown in Fig. As shown in the drawing, the multi-balloon portion 35 includes a steering tube 35a, a balloon sheet 37 that is in close contact with the outer circumferential surface of the steering tube 35a, and a shrinking portion And a ring 39.

A connecting passage 35c is formed at the central shaft portion of the steering tube 35a, and a wire passage 35f is located at the right and left. A steering wire 45 passes through the wire passage 35f.

And the induction passage 35d provided at the lower portion of the connection passage 35c is opened to the outside through the side hole 35b. The inflation fluid discharged through the side hole 35b is introduced between the outer circumferential surface of the steering tube 35a and the balloon seat 37 and inflates the balloon seat 37. [

In addition, the sectional shape of the support tube 33 can be seen through FIG. A chemical solution passage 33a is located at the central shaft portion of the support tube 33. A wire hole 33e is formed on the left and right sides of the chemical solution passage 33a and an expansion fluid passage 33b and a preliminary passage 33c.

6 is an exploded perspective view of the catheter device 11 shown in Fig.

As shown, the catheter apparatus 11 according to the present embodiment includes an upper case 15a and a lower case 15b which are combined with each other to constitute a case 15, A dial fixing ring 15e for fixing the operation dial 19 when necessary, a connecting manifold 25 fixed to the front end of the case 15 and fixed to the front end of the case 15, A drug infusion tube 21 and an inflation fluid infusion tube 23 which are fixed to the rear end of the case 15; And first and second connection tubes 47 and 49 for connecting the tube 21 and the expansion fluid injection tube 23 with the connecting manifold 25.

In addition, lateral side openings 15c are formed on both side portions in the width direction of the upper case 15a and the lower case 15b. The side opening 15c provides a square hole at both sides of the case 15 to expose a part of the operating dial 19 to the outside of the case 15. [ Therefore, the practitioner can turn the operation dial projected to the outside of the case 15 from left to right in the direction of arrow a in Fig.

In addition, a through hole 15d is formed in a central upper portion of the upper case 15a. The through hole 15d is a hole through which the insertion portion 17a of the locking button 17 is passed. The insertion portion 17a pushes down the operation dial 19 when the locking button 17 is pressed with the insertion portion 17a of the operation dial 19 fitted in the button fixing hole 19f of the operation dial 19, And fixed to the stationary ring 15e.

The dial retaining ring 15e is integrally formed on the bottom surface of the lower case 15b and has a support tooth 15g on the outer circumferential surface thereof. The supporting tooth portion 15g is engaged with the fixed tooth portion 19e of the operating dial 19 to temporarily fix the operating dial 19 when the operating dial 19 is lowered. That is, the operation dial 19 is prevented from rotating in the direction of the arrow a.

In addition, a hollow lower support shaft 15f, which is hollow, is positioned at the center of the dial retaining ring 15e. The lower support shaft 15f serves to receive the upper support shaft 19c of the operation dial 19 and to support the upper support shaft 19c in an axially rotatable manner.

On the other hand, the operation dial 19 is a hollow cylindrical member which is opened downward and has a fixed toothed portion 19e on its inner circumferential surface. The fixed toothed portion 19e is a portion engaged with the support tooth portion 15g when the operation dial 19 is lowered. As a result, if the operating dial 19 is lowered toward the lower case 15b, the operating dial 19 can not be rotated and locked. To rotate the operating dial 19 again, it must be lifted up and removed from the dial holding ring 15e.

Traction projections 19a and 19b are provided on both sides of the bottom of the operation dial 19. [ The towing projections 19a and 19b serve to pull the rear end of the steering wire 45 as shown in FIG.

A holding groove 15h is formed at the tip of the case 15. The holding groove 15h serves to fix and support the connecting manifold 25.

Similarly, a pair of holding grooves 15h are formed at the rear end of the case 15, and the holding grooves 15h fix the drug injection tube 21 and the inflation fluid injection tube 23 by fixing them.

The connecting manifold 25 serves to connect the first and second connection tubes 47 and 49 to the multi-balloon catheter 31. The first and second connection tubes 47 and 49 connect the drug injection tube 21 and the expansion fluid injection tube 23 to the connecting manifold 25.

As shown in FIG. 7, two tube insertion openings 25a and 25b are formed in the connecting manifold 25. A first connection tube 47 is inserted into one of the two tube insertion openings 25a and 25b and a second connection tube 49 is inserted into the other tube insertion opening 25b.

7 is a cross-sectional view of the connecting manifold 25 shown in Fig.

As shown in the drawing, two tube insertion ports 25a and 25b are formed in the connecting manifold 25, and a support tube 33 is positioned at an end of the tube insertion ports 25a and 25b. That is, the first and second connection tubes 47 and 49 are inserted and fixed to the tube insertion ports 25a and 25b opened to the left side in the drawing, and the support tube 33 is fixedly fixed to the right side. 7, the steering wire 45 is omitted.

Figs. 8 and 9 are views for explaining the operation of the catheter apparatus 11 shown in Fig. 1. Fig.

First, as shown in the drawing, the multi-balloon catheter 31 in a straight line state is inserted into the body. While the multi-balloon catheter 31 reaches the target point in the body, the tip of the multi-balloon catheter 31 is bent through the manipulation dial 19 to the right and left to follow the correct path. At this time, the multi-balloon is not inflated.

For example, in order to enter the left side from the branch road, the operating dial 19 is rotated in the direction of the arrow a to stretch one steering airair 45. When the steering wire 45 is pulled, the tip tip 43 of the multi-balloon catheter 31 is bent in the direction of the arrow z. When the operating dial 19 is rotated in the opposite direction, it is a matter of course that the tip 43 is bent in the opposite direction.

When the multi-balloon unit 35 reaches the target point through the above process, a syringe (not shown) is connected to the end of the drug injection tube 21 and the drug is injected. The drug injected into the drug infusion tube 21 flows through the first connection tube 47 and the connecting manifold 25 into the chemical solution passage 33a and the connection passage 35c of the multi- (43a) in front of the tip (43).

On the other hand, in order to operate the multi-balloon unit 35, a syringe is connected to the end of the inflation fluid injection pipe 23, and saline solution or air for balloon inflation is press-fitted. Whether to use saline or air is determined by circumstances.

Anyway, the inflation fluid (saline or air) passes through the second connection tube 49 and the connecting manifold 25 and flows into the inflation fluid passageway 33b of the multi-balloon catheter 31. The inflating fluid entering the inflating fluid passage 33b enters the induction passage 35d and is simultaneously discharged through the side holes 35b.

The pressurized fluid discharged through the side hole (35b) expands the balloon sheet (37) to form the multi-balloon (53). The multi-balloon 53 becomes larger and larger as the inflation fluid is continuously pressurized, and enlarges the adhesion or stenosis area.

FIGS. 10A and 10B are diagrams for explaining the working principle of the multi-balloon shown in FIG.

FIG. 10A is a view showing the operation of a general balloon catheter, and FIG. 10B is a view showing the operation of the multi-balloon unit 35 according to the present embodiment.

In the conventional balloon catheter shown in Fig. 10A, only one single balloon 51 was applied. The balloon 51 expands in a state in which the balloon 51 enters the narrowed region A and widens the narrowed region. Since only one balloon 51 is applied, the balloon 51 often slips out of the narrowed region during operation. do. Particularly, as the surface texture of the stenotic region is slippery or the contact area between the balloon and the tissue is narrowed, the balloon 51 can slide in the direction of the arrow p. These problems are closely related to the effects of surgery.

In contrast, since the multi-balloon catheter 31 according to the present embodiment is composed of a plurality of multi-balloons 53, there is no fear of slipping during operation. As shown in FIG. 10B, since the multiple balloons 53 expand and support the stenosis site together, the stenosis site can be opened without slipping even if the tissue is slippery.

 While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

11: catheter device 13: operating part 15: case
15a: upper case 15b: lower case 15c: side opening
15d: through hole 15e: dial fixing ring 15f:
15g: Support tooth portion 15h: Holding groove 17: Locking button
17a: Insertion part 19: Operation dial 19a, 19b: Traction projection
19c: upper support shaft 19e: fixed toothed portion 19f: button fastener
21: drug injection tube 23: inflation fluid injection tube 25: connecting manifold
25a, 25b: tube insertion port 31: multi-balloon catheter 33: support tube
33a: chemical solution passage 33b: expansion fluid passage 33c:
33e: wire hole 35: multi-balloon portion 35a: steering tube
35b: side hole 35c: connection passage 35d: guide passage
35e: auxiliary passage 35f: wire passage 37: inflatable seat
39: shrink ring 43: tip 43a: outlet
43b: wire fixing port 45: steering wire 47: first connecting tube
49: second connection tube 51: balloon 53: multi-balloon

Claims (10)

A flexible tube extending in the longitudinal direction so as to be inserted into the body, comprising: a support tube having a chemical solution passage and an expansion fluid passage extending in parallel to each other and passing through the support tube;
A connection passage for passing a chemical solution supplied through the chemical solution passage and a guide passage for receiving an inflation fluid passed from the expansion fluid passage; A steering tube having two or more side holes arranged in the longitudinal direction to open the induction passage to the outside in the lateral direction;
A tip fixed to the distal end of the steering tube and having a discharge port for passing a chemical solution passing through the connection passage;
A pair of guide rods extending rearwardly of the support tube through the interior of the steering tube and the support tube with the tip end thereof fixed to the inside of the tip to pull the tip when the rear tube is tensioned to bend the steering tube A steering wire;
A balloon seat which is tightly fixed to an outer circumferential surface of the steering tube and is inflatable in a radial direction of the steering tube by a pressure of inflation fluid injected through the side hole;
The balloon sheet being partially tightly fixed to the outer circumferential surface of the steering tube so as to be thermally contracted in a state of being spaced apart from each other with the side holes interposed therebetween, Lt; RTI ID = 0.0 > 3 < / RTI > or more balloons. The method according to claim 1,
The support tube is made of synthetic resin and has flexibility,
The chemical liquid passage is formed in the central shaft portion of the support tube, and the expansion fluid passage is formed to be spaced apart from the side of the chemical liquid passage, and a preparatory passage is further formed in the center of the chemical liquid passage and on the opposite side of the expansion fluid passage A multi-balloon catheter featuring. 3. The method of claim 2,
The steering tube comprising:
Wherein the portion of the guide channel that is relatively more flexible than the support tube and that meets the tip of the guide channel is obstructed and blocked by the tip. The method of claim 3,
Wherein the connecting passage is located at the center shaft portion of the steering tube, and the auxiliary passage is formed parallel to the connecting passage and on the opposite side of the guide passage. The method according to claim 1,
Wherein the two shrink rings of the plurality of shrink rings,
A connection portion between the tip and the steering tube, and a connection portion between the steering tube and the support tube,
And the remaining shrink ring is located between the two shrink rings. A flexible tube extending in the longitudinal direction so as to be inserted into the body, comprising: a support tube having a chemical solution passage and an expansion fluid passage extending in parallel to each other and passing through the support tube; A connection passage for passing a chemical solution supplied through the chemical solution passage and a guide passage for receiving an inflation fluid passed from the expansion fluid passage; A steering tube having two or more side holes arranged in the longitudinal direction to open the induction passage to the outside in the lateral direction; A tip fixed to the distal end of the steering tube and having a discharge port for passing a chemical solution passing through the connection passage; A pair of guide rods extending rearwardly of the support tube through the interior of the steering tube and the support tube with the tip end thereof fixed to the inside of the tip to pull the tip when the rear tube is tensioned to bend the steering tube A steering wire; A balloon seat which is tightly fixed to an outer circumferential surface of the steering tube and is inflatable in a radial direction of the steering tube by a pressure of inflation fluid injected through the side hole; The balloon sheet being partially tightly fixed to the outer circumferential surface of the steering tube so as to be thermally contracted in a state of being spaced apart from each other with the side holes interposed therebetween, A multi-balloon catheter comprising three or more shrink rings to allow more than one balloon to be formed;
A connecting manifold for receiving and fixing the rear end portion of the support tube and passing the steering wire backward;
A case for fixing and connecting the connecting manifold to provide an internal space;
A steering unit provided in the case and coupled to a rear end of a steering wire extending rearward of the manifold, for bending the multi-balloon catheter by pulling a steering wire when operated by a user;
Fixing means disposed corresponding to the steering portion and fixing the steering portion if necessary;
A first connection tube extending from the inside of the connecting manifold to the outside of the case in a state of communicating with the chemical solution passage of the support tube and guiding the chemical solution supplied from the outside to the chemical solution passage;
And a second connection tube extending from the inside of the connecting manifold to the outside of the case and communicating with the inflation fluid passageway of the support tube and guiding the fluid supplied from the outside to the inflation fluid passageway. Device. The method according to claim 6,
The support tube is made of synthetic resin and has flexibility,
The chemical liquid passage is formed in the central shaft portion of the support tube, and the expansion fluid passage is formed to be spaced apart from the side of the chemical liquid passage, and a preparatory passage is further formed in the center of the chemical liquid passage and on the opposite side of the expansion fluid passage Gt; catheter device. 8. The method of claim 7,
The steering tube comprising:
Wherein the support tube has a relatively greater flexibility than the support tube and the portion of the guide passage that meets the tip is blocked and blocked by the tip. 9. The method of claim 8,
Wherein the connecting passage is located at the central axis of the steering tube and a further auxiliary passage is formed parallel to the connecting passage and on the opposite side of the guide passage. The method according to claim 6,
In this case,
And an upper case and a lower case which are mutually coupled to provide the internal space,
The steering unit includes:
And an operating dial which is rotatably mounted on the upper case and is movable up and down and a part thereof is exposed to the side of the upper case and is operated by a user,
The fixing means comprising:
And a dial fixing part for fixing the operation dial when the operation dial is lowered while being fixed to the lower case,
And a locking button for lowering and fixing the operation dial to the dial fixing unit is provided outside the upper case.

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