JP2002000610A - Catheter for removing foreign substances - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pair of balloons 11a and 11b which easily and accurately sandwitch foreign substances F that entered in the bronchus B for removing them without requiring the experienced techniques. SOLUTION: This catheter 10 for removing foreign substances is provided with a pair of tubes 12a and 12b which are penetrated through a bronchial mirror 14 whose tips are provided with the balloons 11a and 11b that inflate or shrink due to the inflow or the outflow of liquids in addition to the syringes 13a and 13b for inflating the balloons at hands. The balloon that jumps over the tube 12a and reaches the foreign substance F held by the inflated ballonn 11b at hand to be pulled out of the bronchus B together with the tubes, 12a, 12b and a broncial mirror 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catheter used for removing foreign matter that has entered a trachea (airway).

[0002]

2. Description of the Related Art Foreign matter that has accidentally entered the trachea (airway) is usually removed by a basket catheter. The basket catheter 1 is composed of a plurality of thin metal wires 2 so that the distal end can be opened and closed by a manual operation (FIGS. 1a and 1b). When removing the foreign matter F that has entered the bronchus B branched from the trachea T, the bronchoscope 3 is inserted into the bronchus B from the trachea T, and the position of the foreign matter F is confirmed by the bronchoscope 3. Next, the basket catheter 1 in a contracted state (FIG. 1 b) is inserted into the bronchoscope 3 so that the tip of the basket catheter 1 faces the vicinity of the foreign matter F (FIG. 1 c). 4 is assumed. After the foreign matter F is stored in the basket 4, the foreign matter F is gripped by the thin metal wire 2 by contracting the basket 4. By pulling out the basket catheter 1 in this state, the foreign matter F is removed from the bronchus B.

[0003]

When the foreign matter F is in the relatively large bronchus B, the foreign matter F can be easily removed by using the basket catheter 1. However, accommodating the foreign body F that has entered the peripheral airway in the basket 4 is a difficult task requiring highly skilled skills, and tends to be a long-term treatment. Further, since the metal wire 2 is deformed in the trachea (airway) to expand or contract the basket 4, it is inevitable that the metal wire 2 comes into contact with the inner wall of the organ, and the organ may be damaged in some cases. .

[0004]

SUMMARY OF THE INVENTION The present invention has been devised to solve such a problem. A pair of balloons which can be expanded by hand operation are provided at the distal end of a catheter, and foreign matter is gripped by the expanded balloon. Accordingly, an object of the present invention is to provide a catheter capable of minimizing organ damage as much as possible and easily removing foreign matter. In order to achieve the object, the foreign matter removal catheter of the present invention has a balloon that expands or contracts by the inflow or discharge of fluid at the distal end of each of a pair of tubes inserted through the bronchoscope, and a balloon expansion syringe at the proximal side. Is attached, and the foreign object is gripped between the distal balloon expanded over the foreign object that has entered the bronchus and the proximal balloon expanded nearer to the foreign object.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A catheter 1 for removing foreign matter according to the present invention.
0 is provided with a pair of balloons 11a and 11b at the tip as shown in FIG. 2, for example. Each balloon 11a, 1
Tubes 12a and 12b are connected to 1b, respectively.
The proximal ends of the tubes 12a, 12b are connected to respective balloon expansion syringes 13a, 13b. The balloons 11a and 11b preferably expand and contract in the radial direction of the tubes 12a and 12b, but preferably have directionality so as not to expand and contract in the longitudinal direction of the tubes 12a and 12b. The tubes 12a and 12b are made of a synthetic resin having a large deformation resistance at least in the vicinity of the distal end.
They are bound at appropriate places. Each balloon 11a, 11
By individually connecting b to the balloon expansion syringes 13a and 13b, the balloons 11a and 11b can be independently expanded and contracted (FIGS. 2a and 2b). The catheter itself with the balloon is disclosed in US Pat. No. 6,029,076.
As disclosed in the specification, the present invention facilitates foreign matter removal by providing a function of independently expanding or contracting the pair of balloons 11a and 11b.

[0006] Foreign matter removal using the foreign matter removal catheter 10 is performed as follows. After confirming the position of the foreign matter F entering the bronchus B with the bronchoscope 14, one of the tubes 12a is sent to the bronchus B via the bronchoscope 14 until the distal balloon 11a reaches a position over the foreign matter F ( Figure 3a). The other tube 12b
Is inserted through the bronchoscope 14 so that the proximal balloon 11b is positioned before the foreign substance F. Here, tube 1
Since the deformation resistance of the tip of 2a is large, the tube 12a easily gets over the foreign matter F.

After the distal balloon 11a has passed over the foreign matter F, the balloon dilatation syringe 13a (FIG. 2b) is compressed and fluid is sent to the distal balloon 11a.
Expand 1a (FIG. 3b). When the tube 12a is retracted with the distal balloon 11a expanded, foreign matter F
Is pushed by the expanded distal balloon 11a and moves in the bronchus B in the withdrawal direction. Prior to the movement of the foreign matter F,
It is preferable to slightly retract the distal balloon 11a and check whether the foreign matter F moves.

The foreign matter F comes into contact with the proximal balloon 11b when the moving distance reaches a certain length. The contact of the foreign matter F with the proximal balloon 11b is detected because the fluid in the proximal balloon 11b is pushed out of the tube 12b by the contact, flows into the balloon expansion syringe 13b, and shakes the cylinder of the balloon expansion syringe 13b. You. After the foreign matter F comes into contact with the proximal balloon 11b, a fluid is sent from the tube 12b to the proximal balloon 11b by operating the balloon expansion syringe 13b to expand the proximal balloon 11b. As a result, the foreign matter F is gripped between the expanded distal balloon 11a and the proximal balloon 11b (FIG. 3C). In this state, the balloon 11a,
The foreign body F is removed from the bronchi B by pulling out 11b together with the bronchoscope 14 (FIG. 3d).

Depending on the size of the foreign matter F in the bronchus B, the distal balloon 11a may move to the proximal balloon 11b.
It is necessary to change the distance L to the distance. In such a case, the vicinity of the distal end of the tube 12a is made of a material having relatively large deformation resistance. Therefore, by adjusting the length of the tube 12a protruding from the bronchoscope 14, the distance L corresponding to the size of the foreign matter F is adjusted. Can be set. As described above, when the foreign matter F is interposed between the distal balloon 11a and the proximal balloon 11b and removed from the bronchus B, the basket catheter 1
The foreign matter F is easily and reliably removed without requiring a skilled technique as shown in FIG. Moreover, unlike the conventional basket catheter 1 (FIG. 1) in which the basket 4 is expanded by the deformation of the thin metal wire 2, the one that comes into contact with the inner wall of the organ is the flexible balloons 11a and 11b, so that damage to the organ is extremely small. Become.

[0010]

As described above, the catheter for removing foreign matter according to the present invention is a system in which foreign matter that has entered the bronchi is removed from the bronchus by grasping it between the distal balloon and the proximal balloon. Unlike the basket catheter described above, a complicated and highly skilled technique for accommodating foreign matter in a basket is not required, and foreign matter can be easily and reliably removed. In addition, unlike the basket catheter, the expanded balloon comes into contact with the inner wall of the organ, so that damage to the organ is extremely reduced.

[Brief description of the drawings]

FIG. 1 shows a state in which a basket of a conventional basket catheter is expanded (a), contracted (b), and usage form of the basket catheter (c)

FIG. 2 shows a steady state (a), a state in which a distal balloon is expanded (b), and a state in which both balloons are expanded (c) of a catheter for removing foreign matter according to the present invention.

FIG. 3 is an explanatory view of an operation of removing foreign matter from the bronchi using the foreign matter removal catheter according to the present invention.

[Explanation of symbols]

10: catheter for removing foreign substances 11a, 11b: balloon 12a, 12b: tube 13a, 13b:
Balloon expansion syringe 14: Bronchoscope T: Trachea B: Bronchi F: Foreign body L: Distance

Claims (1)

[Claims] 1. A balloon which expands or contracts by inflow or discharge of a fluid at the distal end of each of a pair of tubes inserted through a bronchoscope, and a balloon expandable syringe attached to a proximal side of the tube so that foreign matter that has entered the bronchus can be overcome. A foreign matter removing catheter characterized in that a foreign matter is gripped between an expanded distal balloon and a proximal balloon expanded closer to the foreign matter than the foreign matter.