JP3759861B2 - Foreign body removal catheter - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a catheter used for removing foreign substances that have entered a trachea (airway).
[0002]
[Prior art]
Foreign matter that has entered the trachea (airway) by mistake is usually removed by a basket catheter. The basket catheter 1 is composed of a plurality of fine metal wires 2 so that the tip can be opened and closed by hand operation (FIGS. 1a and 1b).
When removing the foreign substance 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 substance F is confirmed by the bronchoscope 3. Next, the basket catheter 1 in a contracted state (FIG. 1b) is inserted through the bronchoscope 3, the tip of the basket catheter 1 is brought near the foreign object F (FIG. 1c), and the tip of the metal thin wire 2 is expanded by hand operation to expand the basket. 4. After the foreign matter F is accommodated in the basket 4, the foreign matter F is gripped by the fine metal wires 2 by shrinking the basket 4. By pulling out the basket catheter 1 in this state, the foreign matter F is removed from the bronchi B.
[0003]
[Problems to be solved by the invention]
In a state where the foreign matter F is in the relatively large bronchus B, the foreign matter F can be easily removed using the basket catheter 1. However, accommodating the foreign substance F that has entered the peripheral airways in the basket 4 is a difficult task that requires highly skilled skills and tends to be a long-term treatment. Further, since the metal thin wire 2 is deformed in the trachea (airway) and the basket 4 is expanded or contracted, it is inevitable that the metal thin wire 2 comes into contact with the inner wall of the organ, and sometimes the organ may be damaged. .
[0004]
[Means for Solving the Problems]
The present invention has been devised to solve such problems, and a pair of balloons that can be expanded by hand operation are provided at the distal end of the catheter, and organs can be damaged by grasping foreign matter with the expanded balloons. An object of the present invention is to provide a catheter that can be reduced as much as possible and easily remove foreign substances.
In order to achieve the object, the catheter for removing foreign matter of the present invention includes a pair of tubes inserted through a bronchoscope , a balloon attached to the distal end side of each tube, and expanded or contracted by inflow or discharge of fluid, A balloon expansion syringe that is attached to the proximal side of each tube and that allows fluid to flow into or out of each balloon and that expands over the foreign body that has entered the bronchus, and is expanded on the proximal side from the foreign body A foreign object is grasped and removed from the side balloon .
[0005]
Embodiment
The foreign substance removal catheter 10 according to the present invention is provided with a pair of balloons 11a and 11b at the tip as shown in FIG. 2, for example. Tubes 12a and 12b are connected to the balloons 11a and 11b, respectively, and the base ends of the tubes 12a and 12b are connected to the balloon expansion syringes 13a and 13b. The balloons 11a and 11b are preferably expanded and contracted in the radial direction of the tubes 12a and 12b, but have a direction 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 tip, and are bound at an appropriate location.
By individually connecting the balloons 11a and 11b to the balloon expansion syringes 13a and 13b, the balloons 11a and 11b can be expanded and contracted independently (FIGS. 2a and 2b). The catheter itself provided with the balloon is also disclosed in US Pat. No. 6,029,076, but in the present invention, foreign substances can be removed by providing a function of independently expanding or contracting the pair of balloons 11a and 11b. Making it easy.
[0006]
Foreign matter removal using the foreign matter removing catheter 10 is performed as follows. After confirming the position of the foreign substance F entering the bronchus B with the bronchoscope 14, one tube 12 a is fed into the bronchi B via the bronchoscope 14 until the distal balloon 11 a reaches the position over the foreign substance F ( FIG. 3a). The other tube 12b is inserted through the bronchoscope 14 so that the proximal balloon 11b is positioned in front of the foreign substance F. Here, since the deformation resistance of the distal end portion of the tube 12a is increased, the tube 12a easily gets over the foreign matter F.
[0007]
After the distal balloon 11a gets over the foreign substance F, the balloon expansion syringe 13a (FIG. 2b) is compressed to send a fluid to the distal balloon 11a and expand the distal balloon 11a (FIG. 3b). When the tube 12a is retracted while the distal balloon 11a is expanded, the foreign substance F is pushed by the expanded distal balloon 11a and moves in the bronchus B in the pulling direction. Prior to the movement of the foreign matter F, it is preferable to slightly retract the tip balloon 11a and check whether the foreign matter F moves.
[0008]
The foreign substance F contacts the hand side balloon 11b when the moving distance reaches a certain length. The contact of the foreign substance F with the hand side balloon 11b is detected because the fluid in the hand side balloon 11b is pushed out of the tube 12b by the contact and flows into the balloon expansion syringe 13b, and the cylinder of the balloon expansion syringe 13b is shaken. The
After the foreign object F comes into contact with the proximal balloon 11b, the fluid is sent from the tube 12b to the proximal balloon 11b by the operation of the balloon expansion syringe 13b to expand the proximal balloon 11b. As a result, the foreign substance F is gripped between the expanded distal balloon 11a and the proximal balloon 11b (FIG. 3c). By pulling out the balloons 11a and 11b together with the bronchoscope 14 in this state, the foreign matter F is removed from the bronchi B (FIG. 3d).
[0009]
Depending on the size of the foreign substance F contained in the bronchi B, it is necessary to change the distance L from the distal balloon 11a to the proximal balloon 11b. In such a case, since the vicinity of the distal end of the tube 12a is made of a material having a relatively large deformation resistance, the distance L commensurate with the size of the foreign substance F is adjusted by adjusting the length of the tube 12a protruding from the bronchoscope 14. Can be set.
Thus, when removing foreign substance F from the bronchus B with the foreign object F sandwiched between the distal balloon 11a and the proximal balloon 11b, the skill of the foreign object F is not required as in the basket catheter 1 (FIG. 1). And reliably removed. In addition, unlike the conventional basket catheter 1 (FIG. 1) in which the basket 4 is expanded by deformation of the thin metal wire 2, since the balloons 11a and 11b that are in contact with the inner wall of the organ are in contact with the organ inner wall, damage to the organ is extremely small. Become.
[0010]
【The invention's effect】
As described above, the foreign substance removing catheter according to the present invention is a method in which a foreign substance that has entered the bronchus is grasped between the distal balloon and the proximal balloon and removed from the bronchus. In addition, a complicated and highly skilled technique for accommodating foreign matter in the basket is not required, and foreign matter can be easily and reliably removed. Moreover, unlike the basket catheter, the expanded balloon contacts the inner wall of the organ, so that damage to the organ is extremely reduced.
[Brief description of the drawings]
FIG. 1 shows a conventional basket catheter basket in an expanded state (a), a contracted state (b), and a use form of a basket catheter (c)
FIG. 2 shows a steady state (a) of a foreign substance removal catheter according to the present invention, a state where a distal balloon is expanded (b), and a state where both balloons are expanded (c).
FIG. 3 is an explanatory diagram of an operation for removing foreign matter from the bronchi using the foreign matter removing catheter according to the present invention.
10: Foreign body removal catheter 11a, 11b: Balloon 12a, 12b: Tube 13a, 13b: Balloon dilating syringe 14: Bronchoscope T: Trachea B: Bronchial F: Foreign body L: Distance

Claims (1)

A pair of tubes inserted through the bronchoscope, a balloon that is attached to the distal end of each tube and expands or contracts by the inflow or discharge of fluid, and a tube that is attached to the proximal side of each tube to allow fluid to flow into each balloon Alternatively, a balloon expansion syringe is provided for discharging from each balloon, and the foreign object is grasped and removed between the distal balloon expanded over the foreign object that has entered the bronchus and the proximal balloon expanded on the proximal side from the foreign object. Catheter for removing foreign substances.

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