JPH03247330A - Apparatus for opening blood tube - Google Patents

Abstract

PURPOSE:To enable treatment of a closure of a blood tube by providing a forcing body having a spherical face at the tip of a torque tube soft to allow the formation of an open path at a part of a complete closure. CONSTITUTION:This apparatus for opening a blood tube is provided with a forcing body 14 which has a spherical face 134a at the tip of a torque tube 13 soft. The apparatus for opening the blood tube is inserted into a blood tube 18 cutaneously utilizing the softness of the torque tube 13 and when the forcing body 14 reaches a point of the blood tube closed completely as caused by thrombus 14 or atheroma, the forcing body is forced forward to a point 5 where a trace of an open path exists utilizing the spherical face 14a with the rotation of the torque tube 13 while a new open path 1a is formed by piercing. The open path 1a thus obtained is used to treat the closure of the blood tube.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a blood vessel opening device suitable for forming an open passage through a thrombus or atheroma that occludes a blood vessel.

[Prior Art] As a method for treating occlusion of a blood vessel, the distal end of a balloon catheter 2 is inserted into an open passage 1 in the area of lumen occlusion as shown in FIG. 5(A), As shown in the figure, the balloon 3 at the tip of the catheter is pressurized and expanded to mechanically crush the thrombus 4 or atheroma, stretch the blood vessel wall, expand the occluded area, and improve blood flow. A balloon with a cutting blade attached to the tip of the catheter is inserted into the open passage of the lumen occlusion, the balloon is pressurized and inflated, the cutting blade is pressed against the thrombus or atheroma, and the balloon catheter is moved back and forth or rotated. By removing the thrombus or atheroma, blood flow can be improved, or by inserting the tip of a balloon catheter into an open passage and advancing ahead of the thrombus or atheroma, the balloon can be inflated to remove the thrombus from the body. The blood flow is ensured by moving the blood to the body and removing it.

[Problems to be Solved by the Invention] However, these methods of treating vascular occlusion involve inserting and arranging the tip of a balloon catheter in the open passage position of the lumen occluded portion, or passing the tip of the balloon catheter through the open passage to remove blood clots and Since it is necessary to enter ahead of the atheroma, if the lumen of the blood vessel is completely occluded by thrombus 4 or atheroma and does not have an open passage, as shown in Fig. There was a problem in that the tip of the balloon catheter could not be inserted through the tube or the tip of the balloon catheter could not be advanced beyond the thrombus or atheroma, and the above-mentioned vascular occlusion treatment could not be performed. .

The inventor discovered that even when the blood vessel lumen is completely occluded as shown in Fig. 6, there is a trace of an open passage 5 in the center of the lumen occluded part.
This invention was achieved as a result of various attempts to form an open passage using this trace 5, in view of the fact that RLI remains. An object of the present invention is to provide a vascular opener that enables treatment of vascular occlusion.

[Means for Solving the Problems] The blood vessel opening device of the present invention is a device in which a pushing body having a spherical surface is provided at the tip of a flexible torque tube.

[Function] With the above configuration, an open passage is formed by pushing the spherical surface of the pushing body into the open passage trace portion of the lumen closed part while rotating the torque tube. By utilizing this open channel, it becomes possible to treat normal vascular occlusion.

[Example] Embodiments of the present invention will be described below with reference to the accompanying drawings.

Note that the same parts as in FIGS. 5 and 6 are given the same reference numerals, and explanations of the same parts will be omitted.

As shown in FIGS. 1 and 2, a thin flexible coil wire 11 is covered with a guide tube 12 made of plastic that has flexibility and sliding properties, and a torque tube 13 that has flexibility and sliding properties. A push-in body 14 having a spherical surface 14a and having a circular or elliptical shape is fixed to the tip of the torque tube 13, and a hole communicating between the hollow part of the torque tube 13 and the outside is attached to the push-in body 14. 15 to constitute a blood vessel opener. Also torque tube 1
A motor 16 or a rotary operation handle (not shown) is provided at the base end of 3 so as to be able to selectively approach and separate. Also guide w1
It is preferable to use plastic with high sliding properties as the material 2, whose surface friction coefficient decreases dramatically when soaked in water. Further, a core wire 17 having an appropriate hardness as shown in FIG. 3 is inserted into the torque tube 13 as necessary.

Next, the operation of the above configuration will be explained.

First, a blood vessel opener is percutaneously inserted into the blood vessel 18. When the pushing body 14 at the tip of the torque tube 13 reaches a location completely occluded by thrombus 4 or atheroma as shown in FIG. 4 (A>), the core wire 1 is inserted into the torque tube 13.
1 is inserted and the torque @ 13 is applied while rotating by the motor 16 or by manual operation, and as a result, as shown in FIG. 14 is forcibly inserted. Thereafter, this operation is continued to advance the pusher 14 as shown in FIG. 4(C), and when the pusher 14 penetrates the occluded portion as shown in FIG. 4(D), blood flows into the pusher as shown by the arrow. It flows into the hollow part of the torque tube 13 through the hole 15 of 14, thereby making it possible to ivg the penetration state.

After forming the open passage 1a in this way, FIG. 4(E)
As shown in FIG. 2, the blood vessel opener is pulled out from the blood vessel 18 by placing it on the core wire 17, and the balloon catheter 2 is inserted into the blood vessel 18 along the core wire 17 and inserted into the open passage 1a, or placed in front of the open passage 1a. The occlusion of the blood vessel 18 is treated by entering the blood vessel 18 into the blood vessel 18.

In this way, in the above-mentioned embodiment, a blood vessel opening device is used in which a pushing body 14 having a spherical surface 14a is provided at the distal end of a flexible torque tube 13.
3 is inserted percutaneously into the blood vessel 18, and when the pusher body 14 reaches the area completely occluded by the white plug 4 or atheroma, the bulb i is inserted while rotating the torque tube 13.
j 14a, the pushing body 14 is forced into the closed passage trace location 5 and penetrated to form a new open passage 1a, and by utilizing this opening 1!11a, the treatment of blood vessel occlusion can be performed. It is something that is given. As a result, as shown in Fig. 6, even when the vascular lumen is completely occluded by thrombus 4 or atheroma and there is no open passage, it becomes possible to treat the occlusion of the blood vessel, and angioplasty can be performed. It has excellent effects in

In addition, the flexible thin coil wire 11 is connected to a guide tube 12 made of flexible and sliding plastic.
By integrally covering and forming the torque tube 13 having flexibility and sliding properties, the flexibility and sliding properties of the torque tube 13 allow smooth insertion of the blood vessel opening device into the blood vessel 18. can. Further, the pushing body 14 has a spherical surface 14a.
By having the hole 15, pressure entry into the closed passage trace location 5 is performed smoothly, and the penetration state of the pushing body 14 can be confirmed by blood flowing into the blood vessel opener from the hole 15. have an effect.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the gist of the present invention. For example, the materials of the guide tube, wire, and pusher may be selected as appropriate.

[Effects of the Invention] By providing a pushing body with a spherical surface at the tip of a flexible torque tube, the present invention makes it possible to form an open passage in a completely occluded part, thereby making it possible to treat vascular occlusion. A vessel opener can be provided.

[Brief explanation of drawings]

1 to 4 show one embodiment of the present invention, in which FIG. 1 is a partially cutaway perspective view showing a blood vessel opening device, FIG. 2 is a sectional view of the blood vessel opening device, and FIG. 3 is a core wire Front view, Figure 4 (A)
From (E) to (E) are schematic explanatory diagrams showing the order of forming an open channel; FIG. It is a schematic explanatory diagram. 13...Torque tube 14...Pushing body 14a...Spherical surface patent applicant Inter-Tsuba Co., Ltd. Rijin

Claims (1)

[Claims] A blood vessel opening device characterized in that a pushing body having a spherical surface is provided at the tip of a flexible torque tube.