JP3132407U - Medical tube - Google Patents

Abstract

To provide a medical tube capable of inserting a guide wire and suppressing the guide wire from jumping out from a side hole.
A tube main body 1 having a main lumen 3 into which a guide wire 10 can be inserted, and a side hole 6 formed in the tube main body 1 so as to communicate with the main lumen 3, and a central axis 7 of the side hole 6 is provided. Is formed so as to be inclined with respect to the axial direction A of the tube body 1 and the inner opening of the side hole is formed closer to the tip of the tube body than the outer opening.
[Selection] Figure 4

Description

  The present invention relates to a medical tube that is introduced into a body and discharges a gas or a liquid substance, and more particularly to a medical tube through which a guide wire can be inserted.

  Conventionally, as an ileus tube used for diagnosing or treating intestinal obstruction, as shown in Patent Document 1, a leading element that functions as a weight is provided at the distal end portion of a tube body in which a plurality of lumens (ducts) are formed. A balloon is provided behind the leading element. Of the plurality of lumens formed in the tube body, the lumen having the largest diameter is used as the main lumen for discharging the contents in the intestine.

The tube main body is formed with a plurality of side holes communicating with the main lumen, and contents in the intestine are taken into the main lumen through the side holes. A guide wire can be inserted through the main lumen of the ileus tube. This guide wire serves to guide the ileus tube in the body.
Japanese Patent Laid-Open No. 08-173541

  By the way, the side hole formed in the ileus tube has a central axis 27 of the side hole 26 in a direction orthogonal to the axial direction A of the tube body 21 as shown in FIG. Therefore, when the guide wire 30 is inserted into the main lumen 23 with the tube body 21 bent, the tip of the guide wire 30 may enter the opening of the side hole 26, as shown in FIG. As described above, the guide wire 30 may jump out of the tube body 21.

  Therefore, an object of the present invention is to provide a medical tube capable of inserting a guide wire and suppressing the guide wire from jumping out of the side hole.

  To achieve the above object, a medical tube according to the present invention includes a tube body having a main lumen through which a guide wire can be inserted, and a side hole formed in the tube body so as to communicate with the main lumen, The central axis of the side hole is formed so as to be inclined with respect to the axial direction of the tube body, and the inner opening of the side hole is formed so as to be located closer to the tip of the tube body than the outer opening.

  According to the above configuration, since the side hole is formed so as to be inclined with respect to the axial direction of the tube body, when the tip of the guide wire enters the opening of the side hole and comes into contact with the peripheral wall of the side hole, Such a force can be decomposed into a force for pressing the tip of the guide wire in a direction perpendicular to the peripheral wall and a force for moving the tip of the guide wire along the peripheral wall inward in the radial direction of the tube body. That is, since the guide wire tends to move inward in the radial direction of the tube body along the peripheral wall of the side hole, it is possible to effectively suppress the guide wire from jumping out of the side hole.

  The medical tube according to the present invention can be used without particular limitation as long as it has a side hole and is guided using a guide wire, such as a percutaneous biliary drainage tube (PTCD tube). In addition to the drainage catheter, it can be suitably used as an ileus tube.

  As is clear from the above description, according to the present invention, the side hole is formed so that the central axis is inclined with respect to the axial direction of the tube body, so that the guide wire is effectively prevented from jumping out from the side hole. can do.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1-3 is a figure which shows embodiment of an ileus tube as a medical tube which concerns on this invention, FIG. 1 is a top view of an ileus tube, FIG. 2 is an enlarged view of the side hole part in FIG. 3 shows the AA cross-sectional view in FIG.

  The ileus tube in the present embodiment includes a guide 2 at the tip of the tube body 1. The lead 2 is configured by covering a plurality of spherical bodies made of metal or ceramics with an elastic body such as silicone rubber in a state where a plurality of spherical bodies are arranged in series. The leading element 2 has a hollow structure in the axial direction and communicates with the main lumen 3 of the tube body 1.

  In the tube body 1, a balloon 4 is provided behind the guide 2. The tube body 1 basically includes a main lumen 3 serving as a passage for discharging the contents in the intestine to the outside, and a sub-lumen 5 for injecting an inflation fluid into the balloon 4. A side hole 6 communicating with the main lumen 3 is formed in the tube body 1 before and after the balloon 4.

  FIG. 4 is a longitudinal sectional view showing a part of the tube body. In the present embodiment, the side hole 6 is formed such that the central axis 7 is inclined with respect to the axial direction A parallel to the axis 12 of the tube body 1. The direction of the inclination of the side hole 6 is such that the inner opening 8 formed on the inner surface of the tube body 1 by drilling the side hole 6 is closer to the tip of the tube body 1 than the outer opening 9 formed on the outer surface. It is formed so that it may be located in.

  By inclining the side hole 6 in this way, the peripheral wall 11 of the side hole 6 is formed as an inclined surface that is inclined with respect to the axial direction A of the tube body 1. When the guide wire 10 is pressed against the peripheral wall 11 of the side hole formed in this way, the force F is, as shown in FIG. 4, a force pressing the guide wire 10 in a direction orthogonal to the peripheral wall 11 and the guide wire. 10 can be disassembled into a force that moves the tip of the tube body 1 radially inward along the peripheral wall 11. Thereby, it becomes possible to effectively suppress the guide wire 10 from jumping out of the side 6 holes.

The top view which shows the ileus tube which concerns on this invention Enlarged view of the side hole portion in FIG. AA cross-sectional view in FIG. Longitudinal sectional view showing a part of the tube body A longitudinal sectional view showing a part of a tube body of a conventional ileus tube The figure which shows the state which the guide wire protruded from the tube main body in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tube body 2 Leader 3 Main lumen 4 Balloon 5 Sublumen 6 Side hole 7 Central axis of side hole 8 Inner opening 9 Outer opening 10 Guide wire 11 Peripheral wall of side hole 12 Tube body axis A Axis direction of tube body

Claims (2)

A tube main body having a main lumen into which a guide wire can be inserted; and a side hole formed in the tube main body so as to communicate with the main lumen, the central axis of the side hole being in the axial direction of the tube main body A medical tube characterized in that the inner opening of the side hole is positioned closer to the tip of the tube body than the outer opening. The medical tube according to claim 1, wherein the medical tube is used as an ileus tube.

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