JP2019176919A - Reinforcement body for catheter - Google Patents

Abstract

To provide a reinforcement body for a catheter that reinforces a catheter to prevent a kink capable of receiving external force by a plane even when receiving the external force such as tightening force of a screw of a fastener for fastening a wing, and capable of reliably fastening the wing outside a body.SOLUTION: A reinforcement body for a catheter includes: a first reinforcement body part 2 buried in a peripheral wall from one end of a catheter to an axial direction intermediate part; and a second reinforcement body part 3 connected to the first reinforcement body part 2 at the axial direction intermediate part of the catheter and buried in the peripheral wall to the other end. The cross section of the second reinforcement body part 3 is formed into a round shape while the cross section of the first reinforcement body part 2 is formed into a non-round shape.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a reinforcing member for a catheter, and more particularly to a technique that reinforces a catheter by being helically embedded in a peripheral wall of a catheter such as a tracheostomy tube or an endotracheal tube and prevents its kink. It is.

  For patients who need long-term respiratory management, if respiratory management is performed using an endotracheal tube that is inserted orally, the movement of the patient's head, tissue compression by the endotracheal tube, generation of ulcers, In addition, there is a high possibility of problems such as infection due to contamination of the endotracheal tube. Therefore, as a workaround, tracheotomy has been conventionally performed in which the throat is incised to the trachea and the tube is percutaneously inserted into the trachea to perform respiratory management.

  On the outer side of the tracheostomy tube inserted percutaneously into the trachea, there are provided a connector for connection to an anesthesia machine and a ventilator, and a throat fixing wing for preventing the tube from falling off. The tube body has an anatomically designed degree of curvature so that stress is not applied to the trachea during placement. In addition, there are also known a tube with a cuff attached to the tip of the tube and a tube with a lumen for sucking secretions. In addition, if the tracheostomy tube is made of a very soft material, there is a risk of kinking the tube during use. To prevent this, a reinforcement body is embedded in the peripheral wall of the tube body in a spiral fashion, or MRI inspection is performed. In order to prevent halation from occurring due to a strong magnetic field, a tracheostomy tube in which a reinforcing body is a non-magnetic body is also known (Patent Documents 1 and 2).

  By the way, although the reinforcement body currently disclosed by patent document 1, 2 is not clearly described, it is thought that the cross section is formed in the round shape (circle (perfect circle) shape). Since the round reinforcing body has flexibility, it can follow the shape of the trachea and reduce the onset of ulcers etc. even if the tracheostomy tube embedded in it is inserted into the trachea. When used for tracheostomy tubes with movable wings, when the external force such as the tightening force of the fastener of the fixture that secures the wing is received, the force is not distributed because the reinforcement of the part receives the external force at "points" However, there is a problem that the spiral shape is deformed so that it is easy to rotate and the wing cannot be fixed.

  In addition, a tube holder similar to the wing may be used for the endotracheal tube, but in this case as well, there is a similar problem because the holder is fixed with screws. In addition, blood vessels that are punctured into the blood vessel and used to remove blood from the inserted part will bend from the inserted part to the outside of the body, damaging the blood vessel wall or causing thrombus due to deformation of the pipe There was a problem to do.

Japanese Utility Model Publication No. 6-13846 (Claim 1) Japanese Patent No. 5689056 (paragraph 0022)

  Therefore, the present invention solves the problems of the conventional ones including the techniques disclosed in Patent Documents 1 and 2, and is a catheter that is helically embedded in the peripheral wall of the catheter, such as a tracheostomy tube or an endotracheal tube. An object of the present invention is to provide a reinforcing body for a catheter that can reinforce and prevent kinking and can securely fix wings and the like outside the body.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a helical reinforcing body embedded in the peripheral wall of the catheter to reinforce the catheter, and is axially extended from one end of the catheter. A first reinforcing body portion embedded in the peripheral wall up to the intermediate portion; a second reinforcing body portion connected to the first reinforcing body portion in the axial intermediate portion of the catheter body and embedded in the peripheral wall up to the other end portion; The second reinforcing body portion is formed in a round shape in cross section, and the first reinforcing body portion is formed in a non-round shape in cross section. Is the body.

  The invention according to claim 2 is the shape in which, in claim 1, the connecting portion between the first reinforcing body portion and the second reinforcing body portion has a shape in which the cross-sectional shape gradually and continuously changes from a non-round shape to a round shape. It is characterized by becoming. A third aspect of the present invention is characterized in that, in the first or second aspect, the cross-sectional shape of the first reinforcing body portion is a perfect circle. The invention according to claim 4 is characterized in that, in claim 3, the cross-sectional shape of the second reinforcing member portion is a polygonal shape.

  According to a fifth aspect of the present invention, in the fourth aspect, the polygonal shape is a square shape. The invention according to claim 6 is characterized in that, in claim 3, the cross-sectional shape of the second reinforcing member portion is an elliptical shape.

  The invention described in claim 7 is a catheter in which the catheter reinforcing body according to any one of claims 1 to 6 is embedded in the peripheral wall of the catheter body. Examples of this catheter (including cannula) include a tracheostomy tube, an endotracheal tube, a blood vessel, a blood vessel remover, and the like.

  The present invention is as described above, and according to the first to sixth aspects of the present invention, the first reinforcing body portion embedded in the peripheral wall from one end of the catheter to the intermediate portion in the axial direction; The first reinforcing body portion and a second reinforcing body portion connected at the axially intermediate portion of the catheter body and embedded in the peripheral wall up to the other end portion. Is formed in a round shape, and the cross section of the first reinforcing body portion is formed in a non-round shape. Therefore, the first reinforcing body portion is helically embedded in the peripheral wall of the catheter to reinforce the catheter and prevent its kink. In addition, even when an external force such as a tightening force of a fixing tool screw that fixes the wing is received, the external force can be received by the “surface”, and the wing can be reliably fixed outside the body. In addition, when using a tube holder instead of a wing like an endotracheal tube, the same effect can be expected, and it is also inserted in a blood supply tube or a blood vessel that is punctured into a blood vessel. Since it does not bend like a conventional part in the part which goes out of the body from the part which exists, there exists the outstanding effect that the blood vessel wall is damaged or the thrombus resulting from a deformation | transformation of a pipe | tube does not occur.

  According to the seventh aspect of the present invention, it is possible to provide a catheter in which the catheter reinforcing body as described above is embedded.

The catheter reinforcement body which concerns on one embodiment of this invention is shown, (A) is the schematic, (B) is an image figure in the shape change part of a reinforcement body cross section. It is the whole tracheostomy tube front view in which the reinforcement body for catheters same as the above is used. It is a sectional side view same as the above. It is effect | action explanatory drawing which shows the usage. It is whole front sectional drawing which shows the example used for the endotracheal tube. The example used for the blood-feeding tube is shown, (A) is the whole front sectional view, (B) is a usage example diagram. The other embodiment of the reinforcement body for catheters is shown, (A) is the schematic, (B) is the image figure in the shape change part of a reinforcement body cross section. Another embodiment of the reinforcement body for catheters is shown, (A) is the schematic diagram, (B) is an image figure in the shape change part of a reinforcement body cross section. It is sectional drawing which shows the various modifications of the cross-sectional shape of the 2nd reinforcement body part formed in the non-round shape in the reinforcement body for catheters.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  In FIG. 1, 1 shows the reinforcement body for catheters. The reinforcing body (wire) 1 is formed in a spiral shape, and is made of a nonmagnetic material made of titanium or nickel titanium alloy. The reinforcing body 1 is configured as a single body including a first reinforcing body portion 2 and a second reinforcing body portion 3. The cross section of the second reinforcing body portion 3 is formed in a perfect circle shape (round shape). The cross section of the first reinforcing body portion 2 is formed in a rectangular shape (non-round shape). The connection part of the 1st reinforcement body part 2 and the 2nd reinforcement body part 3 becomes a shape where the cross-sectional shape changed gradually from the rectangular shape to the perfect circle shape like illustration.

  2 and 3 show a tracheostomy tube in which the reinforcing body 1 is embedded. The tracheostomy tube 11 is made of silicone rubber or the like, and includes a tube main body 13 having an inner cavity 12 formed in the axial direction, a throat fixing wing (flange) 15 attached to the tube main body, and the like. It is.

  The tube body 13 has a predetermined length (for example, about 165 mm), has an outer diameter of about 13.5 mm and an inner diameter of about 10.0 mm, and has a distal end and a proximal end communicating with the lumen 12 and opening. A cuff 16 is provided on the outer peripheral surface near the tip opening. The wing 15 is formed of a rectangular flat plate body, and a central hole is formed in the center of the wing 15 so as to be elastically press-fitted into an annular groove of a fixture described later. On the other hand, a connector 18 for connection with an anesthesia machine or a ventilator is attached to the proximal end opening of the tube body 13. A resin fixture 20 with a wing is slidably fitted and attached to the tube body on the tip side of the connector 18. The configuration of the fixture 20 is substantially the same as that described as Patent Document 1 according to the applicant's proposal, but the outline thereof will be briefly described below.

  That is, the fixture 20 includes a cylindrical body (first cylindrical body) 21 and a cylindrical body (second cylindrical body) 31 that are both formed in a cylindrical shape. The cylinder 21 has an axial hole 23 that is slidably inserted into the tube body 13. An annular concave groove 25 into which the center hole of the elastic wing 15 made of silicone rubber is elastically press-fitted is formed on the lower outer peripheral surface of the cylindrical body 21. Reference numerals 26 and 27 denote escape prevention flange portions provided at upper and lower edges thereof. A male screw 28 is provided on the upper outer peripheral surface of the cylindrical body 21. The upper end edge of the cylinder 21 provided with the male screw 28 can be elastically displaced.

  On the other hand, the cylindrical body 31 has an axial hole 33 slidably fitted into the tube body 13. On the inner peripheral surface of the cylindrical body 31 having the axial hole 33, a female screw 35 that is screwed into the male screw 28 of the cylindrical body 21 is provided at a position below the push-in portion 34 formed at the upper end edge. The tube main body 13 can be tightened by screwing into the male screw 28 and pushing the pushing portion 34 of the cylinder 31 into the upper end edge of the cylinder 21 to elastically displace the edge radially inward. Yes. In addition to the above, the structure for tightening may be configured by dividing the upper end edge of the cylindrical body 21 into a plurality of parts in the circumferential direction to form a claw part that can be elastically displaced in the radial direction. Reference numeral 37 denotes a knurl attached to the outer peripheral surface of the cylindrical body 31. In order to release the fixing by the fixing tool 20, the screwing of the cylinder 21 to the male screw 28 by the female screw 35 of the cylinder 31 is loosened. As a result, the upper end edge of the cylindrical body 21 is elastically restored outward in the radial direction, and the wing 15 can slide on the tube body 13 together with the fixture.

  When the tube main body 13 is fastened and fixed by the fixing tool 20 as described above, the wing 15 is fixed at a predetermined position and cannot slide on the tube main body 13. Thereby, the insertion amount of the tube main body 13 into the trachea is also set to the length from the wing 15 to the tip. In addition, since the wing 15 is slidably attached to the tube body 13, there is a possibility that a load is applied to the throat after setting, and there is a possibility that it may move and lead to an unexpected accident of the patient. Not safe.

  In the peripheral wall of the tube body 13, the above-described reinforcing body 1 is embedded over almost the entire length from the distal end to the proximal end of the tube body 3. In other words, the reinforcing body 1 is such that the middle part thereof is the attachment position of the wing 15, and the second shape having a perfect circular cross section from the position where the wing 15 of the tube body 13 is located to the tip of the wing 15 is the boundary. The first reinforcing body portion 2 having a rectangular cross section is embedded from the position where the wings 15 of the tube main body 13 are located to the base end. By embedding the reinforcing body 1, the base end side (outside the body) is hard and the distal end side (inside the body) is soft from the position of the wing 15 of the tube body 13. Therefore, even if a large force is applied from the outside in a state of being inserted into the trachea, the patient's rear wall of the trachea is not damaged. In addition, it is based on the following reason that the cross-sectional shape of the reinforcement body 1 embed | buried under the tube main body 13 is varied as mentioned above.

  That is, since no external force is particularly applied from the position where the wing 15 of the tube body 13 is located to the tip, the cross section thereof may be a perfect circle. However, if the same circle is also formed from the position where the wing 15 is located to the proximal end, As described in the description, when an external force such as a tightening force by the female screw 35 of the cylindrical body 31 of the fixing member 20 for fixing the wing 15 is received, the portion of the reinforcing body 1 near the wing 15 rotates to deform its shape. There is a risk of doing. For this reason, at least from the position where the wing 15 of the tube main body 13 is located to the fixture 20, it is preferable that the cross section of the reinforcing body 1 be formed in a shape other than a perfect circle to prevent rotation and deformation. The cross section of the reinforcing body 1 from the position where the wing 15 of the tube main body 13 is located to the base end is a polygonal shape. A rectangular shape is a preferred example, and a polygonal shape other than a rectangular shape may be used as long as it has the same effect.

  In the reinforcing body 1 described above, the vertical and horizontal dimensions of the cross section formed in a rectangular shape are preferably about 0.5 mm in length and about 0.2 mm in width. Further, the cross-sectional (outer diameter) dimension formed in a round shape is preferably about 0.2 mm. This dimension is merely an example, and it goes without saying that the dimension varies depending on the dimension of the tube body 13 and is similar to the dimension of the tube body 13 described above.

  Branch tubes 46 and 47 are provided at the proximal end of the tube body 13. The branch tube 46 is provided with a pilot balloon 48 for confirming the expansion state of the cuff 16. The pilot balloon 48 is attached so that the distal end opening portion thereof communicates with a cuff lumen (not shown) formed in the axial direction of the peripheral wall at the proximal end portion of the tube main body 13. The pilot balloon 48 is provided with a one-way valve 49, and the one-way valve is provided with an opening / closing spring 50. The opening / closing spring 50 is made of titanium or nickel titanium alloy. 51 is a stopper for the opening. The reason why the open / close spring 50 is made of titanium or nickel titanium alloy in the same manner as the reinforcing body 1 is to prevent it from being affected by the MRI examination.

  The branch tube 47 is attached to the outer peripheral surface of the tube body 13 along the axial direction so that the opening at the tip thereof is located near the cuff 16, and sucks the secretion fluid such as saliva collected outside the body of the cuff 16. It is a suction tube for discharging. 52 is the opening / closing stopper.

  As described above, in the tracheostomy tube 11, most members such as the tube body 13, the wing 15, the fixture 20, and the branch tubes 46 and 47 are suitable for living bodies. For example, rubber or resin including silicone rubber is used. However, only the reinforcing member 1 and the open / close spring 50 are made of titanium or a nickel titanium alloy as a non-magnetic material. By making the reinforcing body 1 and the opening / closing spring 50 made of titanium or a nickel titanium alloy as described above, it becomes possible to eliminate halation even by MRI inspection.

  Next, the usage of the tracheostomy tube 11 in which the reinforcing body 1 is embedded in the peripheral wall of the tube body 13 will be described with reference to FIG. When intubating, after fixing the fixture 20 at an arbitrary position set on the tube main body 13, straighten the distal end of the tube main body 13 bent in advance by a stylet (not shown) and then from the distal end side of the patient. Insert into the trachea at the incised throat site. Then, the tube main body 13 is advanced while confirming the insertion position, and the stylet is gently pulled out when the distal end portion is inserted into the left bronchus, for example, from the trachea, and the distal end portion hits the bifurcation (carina) of the trachea and bronchus. This ends the intubation.

  After intubation, the cuff 16 is inflated to firmly fix the tip of the tube body 13. As a result, the tracheostomy tube 11 is intubated and fixed at an appropriate position, and various operations are performed in this state. In the operation of this operation, an external load is applied to the tube main body 13, and even if the tube main body 13 further tries to enter the trachea, the wing 15 of the fixture 20 is in contact with the surface of the throat region. Insertion is prevented.

  When fixing the wing 15 on the tube main body 13, the cylindrical body 31 provided on the fixture 20 is tightened with a screw toward the cylindrical body 21, so that the reinforcing body 1 has a rectangular cross section. Even when a force (external force) is applied, the external force can be supported by the surface. Therefore, the wing 15 can be reliably fixed outside the body without rotating and deforming unlike the conventional reinforcing body. That is, the wing 15 is fixed at a predetermined position and does not move. Thereby, the insertion amount of the tube body 13 into the trachea is also set to the length from the wing 15 to the tip. Accordingly, the wing 15 can be easily and reliably fixed at the part outside the body.

  FIG. 5 shows another example in which the reinforcing body 1 is embedded in the peripheral wall of the tube body of the endotracheal tube. The endotracheal tube 61 is made of silicone rubber or the like, and includes a tube body 63 having a lumen 62 formed in the axial direction, and the like.

  The tube body 63 has substantially the same configuration as the tube body of the tracheostomy tube 11. That is, it has a predetermined length (for example, about 330 mm), an outer diameter of about 11.0 mm, an inner diameter of about 8.0 mm, and a distal end and a proximal end that communicate with the lumen 62 and are open. A cuff 65 is provided on the outer peripheral surface near the tip opening. Further, the reinforcing body 1 described above is embedded in the peripheral wall of the tube body 63 over almost the entire length from the distal end to the proximal end of the tube body 63. In the reinforcing body 1, a second reinforcing body portion 3 having a circular cross section (round shape) is embedded in the peripheral wall from the distal end of the tube body 63 to the axially intermediate portion, and the intermediate portion to the proximal end are embedded. A first reinforcing body portion 2 having a rectangular cross section (non-round shape) is embedded in the peripheral wall. 68 is a connector for connection, and 69 is a pilot balloon.

  As described above, the endotracheal tube 61 in which the reinforcing body 1 is embedded in the peripheral wall of the tube main body 63 is inserted into the trachea diametrically to manage the breathing of the patient, but the tracheostomy tube 11 is fixed when the tube is fixed. A tube holder (not shown) similar to that of the wing 15 may be provided and used. Since this holder presses and fixes a tube with a screw, there is an advantage that it can be securely fixed similarly to the tracheostomy tube 11. That is, by embedding the reinforcing body 1, the proximal end side (outside the body) is hard and the distal end side (inside the body) is soft from the intermediate portion of the tube main body 63. Therefore, even if a large force is applied from the outside in a state of being inserted into the trachea, the patient's rear wall of the trachea is not damaged. Thus, also in the endotracheal tube 61, since the cross section from the base end part of the tube main body 63 of the embedded reinforcing body 1 to the middle part has a polygonal shape, the reinforcing body 1 embedded in the tracheostomy tube 11 and The same effect can be expected. This holder also has a function of preventing the patient from biting the endotracheal tube 61 (bite block). However, even when the holder is deformed, there is an advantage that deformation of the lumen 62 of the tube main body 63 can be prevented.

  FIGS. 6A and 6B show still another example in which the reinforcing body 1 is embedded in the peripheral wall of the tube main body of the blood sending tube. The blood supply tube 71 is made of silicone rubber or the like, and includes a tube main body 73 in which a lumen 72 is formed in the axial direction, and the like.

  The tube main body 73 has a predetermined length (for example, about 150 mm), has an outer diameter of about 6.0 mm and an inner diameter of about 5.0 mm, and has a distal end and a proximal end communicating with the lumen 72 and opening. is doing. Further, the reinforcing body 1 is embedded in the peripheral wall of the tube main body 73 so that the second reinforcing body portion 3 is formed from the distal end to the axial intermediate portion, and the first reinforcing body portion 2 is formed from the intermediate portion to the proximal end. ing. Reference numeral 77 is a connection tube connected to the tube body 73, and 78 is a connection connector. The total length from the distal end of the tube main body 73 as the blood supply tube 71 to the connection portion on the proximal end side of the connection connector 78 is about 220 mm.

  As described above, the blood sending tube 71 in which the reinforcing body 1 is embedded in the peripheral wall of the tube main body 73 is connected to an oxygenator to circulate oxygenated blood when operating the heart or assisting the function of the heart or lungs. As is clear from the usage example of (B), an artificial cardiopulmonary circuit (tube) 79 is connected to the connection connector 78, and the distal end side of the tube main body 73 is inserted from outside the body into the blood vessel. However, due to the embedding of the reinforcing body 1, the proximal end side (outside the body) is hard and the distal end side (inside the body) is soft due to the embedding of the reinforcing body 1, and the inside of the blood vessel Even if a large force is applied from the outside in the state of being inserted into the container, damage to the blood vessel wall of the patient can be suppressed. In addition, the tube is pressed by skin or muscle on the proximal end side, or the tube body is curved just under the insertion part, but the cross section of the reinforcing body of the part is rectangular and the tube deforms (if the lumen is deformed) Can be prevented). Thus, also in the blood feeding tube, since the cross section from the proximal end portion of the tube main body 73 of the embedded reinforcing body 1 to the intermediate portion has a polygonal shape, the same effect as the reinforcing body 1 embedded in the tracheostomy tube 11 is obtained. Can be expected. Although the blood vessel has been described here, the same can be said for the blood vessel removal.

  FIGS. 7A and 7B show another embodiment of the catheter reinforcing body, in which FIG. 7A is a schematic view thereof, and FIG. 7B is an image view of the shape change portion of the cross section of the reinforcing body. The reinforcing body (wire) 81 shown here is configured as a single one formed in a spiral like the reinforcing body 1, and includes a first reinforcing body portion 82 and a second reinforcing body portion 83. . The second reinforcing body portion 83 has a perfect circular shape (round shape) in cross section. The cross section of the first reinforcing body portion 82 is formed in an elliptical shape (non-round shape). As shown in the drawing, the connecting portion between the first reinforcing body portion 82 and the second reinforcing body portion 83 has a shape in which the cross-sectional shape gradually and continuously changes from an elliptical shape to a perfect circle shape. Other than that, the material is made of a non-magnetic material made of titanium or nickel titanium alloy, and the like.

  8A and 8B show still another embodiment of the catheter reinforcing body, FIG. 8A is a schematic view thereof, and FIG. 8B is an image view of a shape change portion of the reinforcing body cross section. The reinforcing body (wire) 91 shown here is configured as a single spiral formed similarly to the reinforcing body 1, and includes a first reinforcing body portion 92 and a second reinforcing body portion 93. . The cross section of the second reinforcing body portion 93 is formed in a perfect circle shape (round shape). The first reinforcing body portion 92 has an elliptical cross section (non-round shape). As shown in the drawing, the connecting portion between the first reinforcing body portion 82 and the second reinforcing body portion 83 has a shape in which the cross-sectional shape gradually and continuously changes from an elliptical shape to a perfect circular shape. Other than that, the material is made of a non-magnetic material made of titanium or nickel titanium alloy, and the like.

  In FIG. 7 (A) and FIG. 8 (A), the spiral display as shown in FIG. 1 (A) should be originally used. However, since the cross-sectional shape is difficult to understand, the spiral display is omitted. Yes. The catheter reinforcing bodies 81 and 91 as described above can be expected to have the same effects as the catheter reinforcing body 1.

  9A to 9J show various modified examples of the cross-sectional shape corresponding to the first reinforcing body portions 2, 82, 92 formed in a non-round shape. In (A), the cross-sectional shape is formed in a square shape, and (B) shown below is also formed in a shape that can be said to be a polygonal shape or an elliptical shape. As can be seen from these examples, the first reinforcing body portions 2, 82, 92 formed in a non-round shape are not limited to a rectangular shape or an elliptical shape, but may be a shape shown in these shapes.

  In the above, the connecting portion of the first reinforcing body portions 2, 82, 92 and the second reinforcing body portions 3, 83, 93 has a shape in which the cross-sectional shape gradually and continuously changes from a non-round shape to a round shape. However, such a shape is not necessarily required, and a configuration that directly changes from a non-circular shape to a round shape, that is, a configuration in which a non-circular cross section and a circular cross section are directly bonded and connected may be used. In addition, although a tracheostomy tube, an endotracheal tube, a blood supply tube, and the like have been described as catheters in which the reinforcing body is implemented, this is an example, and it goes without saying that the catheter may be implemented on other catheters. Further, it goes without saying that the design of the first reinforcing body portion formed in the non-round shape of the reinforcing body can be arbitrarily changed within the scope described in the claims.

81, 91 Reinforcing body 82, 92 Part 83, 93 Part 11 Tracheostomy tube 12 Lumen 13 Tube body 15 Throat fixing wing (flange)
16 Cuff 18 Connector 20 Fixture 46, 47 Branching tube 48 Pilot balloon 49 One valve 50 Opening spring 51, 52 Opening / closing stopper 61 Endotracheal tube 71 Feeding blood vessel

Claims (7)

A helical reinforcement body embedded in the peripheral wall of the catheter to reinforce the catheter,
A first reinforcing member embedded in a peripheral wall from one end of the catheter to an axially intermediate portion, and the other end connected to the first reinforcing member and the axial intermediate portion of the catheter body; A second reinforcing body portion embedded in the peripheral wall up to the portion, the second reinforcing body portion having a round cross section, and the first reinforcing body portion having a non-round cross section. A reinforcing member for a catheter characterized by comprising:   2. The catheter reinforcement body according to claim 1, wherein a connection portion between the first reinforcement body portion and the second reinforcement body portion has a shape in which a cross-sectional shape gradually and continuously changes from a non-round shape to a round shape. .   The catheter reinforcing body according to claim 1 or 2, wherein a cross-sectional shape of the first reinforcing body portion is a perfect circle.   The catheter reinforcing body according to claim 3, wherein a cross-sectional shape of the second reinforcing body portion is a polygonal shape.   The reinforcement body for a catheter according to claim 4, wherein the polygonal shape is a square shape.   The catheter reinforcing body according to claim 3, wherein a cross-sectional shape of the second reinforcing body portion is an elliptical shape.   A catheter, wherein the catheter reinforcement body according to any one of claims 1 to 6 is embedded in a peripheral wall of the catheter body.