JP2012005528A - Luminal form tracer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminal form tracer that can depict the inside of a luminal while preventing a body fluid from being interrupted.SOLUTION: The luminal form tracer 10 includes: a flexible long-length body 100; a plurality of elastically deformable opening and closing parts 102 that are disposed in an opening state radially extending from the long-length body from the opening state to a closing state falling toward the long-length body; and a radiographic wire 104, one end of which is connected with the opening and closing part and the other end of which is connected with the long-length or the opening and closing part.

Description

  The present invention relates to a lumen form tracer for depicting an intraluminal form.

  In recent years, for example, as disclosed in Patent Document 1, a balloon introduced into a lumen is expanded, and the shape and dimensions inside the lumen are percutaneously changed by deforming the balloon according to the shape inside the lumen. Techniques for confirming and measuring have been proposed, and by this technique, it is possible to realize fine depiction in the lumen, which is difficult with a general technique using echo or X-ray contrast.

US Patent Application Publication No. 2008/0009746

  However, the conventional technique for expanding a balloon has a problem that the flow of a body fluid such as blood is blocked because the balloon is in close contact with the lumen and always closes the lumen.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a lumen shape tracer that can depict the inside of a lumen while preventing blockage of bodily fluids.

  In order to achieve the above object, a lumen form tracer of the present invention is provided with a plurality of flexible elongated bodies and an open state extending radially from the elongated bodies, and the elongated body from the opened state to the elongated body. An opening / closing part that can be elastically deformed in a closed state that is tilted toward the X-ray, and an X-ray contrast-conducting wire having one end connected to the opening / closing part and the other end connected to the elongated body or the opening / closing part.

  According to the lumen form tracer according to the present invention configured as described above, the X-ray contrast-enhanced wire is pressed against the inside of the lumen while being supported by the opening and closing unit, and is deformed according to the shape inside the lumen. Since bodily fluids flow through the gaps that exist between the opening and closing parts, between the opening and closing part and the X-ray contrast-enhancing wires, and between the X-ray contrast-enhancing wires, the X-ray contrast inside the lumen is prevented while blocking the bodily fluids Can be described by

  In addition, if the length of the X-ray contrast-enhancing wire is longer than the length of the opening / closing portion, the X-ray contrast-enhancing wire can easily contact a wider area inside the lumen and be deformed according to the shape inside the lumen. Because it is easy, the inside of the lumen can be depicted widely and accurately.

  Further, if the bending rigidity of the X-ray contrast-enhancing wire is smaller than the bending rigidity of the opening / closing part, the deformation of the opening-closing part is suppressed, and the X-ray contrast-enhancing wire can be easily brought into close contact with the lumen. Can easily be deformed according to the shape inside the lumen, so that the inside of the lumen can be accurately depicted.

  In addition, if the X-ray contrast-enhancing wire is bent and bulged so as to protrude toward the distal end side of the elongated body or the proximal end side opposite to the distal end side in the open state, The procedure is easy because the X-ray contrast wire is brought into close contact with the inside of the lumen by simple movement of the body.

  In addition, the one end of the X-ray contrast-enhancing wire is connected to the distal end of the opening / closing part, and the X-ray contrast-enhancing wire is connected to the elongated body from the proximal end of the opening / closing part in the open state. If the bulge is bent so as to be convex in the direction toward the distal end of the opening / closing part, the X-ray contrast-enhanced wire portion that extends and bulges from the distal end of the opening / closing part in the open state in the lumen. Since the lumen is difficult to be touched by the tip of the opening / closing part, it is excellent in safety.

  Further, if the X-ray contrast-enhancing wire contains a superelastic alloy, it is easy to deform and has excellent recoverability, so that the inside of the lumen can be depicted repeatedly and accurately.

  Further, if the surface of the X-ray contrast-enhancing wire is formed by the coating of the X-ray contrast-enhancing metal, the X-ray contrast-enhancing property is achieved while taking advantage of the characteristics of the substrate coated with the X-ray contrast-enhancing metal. Can be granted.

  Further, if a lubricant is applied to the surface of at least one of the elongated body, the opening / closing portion, and the X-ray contrast-enhancing wire, the frictional resistance between these and the lumen is reduced. Therefore, introduction into the lumen is facilitated.

  In addition, the elongated body is provided with a flexible long cylindrical portion, and is provided coaxially within the cylindrical portion so that the flexible body can move forward and backward relative to the cylindrical portion. A long shaft-shaped portion, and the opening / closing portion is provided in each of the shaft-shaped portion and the cylindrical portion, and is connected to the opening / closing portion provided in the shaft-shaped portion. In the opened state, the X-ray contrast-enhancing wire is bulged and bent so as to protrude toward the proximal end opposite to the distal end side of the elongated body, and is provided in the cylindrical portion. If the other X-ray contrast-enhanced wire connected to the opening / closing part is swollen and bent so as to protrude toward the distal end side of the elongated body in the open state, one X-ray contrast Since the valve body and protrusions in the lumen are sandwiched between the control wire and other X-ray contrast-enhanced wires, the whole image of the valve body and protrusions It can be depicted more accurately.

It is a perspective view showing the whole lumen form tracer concerning a 1st embodiment with a guiding catheter. FIG. 3 is a perspective view of the distal end of a lumen-shaped tracer in a closed state, showing an enlarged view of a portion indicated by reference numeral 2 in FIG. 1. It is a perspective view which shows the lumen form tracer tip which concerns on 1st Embodiment in an open state. It is a mimetic diagram showing guidance to the aortic valve of the luminal form tracer concerning a 1st embodiment. It is a schematic diagram when the opening / closing part of the luminal tracer according to the first embodiment is opened near the aortic valve. It is a schematic diagram which shows the close_contact | adherence to the aortic valve of the X-ray contrastable wire which concerns on 1st Embodiment. It is a perspective view showing the whole lumen form tracer concerning a 2nd embodiment with a guiding catheter. FIG. 8 is a perspective view of the lumen-shaped tracer tip in a closed state, in which the lumen-shaped tracer tip is partially pushed out from the guiding catheter at a portion indicated by reference numeral 8 in FIG. 7. It is a perspective view which shows the luminal form tracer tip which concerns on 2nd Embodiment in an open state. It is a mimetic diagram showing guidance to an aortic valve of a lumen form tracer concerning a 2nd embodiment. It is a schematic diagram when the opening-and-closing part provided in the axial part of the luminal form tracer concerning a 2nd embodiment will be in an open state near an aortic valve. It is a mimetic diagram when the cylindrical part of the lumen form tracer concerning a guiding catheter and a 2nd embodiment is pulled back. It is a schematic diagram when the other X-ray contrast-conducting wire of the lumen form tracer which concerns on 2nd Embodiment will be in an open state in the vicinity of an aortic valve. It is a schematic diagram which shows contact | adherence to the aortic valve of one X-ray contrast enhancement wire and other X-ray contrast enhancement wires which concern on 2nd Embodiment. It is a perspective view which shows the lumen form tracer tip which concerns on 3rd Embodiment in an open state. It is a perspective view which shows the front-end | tip of the luminal form tracer which concerns on a modified example in an open state. It is a perspective view which shows the front-end | tip of the luminal form tracer which concerns on a modified example in an open state. It is a perspective view which shows the front-end | tip of the luminal form tracer which concerns on a modified example in an open state. It is a perspective view which shows the front-end | tip of the luminal form tracer which concerns on a modified example in an open state. It is a perspective view showing the tip of the lumen form tracer concerning a modification with a closed state.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that, in the embodiments described below, members having functions common to the embodiments are denoted by corresponding reference numerals, and redundant description is omitted. In addition, the dimensional ratios in the drawings are exaggerated for convenience of explanation and may be different from the actual ratios.

<First Embodiment>
As outlined in FIG. 1, the lumen shape tracer 10 according to the first embodiment is used by being inserted percutaneously into the lumen in order to depict the inside of the lumen by X-ray contrast. In form, it is used with a guiding catheter 15 to guide to the depiction position.

  The guiding catheter 15 has a substantially cylindrical shape and is flexible. The guiding catheter 15 is preferably made of a material having creep resistance, such as polyimide, polyethylene, polyamide, polyester, fluorine resin, or metal.

  The lumen shape tracer 10 has a flexible elongated body 100 as a main configuration, and is inserted into the guiding catheter 15 so as to be movable forward and backward. The elongated body 100 is preferably formed of a Ti—Ni alloy, but is not limited thereto, and can be formed of various materials suitable for moving in a lumen.

  The long body 100 has a solid circular cross section orthogonal to the axial direction, and the diameter thereof is preferably 1.2 mm to 4.5 mm. The long body 100 is longer than the guiding catheter 15, and the length of the long body 100 is preferably 1.2 m to 1.8 m.

  As shown in FIGS. 2 and 3, the lumen shape tracer 10 includes an opening / closing part 102 connected to the distal end of the long body 100 (the end of the long body 100 on the side inserted into the lumen). And an X-ray contrasting wire 104 having both ends connected to the opening / closing part 102.

  A plurality of the opening / closing portions 102 are provided in an open state extending radially from the long body 100 (see FIG. 3), and elastically deformed from the open state to a closed state (see FIG. 2) that falls toward the long body 100. Is possible.

  The opening / closing part 102 is preferably a Ti—Ni alloy, Ti—Ni—Fe alloy, Cu—Zn alloy, Cu—Zn—Al alloy, Cu—Al—Ni alloy, Cu—Au—Zn alloy. It is formed of a superelastic alloy such as an alloy, Cu—Sn alloy, Ni—Al alloy, Ag—Cd alloy, Au—Cd alloy, In—Ti alloy, In—Cd alloy. However, the material forming the opening / closing part 102 is not limited to these, and other materials that can be elastically deformed may be used.

  The length of the opening / closing part 102 is preferably 6 mm to 20 mm, and the diameter is preferably 0.1 mm to 0.5 mm. The opening / closing part 102 is connected to the elongated body 100 at one end by, for example, adhesive, pressure welding, heat welding, or laser welding, but is not limited to this, and a smooth change between a closed state and an open state is performed. It is possible to apply various connection methods that can be used and satisfy durability that can withstand such changes.

  When the distal end of the long body 100 is accommodated in the guiding catheter 15, the opening / closing part 102 is biased toward the long body 100 by the inner peripheral surface of the guiding catheter 15 to maintain the closed state. When the distal end of the scale 100 is pushed out from the guiding catheter 15 and the bias is released, the opening / closing part 102 is opened by its own elastic force.

  The X-ray contrast wire 104 has a configuration in which an X-ray contrast metal is coated on a superelastic alloy as exemplified above. Examples of the X-ray contrast-enhancing metal include tantalum, tungsten, gold, platinum, iridium and the like. The X-ray contrast-enhancing wire 104 is connected at one end to the radial tip of the opening / closing part 102 and is connected at the other end to the proximal end of the opening / closing part 102 connected to the elongated body 100. The X-ray contrast-enhancing wire 104 is connected to the opening / closing part 102 by, for example, an adhesive, pressure welding, heat welding, or laser welding, but is not limited thereto.

  The length of the X-ray contrast-enhancing wire 104 is longer than the length of the opening / closing part 102, and the length is preferably 18 mm to 60 mm. Further, the bending rigidity of the X-ray contrast wire 104 is smaller than the bending rigidity of the opening / closing part 102. As a specific example, the diameter of the X-ray contrast-enhancing wire 104 is smaller than the opening / closing part 102, and preferably the diameter of the X-ray contrast-enhancing wire 104 is 0.05 mm to 0.3 mm.

  In the closed state, the X-ray contrast-enhancing wire 104 is fit in the gap between the elongated body 100 and the guiding catheter 15. When in the open state, the X-ray contrast-enhanced wire 104 extends according to the opening and closing operation of the opening / closing part 102, and the proximal end side of the elongated body 100 opposite to the distal end side of the elongated body 100 by its own elastic force ( It is restored to a state of bulging and bending so as to be convex toward the side operated by the surgeon.

  A lubricant is applied to the surfaces of the long body 100, the opening / closing part 102, and the X-ray contrast-enhancing wire 104. Examples of the lubricant include silicone, PVP (polyvinyl pyrrolidone), PPO (polypropylene oxide), PEO (polyethylene oxide), methyl vinyl ether-maleic anhydride copolymer, dimethylacrylamide-glycidyl methacrylate copolymer, and the like. The thickness of the lubricant is preferably 1 to 10 μm.

  As a method for applying the lubricant, for example, a solution containing the lubricant is attached to the long body 100, the opening / closing part 102, and the X-ray contrast contrast wire 104 using a micro syringe pump, a micro dispenser, an ink jet, a spray, or the like. Thereafter, the organic solvent contained in the solution is vacuum-dried or heat-dried. In addition, the elongate body 100, the opening / closing part 102, and the X-ray contrast imaging wire 104 may be immersed in a solution containing a lubricant, and then the organic solvent contained in the solution may be vacuum-dried or heat-dried. .

  Next, a description will be given of a drawing method using the lumen shape tracer 10 by taking the drawing of the aortic valve AV shown in FIGS. 4 to 6 as an example.

  The drawing method includes a guiding step for guiding the distal end of the lumen shape tracer 10 to the drawing position, here the aortic valve AV, an opening / closing portion deployment step for opening the opening / closing portion 102 after the guiding step, and opening / closing portion deployment. After the step, there is a close contact step in which the X-ray contrast-enhanced wire 104 is in close contact with the aortic valve AV, and after the close contact step, a rendering step in which the form of the aortic valve AV is depicted by X-ray imaging.

  As shown in FIG. 4, in the guiding step, the distal end of the long body 100 is housed in the guiding catheter 15 and is percutaneously guided to the vicinity of the aortic valve AV through the aorta LA together with the guiding catheter 15. . Introduction of the guiding catheter 15 into the lumen is based on a conventionally known technique.

  As shown in FIG. 5, in the opening / closing part deployment step, the distal end of the long body 100 is pushed out from the guiding catheter 15, the opening / closing part 102 is opened, and the X-ray contrast-enhancing wire 104 is spread. In the present embodiment, the opening / closing part 102 is opened in the left ventricle LC that has passed through the aortic valve AV.

  Then, as shown in FIG. 6, in the contact process, the elongated body 100 is pulled back to the proximal end side, so that the X-ray contrast wire 104 is pressed against and closely contacts the aortic valve AV. Deforms to match the shape of the periphery.

  In the rendering process, the X-ray contrast-enhanced wire 104 is imaged with known X-rays while maintaining a state where the X-ray contrast wire 104 is in close contact with the aortic valve AV, and the shape of the annulus and its surroundings is depicted on a monitor (not shown). Is done.

  Next, the lumen shape tracer 10 made by the present inventors based on the above embodiment and a description experiment actually performed will be described.

  The inventors of the present invention have an opening / closing part 102 having a diameter of 0.21 mm and a length of 15 mm made of a Ti—Ni alloy, and having a diameter of 3.0 mm and a length made of a Ti—Ni alloy at the end thereof. Eighty pieces were connected to the tip of a 1.5 m long body 100 by laser welding. In connection, welding was performed so that the opening / closing part 102 spread radially in the same plane.

  The X-ray contrasting wire 104 is formed by coating tantalum on a Ti—Ni alloy, and has a diameter of 0.11 mm and a length of 45 mm. The X-ray contrast-enhancing wire 104 is connected to the distal end and the proximal end of the opening / closing part 102 by laser welding at both ends thereof. When connecting the X-ray contrast-enhancing wire 104 and the opening / closing part 102, the present inventors welded the X-ray-contrast-enhancing wire 104 so as to swell in an arc shape toward the proximal end side of the long body 100.

  And what was attached to the elongate body 100 with the opening-and-closing part 102 and the X-ray contrast contrast wire 104 was immersed in the solution containing silicone, Then, the organic solvent contained in the solution was vacuum-dried. This operation was repeated so that the thickness of the lubricant was 5 μm.

  The present inventors actually depicted the form of the aortic valve of sheep using the luminal form tracer 10 produced as described above. Prior to the guidance step to guide the luminal tracer 10, the inventors expanded the aortic valve by guiding the balloon to the aortic position of the sheep and expanding the balloon. Thereafter, in the guiding process, the lumen shape tracer 10 was guided to the aortic valve position. In the opening / closing part deployment step, the distal end of the elongated body 100 was pushed out from the guiding catheter 15 under the aortic valve that passed through the aortic valve from the aorta to open the opening / closing part 102. In the contact process, the elongated body 100 was pulled back, and the X-ray contrast-enhancing wire 104 was brought into close contact with the aortic valve AV.

  In the drawing process, images were taken from each direction of 360 °, analyzed by a computer, and drawn three-dimensionally on a monitor. As described above, the detailed form of the annulus and the periphery of the annulus is confirmed, and by performing quantitative coronary angiography (QCA) on this, accurate dimensions of the annulus and the periphery of the annulus are obtained. Was measured.

  After the measurement, the heart of the euthanized sheep was removed, and the shape and dimensions of the annulus of the aortic valve and the peripheral part of the annulus were visually observed and measured directly with the naked eye. It was almost the same as that of the contrasted image, and it was confirmed that the shape inside the lumen could be accurately depicted by the lumen shape tracer 10.

  The effect of the lumen shape tracer 10 according to the present embodiment will be described.

  According to the lumen shape tracer 10, the X-ray contrast-enhanced wire 104 is pressed against the aortic valve AV while being supported by the opening / closing part 102, deforms in accordance with the shape of the aortic valve AV, and between the opening / closing parts 102. Since the blood flows through the gap between the opening / closing part 102 and the X-ray contrast wire 104 and between the X-ray contrast wires 104, the form of the aortic valve AV is depicted by X-ray contrast while preventing the blood from being blocked. Can do.

  In addition, the length of the X-ray contrast wire 104 is longer than the length of the opening / closing portion 102, the X-ray contrast wire 104 is easy to contact a wider area of the aortic valve AV, and is deformed according to the shape of the aortic valve AV. Since it is easy, the aortic valve AV can be depicted widely and accurately.

  In addition, the bending rigidity of the X-ray contrast wire 104 is smaller than the bending rigidity of the opening / closing portion 102, the deformation of the opening / closing portion 102 is suppressed, and the X-ray contrast contrast wire 104 is easily brought into close contact with the aortic valve AV. Since the conductive wire 104 is easily deformed in accordance with the shape inside the lumen, the aortic valve AV can be accurately depicted.

  Further, the X-ray contrast-enhancing wire 104 bulges and bends so as to protrude toward the proximal end opposite to the distal end side of the long body 100, and the X-ray contrast is enhanced by a simple backward movement of the long body 100. Since the conductive wire 104 is in close contact with the aortic valve AV, the procedure is easy.

  Further, since the X-ray contrast-enhancing wire 104 is mainly formed of a superelastic alloy, and easily deforms and has excellent resilience, the aortic valve AV and other portions inside the lumen can be depicted repeatedly and accurately.

  Further, the surface of the X-ray contrast-enhancing wire 104 is formed by coating with an X-ray contrast-enhancing metal, and X-ray contrast can be imparted while taking advantage of the characteristics of the superelastic alloy coated with the X-ray contrast-enhancing metal. .

  In addition, a lubricant is applied to the surfaces of the long body 100, the opening / closing part 102, and the X-ray contrast wire 104, and the frictional resistance between these and the lumen and between these and the guiding catheter 15 is applied. Therefore, the introduction into the lumen becomes easy.

Second Embodiment
As shown in FIG. 7, in the lumen form tracer 20 according to the second embodiment, the configuration of the elongated body 200 is different from that of the first embodiment. The elongate body 200 is provided with a long cylindrical portion 220 having flexibility, and is provided coaxially within the cylindrical portion 220, and is flexible so as to be movable forward and backward relative to the cylindrical portion 220. And a long shaft-like portion 210. Opening / closing parts 212 and 222 are provided in the cylindrical part 220 and the shaft-like part 210, respectively.

  As shown in FIGS. 8 and 9, the opening / closing part 212 is provided at the tip of the shaft-like part 210, and the opening / closing part 222 is provided at the tip of the cylindrical part 220. The connection method between the opening / closing part 212 and the shaft-like part 210 and the connection method between the opening / closing part 222 and the tubular part 220 are described above as connection examples of the elongated body 100 and the opening / closing part 102 in the first embodiment. It is the same as that.

  A plurality of opening / closing parts 212 are provided in an open state extending radially from the shaft-like part 210 (see FIG. 9), and can be elastically deformed from an open state to a closed state falling toward the shaft-like part 210 (see FIG. 8). ). A plurality of opening / closing parts 222 are provided in an open state radially extending from the cylindrical part 220 (see FIG. 9), and can be elastically deformed from an open state to a closed state falling toward the cylindrical part 220 (see FIG. 8). ). The materials and dimensions of the opening / closing part 212 and the opening / closing part 222 are the same as those exemplified for the opening / closing part 102 of the first embodiment.

  When the tip of the shaft-shaped portion 210 is accommodated in the tubular portion 220, the opening / closing portion 212 is biased toward the shaft-shaped portion 210 by the inner peripheral surface of the tubular portion 220 to maintain the closed state. When the tip of the cylindrical portion 210 is pushed out of the cylindrical portion 220 and the bias is released, the opening / closing portion 212 is opened by its own elastic force.

  When the distal end of the tubular portion 220 is accommodated in the guiding catheter 25, the opening / closing portion 222 is urged toward the tubular portion 220 by the inner peripheral surface of the guiding catheter 25 to maintain the closed state. When the distal end of the shaped portion 220 is pushed out from the guiding catheter 25 and the bias is released, the opening / closing portion 222 is opened by its own elastic force.

  In the open state, one X-ray contrast wire 214 connected to the opening / closing part 212 swells and bends so as to protrude toward the base end side opposite to the distal end side of the long body 200. On the other hand, another X-ray contrast-enhanced wire 224 connected to the opening / closing part 222 is inflated and bent so as to protrude toward the distal end side of the long body 200 in the open state.

  The connection method between the opening / closing part 212 and one X-ray contrast-enhancing wire 214 and the connection method between the opening / closing part 222 and another X-ray contrast-enhancing wire 224 are the same as those in the first embodiment. This is the same as the above-mentioned example of connection with 104. The materials and dimensions of one X-ray contrast-enhancing wire 214 and other X-ray contrast-enhancing wires 224 are the same as those exemplified above for the X-ray contrast-enhancing wire 104 of the first embodiment.

  When the opening / closing part 212 is in the closed state, the X-ray contrast-enhanced wire 214 fits in the gap between the shaft-like part 210 and the tubular part 220, and when the opening-and-closing part 212 is in the open state, the X-ray contrast-enhancing wire 214 becomes While the opening / closing part 212 extends as it opens, it is restored to a bent state by its own elastic force so as to protrude toward the proximal end of the long body 200.

  When the opening / closing part 222 is in the closed state, the X-ray contrast-enhancing wire 224 fits in the gap between the tubular part 220 and the guiding catheter 25, and when the opening / closing part 222 is in the open state, the X-ray contrast-enhancing wire 224 becomes The opening / closing part 222 expands according to the opening operation, and by its own elastic force, it is restored to a bent and bent state toward the distal end side of the long body 200.

  As in the first embodiment, a lubricant is applied to the surfaces of the shaft portion 210, the cylindrical portion 220, the opening / closing portions 212 and 222, and the X-ray contrast contrast wires 214 and 224. Since the lubricant and the method of applying the lubricant are the same as those in the first embodiment, description thereof is omitted here.

  Next, in FIG. 10 to FIG. 14, a description method according to the second embodiment will be described. The depiction method according to the second embodiment includes substantially the same steps as those of the first embodiment, but has a difference based on the above configuration of the lumen shape tracer 20.

  As shown in FIG. 10, in the guiding step, the distal end of the shaft-shaped portion 210 is housed in the tubular portion 220, and the distal end of the tubular portion 220 is housed in the guiding catheter 25. The morphology tracer 20 is guided to the vicinity of the aortic valve AV together with the guiding catheter 25.

  As shown in FIGS. 11 to 13, in the opening / closing section unfolding step, the opening / closing sections 212 and 222 are opened in stages. First, as shown in FIG. 11, the distal end of the tubular portion 220 is pushed out of the tubular portion 220 while the distal end of the tubular portion 220 is housed in the guiding catheter 25, so that the opening / closing portion 212 is moved to the left ventricle. The open state is established in the LC and the X-ray contrast wire 214 is spread. Next, as shown in FIG. 12, the cylindrical portion 220 and the guiding catheter 25 are pulled back along the axial portion 210 while the position of the axial portion 210 is maintained. The tubular portion 220 and the guiding catheter 25 pass through the aortic valve AV and are pulled back to the aorta LA. Thereafter, as shown in FIG. 13, the distal end of the cylindrical portion 220 is pushed out from the guiding catheter 25, the opening / closing portion 222 is opened in the aorta LA, and the X-ray contrast-enhancing wire 224 is spread.

  Then, as shown in FIG. 14, in the contact step, the X-ray contrast-enhanced wire 214 is brought into close contact with the aortic valve AV from below by pulling back the shaft-shaped portion 210, and the tubular portion 220 is further pushed out to cause X-ray contrast Wire 224 is in close contact with aortic valve AV from above, and X-ray contrast wires 214 and 224 sandwich aortic valve AV. In the drawing process, the aortic valve AV is drawn by X-ray imaging while maintaining the state in which the X-ray contrast wires 214 and 224 are in close contact with and sandwich the aortic valve AV.

  As described above, the luminal tracer 20 according to the second embodiment sandwiches the aortic valve AV with the X-ray contrast wires 214 and 224, so that in addition to the effects of the first embodiment, the whole image of the aortic valve AV is obtained. The effect is that it can be described more accurately.

<Third Embodiment>
As shown in FIG. 15, the luminal tracer 30 according to the third embodiment is substantially the same as the luminal tracer 10 according to the first embodiment, but the distal end of the opening / closing part 302 and the X-ray contrasting wire 304. The shape of the connecting portion is different from that of the first embodiment.

  In the first embodiment, the X-ray contrast-enhancing wire 104 is connected so as to form an acute angle with respect to the tip of the opening / closing part 102 in the open state (see FIG. 3), but the tube according to the third embodiment. In the cavity shape tracer 30, in the open state, the X-ray contrast-conducting wire 304 swells and bends so as to protrude in the direction from the proximal end of the opening / closing part 302 toward the distal end of the opening / closing part 302 (reference numeral 306). reference.).

  With such a configuration, the portion 306 of the X-ray contrast wire 304 is in contact with the lumen, and the lumen is unlikely to be projected by the tip of the opening / closing portion 302. Therefore, the lumen shape tracer 30 according to the third embodiment is In addition to the effects of the embodiment, the safety is excellent.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims.

  For example, in the above embodiment, the X-ray contrast-enhancing wire is connected to the opening / closing part at both ends, but is not limited to this, and as shown in FIG. 16, one end is connected to the opening / closing part 402 and the other end is long. The scale 400 may be connected. In this example, the other end of the X-ray contrast-enhancing wire 404 is connected to the outer periphery of the long body 400 at a position separated from the tip of the long body 400.

  Moreover, in the said embodiment, although one X-ray contrast contrast wire is connected with respect to each opening / closing part, this invention is not limited to this, A several X-ray contrast contrast wire is with respect to each opening / closing part. It may be connected. For example, in the modification shown in FIG. 17, a plurality of X-ray contrast-enhancing wires 504 are connected to different positions of one opening / closing part 502 and are connected to different positions of the long body 500 along the axial direction. is doing. Further, in another modification shown in FIG. 18, a plurality of X-ray contrast contrast wires 604 are connected to different positions of one opening / closing part 602 and are connected to the base end of the opening / closing part 602. In still another modification shown in FIG. 19, a plurality of X-ray contrast wires 704 are connected so as to draw different arcs at the distal end and the proximal end of one opening / closing portion 702. Further, such a modification may be applied to the lumen shape tracer of the second embodiment or the third embodiment.

  In the above-described embodiment, the opening / closing portion is changed between the closed state and the open state by the guiding catheter. However, other configurations, for example, the axial direction provided at the distal end of the long body 800 as shown in FIG. The opening / closing part 802 may be opened and closed by a cap 801 that can be moved forward and backward.

  Moreover, the shape of the X-ray contrast-enhanced wire shown in the third embodiment may be applied to the embodiment of the second embodiment.

  The opening / closing part is not limited to the one provided at the tip of the long body, and may be provided separately from the tip of the long body.

  Although the present invention has been described above by taking the depiction of an aortic valve as an example, the present invention can be applied to depict various lumens such as arteries, veins, atriums, ventricles, bile ducts and the like.

10, 20, 30, 40, 50, 60, 70, 80 lumen form tracer,
15, 25, 35, 45, 55, 65, 75 guiding catheter,
100, 200, 300, 400, 500, 600, 700, 800 long body,
102, 302, 402, 502, 602, 702, 802 Opening / closing section,
104, 304, 404, 504, 604, 704, 804 X-ray contrast wire,
210 shaft part,
220 cylindrical part,
212, 222 Opening / closing section,
214 a radiographic wire,
224 other X-ray contrast wires,
AV aortic valve.

Claims (9)

A long body having flexibility;
A plurality of open states radially extending from the elongated body, and an opening / closing portion elastically deformable from the open state to a closed state falling toward the elongated body;
A lumen shape tracer having one end connected to the opening / closing part and the other end connected to the elongated body or the opening / closing part.   The lumen shape tracer according to claim 1, wherein a length of the X-ray contrast-enhancing wire is longer than a length of the opening / closing portion.   The lumen form tracer according to claim 1 or 2, wherein a bending rigidity of the X-ray contrast-enhancing wire is smaller than a bending rigidity of the opening / closing portion.   The X-ray contrast-enhancing wire is bulged and bent so as to be convex toward the distal end side of the elongated body or the proximal end side opposite to the distal end side in the open state. A luminal tracer according to any one of the preceding claims.   The one end of the X-ray contrasting wire is connected to a distal end of the opening / closing part, and the X-ray contrasting wire is connected to the opening / closing part from a proximal end of the opening / closing part connected to the elongated body in the open state. The luminal form tracer according to any one of claims 1 to 4, wherein the tracer is inflated and bent so as to be convex in a direction toward the tip of the tube.   The luminal form tracer according to claim 1, wherein the X-ray contrast-enhancing wire includes a superelastic alloy.   The lumen shape tracer according to any one of claims 1 to 6, wherein a surface of the X-ray contrast-enhancing wire is formed by a coating of an X-ray contrast-enhancing metal.   The lumen form according to any one of claims 1 to 7, wherein a lubricant is applied to a surface of at least one of the elongated body, the opening / closing portion, and the X-ray contrast-enhancing wire. Tracer.   The elongate body is a long tubular part having flexibility and a length that is provided coaxially within the tubular part and is flexible so as to be movable forward and backward relative to the tubular part. And the opening / closing part is provided in each of the shaft-like part and the cylindrical part, and is connected to the opening / closing part provided in the shaft-like part. In the open state, the X-ray contrast-enhancing wire is bulged and bent so as to protrude toward the proximal end opposite to the distal end side of the elongated body, and the opening / closing portion provided in the cylindrical portion The other X-ray contrast-enhanced wire connected to the wire is inflated and bent so as to protrude toward the distal end side of the elongated body in the open state. A luminal tracer according to claim 1.

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