WO2016136609A1 - ガイドワイヤ - Google Patents
ガイドワイヤ Download PDFInfo
- Publication number
- WO2016136609A1 WO2016136609A1 PCT/JP2016/054830 JP2016054830W WO2016136609A1 WO 2016136609 A1 WO2016136609 A1 WO 2016136609A1 JP 2016054830 W JP2016054830 W JP 2016054830W WO 2016136609 A1 WO2016136609 A1 WO 2016136609A1
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- WIPO (PCT)
- Prior art keywords
- coil
- wire
- guide wire
- core wire
- cross
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M2025/09058—Basic structures of guide wires
- A61M2025/09066—Basic structures of guide wires having a coil without a core possibly combined with a sheath
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M2025/09058—Basic structures of guide wires
- A61M2025/09083—Basic structures of guide wires having a coil around a core
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M2025/09108—Methods for making a guide wire
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M2025/09175—Guide wires having specific characteristics at the distal tip
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M2025/09191—Guide wires made of twisted wires
Definitions
- the present invention relates to a guide wire for guiding a medical tube such as a catheter to a predetermined position in a body lumen such as a blood vessel.
- medical tubes such as various catheters have been used in the medical field.
- a catheter in addition to inserting a catheter into a body lumen such as a blood vessel and injecting a drug solution or collecting blood or body fluid, treatment or examination can be performed with a device inserted into the body through such a catheter.
- catheters are also used for configuring blood and chemical fluid channels outside the body.
- a guide wire is generally used to insert such a catheter into a predetermined position of the body lumen. That is, before inserting the catheter, a guide wire is inserted in advance into a target body lumen, and then, for example, the catheter is extrapolated with respect to the guide wire. By inserting the catheter into the body in such a state, the catheter is guided by the guide wire and introduced into a predetermined position in the body lumen.
- guide wires include those described in Japanese Patent Application Laid-Open No. 2012-210292 (Patent Document 1) and Japanese Translation of PCT International Publication No. 2007-503256 (Patent Document 2).
- Patent Document 1 Japanese Patent Application Laid-Open No. 2012-210292
- Patent Document 2 Japanese Translation of PCT International Publication No. 2007-503256
- the core wire and the coil are formed as separate bodies. After the coil is extrapolated to the tip portion of the core wire, these predetermined positions are brazed to each other. It is manufactured by adhering.
- the guide wire generally has sufficient pushability on the proximal end side for insertion into the lumen, while the distal end side has sufficient flexibility for deformation following the bending or bending lumen. It is preferable to have.
- the guide wire described in Patent Document 2 since the coil is extrapolated to the distal end portion, the guide wire can be flexibly deformed in the direction orthogonal to the length direction. ing.
- the guide wire described in Patent Document 2 has a smaller diameter as the coil mounting portion of the core wire becomes the tip, and is flexibly deformed as the guide wire becomes the tip.
- the present invention has been made in the background as described above, and the problem to be solved is to improve the manufacturing efficiency and to generate a large step on the outer peripheral surface of the core wire. It is an object of the present invention to provide a guide wire having a novel structure that can be effectively prevented.
- Another problem to be solved by the present invention is to provide a guide wire having a novel structure in which the bending rigidity at the tip portion can be set more finely.
- the proximal end portion of the coil is integrally joined to the core wire when the coil is formed. It is characterized by this.
- the guide wire having the structure according to this aspect since the coil is formed in a state of being integrally joined to the core wire, the work of separately manufacturing and extrapolating the coil with respect to the core wire is omitted. Can be done. As a result, the guide wire manufacturing efficiency can be improved. Moreover, since the process of brazing and joining a coil with respect to a core wire, for example, is unnecessary, the generation of irregularities on the outer peripheral surface of the core wire accompanying at least brazing is effectively prevented, and the irregularities are provided. Can be kept small. Thereby, when the guide wire is inserted into the lumen, it can be effectively prevented from being caught on the lumen wall.
- the cross-sectional shape of the wire constituting the coil is different in the length direction of the coil.
- the bending rigidity of the coil can be changed by changing the cross-sectional shape of the coil wire material in the length direction.
- the bending rigidity can be set appropriately.
- the change in the cross-sectional shape of the coil wire material is affected by the bending rigidity of the tip end portion of the guide wire. Is effectively reflected. Therefore, by making the sectional shape of the coil wire different in the length direction, the bending rigidity of the tip portion of the guide wire can be set effectively and finely.
- the aspect in which the cross-sectional shape of the coil wire material is different in the present invention is not limited to that in which the cross-sectional shape of the coil wire material is different, but also includes a similar shape in which only the size is different.
- a third aspect of the present invention is the guide wire according to the first or second aspect, wherein a tip end portion of the core wire on which the coil is extrapolated is tapered.
- the bending rigidity of the core wire is also varied in the length direction.
- tip part of a guide wire can be set with a big freedom degree in consideration of the cross-sectional shape of both a core wire and a coil. That is, since it is possible to set each of the cross-sectional shapes of the coil wire and the core wire separately, the bending rigidity of the guide wire can be set more finely.
- the distal end portion of the core wire has a tapered shape, so that it can be flexibly deformed by reducing the bending rigidity on the distal end side, while it has good pushability by increasing the bending rigidity on the proximal end side.
- the mode of exhibiting can also be easily realized.
- the cross-sectional area of the wire constituting the coil is greater on the distal side than on the proximal side of the coil. Is something that has been made smaller.
- the bending rigidity on the distal end side of the coil can be reduced, while the bending rigidity on the proximal end side of the coil can be ensured largely.
- the cross-sectional areas of the coil wire and the core wire can be made smaller on the distal end side than on the proximal end side, and the distal end portion of the guide wire can be deformed more flexibly. It can be.
- the guide wire in the guide wire according to any one of the first to fourth aspects, at least a part of the coil in the length direction is located on the outer peripheral side end portion rather than the inner peripheral side end portion.
- the one is formed of a wire having a cross-sectional shape with a large width dimension.
- the guide wire having the structure according to this aspect by increasing the width of the outer peripheral side from the inner peripheral side in the cross section of the coil wire material, the area is reduced on the inner peripheral side and the deformation is easily realized. It is possible to reduce the contact resistance with the inner surface of the lumen by reducing the gap between the coil wires on the outer peripheral side. Further, on the inner circumference side of the coil, it may be designed such that the coil is more easily bent by increasing the gap between the adjacent coil wires to avoid contact interference at the time of coil bending deformation.
- a cross-sectional shape of the coil wire rod in this aspect for example, a triangle having a coil outer peripheral side as a base and a vertex on the coil inner peripheral side, or a trapezoid having a coil outer peripheral side as a lower base and an upper base on the coil inner peripheral side Etc. can be suitably employed.
- a sixth aspect of the present invention is the guide wire according to any one of the first to fifth aspects, wherein the outer diameter of the coil is substantially constant over the entire length.
- the guide wire structured according to this aspect when the guide wire is inserted into the lumen, the possibility of the coil being caught on the lumen wall is reduced, and the guide wire can be smoothly inserted.
- This aspect is advantageously realized by making the winding diameter (outer diameter) of the coil substantially constant over the entire length in the length direction of the coil.
- the outer diameter of the coil is smaller on the distal end side than on the proximal end side.
- the guide wire having the structure according to this aspect it is easy to set the bending rigidity of the coil so that the distal end side becomes smaller than the proximal end side. Therefore, the flexibility of the distal end portion of the guide wire can be further increased, and the guide wire can be easily deformed according to the bent portion of the lumen.
- An eighth aspect of the present invention is the guide wire according to any one of the first to seventh aspects, wherein a stepped portion is formed on the proximal end side of the mounting portion to which the coil is mounted in the core wire.
- the mounting portion located on the tip side of the stepped portion is reduced in diameter.
- the coil is mounted on the mounting portion having a smaller diameter on the tip side than the stepped portion, so that the core wire located on both sides of the stepped portion is sandwiched.
- the difference between the wire outer diameter in the coil non-mounting portion and the coil outer diameter in the coil mounting portion, that is, the substantial projecting dimension of the coil from the outer peripheral surface of the core wire can be suppressed.
- the difference in outer diameter between the mounting portion and the non-mounting portion located on both sides of the stepped portion of the core wire, that is, the step height of the stepped portion is substantially equal to the diameter of the coil wire.
- the substantial protrusion dimension of the coil from the outer peripheral surface of the core wire can be made sufficiently small, and the non-coil mounting portion and the coil mounting portion of the guide wire can be connected more smoothly on the outer peripheral surface.
- the material of the wire constituting the coil is different in the length direction of the coil. .
- the guide wire having the structure according to this aspect it is possible to design the deformation characteristics with a greater degree of freedom by changing the material of the coil wire.
- a coil that can be recognized under X-ray fluoroscopy can be realized by partially using a coil wire made of a material such as stainless steel as a material such as platinum that is partially X-ray opaque.
- the coil of this aspect may connect coils formed in advance with different materials by welding or the like. For example, a wire formed by electroforming is joined to a wire made of a different material simultaneously with the formation. May be. Further, when combined with the second aspect, there is no need for a correlation between the location where the cross-sectional shape changes and the location where the material changes in the length direction of the wire constituting the coil. .
- the wire constituting the coil is formed by at least one of electroforming and etching.
- a coil having a different cross-sectional shape of the winding wire in the length direction is formed by forming a wire wire having a different cross-sectional shape in the length direction by at least one of electroforming and etching, and winding the wire wire.
- the coil may be formed, or a coil having a shape in which a wire having a different cross-sectional shape in the length direction is wound with a predetermined winding diameter may be directly formed by at least one of electroforming and etching.
- the coil wire does not need to be formed by electroforming or etching over the entire length.
- the wire constituting the coil is formed by at least one of thermal spraying and vacuum deposition.
- the degree of freedom in selecting the material of the guide wire is improved.
- the guide wire can be formed of a material having a lower bending rigidity. It is. Thereby, the change of the bending rigidity in the length direction of a guide wire can be enlarged, and the setting of a finer bending rigidity is attained.
- the degree of freedom in setting the shape is increased as compared with the case where the coil is formed by cutting or the like, and a coil having a complicated shape can be efficiently and practically manufactured with high dimensional accuracy.
- the core wire and the coil are integrally formed, so that the manufacturing efficiency can be improved. Further, since the occurrence of a step due to brazing can be suppressed, the unevenness at the connecting portion between the core wire and the coil can be reduced.
- the bending rigidity at the distal end portion of the guide wire is obtained by making the cross-sectional shape of the coil attached to the distal end portion in the extrapolated state different in the length direction. Can be set finely.
- FIG. III-III sectional view in FIG. It is a figure which expands and shows the principal part in FIG. 3, (a) is a base end part of a coil, (b) is a longitudinal direction intermediate part of a coil, (c) shows the front-end
- FIGS. 1 to 3 show a guide wire 10 as an embodiment of the present invention.
- the guide wire 10 has a structure in which a coil 14 is externally attached to a distal end portion of a core wire 12 extending in a long shape.
- the guide wire 10 is inserted into the lumen prior to insertion into the lumen of the catheter or the like, so that the catheter or the like is guided to a predetermined position within the lumen when the catheter or the like is inserted. Yes.
- the axial direction refers to the left-right direction in FIG. 2 in which the guide wire 10 extends.
- the distal end side refers to the left side in FIG. 2 inserted into the lumen of the patient, while the proximal end side refers to the right side in FIG. 2 which is the side on which the user operates the guide wire 10.
- the core wire 12 is a small-diameter wire that extends in the axial direction as a whole, and includes a main body portion 16 and a mounting portion 18 located on the distal end side of the main body portion 16.
- the main body portion 16 and the mounting portion 18 are integrally formed, and the main body portion 16 continuously extends in the axial direction with a substantially constant outer diameter.
- the base end portion of the main body portion 16 may be provided with an operation portion having a large outer diameter so that the user can easily operate by gripping the core wire 12, that is, the guide wire 10.
- the surface of the main-body part 16 and the coil 14 may be coated with synthetic resins, such as PTFE.
- the mounting portion 18 has a radial dimension that is different in the axial direction, and has a tapered shape in which the outer diameter dimension gradually decreases toward the tip side.
- the mounting portion 18 preferably has a shape that becomes smaller in diameter toward the distal end side, but is not limited in any way.
- the mounting portion 18 may extend in the axial direction with a substantially constant outer diameter, or as it becomes closer to the distal end side. The diameter may be gradually reduced.
- the outer diameter dimension at the base end portion of the mounting portion 18 is smaller than the outer diameter size of the main body portion 16, and a stepped portion 19 is formed at the connection portion between the main body portion 16 and the mounting portion 18.
- an annular step surface 20 that extends in the direction perpendicular to the axis is formed.
- the tip chip 22 is fixed to the tip of the mounting portion 18 by welding or adhesion.
- the tip tip 22 has a solid, substantially hemispherical shape as a whole, and is attached so as to protrude toward the tip side.
- the core wire 12 is preferably formed of an elastic metal such as stainless steel.
- the main body portion 16 and the mounting portion 18 can be integrally formed, and can be suitably formed by forming the mounting portion 18 by cutting the tip portion using, for example, a long stainless steel wire.
- the main body portion 16 and the mounting portion 18 may be integrally formed by electroforming, or the mounting portion 18 formed by cutting or electroforming is fixed to the tip of the main body portion 16 made of wire. Also good.
- the coil 14 is extrapolated to the mounting portion 18 of the core wire 12.
- the coil 14 has a structure in which a coil wire 24 as a wire made of one small-diameter wire or the like is spirally wound, and the cross-sectional shape of the coil wire 24 is varied in the length direction. As a result, the cross-sectional shape of the coil 14 is also varied in the length direction.
- the length dimension of the coil 14 (the dimension in the left-right direction in FIG. 2) is substantially equal to the length dimension of the mounting portion 18 in the core wire 12.
- the cross-sectional shape of the coil wire 24a at the proximal end portion of the coil 14 is substantially rectangular, and in this embodiment, in particular, it is square.
- the cross-sectional shape of the coil wire 24b in the middle portion in the length direction of the coil 14 is circular (may be an ellipse).
- the cross-sectional shape of the coil wire 24c at the tip portion of the coil 14 is a substantially triangular shape. In particular, in the present embodiment, it is a substantially regular triangle. Thereby, the cross-sectional area of the coil wire 24 which comprises the coil 14 is made to become small in steps as it goes to a front end side from a base end side.
- the square height dimension Da (see FIG. 4A), which is the cross-sectional shape of the coil wire 24a at the proximal end portion of the coil 14, and the coil wire 24b at the intermediate portion in the longitudinal direction of the coil 14 are used.
- a circular diameter Db (see FIG. 4B) which is a cross-sectional shape of the coil 14 and a height Dc of a regular triangle which is a cross-sectional shape of the coil wire 24c at the tip portion of the coil 14 (see FIG. 4C).
- tip part is made into the chamfered round surface, and square or equilateral triangle which is each cross-sectional shape Each corner is rounded.
- the base of the triangle that is the cross-sectional shape of the coil wire 24 c is positioned on the outer peripheral surface of the coil 14, and the apex is positioned on the inner peripheral end of the coil 14.
- the length direction dimension Eo (see FIG. 4C) of the coil outer peripheral end portion of the coil wire 24c and the length direction dimension Ei of the coil inner peripheral end portion (see FIG. 4 (c))
- the length dimension Ei of the inner peripheral end is substantially the minimum (0).
- the length direction dimension Eo of the outer peripheral end is made larger.
- the wires abut or approach each other in the length direction on the outer peripheral side of the coil 14, while a relatively large gap 26 between the adjacent wires in the length direction faces the inner peripheral side on the inner peripheral side of the coil 14. It is formed by expanding.
- the coil 14 is formed by, for example, winding the coil wire 24 having different cross-sectional shapes in the length direction as described above in a spiral manner around the core rod, removing the core rod, and quenching as necessary. It can be formed by a known coil manufacturing method such as post-processing such as. In the present embodiment, the outer diameter dimension (winding diameter) of the coil 14 is substantially constant over substantially the entire length in the length direction.
- the coil wire 24 is formed of a metal such as stainless steel, and can be formed by cutting a stainless steel wire or electroforming.
- the coil wire 24 may be formed of a single wire, but a base end portion 24a having a substantially square cross section, an intermediate portion 24b having a circular cross section, and a substantially equilateral triangle cross section.
- the tip portion 24c thus formed may be connected to each other by means such as welding before or after being wound into a coil.
- the material of the coil wire 24 may be different in the length direction.
- a portion such as the tip of the coil wire 24 may be formed of a member such as platinum showing radiopacity over a predetermined length.
- the part formed with platinum in the coil wire 24 and the part formed with stainless steel may be connected by welding etc., and these may be integrally formed by electroforming.
- the material of the coil 14 is made different in the length direction, and, for example, by integrally forming a portion that can be seen under X-ray fluoroscopy, it is possible to save the trouble of mounting a marker such as platinum after the coil is formed. be able to.
- a correlation is not required between the location where the cross-sectional shape changes in the coil wire and the location where the material changes in the coil wire.
- the guide wire 10 of the present embodiment is configured by extrapolating the coil 14 having the above-described shape to the mounting portion 18 of the core wire 12 and attaching the tip tip 22 to the tip of the mounting portion 18. ing. At this time, the core wire 12 and the base end of the coil 14 are fixed to each other at the stepped surface 20 of the core wire 12 and the base end portion of the mounting portion 18 by welding or bonding, and the base end of the tip tip 22 and the tip end of the coil 14 are connected. It is preferable to fix by welding or adhesion.
- the dimension of the step surface 20 in the height direction (vertical direction in FIG. 3) and the height dimension Da of the coil wire 24a at the base end portion of the coil 14 are substantially equal.
- the outer diameter of the main body portion 16 located on the proximal side in the wire length direction from the step-shaped portion 19 and the outer diameter (winding diameter) of the coil 14 are made substantially equal, and the outer periphery from the main body portion 16 to the coil 14 The surfaces are connected with almost no steps.
- the coil 14 also has a coil winding diameter (coil outer diameter) that is substantially constant over the entire length in the length direction from the proximal end portion to the intermediate portion and further to the distal end portion.
- the coil 14 is bent and deformed together with the tip portion of the core wire 12 when the tip portion of the guide wire 10 is bent and deformed.
- the coil 14 can sufficiently affect the curve deformation characteristics of the guide wire 10 while flexibly responding to the curve deformation of the guide wire 10.
- the deformation of the coil 14 is mainly caused by the torsional deformation of the coil wire 24, the cross-sectional secondary pole moment and the like are appropriately adjusted by adjusting the cross-sectional shape of the coil wire 24 and the like.
- the elastic deformation characteristics of the coil 14 can be designed.
- the coil wire 24 is made to have the cross-sectional shape different in the length direction, thereby finely adjusting the bending deformation characteristics at the coil 14 and thus the distal end portion of the guide wire 10 to the required characteristics. It becomes possible to do.
- the mounting portion 18 of the core wire 12 is tapered so that the secondary moment of section is made different in the axial direction, and the bending rigidity of the core wire 12 is also reduced as it goes to the distal end side. Therefore, the bending rigidity at the distal end portion of the guide wire 10 can be adjusted and set more finely by combining both the core wire 12 and the coil 14.
- the mounting portion 18 has a tapered shape, so that the cross-sectional secondary moment is changed in the length direction, and the cross-sectional area of the coil wire 24 is on the distal side compared to the proximal side. Since the cross-sectional secondary pole moment is changed in the length direction by reducing the length of the guide wire 10, the guide wire 10 has a bending rigidity on the distal end side as compared with that on the proximal end side. Is sufficiently small, and the distal end of the guide wire 10 can easily follow and deform with respect to the lumen in which the distal end of the guide wire 10 bends, and good pushability with respect to the guide wire 10 can also be exhibited.
- the cross section of the coil wire 24c at the tip portion of the coil 14 is a substantially triangular shape having a vertex on the inner peripheral side of the coil 14, and the adjacent coil wire 24c faces the inner peripheral side.
- a gap 26 having a cross-sectional shape that gradually expands is set. Therefore, on the outer peripheral surface of the coil 14, the bottom side of the coil wire 24 c is positioned, and the unevenness and gaps on the outer peripheral surface of the coil 14 are reduced, so that the contact resistance to the inner surface of the lumen is suppressed. Further, on the inner peripheral surface of the coil 14, interference between adjacent coil wires 24 c at the time of bending deformation of the coil 14 can be reduced by the gap 26 set between them.
- the winding diameter (coil outer diameter) of the coil wire 24 in the coil 14 is substantially constant over the entire length in the length direction, and is closer to the base end side than the step surface 20 of the core wire 12. Since the outer diameter is substantially the same as the outer diameter of the coil, the guide wire 10 can be more effectively avoided from being caught in a lumen such as a blood vessel.
- the cross-sectional shape of the coil wire 24a at the proximal end portion of the coil 14 is substantially square, and the cross-sectional shape of the coil wire 24b at the intermediate portion of the coil 14 is circular.
- the cross-sectional shape of the coil wire 24a at the tip portion is substantially equilateral triangle, it is not limited to such a cross-sectional shape. That is, the cross-sectional shape of the coil wire is not limited in any way, as long as the cross-sectional shape changes stepwise or continuously in the length direction of the coil and differs in at least a part of the length direction of the coil. Good.
- the fact that the cross-sectional shape of the coil wire is different includes that the outer shape is similar and the size is different. Therefore, it is possible to adopt a mode in which the cross-sectional shape of the coil is a circular cross section over the entire length from the base end side to the tip end side, and the outer diameter dimension is gradually reduced stepwise or stepwise.
- the coil wire 24 is spirally wound around the core rod to form the coil 14.
- the present invention is not limited to this mode. That is, as shown in FIG. 5, the coil may be formed by electroforming or etching in a spirally wound state. Specifically, first, a non-conductive sacrificial material 28 as shown in FIG. Then, a metal paste is applied to the surface of the sacrificial material 28 in a spiral shape corresponding to the desired coil shape, and electroforming is performed, so that the outer diameter dimension as shown in FIG. 5B is substantially constant. These coils are formed on the outer peripheral surface of the sacrificial material 28.
- non-conductive masking is performed so as to partially cover the outer peripheral surface of the coil (a gray portion on the left half in FIG. 5C), and further electroforming is performed, so that FIG. As shown in FIG. 5, only the portion not masked (the substantially half portion on the right in FIG. 5C) is formed by thickening the coil wire by electroforming.
- the coil 30 is soaked in a solvent to dissolve the sacrificial material 28, and the mask 30 is removed to obtain a coil 30 made of a coil wire having a different cross-sectional shape in the length direction. Therefore, the coil 30 obtained in this way is extrapolated to the mounting portion (18) and the tip 22 is fixed to the tip of the mounting portion (18) in the same manner as in the above embodiment, so that FIG.
- the guide wire 32 shown in d) can be manufactured.
- the sacrificial material 28 shown in FIG. 5 (a) has a pipe shape and is not limited as long as it is a material that can be dissolved by a solvent.
- ABS resin polycarbonate resin, urethane resin, acrylic resin It can be suitably formed by a resin or the like.
- a metal paste spirally applied to the surface of the sacrificial material 28 for example, a paste of platinum, gold, silver or copper, and a mixture thereof can be suitably employed.
- the target coil 30 can be manufactured with the coil wire which consists of platinum, gold
- the base end side coil is formed with a masking material.
- a coil made of a coil wire whose material is different in the length direction can also be formed by electroforming.
- the end portion of the coil formed by electroforming is electroformed with respect to the end portion of the coil wire previously formed by electroforming. It is also possible to join at the same time as forming by casting.
- the outer diameter dimension of the proximal end portion of the coil 30 whose outer diameter dimension is increased and the distal end portion of the main body portion 16 of the core wire 12 are substantially equal.
- the outer diameter of the tip 22 may be matched to the coil diameter of the tip side portion of the coil 30 having a reduced winding diameter.
- the outer diameter dimension of the coil which comprises the guide wire which concerns on this invention may be varied in the length direction, as FIG.5 (d) shows. In particular, by setting the distal end side to be smaller in diameter than the proximal end side, it is possible to reduce the bending rigidity on the distal end side of the guide wire and to exhibit good pushability.
- the cross-sectional shape of the coil wire 24c at the tip portion of the coil 14 is substantially triangular and the apex angle is directed toward the inner peripheral side, so that the coil 14 is directed toward the inner peripheral side.
- the gap 26 that expands is formed between the adjacent coil wires 24c.
- a gap that expands toward the outer peripheral side of the coil is formed so that the apex angle faces the outer peripheral side.
- the cross-sectional shape of the coil does not need to be a triangle, and the cross-sectional shape of the coil may be a trapezoid, a rhombus, a circle, or an ellipse, for example.
- a gap can be formed on at least one of the inner peripheral side and the outer peripheral side of the coil if the lengthwise dimension is at least one of the inner peripheral side and the outer peripheral side.
- a step is formed between the main body portion and the mounting portion in the core wire.
- the difference in outer diameter between the core wire and the coil is suppressed, and problems due to the outer diameter difference are reduced.
- the outer diameter dimensions of the base ends of the core wire main body portion and the mounting portion may be substantially equal. In such a case, a step having a height dimension of approximately 0 is between the core wire main body portion and the mounting portion. It can be grasped as being provided.
- the coil 14 is fixed to the core wire 12.
- the coil is integrally formed with the core wire, for example, by electroforming. May be fixed.
- the surface of the core wire prepared in advance is covered with a non-conductive masking material or a sacrificial material, and only the outer peripheral surface of the proximal end portion close to the stepped surface of the mounting portion is exposed to form a bonding surface.
- a metal paste is applied to the outer peripheral surface of the masking material and the sacrificial material covering the outer peripheral surface of the core wire mounting portion so as to spirally extend from the joint surface to the tip, thereby forming an electroformed surface.
- the electroformed surface is electroformed to form a coil by electroforming, and then the masking material and the sacrificial material are removed to obtain a coil extrapolated to the core wire mounting portion.
- the coil thus obtained can be bonded to the core wire bonding surface at the proximal end side while being fixed at the same time as the formation, and therefore, the coil is bonded to the core wire. Special processing such as brazing may be unnecessary.
- the base end side is joined by being extrapolated to the core wire.
- the coil thus obtained can be obtained simultaneously with its formation.
- the sacrificial material 28 shown in FIG. 5A is shortened by a predetermined length on the base end side, and is joined to the base end side outer peripheral surface of the core wire mounting portion. Will be provided. Also, when the coil is formed on the outer peripheral surface of the mounting portion in the presence of the core wire in this way by electroforming or the like, and the base end portion is integrally fixed to the core wire at the same time as the formation of the coil, for example, a step is formed on the core wire.
- brazing is not required and projection of the brazed portion to the outer peripheral surface of the core wire is avoided, so that the core wire is compared with the structure in which the proximal end portion of the coil is brazed to the core wire. It becomes possible to suppress the protrusion amount to the outer peripheral surface.
- the bonding between the core wire and the coil is performed, for example, by bonding the exposed end faces of both members in the presence of both the members and covering the two members with a masking material. It is also possible to perform this joint by forming it by electroforming in a later step.
- the tip provided at the tip of the core wire is formed integrally with the core wire in addition to post-fixing the tip tip formed separately from the core wire when the coil is formed by electroforming, for example. It is also possible to use a tip.
- FIG. 5 shows an example in which the coil 30 is formed by electroforming. In the present invention, instead of electroforming, etching is employed, or by combining electroforming and etching, the coil or coil is formed. It is also possible to form a wire constituting the.
- the coil or the wire constituting the coil is formed by spraying or vacuum deposition, which is known as a forming technique such as film formation, in the same manner as electroforming, instead of electroforming or etching, or in combination with electroforming or etching. May be. That is, for example, a coil or a wire constituting the coil is formed by integrating a large number of sprayed particles of a material that has been melted by heating or a material close to it into a predetermined shape, or vaporized or sublimated by heating. It is also possible to form a coil or a wire constituting the coil by integrating many of the material particles into a predetermined shape.
- the degree of freedom in selecting the material of the guide wire can be improved as compared with a guide wire formed by electroforming or the like. Therefore, by adopting a material with low rigidity, it is possible to further reduce the bending rigidity of the guide wire, and accordingly, the bending change amount of the guide wire can be increased and the length direction of the guide wire can be increased.
- the bending rigidity can be set more finely.
- the guide wire 10 is made of metal.
- the guide wire can be made of, for example, a synthetic resin or a ceramic by being formed by thermal spraying or vacuum deposition.
- each aspect of the guide wire described below can be recognized as an independent invention that can solve a problem different from the present invention.
- the first aspect is a guide wire in which a coil is extrapolated and attached to the distal end portion of the core wire, and in the core wire, a stepped portion is formed on the base end side of the attachment portion to which the coil is attached.
- the mounting portion located on the tip side of the step-shaped portion is reduced in diameter.
- the second aspect is the guide wire according to the first aspect, wherein the base end portion of the coil is integrally joined to the core wire when the coil is formed.
- a third aspect is the guide wire according to the first or second aspect, wherein the cross-sectional shape of the wire constituting the coil is different in the length direction of the coil.
- a fourth aspect is a guide wire according to any one of the first to third aspects, wherein a tip end portion of the core wire on which the coil is extrapolated is tapered.
- the cross-sectional area of the wire constituting the coil is smaller on the distal end side than on the proximal end side of the coil. It is what has been.
- a sixth aspect is the guide wire according to any one of the first to fifth aspects, wherein at least a part of the coil in the length direction is closer to the outer peripheral end than the inner peripheral end. Is formed of a wire having a cross-sectional shape with a large width dimension.
- the seventh aspect is the guide wire according to any one of the first to sixth aspects, wherein the outer diameter of the coil is substantially constant over the entire length.
- the eighth aspect is the guide wire according to any one of the first to sixth aspects, wherein the outer diameter of the coil is smaller on the distal end side than on the proximal end side.
- the material of the wire constituting the coil is different in the length direction of the coil.
- a tenth aspect is the guide wire according to any one of the first to ninth aspects, wherein the wire constituting the coil is formed by at least one of electroforming and etching.
- the wire constituting the coil is formed by at least one of thermal spraying and vacuum deposition.
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Abstract
Description
Claims (11)
- コアワイヤの先端部分にコイルが外挿装着されたガイドワイヤにおいて、
前記コイルの基端部が、該コイルの形成に際して前記コアワイヤに対して一体的に接合されていることを特徴とするガイドワイヤ。 - コアワイヤの先端部分にコイルが外挿装着されたガイドワイヤにおいて、
前記コイルを構成する線材の断面形状が、該コイルの長さ方向で異なっていることを特徴とするガイドワイヤ。 - 前記コイルが外挿装着された前記コアワイヤの先端部分が先細のテーパ形状とされている請求項1又は2に記載のガイドワイヤ。
- 前記コイルを構成する線材の断面積が、該コイルの基端側に比べて先端側の方が小さくされている請求項1~3の何れか1項に記載のガイドワイヤ。
- 前記コイルの長さ方向の少なくとも一部が、内周側端部よりも外周側端部の方が幅寸法の大きい断面形状を有する線材で形成されている請求項1~4の何れか1項に記載のガイドワイヤ。
- 前記コイルの外径寸法が全長に亘って略一定とされている請求項1~5の何れか1項に記載のガイドワイヤ。
- 前記コイルの外径寸法が、基端側に比べて先端側が小さくされている請求項1~5の何れか1項に記載のガイドワイヤ。
- 前記コアワイヤにおいて、前記コイルが装着される装着部の基端側に段差状部が形成されており、該段差状部よりも先端側に位置する該装着部が小径化されている請求項1~7の何れか1項に記載のガイドワイヤ。
- 前記コイルの長さ方向において、該コイルを構成する線材の材質が異ならされている請求項1~8の何れか1項に記載のガイドワイヤ。
- 前記コイルを構成する線材が電鋳とエッチングとの少なくとも一方により形成されている請求項1~9の何れか1項に記載のガイドワイヤ。
- 前記コイルを構成する線材が溶射と真空蒸着との少なくとも一方により形成されている請求項1~9の何れか1項に記載のガイドワイヤ。
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JP2017502318A JP6768224B2 (ja) | 2015-02-27 | 2016-02-19 | ガイドワイヤ |
EP16755355.1A EP3263170B1 (en) | 2015-02-27 | 2016-02-19 | Guide wire |
US15/544,946 US10987493B2 (en) | 2015-02-27 | 2016-02-19 | Guide wire |
CN201680007778.2A CN107206216B (zh) | 2015-02-27 | 2016-02-19 | 导丝 |
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JP2015096232 | 2015-05-11 |
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PCT/JP2016/054830 WO2016136609A1 (ja) | 2015-02-27 | 2016-02-19 | ガイドワイヤ |
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EP (1) | EP3263170B1 (ja) |
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US10232141B2 (en) | 2008-12-08 | 2019-03-19 | Scientia Vascular, Llc | Micro-cutting systems for forming cuts in products |
US10363389B2 (en) | 2009-04-03 | 2019-07-30 | Scientia Vascular, Llc | Micro-fabricated guidewire devices having varying diameters |
US10821268B2 (en) | 2016-09-14 | 2020-11-03 | Scientia Vascular, Llc | Integrated coil vascular devices |
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US11369351B2 (en) | 2017-05-26 | 2022-06-28 | Scientia Vascular, Inc. | Micro-fabricated medical device having a non-helical cut arrangement |
US11406791B2 (en) | 2009-04-03 | 2022-08-09 | Scientia Vascular, Inc. | Micro-fabricated guidewire devices having varying diameters |
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US10232141B2 (en) | 2008-12-08 | 2019-03-19 | Scientia Vascular, Llc | Micro-cutting systems for forming cuts in products |
US10363389B2 (en) | 2009-04-03 | 2019-07-30 | Scientia Vascular, Llc | Micro-fabricated guidewire devices having varying diameters |
US11406791B2 (en) | 2009-04-03 | 2022-08-09 | Scientia Vascular, Inc. | Micro-fabricated guidewire devices having varying diameters |
US9950137B2 (en) | 2009-04-03 | 2018-04-24 | Scientia Vascular, Llc | Micro-fabricated guidewire devices formed with hybrid materials |
US11207502B2 (en) | 2016-07-18 | 2021-12-28 | Scientia Vascular, Llc | Guidewire devices having shapeable tips and bypass cuts |
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US11052228B2 (en) | 2016-07-18 | 2021-07-06 | Scientia Vascular, Llc | Guidewire devices having shapeable tips and bypass cuts |
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US11452541B2 (en) | 2016-12-22 | 2022-09-27 | Scientia Vascular, Inc. | Intravascular device having a selectively deflectable tip |
US11369351B2 (en) | 2017-05-26 | 2022-06-28 | Scientia Vascular, Inc. | Micro-fabricated medical device having a non-helical cut arrangement |
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Also Published As
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CN107206216A (zh) | 2017-09-26 |
CN107206216B (zh) | 2020-11-06 |
US10987493B2 (en) | 2021-04-27 |
EP3263170B1 (en) | 2021-05-19 |
EP3263170A4 (en) | 2018-10-24 |
JP6768224B2 (ja) | 2020-10-14 |
JPWO2016136609A1 (ja) | 2017-12-07 |
EP3263170A1 (en) | 2018-01-03 |
US20180015260A1 (en) | 2018-01-18 |
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