WO2019082327A1 - Kit de dilatateur et dilatateur - Google Patents

Kit de dilatateur et dilatateur

Info

Publication number
WO2019082327A1
WO2019082327A1 PCT/JP2017/038653 JP2017038653W WO2019082327A1 WO 2019082327 A1 WO2019082327 A1 WO 2019082327A1 JP 2017038653 W JP2017038653 W JP 2017038653W WO 2019082327 A1 WO2019082327 A1 WO 2019082327A1
Authority
WO
WIPO (PCT)
Prior art keywords
dilator
catheter
tubular member
mandrel
flared
Prior art date
Application number
PCT/JP2017/038653
Other languages
English (en)
Japanese (ja)
Inventor
竜彦 梶井
Original Assignee
朝日インテック株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 朝日インテック株式会社 filed Critical 朝日インテック株式会社
Priority to JP2019549765A priority Critical patent/JP6900499B2/ja
Priority to PCT/JP2017/038653 priority patent/WO2019082327A1/fr
Publication of WO2019082327A1 publication Critical patent/WO2019082327A1/fr

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Classifications

    • 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
    • A61M29/00—Dilators with or without means for introducing media, e.g. remedies
    • 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
    • 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
    • A61M25/06—Body-piercing guide needles or the like

Definitions

  • the present invention relates to a dilator and a dilator kit for use in inserting a catheter into a lumen such as a blood vessel of a patient.
  • Patent Document 1 describes a method of directly inserting the above-described catheter into a blood vessel of a patient (see FIG 10A to FIG 10K and the like of Patent Document 1).
  • the body surface of a patient is punctured with a puncture needle, and then a guide wire is inserted into the blood vessel of the patient through the lumen of the puncture needle.
  • the catheter assembly consisting of the catheter and the dilator is allowed to enter the patient's blood vessel along the guide wire with the tip of the dilator protruding from the tip of the catheter ( FIG. 10D to FIG. 10F) and then the guide wire and the dilator are removed from the catheter to complete the insertion of the catheter into the patient's blood vessel.
  • the tip of the dilator is tapered so that it can be easily inserted into the body surface of the patient
  • the dilator described in Patent Document 1 has a catheter assembly that has a fixed shape. There is a problem that further resistance occurs when inserting the catheter into the patient's body surface, making it difficult to insert the catheter assembly into the patient's body surface.
  • the outer diameter of the dilator needs to be as close as possible to the inner diameter of the catheter, but in that case, it becomes difficult to insert the dilator into the lumen of the catheter There was a problem.
  • the present invention addresses the above-mentioned problems of the prior art and facilitates the insertion of a dilator into the lumen of a catheter and the insertion of a catheter into a lumen of a patient's blood vessel or the like. Therefore, it is an object of the present invention to provide a dilator and dilator kit which can easily expand the puncture hole.
  • the tubular member and the distal end are joined to the distal end of the tubular member and are separated from the outer periphery of the tubular member from the distal end to the proximal end. And a flared portion having an enlarged diameter.
  • a slit is formed in the flare portion from the proximal end toward the distal end side.
  • a through hole is formed in the flare portion.
  • the dilator kit according to the fourth aspect of the present invention the dilator according to any one of the first to third aspects, a lumen into which the tubular member can be inserted, and a space between the tubular member and the flared portion. And a mandrel having an insertable tip portion.
  • a fifth aspect of the present invention is characterized in that, in the dilator kit according to the fourth aspect, the flared portion and the tip portion of the mandrel have a wedge shape in a longitudinal sectional view.
  • the sixth aspect of the present invention is the dilator kit according to the fourth or fifth aspect, further comprising a catheter into which the dilator and the mandrel can be inserted, wherein the outer diameter at the proximal end of the flared part is the above
  • the catheter Smaller than the inner diameter of
  • the dilator and the catheter into which the mandrel can be inserted comprising the catheter at the proximal end of the flared part
  • the outer diameter is equal to or larger than the outer diameter of the catheter by inserting the mandrel between the tubular member and the flared portion, and the mandrel is separated from between the tubular member and the flared portion. , Smaller than the inner diameter of the catheter.
  • the dilator of the first aspect of the present invention comprises: a tubular member; and a flared portion whose distal end is joined to the distal end of the tubular member and is separated from the outer periphery of the tubular member from the distal end to the proximal end.
  • the puncture hole can be easily expanded to facilitate insertion of the dilator into the lumen of the catheter and to facilitate insertion of the catheter into the lumen of a patient's blood vessel or the like.
  • the flare portion is formed with a slit from the proximal end toward the distal end side, so the dilator of the first aspect.
  • the flare portion By making the outer diameter of the catheter easy to reduce, the insertion into the lumen of the catheter becomes easier, and by making the outer diameter of the flare part easy to enlarge, the puncture hole can be easily expanded. can do.
  • the dilator kit of the fourth aspect of the present invention the dilator according to any one of the first to third aspects, the lumen into which the tubular member can be inserted, the space between the tubular member and the flare portion And a mandrel having an insertable tip portion, whereby the outer diameter of the flared portion can be easily expanded by the mandrel and the puncture hole for inserting the catheter into the blood vessel can be expanded more easily.
  • the dilator kit of the fifth aspect of the present invention in the dilator kit of the fourth aspect, since the flare portion and the tip of the mandrel have a wedge shape in a longitudinal sectional view, the dilator kit of the fourth aspect In addition to the effect, the puncture hole for inserting the catheter into the blood vessel can be more easily expanded.
  • the dilator and the catheter capable of inserting the mandrel are provided, and the outer diameter at the proximal end of the flare portion is The mandrel is inserted between the tubular member and the flared part to be larger than the inner diameter of the catheter, and the mandrel is separated from the tubular member and the flared part to be smaller than the inner diameter of the catheter Therefore, in addition to the effects of the dilator kit according to the fourth or fifth aspect, the dilator can be more easily inserted into the lumen of the catheter, and the puncture hole for inserting the catheter into the blood vessel can be more easily expanded. Can.
  • the outer diameter at the end is equal to or greater than the outer diameter of the catheter by inserting the mandrel between the tubular member and the flared portion, and the inner diameter of the catheter by disengaging the mandrel from between the tubular member and the flared portion.
  • the puncture hole for inserting a catheter into a blood vessel can be more easily expanded and expanded because it is smaller than the above. The catheter can be more easily inserted into the blood vessel from the puncture hole.
  • a mandrel is a longitudinal cross-sectional view before mounting
  • a mandrel is a longitudinal cross-sectional view after mounting to a dilator.
  • a mandrel is a longitudinal cross-sectional view before mounting
  • a mandrel is a longitudinal cross-sectional view after mounting to a dilator.
  • FIG. 1 is a schematic perspective view of a dilator according to a first embodiment of the present invention
  • FIG. 2 is a longitudinal sectional view of the dilator according to the first embodiment.
  • the dilator 1 of the present embodiment is composed of a tubular member 3 and a flared portion 5 joined to the tip of the tubular member 3.
  • the tubular member 3 is a hollow cylindrical member having a lumen 7 for inserting a guide wire or the like therein, and is a long flexible member. An opening 6 is formed at the tip of the tubular member 3.
  • the material of the tubular member 3 is not particularly limited.
  • the material of the tubular member 3 include polyvinyl chloride resin, urethane resin such as polyurethane, polyolefin resin such as polyethylene, polypropylene and ethylene-propylene copolymer, fluorocarbon resin such as polyamide resin and polytetrafluoroethylene, ethylene-
  • various synthetic resin materials such as thermoplastic elastomers, such as a vinyl acetate copolymer and polyester elastomer, can be mentioned, a polyester elastomer is used in this embodiment.
  • the flared portion 5 has a distal end 4 joined to the distal end of the tubular member 3 and is conically expanded in diameter from the distal end 4 toward the proximal end 2 so as to be gradually separated from the outer periphery of the tubular member 3. Further, between the tubular member 3 and the flare portion 5, a gap 9 having a wedge shape in longitudinal section is formed from the tip to the proximal end.
  • the material of the flare portion 5 is not particularly limited as long as it is an elastic body.
  • the material of the flare portion 5 is, for example, a polyvinyl chloride resin, a urethane resin such as polyurethane, a polyolefin resin such as polyethylene, polypropylene or ethylene-propylene copolymer, a polyamide resin, a fluorine resin such as polytetrafluoroethylene, ethylene-
  • various synthetic resin materials such as thermoplastic elastomers, such as a vinyl acetate copolymer and polyester elastomer, can be mentioned, a polyester elastomer is used in this embodiment.
  • the flare portion 5 of the dilator 1 of the present embodiment is formed of an elastic body, even if the diameter is expanded or reduced by an external force, the original shape is immediately restored.
  • tubular member 3 and the flare part 5 may be comprised with the same material, and may be comprised with a different material. However, in consideration of the production efficiency of the dilator 1, in order to form it integrally, it is better to configure the tubular member 3 and the flare portion 5 with the same material.
  • the tubular member 3 and the distal end 4 are joined to the distal end of the tubular member 3 and the flared portion 5 is separated from the outer periphery of the tubular member 3 from the distal end 4 to the proximal end 2
  • the puncture hole can be easily expanded to facilitate the insertion of the dilator 1 into the lumen of the catheter and to facilitate the insertion of the catheter into the lumen of a patient's blood vessel or the like.
  • FIG. 3 is a schematic perspective view of the dilator according to the second embodiment
  • FIG. 4 is a longitudinal sectional view of the dilator according to the second embodiment.
  • the dilator 10 of the present embodiment is composed of a tubular member 3 and a flared portion 15 joined to the tip of the tubular member 3.
  • the dilator 10 of the present embodiment differs from the dilator 1 of the first embodiment only in the flare portion. That is, unlike the flare portion 5 of the first embodiment, the flare portion 15 has eight substantially elongated trapezoidal rectangular strip portions 18 disposed from the base end 12 to the tip end 14 and the same as the base end 12 to the tip end. It is composed of eight slits 11 formed between the strip parts 18 across the fourteen.
  • the longitudinal cross-sectional shape of the strip portion 18 is provided with a protruding portion 13 protruding toward the tubular member 3 in the vicinity of the proximal end 12. That is, in the flare portion 15, one protrusion 13 is formed at the base end of each strip 18, and a total of eight protrusions 13 are formed as a whole.
  • the flared portion 15 has a distal end 14 joined to the distal end of the tubular member 3 and has a conical diameter increasing gradually from the distal end 14 toward the proximal end 12 away from the outer periphery of the tubular member 3. Further, between the tubular member 3 and the flare portion 15, a gap 19 having a substantially wedge shape in longitudinal section is formed from the tip to the proximal end.
  • the material of the flare portion 15 is not particularly limited as long as it is an elastic body.
  • the material of the flare portion 15 is, for example, a polyvinyl chloride resin, a urethane resin such as polyurethane, a polyolefin resin such as polyethylene, polypropylene or ethylene-propylene copolymer, a polyamide resin, a fluorine resin such as polytetrafluoroethylene, ethylene-
  • various synthetic resin materials such as thermoplastic elastomers, such as a vinyl acetate copolymer and polyester elastomer, can be mentioned, a polyester elastomer is used in this embodiment.
  • the flare portion 15 of the dilator 10 of the present embodiment is made of an elastic body, so that the diameter is immediately reduced to the original shape even if the diameter is increased or reduced by external force. It is configured to return.
  • the external force at the time of diameter expansion and diameter reduction of the flare part 15 may be smaller than the external force at the time of diameter expansion and diameter reduction of the flare part 5 of 1st Embodiment. The point is apparent when comparing FIG. 3 with FIG.
  • tubular member 3 and the flare part 15 may be comprised with the same material, and may be comprised with a different material. However, in consideration of the production efficiency of the dilator 10, in order to form it integrally, it is better to configure the tubular member 3 and the flare portion 15 with the same material.
  • the slits 11 are formed in the flare portion 15 from the base end 14 toward the tip 12, in addition to the effects of the dilator 1 of the first embodiment,
  • the diameter of the puncture hole can be easily expanded by making it easy to reduce the outer diameter, thereby making it easier to insert the catheter into the lumen and by making the outer diameter of the flare portion 15 to easily expand. can do.
  • FIG. 5 is a schematic perspective view of the dilator of the third embodiment
  • FIG. 6 is a longitudinal sectional view of the dilator of the third embodiment.
  • the dilator 20 of the present embodiment is composed of a tubular member 3 and a flared portion 25 joined to the tip of the tubular member 3.
  • the dilator 20 of the present embodiment is different from the dilator 1 of the first embodiment only in the flare portion. That is, unlike the flared portion 5 of the first embodiment, the flared portion 25 has five helically shaped strip portions 28 disposed from the proximal end 22 toward the distal end, and also from the proximal end 22 toward the distal end. It comprises five helical slits 21 formed between the short strips 28 and a cone 27 disposed proximal to the tip 24.
  • the longitudinal cross-sectional shape of the strip portion 28 is provided with a protruding portion 23 protruding toward the tubular member 3 in the vicinity of the proximal end 22. That is, in the flare portion 25, one protrusion 23 is formed at the base end of each strip 28 and a total of five protrusions 23 are formed.
  • the flared portion 25 has a distal end 24 joined to the distal end of the tubular member 3 and has a conical diameter increasing gradually from the distal end 24 toward the proximal end 22 so as to be gradually separated from the outer periphery of the tubular member 3. Further, between the tubular member 3 and the flare portion 25, a gap 29 having a substantially wedge-shaped longitudinal cross section is formed from the tip to the proximal end.
  • the material of the flare portion 25 is not particularly limited as long as it is an elastic body.
  • the material of the flare portion 25 is, for example, a polyvinyl chloride resin, a urethane resin such as polyurethane, a polyolefin resin such as polyethylene, polypropylene or ethylene-propylene copolymer, a polyamide resin, a fluorine resin such as polytetrafluoroethylene, ethylene-
  • various synthetic resin materials such as thermoplastic elastomers, such as a vinyl acetate copolymer and polyester elastomer, can be mentioned, a polyester elastomer is used in this embodiment.
  • the flare portion 25 of the dilator 20 of the present embodiment is made of an elastic body, so that the diameter is immediately reduced to the original shape even if the diameter is increased or reduced by external force. It is configured to return.
  • the external force at the time of diameter expansion and diameter reduction of the flare part 25 becomes larger than the external force at the time of diameter expansion and diameter reduction of the flare part 15 of the dilator 10 of 2nd Embodiment, 1st Embodiment
  • the external force at the time of expanding and reducing the diameter of the flared portion 5 may be smaller. The point is clear when comparing FIGS. 5, 3 and 1 with each other.
  • the tubular member 3 and the flared portion 25 may be made of the same material, or may be made of different materials. However, in consideration of the production efficiency of the dilator 20, in order to form it integrally, it is better to configure the tubular member 3 and the flare portion 25 with the same material.
  • the flare is The diameter of the outer portion of the portion 25 is easily reduced to facilitate insertion into the lumen of the catheter, and the diameter of the outer portion of the flare portion 25 is easily expanded to facilitate puncture of the puncture hole. It can be easily extended.
  • FIG. 7 is a schematic perspective view of the dilator of the fourth embodiment
  • FIG. 8 is a longitudinal sectional view of the dilator of the fourth embodiment.
  • the dilator 60 of the present embodiment is composed of the tubular member 3 and the flared portion 65 joined to the tip of the tubular member 3.
  • the dilator 60 of the present embodiment differs from the dilator 1 of the first embodiment only in the flare portion. That is, unlike the flared portion 5 of the first embodiment, the flared portion 65 has a plurality of elliptical through holes 61 formed in the flared portion.
  • the flared portion 65 has a distal end 64 joined to the distal end of the tubular member 3 and has a conical diameter increasing gradually from the distal end 64 toward the proximal end 62 away from the outer periphery of the tubular member 3. Further, between the tubular member 3 and the flare portion 65, a gap 69 having a substantially wedge-shaped longitudinal cross section is formed from the tip to the base.
  • the material of the flare portion 65 is not particularly limited as long as it is an elastic body.
  • the material of the flare portion 65 is, for example, a polyvinyl chloride resin, a urethane resin such as polyurethane, a polyolefin resin such as polyethylene, polypropylene, ethylene-propylene copolymer, etc., a polyamide resin, a fluorine resin such as polytetrafluoroethylene, ethylene-
  • various synthetic resin materials such as thermoplastic elastomers, such as a vinyl acetate copolymer and polyester elastomer, can be mentioned, a polyester elastomer is used in this embodiment.
  • the flare portion 65 of the dilator 60 of the present embodiment is made of an elastic body, and therefore, even if the diameter is increased or reduced by an external force, it immediately becomes the original shape. It is configured to return.
  • the external force at the time of diameter expansion and diameter reduction of the flare part 65 may be smaller than the external force at the time of diameter expansion and diameter reduction of the flare part 5 of 1st Embodiment. The point is clear when comparing FIGS. 7 and 1.
  • the tubular member 3 and the flared portion 65 may be made of the same material, or may be made of different materials. However, in consideration of the production efficiency of the dilator 60, in order to form it integrally, it is better to configure the tubular member 3 and the flare portion 65 with the same material.
  • the dilator 60 of the present embodiment a plurality of elliptical through holes 61 are formed in the flare portion 65. Therefore, in addition to the effects of the dilator 1 of the first embodiment, the outer diameter of the flare portion 65 is By making it easy to reduce the diameter easily, the insertion into the lumen of the catheter becomes easier, and by making the outer diameter of the flared part 65 easily expand, the puncture hole can be easily expanded. it can.
  • a plurality of elliptical through holes 61 are formed in the flare portion 65.
  • the through holes may have a circular shape, not limited to an elliptical shape, and may have a polygonal shape such as a triangular shape or a rectangular shape. It may be
  • the size of the through hole 61 formed in the flare portion 65 may be the same as the entire shape of the flare portion 65, or the size of the through hole 61 may be smaller or larger toward the tip. However, since the flared portion 65 has a conical shape that narrows toward the tip, the size of the through hole 61 is desirably smaller toward the tip.
  • FIG. 9 is a schematic perspective view of the mandrel according to the fifth embodiment
  • FIG. 10 is a longitudinal sectional view of the mandrel according to the fifth embodiment
  • FIG. 11 is a longitudinal sectional view of a catheter kit according to the fifth embodiment. is there.
  • the mandrel 30 of this embodiment includes all the tubes of the dilator 1 of the first embodiment, the dilator 10 of the second embodiment, the dilator 20 of the third embodiment, and the dilator 60 of the fourth embodiment.
  • the member 3 has an insertable form.
  • the mandrel 30 is a hollow cylindrical member having a lumen 37 inside, and is an elongated flexible member. An opening 36 is formed at the tip 34 of the mandrel 30.
  • the material of the mandrel 30 is not particularly limited.
  • the material of the mandrel 30 is, for example, a polyvinyl chloride resin, a urethane resin such as polyurethane, a polyolefin resin such as polyethylene, polypropylene or ethylene-propylene copolymer, a polyamide resin, a fluorine resin such as polytetrafluoroethylene, ethylene-acetic acid
  • various synthetic resin materials such as a vinyl copolymer, can be mentioned, the synthetic resin material with comparatively high rigidity and slidability is suitable.
  • the dilator kit 50 of FIG. 11 inserts the tubular member 3 of the dilator 1 of the first embodiment into the lumen 37 of the mandrel 30 of the present embodiment, and then the tip 34 of the mandrel 30 to the void 9 of the flare portion 5 It shows a state in which it is advanced and made to abut on the inner circumferential surface of the flare portion 5.
  • the dilator 1 and the mandrel 30 having the lumen 37 into which the tubular member 3 can be inserted, and the tip 34 which can be inserted between the tubular member 3 and the flare portion 5 Since the mandrel 30 is provided, the outer diameter of the flared portion 5 can be more easily expanded by the mandrel 30, and the puncture hole for inserting the catheter into the blood vessel can be expanded more easily.
  • FIG. 12 is a schematic perspective view of the mandrel according to the sixth embodiment
  • FIG. 13 is a longitudinal sectional view of the mandrel according to the sixth embodiment
  • FIG. 14 is a longitudinal sectional view of a catheter kit according to the sixth embodiment. is there.
  • the mandrel 40 of the present embodiment also includes all the tubes of the dilator 1 of the first embodiment, the dilator 10 of the second embodiment, the dilator 20 of the third embodiment, and the dilator 60 of the fourth embodiment.
  • the member 3 has an insertable form.
  • the mandrel 40 is a hollow cylindrical member having a lumen 47 inside, and is an elongated flexible member.
  • a tapered portion 45 is formed at the tip of the mandrel 40, and an opening 46 is formed at the tip 44 of the mandrel 40.
  • the longitudinal cross-sectional shape of the taper part 45 of the mandrel 40 of this embodiment is a wedge shape.
  • the material of the mandrel 40 is not particularly limited.
  • the material of the mandrel 40 is, for example, a polyvinyl chloride resin, a urethane resin such as polyurethane, a polyolefin resin such as polyethylene, polypropylene or ethylene-propylene copolymer, a polyamide resin, a fluorine resin such as polytetrafluoroethylene, ethylene-acetic acid
  • various synthetic resin materials such as a vinyl copolymer, can be mentioned, the synthetic resin material with comparatively high rigidity and slidability is suitable.
  • the tapered portion 45 of the mandrel 40 It shows the state where it is advanced to reach the entire inner surface of the flare portion 5.
  • the catheter is inserted into the blood vessel.
  • the puncture hole of the can be further easily expanded.
  • FIG. 15 is a longitudinal cross-sectional view of the catheter kit of the seventh embodiment before the mandrel abuts on the tip of the dilator
  • FIG. 16 is the catheter kit of the seventh embodiment, the mandrel at the tip of the dilator It is a longitudinal cross-sectional view after contact
  • the dilator kit 70 of the present embodiment inserts the dilator 1 of the first embodiment into the lumen of the catheter 90 from its tip, and causes the tip of the dilator 1 to protrude from the tip of the catheter 90.
  • the outer diameter of the proximal end 2 of the flare portion 5 of the dilator 1 is set to be smaller than the inner diameter of the catheter 90 in a normal state. Therefore, inserting the dilator 1 into the catheter 90 is very easy.
  • FIG. 15 shows a state before the mandrel 40 is fitted to the flare portion 5 of the dilator 1.
  • the tapered portion 45 of the mandrel 40 is brought into contact with the flare portion 5 of the dilator 1 to increase the outer diameter of the flare portion 5 so as to be larger than the inner diameter of the catheter 90.
  • the dimensional difference between the outer peripheral surface of the flared portion 5 and the inner peripheral surface of the catheter 90 is d1.
  • the outer diameter of the proximal end 2 of the flared portion 5 is described as having a step between the outer diameter of the catheter 90 and the outer diameter of the catheter 90 in order to make the difference with the sixth embodiment described later In practice, however, the outer diameter of the proximal end 2 of the flared portion 5 and the outer diameter of the catheter 90 are substantially the same.
  • the dilator 1 and the catheter 90 into which the mandrel 40 can be inserted are provided, and the outer diameter at the proximal end 2 of the flare portion 5 is between the tubular member 3 and the flare portion 5. Since the insertion diameter of the catheter 90 is larger than the inner diameter of the catheter 90, the puncture hole for inserting the catheter into the blood vessel can be expanded larger than the inner diameter of the catheter 90. As a result, from the expanded puncture hole, The catheter 90 can be easily inserted into a blood vessel.
  • the outer diameter at the proximal end 2 of the flared portion 5 becomes smaller than the inner diameter of the catheter 90 by disengaging the mandrel 40 from between the tubular member 3 and the flared portion 5. The insertion into the lumen can be facilitated, and the dilator 1 can be easily withdrawn from the lumen of the catheter 90.
  • FIG. 17 is a longitudinal cross-sectional view of the catheter kit of the eighth embodiment before the mandrel abuts the tip of the dilator
  • FIG. 18 is a catheter kit of the eighth embodiment, the mandrel at the tip of the dilator It is a longitudinal cross-sectional view after contact
  • the dilator kit 80 of the present embodiment inserts the dilator 10 of the second embodiment from the tip into the lumen of the catheter 90 and causes the tip of the dilator 10 to protrude from the tip of the catheter 90.
  • the outer diameter of the proximal end 12 of the flare portion 15 of the dilator 10 is set to be smaller than the inner diameter of the catheter 90 in a normal state. Therefore, inserting the dilator 10 into the catheter 90 is very easy.
  • FIG. 17 shows a state before the mandrel 40 is fitted to the flared portion 15 of the dilator 10.
  • the tapered portion 45 of the mandrel 40 is brought into contact with the flare portion 15 of the dilator 10 to increase the outer diameter of the flare portion 15 so as to be larger than the outer diameter of the catheter 90.
  • the dimensional difference between the outer peripheral surface of the flare portion 15 and the outer peripheral surface of the catheter 90 is d2.
  • the dilator 10 and the catheter 90 into which the mandrel 40 can be inserted are provided, and the outer diameter of the proximal end 12 of the flared portion 15 is between the tubular member 3 and the flared portion
  • the puncture hole for inserting the catheter 90 into the blood vessel can be expanded to be larger than the outside diameter of the catheter 90, and as a result, from the expanded puncture hole , Catheter 90 can be easily inserted into a blood vessel.
  • the outer diameter of the proximal end 12 of the flared portion 15 becomes smaller than the inner diameter of the catheter 90 by disengaging the mandrel 40 from between the tubular member 3 and the flared portion 15.
  • the dilator 10 can be easily inserted into the lumen, and the dilator 10 can be easily removed from the lumen of the catheter 90.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Pulmonology (AREA)
  • Biophysics (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

Le problème décrit par la présente invention est d'obtenir un dilatateur et un kit de dilatateur, permettant d'agrandir facilement un trou de perforation afin de faciliter l'insertion d'un dilatateur dans une lumière de cathéter et de faciliter l'insertion d'un cathéter dans une lumière d'un patient, telle qu'un vaisseau sanguin. La solution selon l'invention porte sur un dilatateur (1) qui est pourvu : d'un élément tubulaire (3) ; et d'une partie évasée (5) dont l'extrémité avant est liée à l'extrémité avant de l'élément tubulaire (3), et qui a un diamètre qui s'étend en continu avec une augmentation de la distance depuis l'extrémité avant (4) vers l'extrémité de base (2) de manière à se séparer de la périphérie externe de l'élément tubulaire (3).
PCT/JP2017/038653 2017-10-26 2017-10-26 Kit de dilatateur et dilatateur WO2019082327A1 (fr)

Priority Applications (2)

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JP2019549765A JP6900499B2 (ja) 2017-10-26 2017-10-26 ダイレータキット
PCT/JP2017/038653 WO2019082327A1 (fr) 2017-10-26 2017-10-26 Kit de dilatateur et dilatateur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/038653 WO2019082327A1 (fr) 2017-10-26 2017-10-26 Kit de dilatateur et dilatateur

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WO2019082327A1 true WO2019082327A1 (fr) 2019-05-02

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021246054A1 (fr) * 2020-06-01 2021-12-09 朝日インテック株式会社 Dilatateur
WO2022249580A1 (fr) * 2021-05-26 2022-12-01 朝日インテック株式会社 Dilatateur et ensemble cathéter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006004825A2 (fr) * 2004-06-30 2006-01-12 Edwards Lifesciences Pvt, Inc. Dispositif et procede pour faciliter l'implantation d'une prothese de valve
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US20130079872A1 (en) * 2011-09-28 2013-03-28 Medtronic CV Luxembourg S.a.r.l. Distal Tip Assembly for a Heart Valve Delivery Catheter
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WO2021246054A1 (fr) * 2020-06-01 2021-12-09 朝日インテック株式会社 Dilatateur
JP7457579B2 (ja) 2020-06-01 2024-03-28 朝日インテック株式会社 ダイレータ
WO2022249580A1 (fr) * 2021-05-26 2022-12-01 朝日インテック株式会社 Dilatateur et ensemble cathéter

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