WO2021153090A1 - Dispositif de support de ballonnet - Google Patents

Dispositif de support de ballonnet Download PDF

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Publication number
WO2021153090A1
WO2021153090A1 PCT/JP2020/047614 JP2020047614W WO2021153090A1 WO 2021153090 A1 WO2021153090 A1 WO 2021153090A1 JP 2020047614 W JP2020047614 W JP 2020047614W WO 2021153090 A1 WO2021153090 A1 WO 2021153090A1
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WO
WIPO (PCT)
Prior art keywords
balloon
insertion portion
support device
tip
outer tube
Prior art date
Application number
PCT/JP2020/047614
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English (en)
Japanese (ja)
Inventor
原田尚実
早川浩一
Original Assignee
テルモ株式会社
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Publication date
Application filed by テルモ株式会社 filed Critical テルモ株式会社
Priority to JP2021574536A priority Critical patent/JPWO2021153090A1/ja
Publication of WO2021153090A1 publication Critical patent/WO2021153090A1/fr

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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
    • A61M25/10—Balloon catheters

Definitions

  • the present invention relates to a balloon support device.
  • Japanese Patent No. 3921108 discloses a balloon catheter for treating a lesion (stenosis or occlusion) of the fallopian tube.
  • This balloon catheter includes a flexible outer tube, an inner tube arranged in the lumen of the outer tube so as to be movable in the axial direction with respect to the outer tube, and the tip and inner tube of the outer tube. It is provided with a tubular balloon that connects the tips to each other.
  • a salpingoscope endoscope
  • a balloon derivation step is performed in which the balloon is led out from the tip opening of the outer tube toward the tip to spread the lesion part of the fallopian tube.
  • the pressurizing step, the advancing step, the depressurizing step, and the retreating step are sequentially performed.
  • a balloon expanding fluid is supplied to the outer space between the balloon and the outer tube to expand the balloon in the radial direction.
  • the expanded balloon is projected toward the tip from the tip opening of the outer tube together with the insertion portion of the oviduct mirror.
  • the advancing distance of the balloon is half the advancing distance of the insertion portion of the oviduct.
  • the advancing step is performed until the tip of the salpingoscope is located near the tip of the balloon.
  • the pressure of the balloon expansion fluid is reduced.
  • the insertion portion is retracted by a predetermined length with respect to the balloon with the perfusate flowing between the insertion portion of the oviduct and the balloon.
  • the retreat process may be performed with the balloon located at the lesion of the fallopian tube. Then, the balloon is pushed inward in the radial direction by the reaction force from the lesion, so that the inner surface of the balloon comes into contact with the insertion part of the salpingoscope even when the pressure of the balloon expanding fluid is reduced. There is. In this case, the perfusate cannot reach the tip of the insertion portion, and the insertion portion may not be smoothly retracted with respect to the balloon.
  • Such problems occur when the retreat process is performed with the balloon located in a relatively narrow part of the fallopian tube (the part that is not the lesion), or when the retreat process is performed with the balloon located in the bent part of the fallopian tube. It can also occur when performing.
  • the present invention has been made in consideration of such a problem, and an object of the present invention is to provide a balloon support device capable of smoothly retracting the insertion portion with respect to the balloon in the retracting step.
  • One aspect of the present invention is a balloon support device used with a balloon catheter, wherein the balloon catheter has a flexible outer tube and the outer tube so as to be movable in the axial direction with respect to the outer tube. It has an inner tube disposed in the lumen of the tube, and a tubular balloon that connects the tip of the outer tube and the tip of the inner tube to each other and bulges inward in the radial direction of the outer tube.
  • the balloon projects from the tip opening of the outer tube toward the tip while the balloon is rolled up by transmitting a pushing force from the inner tube to the balloon, and the balloon support device is the balloon.
  • It has a linear insertion portion that supports the balloon that bulges inward in the radial direction while being inserted inside the insertion portion, and a liquid is placed between the insertion portion and the balloon on the outer peripheral surface of the insertion portion. It is a balloon support device in which a recess is formed to promote the flow of the liquid toward the tip end side of the insertion portion when supplied.
  • the liquid (perfusate) is circulated to the tip of the insertion portion through the recess formed on the outer peripheral surface of the insertion portion. be able to. Therefore, the insertion portion can be smoothly retracted with respect to the balloon in the retracting step.
  • FIG. 1 is a first explanatory view of salpingoscopic tuboplasty using the catheter system of FIG.
  • FIG. 2 is a second explanatory view of salpingoscopic tuboplasty using the catheter system of FIG.
  • FIG. 3 is a third explanatory view of salpingoscopic tuboplasty using the catheter system of FIG.
  • FIG. 4 is a fourth explanatory view of salpingoscopic tuboplasty using the catheter system of FIG. FIG.
  • FIG. 5 is a fifth explanatory view of salpingoscopic tuboplasty using the catheter system of FIG. It is a partially omitted perspective view of the insertion part which concerns on the 1st modification. It is explanatory drawing of the retreat process using the insertion part of FIG. It is a partially omitted perspective view of the insertion part which concerns on the 2nd modification. It is explanatory drawing of the retreat process using the insertion part of FIG.
  • the catheter system 12 includes a balloon catheter 14 and a balloon support device 10 used together with the catheter.
  • the balloon catheter 14 is used, for example, in tuboplasty for treating a lesion (stenosis, occlusion, etc.) of the fallopian tube.
  • the balloon catheter 14 may be used for treating lesions in biological organs such as blood vessels, bile ducts, trachea, esophagus, urethra, and other organs other than the fallopian tubes.
  • the left side (arrow A direction) in FIG. 1 is referred to as “tip” and the right side (arrow B direction) in FIG. 1 is referred to as "base end”.
  • the balloon catheter 14 includes an outer catheter 16, a slider 18 provided on the outer catheter 16, an inner catheter 20 inserted into the outer catheter 16, and a tip portion of the inner catheter 20. It is provided with a balloon 22 provided in the.
  • the outer catheter 16 has a long flexible outer tube 24, an outer tube hub 26 provided at the base end of the outer tube 24, and a fixing screw 28 provided on the outer tube hub 26.
  • the total length of the outer tube 24 is preferably set to 100 mm or more and 1500 mm or less, and more preferably 200 mm or more and 1000 mm or less.
  • the outer tube 24 includes an outer tube main body 30 and a tip tip 32 provided at the tip of the outer tube main body 30.
  • the constituent materials of the outer tube main body 30 and the tip tip 32 include polyolefin (for example, polyethylene, polypropylene, polybutene, etc.), olefin elastomer, polyester (for example, polyethylene terephthalate, etc.), polyester elastomer, and soft polyvinyl chloride.
  • Examples thereof include flexible polymer materials such as vinyl, polyurethane, urethane-based elastomers, polyamides, amide-based elastomers, polytetrafluoroethylene, fluororesin elastomers, polyimides, ethylene-vinyl acetate copolymers, and silicone rubbers.
  • flexible polymer materials such as vinyl, polyurethane, urethane-based elastomers, polyamides, amide-based elastomers, polytetrafluoroethylene, fluororesin elastomers, polyimides, ethylene-vinyl acetate copolymers, and silicone rubbers.
  • the outer tube main body 30 is formed with a first lumen 30a penetrating from the tip end to the base end.
  • the outer tube main body 30 has a substantially constant outer diameter from the tip end to the base end.
  • the tip end side of the outer tube body 30 is shaped so as to be curved in an arc shape in the axial direction.
  • the wall thickness of the outer tube main body 30 is set to 0.1 mm or more and 1.5 mm or less, preferably 0.15 mm or more, and more preferably 0.2 mm or more.
  • the outer surface of the tip tip 32 is curved to prevent damage to the balloon catheter 14 and living tissue.
  • the tip tip 32 is formed with a balloon lead-out hole 32a for leading the balloon 22 toward the tip of the tip tip 32.
  • the outer tube hub 26 is made of hard resin or metal (stainless steel, titanium, titanium alloy, etc.).
  • hard resin include polycarbonate, acrylic resin, polyester, polyolefin, styrene resin, polyamide, polysulfone, polyarylate, polyetherimide and the like.
  • the outer tube hub 26 is formed in a hollow shape with a size that is easy to operate manually.
  • the outer tube hub 26 has a first space 34 communicating with the first lumen 30a of the outer tube 24, and is located inside the outer tube hub 26 on the proximal end side (direction of arrow B) with respect to the first space 34.
  • a first insertion hole 36 through which the catheter 20 is inserted and an introduction port 38 communicating with the first space 34 are formed.
  • the introduction port 38 introduces the balloon expansion fluid supplied from a syringe or the like (not shown) into the first space 34.
  • the balloon expansion fluid is for inflating the balloon 22 in the radial direction of the outer tube 24, and is, for example, a physiological saline solution.
  • the outer pipe hub 26 is provided with a first seal member 42 for preventing the balloon expansion fluid in the first space 34 from leaking to the outside through the first insertion hole 36.
  • the fixing screw 28 fixes the inner catheter 20 to the outer tube hub 26 by screwing it into the screw hole 44 formed at the base end portion of the outer tube hub 26.
  • Examples of the constituent material of the fixing screw 28 are the same as those of the outer tube hub 26.
  • the slider 18 is provided on the outer peripheral surface of the outer pipe 24 in a state where it can be moved (sliding) in the axial direction of the outer pipe 24.
  • the total length of the slider 18 is shorter than the total length of the outer pipe 24.
  • the slider 18 has a long tubular slider main body 46 and a slider hub 48 provided at a base end portion of the slider main body 46.
  • Each of the slider body 46 and the slider hub 48 is made of the same material as the outer tube hub 26 described above.
  • the slider hub 48 is formed in an annular shape in a size that is easy to operate manually.
  • the tip side of the outer tube 24 in a state where the slider 18 is moved to the most proximal side (direction of arrow B) with respect to the outer tube 24 (a state in which the proximal end of the slider 18 is positioned at the tip of the outer tube hub 26). Is exposed on the tip side of the slider 18 and is curved in an arc shape. In a state where the slider 18 is moved to the most tip side (direction of arrow A) with respect to the outer tube 24, the tip side of the outer tube 24 extends linearly along the shape of the slider main body 46.
  • the inner catheter 20 includes a long inner tube 50 and an inner tube hub 52 provided at the proximal end of the inner tube 50.
  • the total length of the inner pipe 50 is preferably set to 100 mm or more and 1500 mm or less, and more preferably 200 mm or more and 1000 mm or less.
  • the inner tube 50 is made of a relatively hard resin (for example, fluororesin, polycarbonate, polyimide, PEEK resin, etc.) or a metal (for example, stainless steel, titanium, titanium alloy, etc.).
  • the inner tube 50 is a tube body having a second lumen 50a penetrating from the tip end to the base end.
  • the inner pipe 50 is arranged in the first lumen 30a of the outer pipe 24 while inserting the first space 34 and the first insertion hole 36 of the outer pipe hub 26.
  • the tip of the inner tube 50 is located in the proximal direction (arrow B direction) with respect to the tip of the outer tube 24.
  • An outer lumen 54 (expansion lumen) through which the balloon expansion fluid flows is provided between the inner pipe 50 and the outer pipe 24.
  • an inner lumen 56 (perfusion lumen) through which the perfusate flows flows is formed between the inner tube 50 and the insertion portion 70.
  • the perfusate is, for example, saline.
  • the inner tube hub 52 is made of the same material as the outer tube hub 26.
  • the inner tube hub 52 is formed in a hollow shape.
  • the inner tube hub 52 is inserted into the inner tube hub 52 at a position on the base end side (arrow B direction) of the inner tube hub 52 with respect to the second space 58 communicating with the second lumen 50a of the inner tube 50 and the second space 58.
  • a second insertion hole 60 through which the portion 70 is inserted and an introduction port 62 communicating with the second space 58 are formed.
  • the introduction port 62 introduces the perfusion solution supplied from a perfusion pump or the like (not shown) into the second space 58.
  • the inner pipe hub 52 is provided with a second seal member 66 for preventing the perfusate in the second space 58 from leaking to the outside through the second insertion hole 60.
  • the balloon 22 is a tubular member that connects the tip of the outer tube 24 and the tip of the inner tube 50 to each other.
  • the balloon 22 inflates inward in the radial direction of the outer tube 24.
  • the balloon 22 is formed so as to be elastically deformable in the radial direction.
  • Examples of the constituent materials of the balloon 22 include natural rubber, polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, soft polyvinyl chloride, polyurethane, polyurethane elastomer, polyisoprene, polyamide, and polyamide elastomer. Examples thereof include polyimide, polytetrafluoroethylene, and silicone rubber.
  • the balloon 22 is preferably composed of a polyamide elastomer, a urethane-based elastomer, or a polyester elastomer.
  • One end of the balloon 22 is adhered or fused to the tip of the outer tube 24.
  • one end of the balloon 22 is adhered or fused to the vicinity of the base end side of the balloon lead-out hole 32a in the outer tube 24.
  • the other end of the balloon 22 is adhered or fused and fixed to the tip of the outer surface of the inner tube 50.
  • the other end of the balloon 22 may be adhered or fused to the tip of the inner surface of the inner tube 50.
  • the balloon 22 has a lumen 23 into which the insertion portion 70 of the salpingoscope 11 can be inserted.
  • a bag-shaped outer space S with a closed tip is formed between the balloon 22 and the outer tube main body 30.
  • the balloon 22 is tipped from the tip opening 24a of the outer tube 24 via the balloon lead-out hole 32a by moving the inner tube 50 in the tip direction (arrow A direction) relative to the outer tube 24. Protruding in the direction. At this time, the balloon 22 protrudes while its protruding end 22a is turned outward. That is, the balloon 22 is formed with a portion that is doubly folded in the radial direction on the tip side of the outer tube 24 with respect to the tip opening 24a.
  • the balloon support device 10 is an oviduct mirror 11 (endoscope) used together with the balloon catheter 14.
  • the fallopian tube mirror 11 has a linear insertion portion 70 that supports the balloon 22 that bulges inward in the radial direction while being inserted into the lumen 23 of the balloon 22.
  • the insertion unit 70 is connected to a display unit (monitor) (not shown).
  • the insertion portion 70 has flexibility.
  • the insertion portion 70 has an insertion portion main body 72 and a covering member 74 that covers the outer peripheral surface of the insertion portion main body 72.
  • the insertion portion main body 72 extends linearly over the entire length of the insertion portion 70.
  • the tip surface of the insertion portion main body 72 is exposed from the covering member 74.
  • the insertion section main body 72 includes a camera section 76 for photographing the inside of the fallopian tube (biological organ) and a plurality of light sections 78 (five in the example of FIG. 3) that irradiate the inside of the fallopian tube (biological organ) with light. ,including.
  • the positions, numbers, shapes, sizes, etc. of the camera unit 76 and the light unit 78 can be appropriately set.
  • the covering member 74 is made of an electrically insulating material.
  • the covering member 74 is preferably made of a heat-shrinkable tube.
  • the insertion portion main body 72 can be easily covered with the heat shrinkable tube.
  • Examples of the heat-shrinkable tube include polyolefins and fluororesins.
  • a recess 80 is formed on the outer peripheral surface of the covering member 74 to promote the perfusate flowing toward the tip end side of the insertion portion 70 when the perfusate is supplied between the insertion portion 70 and the balloon 22. ..
  • the recess 80 includes a plurality of straight grooves 82 extending along the axial direction of the insertion portion 70. A perfusate can flow through each straight groove 82.
  • the straight groove 82 (recessed portion 80) extends continuously from the tip end of the insertion portion 70 toward the proximal end direction.
  • the plurality of straight grooves 82 are arranged around the covering member 74 at equal intervals in the circumferential direction. That is, the covering member 74 is provided with a convex portion 84 between straight grooves 82 adjacent to each other in the circumferential direction of the insertion portion 70.
  • the convex portion 84 extends along the axial direction of the insertion portion 70.
  • the groove depth of the straight groove 82 is preferably 0.01 mm or more and 0.5 mm or less, and more preferably 0.02 mm or more and 0.2 mm or less.
  • the plurality of straight grooves 82 are preferably provided at a portion of the insertion portion 70 that protrudes from the tip opening 24a of the outer tube 24 in the tip direction. Specifically, it is preferable that the plurality of straight grooves 82 extend at least 20 cm from the tip end of the insertion portion 70 in the proximal end direction. However, the position, size, shape, number, etc. of the straight groove 82 can be appropriately set.
  • the user inserts the balloon catheter 14 transcervically to the uterine cavity 200 and inserts the tip of the outer tube 24 into the fallopian tube ostium 202a of the fallopian tube 202. Bring it closer (insertion process). At this time, the user confirms the fallopian tube opening 202a by the photographed image of the fallopian tube mirror 11.
  • the balloon derivation process is performed. Specifically, the balloon expansion fluid is supplied to the introduction port 38 (pressurization step). Then, the balloon expansion fluid is supplied from the introduction port 38 to the outer space S of the balloon 22 via the first space 34 and the outer lumen 54.
  • the balloon 22 is elastically deformed by being pressed inward in the radial direction by the balloon expanding fluid supplied to the outer space S. That is, the portion of the balloon 22 located on the outer peripheral side of the insertion portion 70 is in close contact with the outer peripheral surface of the insertion portion 70.
  • the inner surfaces of the balloons 22 located closer to the tip of the insertion portion 70 are in contact with each other.
  • the user operates the inner pipe hub 52 with the fixing screw 28 loosened to move the inner pipe 50 forward with respect to the outer pipe 24 (advance step). Then, the balloon 22 pushed toward the tip end by the inner tube 50 advances with respect to the outer tube 24 together with the insertion portion 70. That is, the pushing force of the balloon 22 is transmitted from the inner tube 50 to the balloon 22, so that the balloon 22 projects in the tip direction from the tip opening 24a of the outer tube 24 together with the insertion portion 70.
  • the balloon 22 moves forward while its protruding end 22a is turned over. That is, the balloon 22 is turned up at its protruding end 22a so that the inner surface faces outward. Therefore, the balloon 22 advances by a distance equivalent to half the advance distance of the insertion portion 70. The advancing step is performed until the tip of the oviduct mirror 11 reaches the protruding end 22a of the balloon 22.
  • the user determines whether or not the balloon 22 has reached the lesion portion 204 based on the captured image of the salpingoscope 11.
  • the user may determine that the balloon 22 has reached the lesion portion 204 by pulling out all the balloons 22 forward.
  • the balloon dilation fluid is depressurized and the perfusion fluid is supplied to the introduction port 62 (decompression step).
  • the user retracts the fallopian tube mirror 11 by a predetermined distance (retraction step).
  • the above-mentioned pressurizing step and advancing step are performed again.
  • the retreat step may be performed with the balloon 22 located at the lesion portion 204.
  • the balloon 22 since the balloon 22 is pushed inward in the radial direction by the reaction force from the lesion portion 204, the inner surface of the balloon 22 is inserted into the oviduct mirror 11 even when the pressure of the balloon expanding fluid is reduced. It may come into contact with the part 70.
  • the introduction port 62 is formed even when the balloon 22 is in contact with the outer peripheral surface of the insertion portion 70 in the retracting step.
  • the perfusate supplied from the above flows through the straight groove 82 and is guided to the tip of the insertion portion 70. Therefore, in the retracting step, the insertion portion 70 can be smoothly retracted with respect to the balloon 22.
  • the lesion portion 204 is expanded by the balloon 22. That is, the stenosis or occlusion of the oviduct 202 is improved.
  • the user After expanding the lesion 204, the user removes the balloon catheter 14 and the salpingoscope 11 (removal step). Before removing the balloon catheter 14, physiological saline is injected through the introduction port 62, the oviduct mirror 11 is inserted, and the balloon catheter 14 is removed while observing the inside of the oviduct 202 with the oviduct mirror 11. You may. This completes the salpingoscopic tuboplasty.
  • the balloon catheter 14 according to the present embodiment has the following effects.
  • the fallopian tube mirror 11 which is the balloon support device 10, has a linear insertion portion 70 that supports the balloon 22 that bulges inward in the radial direction while being inserted inside the balloon 22, and has an outer peripheral surface of the insertion portion 70. Is formed with a recess 80 that promotes the flow of the perfusate to the tip end side of the insertion portion 70 when the perfusate is supplied between the insertion portion 70 and the balloon 22.
  • the balloon 22 is perfused to the tip of the insertion portion 70 through the recess 80 formed on the outer peripheral surface of the insertion portion 70.
  • the liquid can be circulated. Therefore, the insertion portion 70 can be smoothly retracted with respect to the balloon 22 in the retracting step.
  • the perfusate can flow through the recess 80, and extends continuously from the tip of the insertion portion 70 toward the proximal end.
  • the perfusate can be smoothly circulated to the tip of the insertion portion 70.
  • the recess 80 includes a straight groove 82 extending along the axial direction of the insertion portion 70.
  • the configuration of the insertion portion 70 can be simplified.
  • a plurality of straight grooves 82 are provided in the circumferential direction of the insertion portion 70.
  • the perfusate can be circulated more smoothly to the tip of the insertion portion 70.
  • the insertion portion 70a has an insertion portion main body 72 and a covering member 74a that covers the outer peripheral surface of the insertion portion main body 72.
  • Examples of the constituent material of the covering member 74a include the same materials as those of the covering member 74 described above.
  • a recess 80a is formed on the outer peripheral surface of the covering member 74a to promote the perfusate flowing toward the tip end side of the insertion portion 70a when the perfusate is supplied between the insertion portion 70a and the balloon 22. ..
  • the recess 80a includes a spiral groove 90 spirally extending on the outer peripheral surface of the insertion portion 70a. A perfusate can flow through the spiral groove 90.
  • the spiral groove 90 (recessed portion 80a) extends continuously from the tip end of the insertion portion 70a toward the proximal end direction.
  • the groove depth of the spiral groove 90 is preferably set in the same manner as the groove depth of the straight groove 82 described above.
  • the spiral groove 90 is preferably provided at a portion of the insertion portion 70a that protrudes in the tip direction from the tip opening 24a of the outer tube 24.
  • the spiral groove 90 preferably extends at least 20 cm from the tip of the insertion portion 70a in the proximal direction.
  • the position, size, shape, number, etc. of the spiral groove 90 can be set as appropriate.
  • the recess 80a includes a spiral groove 90 spirally extending on the outer peripheral surface of the insertion portion 70a. According to such a configuration, the insertion portion 70a can be smoothly retracted with respect to the balloon 22 in the retracting step while simplifying the configuration of the insertion portion 70a.
  • the insertion portion 70b has an insertion portion main body 72 and a covering member 74b that covers the outer peripheral surface of the insertion portion main body 72.
  • the constituent material of the covering member 74b include the same materials as those of the covering member 74 described above.
  • a recess 80b is formed on the outer peripheral surface of the covering member 74b to promote the perfusate flowing toward the tip end side of the insertion portion 70b when the perfusate is supplied between the insertion portion 70b and the balloon 22. ..
  • the recess 80b includes a plurality of annular grooves 92 provided so as to be adjacent to the insertion portion 70b in the axial direction. Therefore, an annular convex portion 94 is formed between the annular grooves 92 adjacent to each other in the axial direction of the insertion portion 70b.
  • each annular groove 92 has an arcuate cross section along the axial direction of the insertion portion 70b.
  • the annular convex portion 94 has an arcuate cross section along the axial direction of the insertion portion 70b.
  • the groove depth of the annular groove 92 is preferably set in the same manner as the groove depth of the straight groove 82 described above.
  • the plurality of annular grooves 92 are preferably provided at a portion of the insertion portion 70b that protrudes from the tip opening 24a of the outer tube 24 in the tip direction in the balloon lead-out step.
  • the plurality of annular grooves 92 are provided in a range of at least 20 cm from the tip end of the insertion portion 70b in the proximal end direction.
  • the position, size, shape, number, etc. of the annular groove 92 can be appropriately set.
  • the perfusate is supplied to the annular groove 92 not covered by the inner surface of the balloon 22.
  • the perfusate in the annular groove 92 sequentially overcomes the annular convex portion 94 located in the tip direction (arrow A direction) of the insertion portion 70b, and the insertion portion 70b. It is guided to the tip of. Therefore, the insertion portion 70b can be smoothly retracted with respect to the balloon 22 in the retracting step.
  • the recess 80b includes an annular groove 92 extending along the circumferential direction of the insertion portion 70b, and a plurality of annular grooves 92 are provided so as to be adjacent to the insertion portion 70b in the axial direction. According to such a configuration, the insertion portion 70b can be smoothly retracted with respect to the balloon 22 in the retracting step while simplifying the configuration of the insertion portion 70b.
  • the embodiment is a balloon support device (10) used with a balloon catheter (14), wherein the balloon catheter has a flexible outer tube (24) and an axial direction with respect to the outer tube.
  • the inner tube (50) arranged in the inner cavity (30a) of the outer tube so as to be movable, and the tip of the outer tube and the tip of the inner tube are connected to each other and in the radial direction of the outer tube. It has a tubular balloon (22) that swells inward, and the balloon has a tip opening (24a) of the outer tube while the balloon is rolled up by transmitting a pushing force from the inner tube to the balloon.
  • the balloon support device is a linear insertion portion (70, 70a, 70b) that supports the balloon that bulges inward in the radial direction while being inserted inside the balloon.
  • the outer peripheral surface of the insertion portion has a recess (80) that promotes the flow of the liquid toward the tip end side of the insertion portion when the liquid is supplied between the insertion portion and the balloon. , 80a, 80b) are formed, the balloon support device is disclosed.
  • the recess may allow the liquid to flow and may extend continuously from the tip of the insertion portion toward the proximal end.
  • the recess may include a straight groove (82) extending along the axial direction of the insertion portion.
  • a plurality of the straight grooves may be provided in the circumferential direction of the insertion portion.
  • the recess may include a spiral groove (90) spirally extending on the outer peripheral surface of the insertion portion.
  • the recess includes an annular groove (92) extending along the circumferential direction of the insertion portion, and a plurality of the annular grooves are provided so as to be adjacent to each other in the axial direction of the insertion portion. You may.
  • the groove wall surface forming the annular groove may have an arcuate cross section along the axial direction of the insertion portion.
  • the recess may be provided within a range of at least 20 cm from the tip of the insertion portion.
  • the balloon support device may be an endoscope (11).

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  • Heart & Thoracic Surgery (AREA)
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Abstract

Ce dispositif de support de ballonnet (10) doit être utilisé conjointement avec un cathéter à ballonnet (14). Le dispositif de support de ballonnet (10) a une partie d'insertion linéaire (70) qui, dans un état d'insertion à l'intérieur d'un ballonnet (22), supporte le ballonnet (22) qui se gonfle médialement dans la direction radiale. La partie d'insertion (70) a, formée dans sa surface circonférentielle externe, une partie en creux (80) qui, lorsque du liquide est introduit entre la partie d'insertion (70) et le ballonnet (22), facilite l'écoulement du liquide vers le côté d'extrémité avant de la partie d'insertion (70).
PCT/JP2020/047614 2020-01-29 2020-12-21 Dispositif de support de ballonnet WO2021153090A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05509255A (ja) * 1991-10-17 1993-12-22 イマジン　メディカル　インコーポレイテッド 延長制御を行うリニア外返りカテーテル装置
JPH06217937A (ja) * 1993-01-13 1994-08-09 Imagyn Medical Inc 内視鏡
JPH06237894A (ja) * 1993-02-15 1994-08-30 Fuji Photo Optical Co Ltd 内視鏡の湾曲部構造
JP2007083072A (ja) * 2006-12-18 2007-04-05 Terumo Corp バルーンカテーテル
US20140276621A1 (en) * 2013-03-14 2014-09-18 Covidien Lp Fluid delivery catheter with pressure-actuating needle deployment and retraction

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