WO2022215231A1 - 空気混入に対して対策された医療用イントロデューサシース - Google Patents

空気混入に対して対策された医療用イントロデューサシース Download PDF

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Publication number
WO2022215231A1
WO2022215231A1 PCT/JP2021/014923 JP2021014923W WO2022215231A1 WO 2022215231 A1 WO2022215231 A1 WO 2022215231A1 JP 2021014923 W JP2021014923 W JP 2021014923W WO 2022215231 A1 WO2022215231 A1 WO 2022215231A1
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WO
WIPO (PCT)
Prior art keywords
sheath
rear end
sub
inner sheath
lumens
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2021/014923
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
寛和 安藤
嵩大 柴田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Togo Medikit Co Ltd
Original Assignee
Togo Medikit Co Ltd
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 Togo Medikit Co Ltd filed Critical Togo Medikit Co Ltd
Priority to PCT/JP2021/014923 priority Critical patent/WO2022215231A1/ja
Priority to JP2023512608A priority patent/JPWO2022215231A1/ja
Priority to EP21936035.1A priority patent/EP4321199A4/en
Publication of WO2022215231A1 publication Critical patent/WO2022215231A1/ja
Priority to US18/480,717 priority patent/US20240024636A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06—Body-piercing guide needles or the like
    • A61M25/0662—Guide tubes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B18/1492—Probes or electrodes therefor having a flexible, catheter-like structure, e.g. for heart ablation
    • 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
    • A61M25/0009—Making of catheters or other medical or surgical tubes
    • A61M25/0012—Making of catheters or other medical or surgical tubes with embedded structures, e.g. coils, braids, meshes, strands or radiopaque coils
    • 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
    • A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0133—Tip steering devices
    • A61M25/0147—Tip steering devices with movable mechanical means, e.g. pull wires
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00053—Mechanical features of the instrument of device
    • A61B2018/00166—Multiple lumina
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
    • A61B2018/00345—Vascular system
    • A61B2018/00351—Heart
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
    • A61B2018/00345—Vascular system
    • A61B2018/00351—Heart
    • A61B2018/00357—Endocardium
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
    • A61B2018/00577—Ablation
    • 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
    • A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0133—Tip steering devices
    • A61M25/0147—Tip steering devices with movable mechanical means, e.g. pull wires
    • A61M2025/015—Details of the distal fixation of the movable mechanical means
    • 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
    • A61M25/0662—Guide tubes
    • A61M2025/0681—Systems with catheter and outer tubing, e.g. sheath, sleeve or guide tube
    • 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
    • A61M25/0043—Catheters; Hollow probes characterised by structural features
    • A61M25/005—Catheters; Hollow probes characterised by structural features with embedded materials for reinforcement, e.g. wires, coils, braids
    • 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
    • A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0133—Tip steering devices
    • A61M25/0136—Handles therefor

Definitions

  • the present disclosure relates to an introducer sheath used for treatment methods such as catheter ablation, and more particularly to a rear end structure that counteracts air entrainment in an introducer sheath whose distal end can be steered by a wire.
  • Catheter ablation is often performed to treat arrhythmia.
  • Catheter ablation uses an introducer assembly with a sheath long enough to reach the heart, for example, by feeding a catheter from the patient's groin through the femoral vein into the heart, and using the tip of the catheter. This is a treatment method that cauterizes a limited area of the heart using high frequency or the like.
  • Homogeneous assemblies may also be used to treat varicose veins, chronic pain, and tumors.
  • the sheath used in this type of treatment is designed so that only the tip can be steered by manual operation.
  • the rear end of the sheath also has a valve that allows the device to be hermetically inserted and removed for treatment.
  • a syringe can be connected to the assembly for the convenience of removing air, as air in the heart can be catastrophic.
  • Patent Documents 1 to 3 disclose related technologies.
  • a medical introducer sheath having a steerable distal end and a rearward end for securing to a hub having side ports extends from the distal end to the rearward end to extend to the distal end.
  • an inner sheath defining a main lumen that is open at a portion and the rearward end and in fluid communication with the side port; and an outer sheath that defines one or more sub-lumens, covers the inner sheath from the front end to the rear end, and is in airtight contact with or integral with the inner sheath at least at the rear end.
  • FIG. 1 is a schematic perspective view of an introducer sheath incorporated into a handle
  • FIG. FIG. 2 is a partial cross-sectional plan view of the introducer sheath incorporated into the handle
  • 3 is a cross-sectional plan view of an introducer sheath including a hub
  • FIG. 4 is a cross-sectional view of the introducer sheath taken from IV-IV of FIG. 3
  • FIG. 5 is a cross-sectional view of the introducer sheath taken from VV of FIG. 3
  • FIG. FIG. 6A is a vertical cross-sectional view for explaining the creation of the trailing end structure, showing the inner sheath and sub-sheath supported by the mandrel, respectively.
  • FIG. 6B is a vertical cross-sectional view for explaining the preparation of the rear end structure, showing a state in which the inner sheath and the sub-sheath are covered with a braid.
  • FIG. 6C is a vertical cross-sectional view for explaining the preparation of the rear end structure, showing a state in which the inner sheath, the sub-sheath and the braid are appropriately cut.
  • FIG. 6D is a vertical cross-sectional view for explaining the preparation of the trailing end structure, showing a modified mode of cutting the subsheath.
  • FIG. 6E is a vertical cross-sectional view for explaining the creation of the trailing end structure, showing a further modification of the mode of cutting the subsheath.
  • FIG. 6F is a vertical cross-sectional view for explaining the creation of the rear end structure, showing an example of cutting off a portion other than the rear end of the subsheath.
  • FIG. 6G is a vertical cross-sectional view for explaining the creation of the trailing end structure, showing a modified mode of cutting the subsheath or the braid.
  • FIG. 6H is a longitudinal cross-sectional view for explaining the preparation of the trailing end structure, showing the introducer sheath in a state after welding the outer sheath for the example based on FIG. 6C.
  • FIG. 6I is a longitudinal cross-sectional view for explaining the preparation of the trailing end structure, showing the introducer sheath after welding the outer sheath for the example based on FIG. 6D.
  • FIG. 6J is a longitudinal cross-sectional view for explaining the production of the rear end structure, showing the introducer sheath in a state after welding the outer sheath for the example based on FIG. 6E.
  • FIG. 6K is a longitudinal cross-sectional view for explaining the production of the trailing end structure, showing the introducer sheath after welding the outer sheath for the example based on FIG. 6F.
  • FIG. 6L is a diagram showing the introducer sheath in a state after the outer sheath is welded, showing an example different from the example shown in FIG. 6K.
  • FIG. 6M is a longitudinal cross-sectional view for explaining the creation of the rear end structure, showing the introducer sheath in a state after welding the outer sheath for the example based on FIG. 6G.
  • the medical introducer sheath according to this embodiment is mainly used for catheter ablation and used for treatment of heart disease such as arrhythmia. Of course, it can be used for other therapeutic purposes such as varicose veins, chronic pain, and tumors.
  • the sheath 1 is generally an elongated tube insertable into a patient's vein or artery and is typically utilized in combination with a handle 7 for manipulation thereof.
  • the tip portion 1L is particularly flexible, and can be steered as indicated by arrow LM by twisting knob 9 at hand as indicated by arrow TW.
  • the total length of the sheath 1 is long enough to reach the heart from the patient's groin, for example, about 900 mm, but of course this depends on the patient's physique.
  • the whole is made of flexible resin so that it can bend along the vein or artery, examples of which include polytetrafluoroethylene, tetrafluoroethylene perfluoroalkyl vinyl ether copolymer, aliphatic polyamide, polyether block amide, or Although it is a complex of two or more of these, it is not necessarily limited to this.
  • the tip portion 1L is made thin or made of a softer material so as to deform particularly flexibly.
  • a hub 3 is airtightly connected to the rear end portion 1T housed in the handle 7. As shown in FIG.
  • the side port 5 is further connected to a three-way stopcock 15 and used for convenient aspiration with a syringe.
  • a valve 17 whose center can be opened, for example, is fitted in the rear end of the hub 3 so that the device can be airtightly taken in and out from the rear end.
  • a pair of pull wires 11R, 11L are used for the purpose of steering the tip portion 1L.
  • the distal ends of the pull wires 11R and 11L are fixed to the distal end portion 1L, pulled out from the side openings 45R and 45L of the sheath 1, and connected to the moving pieces 13R and 13L, respectively.
  • the moving pieces 13R and 13L are linked to the knob 9 via appropriate cam mechanisms such as screw mechanisms. When the knob 9 is twisted in one direction, for example, the left moving piece 13L retreats and the right moving piece 13R advances.
  • the pull wire 11L pulls the left side of the tip portion 1L, and the pull wire 11R relaxes the right side, so that the tip portion 1L is displaced leftward as indicated by the dashed line in FIG. Needless to say, twisting the knob 9 in the opposite direction displaces the tip to the right.
  • the sheath 1 generally includes an inner sheath 21 extending from the front end portion 1L to the rear end portion 1T, and an outer sheath 31 covering the outer peripheral surface thereof.
  • the inner sheath 21 is an elongated tube with extremely thin wall surfaces and defines the main lumen 23 .
  • the inner sheath 21 has an opening 25 at its distal end and an opening 27 at its rear end. .
  • a rear end opening 27 is also in fluid communication with side port 5 through hub 3 for aspiration with a syringe.
  • the outer sheath 31 covers the outer peripheral surface of the inner sheath 21 and preferably adheres to the entire surface, but defines sub-lumens 43R and 43L corresponding to the pull wires 11R and 11L.
  • the sub-lumens 43R and 43L reach the distal end portion 1L in front thereof, but do not open outward.
  • the sub-lumens 43R and 43L each extend toward the rear end portion 1T, but do not reach the rear end portion 1T and terminate in front thereof.
  • the rear end portion 1T is drawn generally longer than the portion that is fitted into the hub 3, and the length is about several millimeters to several centimeters, but the present embodiment is not necessarily limited to this.
  • the sub-lumens 43R and 43L may extend to the vicinity of the rear end surface as long as they do not reach the rear end surface and open.
  • the sheath 1 may include sub-sheaths 41R and 41L embedded in the outer sheath 31 to define sub-lumens 43R and 43L.
  • the sub-sheaths 41R and 41L are also extremely thin tubes made of, for example, tetrafluoroethylene perfluoroalkyl vinyl ether copolymer, and structurally support the sub-lumens 43R and 43L so that they are not crushed.
  • the respective tips of the pull wires 11R and 11L are fixed to the tip portion 1L. They may be fixed directly to the inner sheath 21 or the outer sheath 31 , but they may also be joined together, for example, to the ring 35 and the ring 35 fixed to the inner sheath 21 and/or the outer sheath 31 .
  • the pull wires 11R and 11L are guided rearward from the distal end portion 1L through the sub-lumens 43R and 43L, particularly the sub-sheaths 41R and 41L.
  • the outer sheath 31 has openings 45R and 45L in front of the rear end portion 1T and communicates with the sub-lumens 43R and 43L, respectively.
  • the pull wires 11R, 11L are pulled out of the outer sheath 31 through the openings 45R, 45L, respectively, and are thereby connected to the moving pieces 13R, 13L, respectively.
  • the sheath 1 may also comprise a braid 33 embedded in the outer sheath 31.
  • the braid 33 is, for example, a tubular braid made of very fine stainless steel wires and covers the inner sheath 21 or the inner sheath 21 as well as the sub-sheaths 41R and 41L. As best shown in FIG. 3, the braid 33 extends along the inner sheath 21 and its leading and trailing ends may be generally aligned with the ends of the sub-sheaths 41R, 41L, or whichever is longer. good. In any case, the rear end of the braid 33 does not reach the rear end portion 1T of the sheath 1 and terminates in front of it.
  • the sub-lumens 43R, 43L and the braid 33 both terminate forward of the rear end 1T, so they do not appear in the cross section at the rear end 1T. .
  • the outer sheath 31 is in direct air-tight contact with the inner sheath 21 or integral therewith. This prevents air from leaking from around the sub-lumens 43R, 43L and the braid 33.
  • part of the sub-sheaths 41R, 41L may be included in the rear end portion 1T.
  • the inner sheath 21, the sub-sheaths 41R, 41L, and the outer sheath 31 are in airtight contact or integrated with each other, for example, by welding. Not exclusively. By melting into each other, they can be observed as one.
  • the inner sheath 21 and sub-sheaths 41R and 41L can be manufactured by extrusion molding, for example.
  • the inner sheath 21 and the sub-sheaths 41R, 41L are prepared with mandrels 23M, 43RM, 43LM, which are wires made of metal, for example, passed therethrough.
  • the sheath and mandrel may be prepared independently and the latter passed through the former, or the mandrel used to manufacture the sheath may be left intact and utilized.
  • the three sheaths 21, 41R, 41L are aligned side-by-side so that the inner sheath 21 is sandwiched between the sub-sheaths 41R, 41L.
  • the braid 33 is then put over the inner sheath 21 together with the sub-sheaths 41R and 41L. These trailing edges may be aligned with each other or may be slightly irregular.
  • the rear ends of the sub-sheaths 41R, 41L and the braid 33 are then cut to appropriate lengths, for example, about 10 to several tens of mm, so that these rear ends become the rear ends of the inner sheath 21. ends before At this time, the rear end of the inner sheath 21 is also very short and may be cut off.
  • the sub-sheaths 41R and 41L may be cut along their entire peripheries, but as shown in FIG. 6D, only the outer peripheral side may be cut and the side in contact with the inner sheath 21 may be left. Alternatively, as shown in FIG. 6E, the side in contact with the inner sheath 21 is also cut, but the cut may be made at a location other than the outer peripheral side.
  • portions other than the ends may be cut on the outer peripheral side. Further, the location where the braid 33 is cut may be different from the location where the sub-sheaths 41R and 41L are cut, as shown in FIG. 6G.
  • each may be filled with a filler, or may be closed with an adhesive or the like.
  • the inner sheath 21, the sub-sheaths 41R, 41L and the braid 33 are covered with the outer sheath 31 and joined together by welding or the like by heating.
  • the outer sheath 31 may be covered from the outside of the braid 33, or the outer sheath 31 may be formed by covering the outside of the braid 33 with a mold in advance and injecting the material into the mold while heating. In any case, when heated, the outer sheath 31 is sufficiently fluidized to be impregnated into the braid 33 and integrated therewith.
  • the sub-lumens 43R and 43L are airtightly sealed at the rear end portion 1T since they terminate in front of the rear end of the sheath 1.
  • the outer sheath 31 does not directly contact the inner sheath 21 at the rear end of the sheath 1, as shown in FIG. 6I. 31 can airtightly seal the sub-lumens 43R and 43L, and is in airtight contact with the inner sheath 21 to that extent.
  • the outer sheath 31 can flow into the sub-lumens 43R, 43L due to heating from the cut-off portions other than the end portions as shown in FIG. It terminates forward of the end and is airtight at the rear end. Further, as already described, in addition to the outer sheath 31, a filler, an adhesive, or the like may hermetically seal the sub-lumens 43R and 43L.
  • the outer sheath 31 and the inner sheath 21 may be covered with each other or cut in such a manner so that the rear ends of the outer sheath 31 and the inner sheath 21 are aligned with each other prior to joining. may be aligned.
  • the sheath 1 is obtained by removing the mandrel 23M.
  • the rear end portion 1T of the sheath 1 is inserted into the hub 3, and the rear end surface is abutted against the corresponding surface inside the hub 3.
  • the rear end portion 1T is airtightly joined to the hub 3 by means such as press fitting, adhesion or welding.
  • the manufacturing method described above is merely an example, and can be modified or modified as appropriate.
  • the braid and the subsheath are connected to the outer sheath while being aligned with the inner sheath, so the sublumen is inevitably opened at the rear end surface of the sheath, and the braid is also exposed at the rear end surface.
  • the rear end surface is blocked by the inner surface of the hub, it usually causes no problem.
  • such closure is not sufficient, and when the pressure inside the main lumen becomes negative, the pull wire passes through the sub-lumen from the opening through which the pull wire is pulled out, the rear end and the inner surface of the hub.
  • both the sub-lumens 43R and 43L and the braid 33 terminate forward of the rear end of the outer sheath 31 and do not reach the rear end surface, thus eliminating any path that draws air bubbles. Adhesion between the rear end surface of the sheath 1 and the inner surface of the hub does not matter. It is clear that even the slightest chance of air entrainment can be prevented.
  • a medical introducer sheath with measures against air entrainment is provided.

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PCT/JP2021/014923 2021-04-08 2021-04-08 空気混入に対して対策された医療用イントロデューサシース Ceased WO2022215231A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/JP2021/014923 WO2022215231A1 (ja) 2021-04-08 2021-04-08 空気混入に対して対策された医療用イントロデューサシース
JP2023512608A JPWO2022215231A1 (https=) 2021-04-08 2021-04-08
EP21936035.1A EP4321199A4 (en) 2021-04-08 2021-04-08 MEDICAL INTRODUCER SHIELD WITH COUNTERMEASURE AGAINST AIR INTRODUCTION
US18/480,717 US20240024636A1 (en) 2021-04-08 2023-10-04 Medical introducer sheath with measure against air intrusion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/014923 WO2022215231A1 (ja) 2021-04-08 2021-04-08 空気混入に対して対策された医療用イントロデューサシース

Related Child Applications (1)

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US18/480,717 Continuation US20240024636A1 (en) 2021-04-08 2023-10-04 Medical introducer sheath with measure against air intrusion

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WO2022215231A1 true WO2022215231A1 (ja) 2022-10-13

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Publication number Priority date Publication date Assignee Title
US20250269146A1 (en) * 2024-02-26 2025-08-28 Boston Scientific Scimed, Inc. Bi-directional steerable catheter

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WO2001054763A2 (en) 2000-01-25 2001-08-02 Daig Corporation Hemostasis valve
US20040116848A1 (en) * 2002-12-16 2004-06-17 Gardeski Kenneth C. Multi-Lumen steerable catheter
WO2007136981A2 (en) 2006-05-16 2007-11-29 St. Jude Medical, Atrial Fibrillation Division, Inc. Steerable catheter using flat pull wires and method of making same
JP2020062181A (ja) 2018-10-17 2020-04-23 メディキット株式会社 医療機器

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US5772590A (en) * 1992-06-30 1998-06-30 Cordis Webster, Inc. Cardiovascular catheter with laterally stable basket-shaped electrode array with puller wire
US6198974B1 (en) * 1998-08-14 2001-03-06 Cordis Webster, Inc. Bi-directional steerable catheter
US8273285B2 (en) * 2005-01-10 2012-09-25 St. Jude Medical, Atrial Fibrillation Division, Inc. Steerable catheter and methods of making the same
DE102006024094A1 (de) * 2006-05-17 2007-11-22 Epflex Feinwerktechnik Gmbh Gesteuert versteifbare Führungsdrahteinheit
EP3615122A4 (en) * 2017-04-28 2021-02-17 Merit Medical Systems, Inc. INSERTION DEVICE WITH SEMI-ANNEALED REINFORCEMENT ELEMENT AND ASSOCIATED SYSTEMS AND METHODS

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