JP6770180B2 - カテーテル - Google Patents
カテーテル Download PDFInfo
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- JP6770180B2 JP6770180B2 JP2019513182A JP2019513182A JP6770180B2 JP 6770180 B2 JP6770180 B2 JP 6770180B2 JP 2019513182 A JP2019513182 A JP 2019513182A JP 2019513182 A JP2019513182 A JP 2019513182A JP 6770180 B2 JP6770180 B2 JP 6770180B2
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- tip
- mesh member
- hollow shaft
- wire
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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
- A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
- A61M25/0082—Catheter tip comprising a tool
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
- A61F2/013—Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
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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
- A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
- A61M25/0068—Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
- A61M25/0069—Tip not integral with 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
- A61M25/10—Balloon catheters
- A61M25/1006—Balloons formed between concentric tubes
-
- 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
- A61M25/104—Balloon catheters used for angioplasty
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
- A61B2017/00292—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
- A61B2017/003—Steerable
- A61B2017/00318—Steering mechanisms
- A61B2017/00323—Cables or rods
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22038—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with a guide wire
- A61B2017/22039—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with a guide wire eccentric
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22038—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with a guide wire
- A61B2017/22042—Details of the tip of the guide wire
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22038—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with a guide wire
- A61B2017/22042—Details of the tip of the guide wire
- A61B2017/22044—Details of the tip of the guide wire with a pointed tip
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22094—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for for crossing total occlusions, i.e. piercing
- A61B2017/22095—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for for crossing total occlusions, i.e. piercing accessing a blood vessel true lumen from the sub-intimal space
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
- A61B2017/2212—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions having a closed distal end, e.g. a loop
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
- A61F2/0108—Both ends closed, i.e. legs gathered at both ends
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
- A61F2002/016—Filters implantable into blood vessels made from wire-like elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
- A61F2002/018—Filters implantable into blood vessels made from tubes or sheets of material, e.g. by etching or laser-cutting
-
- 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
- A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
- A61M25/0074—Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable
- A61M2025/0079—Separate user-activated means, e.g. guidewires, guide tubes, balloon catheters or sheaths, for sealing off an orifice, e.g. a lumen or side holes, of a catheter
-
- 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
- A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
- A61M25/0082—Catheter tip comprising a tool
- A61M2025/0096—Catheter tip comprising a tool being laterally outward extensions or tools, e.g. hooks or fibres
-
- 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
- A61M2025/0177—Introducing, guiding, advancing, emplacing or holding catheters having external means for receiving guide wires, wires or stiffening members, e.g. loops, clamps or lateral tubes
-
- 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
- A61M2025/0183—Rapid exchange or monorail 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
- A61M25/10—Balloon catheters
- A61M2025/1043—Balloon catheters with special features or adapted for special applications
- A61M2025/1056—Balloon catheters with special features or adapted for special applications having guide wire lumens outside the main shaft, i.e. the guide wire lumen is within or on the surface of the balloon
-
- 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
- A61M2025/1043—Balloon catheters with special features or adapted for special applications
- A61M2025/1081—Balloon catheters with special features or adapted for special applications having sheaths or the like for covering the balloon but not forming a permanent part of the balloon, e.g. retractable, dissolvable or tearable sheaths
-
- 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
- A61M25/0172—Exchanging a guidewire while keeping the catheter in place
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Veterinary Medicine (AREA)
- General Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Engineering & Computer Science (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- Surgery (AREA)
- Vascular Medicine (AREA)
- Anesthesiology (AREA)
- Biophysics (AREA)
- Hematology (AREA)
- Pulmonology (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Molecular Biology (AREA)
- Child & Adolescent Psychology (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Description
(1)径方向に拡縮可能なチューブ状のメッシュ部材と、
前記メッシュ部材の基端に接続された第1の中空シャフトと、
前記メッシュ部材の先端に接続された先端チップと、
伸縮性を有する材料で形成され、前記メッシュ部材に配置されていると共に先端が前記先端チップの基端と前記第1の中空シャフトの先端との間に位置している誘導膜と、
先端が前記メッシュ部材の先端および/または前記先端チップに接続され、基端が前記第1の中空シャフトの基端よりも基端側に位置するように、前記メッシュ部材および前記第1の中空シャフトの内部を通って延びるコアワイヤと、を備え、
前記誘導膜の基端の膜厚が、前記誘導膜の先端の膜厚よりも厚いカテーテル、
(2)前記誘導膜の先端が、前記メッシュ部材が拡張した際に、最大拡張径となる部位に位置している前記(1)に記載のカテーテル、
(3)前記誘導膜の膜厚が、先端から基端に向かって増加している前記(1)または(2)に記載のカテーテル、並びに
(4)前記メッシュ部材の拡張径が、前記最大拡張径となる部位から基端に向かって減少し、
前記誘導膜の膜厚が、前記メッシュ部材の拡張径の減少に反比例して、先端から基端に向かって増加している前記(2)に記載のカテーテル
に関する。
図1は、本発明の第1の実施形態を示す概略正面図であって、メッシュ部材が縮径した状態を示す図である。当該カテーテル1は、図1に示すように、概略的に、メッシュ部材110と、第1の中空シャフト120と、先端チップ130と、第2の中空シャフト140と、コアワイヤ150と、誘導膜160と、コネクタ170とにより構成されている。
使用態様1では、当該カテーテル1を用いて逆行性ガイドワイヤW2を受け入れる。この使用態様1では、まず順行性ガイドワイヤW1(不図示)を例えば血管内に挿入した後、血管に沿って閉塞物が存在する部位(以下、「閉塞部位」ともいう)まで押し進める。
使用態様2では、当該カテーテル1を用いて順行性ガイドワイヤW1等により閉塞物を除去する。使用態様2において、順行性ガイドワイヤW1および当該カテーテル1を挿入する方法、並びにメッシュ部材110を拡径する方法は上述した方法と同様であるので、ここでの説明は省略する。この使用態様2では、まず使用態様1と同様に操作して順行性ガイドワイヤW1および当該カテーテル1を閉塞部位に到達させる。次いで、コアワイヤ150を操作してメッシュ部材110を拡径する。なお、順行性ガイドワイヤW1は当該カテーテル1から引き抜かない。
図22は、本発明の第2の実施形態を示す概略正面図であって、メッシュ部材が縮径した状態を示す図である。当該カテーテル2は、図22に示すように、概略的に、メッシュ部材110と、第1の中空シャフト120と、先端チップ130と、第2の中空シャフト240と、コアワイヤ250と、保持部材280と、誘導膜160と、コネクタ170(不図示)とにより構成されている。第2の実施形態は、第2の中空シャフト240、コアワイヤ250および保持部材280を備えている点で、第1の実施形態と異なっている。なお、メッシュ部材110、第1の中空シャフト120、先端チップ130、誘導膜160およびコネクタ170の構成は、第1の実施形態のものと同じ構成であるので、同一部分には同一符号を付してその詳細な説明は省略する。また、第2の中空シャフト240およびコアワイヤ250の材料は、第1の実施形態のものと同じであるので、第1の実施形態での説明を援用してその詳細な説明は省略する。
図29は、本発明の第3の実施形態を示す概略正面図であって、メッシュ部材が縮径した状態を示す図である。当該カテーテル3は、図29に示すように、概略的に、メッシュ部材110と、第1の中空シャフト120と、先端チップ130と、第2の中空シャフト340と、コアワイヤ150と、誘導膜160と、コネクタ170(不図示)とにより構成されている。第3の実施形態は、第2の中空シャフト340を備えてる点で、第1の実施形態と異なっている。なお、メッシュ部材110、第1の中空シャフト120、先端チップ130、コアワイヤ150、誘導膜160およびコネクタ170の構成は、第1の実施形態のものと同じ構成であるので、同一部分には同一符号を付してその詳細な説明は省略する。また、第2の中空シャフト340の材料は、第1の実施形態のものと同じであるので、第1の実施形態での説明を援用してその詳細な説明は省略する。
p1、p2 投影位置
W1 順行性ガイドワイヤ
W2 逆行性ガイドワイヤ
110 メッシュ部材
111 第1素線
112 第2素線
110a 交差部
110b 接合部
m、m1、m2 目開き
120 第1の中空シャフト
121 先端側シャフト
123 基端側シャフト
126 開口部
127、128、129 封止部材
130 先端チップ
140、240、340、341 第2の中空シャフト
150、250 コアワイヤ
280 保持部材
160、161 誘導膜
Claims (3)
- 先端側から向かって来る逆行性ガイドワイヤを受け入れるカテーテルであって、
径方向に拡縮可能なチューブ状のメッシュ部材と、
前記メッシュ部材の基端に接続された第1の中空シャフトと、
前記メッシュ部材の先端に接続された先端チップと、
伸縮性を有する材料で形成され、前記メッシュ部材に配置されていると共に先端が前記先端チップの基端と前記第1の中空シャフトの先端との間に位置し、前記逆行性ガイドワイヤを前記第1の中空シャフトに誘導する誘導膜と、
先端が前記メッシュ部材の先端および/または前記先端チップに接続され、基端が前記第1の中空シャフトの基端よりも基端側に位置するように、前記メッシュ部材および前記第1の中空シャフトの内部を通って延びるコアワイヤと、を備え、
前記誘導膜の膜厚が、先端から基端に向かって増加していることを特徴とするカテーテル。 - 前記誘導膜の先端が、前記メッシュ部材が拡張した際に、最大拡張径となる部位に位置している請求項1に記載のカテーテル。
- 前記メッシュ部材の拡張径が、前記最大拡張径となる部位から基端に向かって減少し、
前記誘導膜の膜厚が、前記メッシュ部材の拡張径の減少に反比例して、先端から基端に向かって増加している請求項2に記載のカテーテル。
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