JP5349852B2 - 医療用デバイス - Google Patents
医療用デバイス Download PDFInfo
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- JP5349852B2 JP5349852B2 JP2008164627A JP2008164627A JP5349852B2 JP 5349852 B2 JP5349852 B2 JP 5349852B2 JP 2008164627 A JP2008164627 A JP 2008164627A JP 2008164627 A JP2008164627 A JP 2008164627A JP 5349852 B2 JP5349852 B2 JP 5349852B2
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- 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
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- 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
- A61B18/1477—Needle-like probes
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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
- A61B17/0057—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect
- A61B2017/00575—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect for closure at remote site, e.g. closing atrial septum defects
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- 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
- A61B2018/00273—Anchoring means for temporary attachment of a device to tissue
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- 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
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- 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
- A61B2018/00619—Welding
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- 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
- A61B2018/1405—Electrodes having a specific shape
- A61B2018/1425—Needle
-
- 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
- A61B2018/1497—Electrodes covering only part of the probe circumference
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Otolaryngology (AREA)
- Plasma & Fusion (AREA)
- Physics & Mathematics (AREA)
- Biomedical Technology (AREA)
- Veterinary Medicine (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Cardiology (AREA)
- Surgical Instruments (AREA)
- External Artificial Organs (AREA)
- Eye Examination Apparatus (AREA)
Description
2…第2電極部材、
20…エネルギ供給手段、
30…カテーテル、
31…ガイディングカテーテル、
40…位置決め手段、
50…支持具(取付部)、
60…位置決め保持手段、
61…位置決め部、
62…保持部、
M…生体組織(膜状部材)、
M1…心房中隔、
M2…卵円孔弁、
O…卵円孔、
S1…第1電極部材の電極面の面積、
S2…第2電極部材の電極面の面積、
Z…電気絶縁体。
Claims (14)
- 一対の電極部材により生体組織を挟持し、エネルギ供給手段から前記両電極部材に電気エネルギを供給し前記生体組織を融着あるいは壊死させる医療用デバイスであって、
前記一対の電極部材は、面積が相互に異なる第1電極部材と第2電極部材とを有し、
前記第2電極部材は、前記生体組織を穿刺する針状電極部材であり、
前記生体組織は、心臓の左心房と右心房との間に位置する膜状部材であり、前記左心房側に位置する第2電極部材と、前記右心房側に位置する第1電極部材とにより前記膜状部材を挟持するとき、前記第1電極部材の前記膜状部材に接触してエネルギ供給が行われる部分の電極面の面積(S1)が、前記第2電極部材の前記膜状部材に接触してエネルギ供給が行われる部分の電極面の面積(S2)より小さくなるように構成されている、ことを特徴とする医療用デバイス。 - 前記第1電極部材および前記第2電極部材の少なくとも一方は、一部を電気絶縁体で被覆し前記電極面としたことを特徴とする請求項1に記載の医療用デバイス。
- 前記第1電極部材は、扁平な板状電極部材により構成したことを特徴とする請求項1又は2に記載の医療用デバイス。
- 前記第1電極部材の前記電極面の面積(S1)が、前記第2電極部材の電極面の面積(S2)より小さくなるように前記第1電極部材を電気絶縁体により被覆したことを特徴とする請求項1〜3のいずれかに記載の医療用デバイス。
- 前記針状電極部材は、基部側から先端に向って末広がりに拡開する複数の電極部材により構成したことを特徴とする請求項1〜4のいずれかに記載の医療用デバイス。
- 前記一対の電極部材は、基部側を電気絶縁部材よりなる取付部に保持したことを特徴とする請求項1〜5のいずれかに記載の医療用デバイス。
- 前記第1電極部材および前記第2電極部材の少なくとも一方は、前記取付部からの突出長の調整により電極面の面積を調整可能としたことを特徴とする請求項6に記載の医療用デバイス。
- 前記第1電極部材および前記第2電極部材は、表面を、前記生体組織、血栓あるいは血液が付着しにくい導電性材料により被覆したことを特徴とする請求項1〜7のいずれかに記載の医療用デバイス。
- 前記第2電極部材の電極面の面積(S2)と、前記第1電極部材の電極面の面積(S1)との面積比(S1/S2)が、0.6〜1.0未満としたことを特徴とする請求項1〜8のいずれかに記載の医療用デバイス。
- 前記取付部は、ガイディングカテーテル内に設けられたカテーテルにより構成したことを特徴とする請求項6又は7に記載の医療用デバイス。
- 前記医療用デバイスは、前記第2電極部材を卵円孔に対し所定位置に位置させる位置決め手段を有することを特徴とする請求項1〜10のいずれかに記載の医療用デバイス。
- 前記医療用デバイスは、卵円孔に対し前記第2電極部材を位置決めする位置決め部と、卵円孔弁を前記第2電極部材の穿刺方向に対し後退不能に保持する保持部と、からなる位置決め保持手段を有することを特徴とする請求項1〜10のいずれかに記載の医療用デバイス。
- 前記エネルギ供給手段は、前記両電極部材間の生体組織のインピーダンスにより電流を制御するバイポーラ方式であることを特徴とする請求項1〜12のいずれかに記載の医療用デバイス。
- 前記針状電極部材からなる第2電極部材は、前記穿刺により前記生体組織を越える位置に電極面が配置され、前記第1電極部材は、前記生体組織の手前に電極面が配置されてなる請求項1〜13のいずれかに記載の医療デバイス。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008164627A JP5349852B2 (ja) | 2007-06-25 | 2008-06-24 | 医療用デバイス |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007166786 | 2007-06-25 | ||
JP2007166786 | 2007-06-25 | ||
JP2008164627A JP5349852B2 (ja) | 2007-06-25 | 2008-06-24 | 医療用デバイス |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2009028522A JP2009028522A (ja) | 2009-02-12 |
JP5349852B2 true JP5349852B2 (ja) | 2013-11-20 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2008164627A Active JP5349852B2 (ja) | 2007-06-25 | 2008-06-24 | 医療用デバイス |
Country Status (5)
Country | Link |
---|---|
US (1) | US8394090B2 (ja) |
EP (1) | EP2008601B1 (ja) |
JP (1) | JP5349852B2 (ja) |
AT (1) | ATE474515T1 (ja) |
DE (1) | DE602008001835D1 (ja) |
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US20080140074A1 (en) | 2006-12-07 | 2008-06-12 | Cierra, Inc. | Multi-electrode apparatus for tissue welding and ablation |
US20080140064A1 (en) | 2006-12-07 | 2008-06-12 | Cierra, Inc. | Energy delivery apparatus with tissue piercing thermocouple |
US20080140112A1 (en) | 2006-12-07 | 2008-06-12 | Cierra, Inc. | Method for orienting a multi-electrode apparatus |
US20080140113A1 (en) | 2006-12-07 | 2008-06-12 | Cierra, Inc. | Method for sealing a pfo using an energy delivery device |
-
2008
- 2008-06-24 US US12/145,208 patent/US8394090B2/en active Active
- 2008-06-24 JP JP2008164627A patent/JP5349852B2/ja active Active
- 2008-06-25 EP EP08159038A patent/EP2008601B1/en active Active
- 2008-06-25 AT AT08159038T patent/ATE474515T1/de not_active IP Right Cessation
- 2008-06-25 DE DE602008001835T patent/DE602008001835D1/de active Active
Also Published As
Publication number | Publication date |
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US20080319439A1 (en) | 2008-12-25 |
ATE474515T1 (de) | 2010-08-15 |
DE602008001835D1 (de) | 2010-09-02 |
JP2009028522A (ja) | 2009-02-12 |
US8394090B2 (en) | 2013-03-12 |
EP2008601B1 (en) | 2010-07-21 |
EP2008601A2 (en) | 2008-12-31 |
EP2008601A3 (en) | 2009-01-14 |
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