JP2005058750A - 同軸プローブ - Google Patents
同軸プローブ Download PDFInfo
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- JP2005058750A JP2005058750A JP2004145186A JP2004145186A JP2005058750A JP 2005058750 A JP2005058750 A JP 2005058750A JP 2004145186 A JP2004145186 A JP 2004145186A JP 2004145186 A JP2004145186 A JP 2004145186A JP 2005058750 A JP2005058750 A JP 2005058750A
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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
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
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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
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
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- Heart & Thoracic Surgery (AREA)
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Abstract
【解決手段】 内導体1と外導体3との間に誘電体2を介在させた同軸プローブにおいて、先端を内導体1から外導体3にかけて円錐形状にして内導体1と誘電体2を露出させるとともに、この円錐形状部100cの高さtを、tの変化に対する同軸プローブの反射係数の特性で略減衰極となる値に定める。また、誘電体2の誘電率を周囲(電磁放射対象である生体組織)の誘電率に対して0.132〜0.6倍の範囲に定める。
【選択図】 図1
Description
この凝固療法は、同軸プローブを直接患部に挿し込み、同軸プローブから放射される電磁波で患部を直接加温することによって、患部の組織を凝固壊死させる方法である。
また、図7に示したように先端チップ63を同軸プローブの先端に装着して体内への穿刺を可能としたものでは、その先端チップが大きいため、先端チップが患部を突き抜けて正常な組織までも損傷させてしまうことも起こり得る。
P=ωεE2tanδ
と表せる。
SAR=ωεE2tanδ/ρ
である。さらに、生体組織の導電率をσとすると、
tan δ=σ/(ωε)であるから、
SAR=σE2 /ρ
と表せる。
〔各部の寸法〕
L1=70
L2=30
r1=0.24
r2=0.8
r3=0.1
L=60
R=10
(単位はすべて[mm])
〔誘電体〕
(1) 比誘電率εr=9.7(アルミナセラミックス)
(2) 比誘電率εr=2.1(ポリテトラフルオロエチレン:PTFE)
《臓器OR》
〔各部の寸法〕
L=60
R=10
(単位は[mm])
比誘電率εr=43.0(肝臓の比誘電率に等しい値)
tanδ=10×1010
導電率σ=1.69
とし、周波数を2.45GHzとし、FEM(有限要素法)を用いてシミュレーションした。
2−誘電体
3−外導体
S−スリット
OR−臓器
100−同軸プローブ
100c−円錐形状部
Claims (2)
- 内導体と外導体との間に誘電体を介在させた同軸プローブにおいて、
先端を内導体から外導体にかけて円錐形状にして内導体と誘電体を露出させるとともに、内導体の先端から外導体の端部までの距離を、当該距離の変化に対する反射係数の特性で略減衰極となる値に定めたことを特徴とする同軸プローブ。 - 前記誘電体の誘電率を周囲の誘電率に対して0.132〜0.6倍の範囲に設定したことを特徴とする請求項1に記載の同軸プローブ。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004145186A JP4232688B2 (ja) | 2003-07-28 | 2004-05-14 | 同軸プローブ |
US10/862,464 US7180307B2 (en) | 2003-07-28 | 2004-06-08 | Coaxial probe |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003202659 | 2003-07-28 | ||
JP2004145186A JP4232688B2 (ja) | 2003-07-28 | 2004-05-14 | 同軸プローブ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005058750A true JP2005058750A (ja) | 2005-03-10 |
JP4232688B2 JP4232688B2 (ja) | 2009-03-04 |
Family
ID=34106851
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004145186A Expired - Fee Related JP4232688B2 (ja) | 2003-07-28 | 2004-05-14 | 同軸プローブ |
Country Status (2)
Country | Link |
---|---|
US (1) | US7180307B2 (ja) |
JP (1) | JP4232688B2 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010505571A (ja) * | 2006-10-10 | 2010-02-25 | マイクロオンコロジー・リミテッド | 手術用アンテナ |
JP2018167052A (ja) * | 2011-04-08 | 2018-11-01 | コビディエン エルピー | 天然または人工管腔のための可撓性マイクロ波カテーテル |
JP2019524376A (ja) * | 2016-08-26 | 2019-09-05 | エンブレーション リミテッドEmblation Limited | マイクロ波装置 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7826904B2 (en) * | 2006-02-07 | 2010-11-02 | Angiodynamics, Inc. | Interstitial microwave system and method for thermal treatment of diseases |
US8059059B2 (en) * | 2008-05-29 | 2011-11-15 | Vivant Medical, Inc. | Slidable choke microwave antenna |
US8188435B2 (en) | 2010-06-03 | 2012-05-29 | Tyco Healthcare Group Lp | Specific absorption rate measurement and energy-delivery device characterization using thermal phantom and image analysis |
US9468492B2 (en) | 2010-06-03 | 2016-10-18 | Covidien Lp | Specific absorption rate measurement and energy-delivery device characterization using image analysis |
US9241762B2 (en) | 2010-06-03 | 2016-01-26 | Covidien Lp | Specific absorption rate measurement and energy-delivery device characterization using image analysis |
US9377367B2 (en) | 2010-06-03 | 2016-06-28 | Covidien Lp | Specific absorption rate measurement and energy-delivery device characterization using thermal phantom and image analysis |
WO2013022077A1 (ja) * | 2011-08-10 | 2013-02-14 | 国立大学法人 滋賀医科大学 | マイクロ波手術器具 |
CN103884919B (zh) * | 2014-03-13 | 2017-02-15 | 四川大学 | 具有同轴线结构的高温状态介质介电系数测量探头及系统 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3926934A1 (de) * | 1989-08-16 | 1991-02-21 | Deutsches Krebsforsch | Hyperthermie-mikrowellenapplikator zur erwaermung einer begrenzten umgebung in einem dissipativen medium |
JP3514854B2 (ja) | 1994-02-18 | 2004-03-31 | オリンパス株式会社 | 超音波診断治療システム |
US6813515B2 (en) * | 2002-01-04 | 2004-11-02 | Dune Medical Devices Ltd. | Method and system for examining tissue according to the dielectric properties thereof |
ATE398974T1 (de) * | 2002-11-27 | 2008-07-15 | Medical Device Innovations Ltd | Coaxiale gewebeablationsprobe und verfahren zum herstellen eines symmetriergliedes dafür |
-
2004
- 2004-05-14 JP JP2004145186A patent/JP4232688B2/ja not_active Expired - Fee Related
- 2004-06-08 US US10/862,464 patent/US7180307B2/en active Active
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010505571A (ja) * | 2006-10-10 | 2010-02-25 | マイクロオンコロジー・リミテッド | 手術用アンテナ |
JP2018167052A (ja) * | 2011-04-08 | 2018-11-01 | コビディエン エルピー | 天然または人工管腔のための可撓性マイクロ波カテーテル |
US10314652B2 (en) | 2011-04-08 | 2019-06-11 | Covidien Lp | Flexible microwave catheters for natural or artificial lumens |
US10321956B2 (en) | 2011-04-08 | 2019-06-18 | Covidien Lp | Flexible microwave catheters for natural or artificial lumens |
US10363094B2 (en) | 2011-04-08 | 2019-07-30 | Covidien Lp | Flexible microwave catheters for natural or artificial lumens |
US11234765B2 (en) | 2011-04-08 | 2022-02-01 | Covidien Lp | Flexible microwave catheters for natural or artificial lumens |
JP2019524376A (ja) * | 2016-08-26 | 2019-09-05 | エンブレーション リミテッドEmblation Limited | マイクロ波装置 |
JP7178988B2 (ja) | 2016-08-26 | 2022-11-28 | エンブレーション リミテッド | マイクロ波装置 |
Also Published As
Publication number | Publication date |
---|---|
US7180307B2 (en) | 2007-02-20 |
US20050027335A1 (en) | 2005-02-03 |
JP4232688B2 (ja) | 2009-03-04 |
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