KR19990067035A - 배터리로 동작되는 전기수술용 휴대용 장치 - Google Patents
배터리로 동작되는 전기수술용 휴대용 장치 Download PDFInfo
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- 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
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Abstract
무선 전기수술용 장치는 손잡이(10) 및 손잡이의 한쪽 끝에서 돌출된 하나의 치료전극을 가진다. 무선 주파수 제너레이터, 배터리 및 제너레이터를 둘러싸고 있지만 제너레이터로부터 분리된 전기적 전도실드가 손잡이내에 포함된다. 제너레이터와 환자간 무선 주파수 귀로 전류는 제너레이터 회로와 환자간, 대부분 실드와 기구를 들고 있는 외과의사간에 표유 용량 커플링되어 흐른다.
Description
공지된 전기수술용 시스템은, 손잡이, 손잡이에서 돌출된 하나의 치료 전극을 구비한 단일전극 유닛, 제너레이터 유닛 및 제너레이터 유닛을 손잡이에 연결하는 케이블을 포함한다. 이런 시스템은 여러 형태의 전기외과 수술에 일반적으로 사용된다. 보통, 전도 패드는 환자의 신체에 부착되며 전기수술용 전류의 귀로를 제공하는 제너레이터 장치의 귀로 단자에 접속된다. 이 구성의 단점은 전기수술용 전류를 귀로 패드 영역내의 조직에만 한정시키고 특히 더 높은 주파수에서 제너레이터와 손잡이간의 케이블에 의해 예측하지 못한 반응이 나타나며, 이에 따라 전극에서 예측할 수 없는 전압 레벨을 야기한다.
본 발명은 단일전극 유닛을 구비한 전기수술용 장치에 관한 것으로, 더 상세하게는 전형적으로 5MHz 이상의 고주파수에서 동작가능한 장치에 관한 것이다.
도 1은 발명에 따른 사용상태를 도시한 장치에 관한 도면,
도 2는 장치의 세로 단면도,
도 3은 사용시 장치의 등가 전기회로도를 도시한다.
본 발명에 따르면, 손잡이, 손잡이로부터 돌출된 하나의 치료 전극을 구비한 단일전극 유닛, 및 손잡이 내부의 무선 주파수 제너레이터를 포함한 전기수술용 기구가 제공되고,그 제너레이터는 출력접점이 전극에 연결된 하나의 무선 주파수 출력 접점을 가진다. 제너레이터는 종래의 것과 다르게 외부 소자와 분리되어 있다. 특히, 예를 들어, 제너레이터는 접지 소자 또는 귀로패드에 다른 어떤 무선 주파수 출력 접점을 갖고 있지 않다. 손잡이내에 제너레이터를 제공함으로써 케이블을 통해 무선 주파수 전류를 공급하는 효과로 인한 예측할 수 없는 임피던스 변화를 피할 수 있다. 무선 주파수 귀로 전류는 제너레이터를 둘러싼 전도실드를 통해 환자와 제너레이터간을 표유 용량 커플링되어 통과한다.
제너레이터의 동작 주파수는 5MHz 이상이 바람직하다. 주파수가 높아질수록, 증가된 주파수에서 귀로의 감소된 리액턴스에 의한 도달가능한 전류 레벨은 더 커진다. 제너레이터는 손잡이내의 배터리로부터 전원을 얻을 수 있다. 이것은 인터페이스의 방사를 최소화한다.
전기적 전도실드가 제너레이터를 둘러쌈으로써 여러방식으로 손잡이를 잡는 사용자에 의해 야기된 표유 용량의 변화를 최소화한다. 그 실드는 제너레이터로부터 분리되는 것이 바람직하고, 예를 들어 금속케이스형태로 튜브모양의 손잡이를 형성하거나, 손잡이 본체는 전도실드를 제공하기 위해 금속화된 전기적 절연물질로 형성될 수 있다.
금속화된 층이 손잡이의 본체 외부에 있거나 본체 자체가 금속이든지 간에,외부금속표면은 전기적 절연 외부층으로 구비되는 것이 바람직하다. 관련된 제너레이터 전도체와 실드사이의 커패시턴스가 일정하기 때문에 실드를 제공함으로서 표유 용량이 감소되고,그 실드는 환자와 용량성 커플링된 일정영역의 전도성 신체를 형성시킨다.
본 발명은 또한 상기 설명처럼 기구를 사용하여 생명체에 전기수술용 에너지를 공급하는 방법을 포함한다. 이 방법은 신체 접촉부위에 전극을 설치하는 단계, 및 제너레이터를 가동시키는 단계와 제너레이터와 신체 사이의 표유 용량이 무선 주파수 전류 귀로를 제공하는 단계를 포함한다.
본 발명은 도면을 참조로 예를 들어 설명될 것이다.
도 1에서, 발명에 따른 장치는 도시된 바와같이, 연필모양의 가늘고 긴 원통형 손잡이(10)를 포함한다. 손잡이 한쪽 끝 부분(10A)은 점점 가늘어지며, 하나의 치료전극(12)의 형태인 전극유닛은 그 끝부분으로부터 축방향으로 돌출되어 환자의신체(14)와 접촉되도록 한다. 작동스위치(16)는 가늘어진 끝부분(10A)에 제공된다. 손잡이의 본체(10)는 판금으로 형성될 수 있고, 예를 들면 얇은 물질로 된 절연 덮개가 함께 제공될 수 있다. 이것 대신으로, 손잡이의 본체(10)는 전기적 절연 플라스틱 물질로 몰딩될 수 있으며, 내부 또는 외부 표면을 금속으로 만들수 있다. 외부표면이 금속이라면 사용자의 손을 금속과 분리시키기 위해 전기적 절연코팅이 제공된다.
도 2의 단면도에서, 전도실드(10S)와 절연케이스(10C)를 포함한 손잡이의 본체(10)가 도시된다. 무선 주파수 제너레이터와 배터리를 포함하는 내부전자유닛(18)은 실드(10S)내부에 포함된다. 도시된 것처럼 전자유닛(18)이 실드에(10C)의해 완전히 둘러쌓일 필요는 없지만, 최소한 제너레이터 부분은 실드의 길이 정도에 의존한다는 것이 바람직하다. 실드(10C)는 다수의 유용한 특성을 가진다. 내부전자유닛(18)은 접지에 따라 상이한 전위를 가지며 일정하지 않은 모양으로 케이스내에 분포되어 있다. 실드(10C)는 동일한 전위를 가진 균일한 표면을 제공한다. 절연층(10I)의 크기 및 두께를 최소화함으로써, 실드의 크기는 최대화될 수 있으며, 환자, 사용자 및 접지된 외부 물체간의 용량성 커플링도 최대화될 수 있다.
주변을 둘러싼 연속적인 실드를 만듬으로써, 내부전자는 RF방사레벨을 잠재적으로 간섭하는 것에 대해서도 역시 효과적으로 차폐된다. 실드 기능을 제공하는 금속으로 케이스를 만드는 것은 그 실드가 일정하게 열을 확산시켜, 이에 따라 비효율로 인한 전자 유닛내에 발생된 전력의 감소를 개선시킨다는 점에서 또 다른 이점이 있다.
도 3에서는 사용중인 기구의 등가회로를 도시한다. 손잡이의 본체 내부에는 주파수 5MHz 이상(스위치(16)와 실드(10S)는 도 3에 도시되지 않음)에서 작동 가능한 무선 주파수(RF) 제너레이터(18G)가 제공된다. 제너레이터는 전극(12)(도 1)에 연결된 출력접점을 갖고 있고, 다른 출력접점은 가지고 있지 않다. 제너레이터(18G)(구성요소는 도 3에서 부재번호(20)로 도시되어 있다)의 전도 소자는 도 3에서 제 2안테나로 표시된 안테나(22)로서 동작하며, 커패시턴스(24)를 거쳐 간접적으로 손잡이 본체(10)(도 1 및 2)의 전도실드(10S)를 통해 환자와 용량성 커플링이 되어 있다. 조직 인터페이스에 대한 전극은 라인(26)으로 표시된다. 따라서, 사용중인 경우, 제너레이터(18)의 능동 출력 접점은 활성화된 조직을 통해 환자(14)에게 접속되고, 이 조직의 저항은 도 3의 저항(28)으로 표시된다. 이 저항값은 전형적으로 1kΩ이고 100Ω까지 떨어질 수 있다.
제너레이터(18G)에서 나온 도체(20)는 제너레이터에서 실드로 그리고 실드에서 사용자 간의 커패시턴스로 직렬 결합된 커패시턴스(30)에 의해 사용자와 용량성 연결이 되고 다시, 사용자(32)는 커패시터(34)로 의해 표시된 접지와 용량성 커플링된다. 도 3의 커패시터(36)로 표시된 바와같이, 환자(14)는 접지와 용량성 커플링되어 있기 때문에, 사용자(32)와 환자(14)간에는 직접적이고 간접적인 용량성 경로가 존재한다. 유사하게, 손잡이 본체(10)(특히 실드(10S))의 커패시턴스(38)를 통해 제너레이터 전도 소자(20)로부터 접지까지 및 환자(14)와 접지간의 직렬 커패시턴스(36)까지 간접 경로가 있다. 직접적인 제너레이터(18G)와 환자 커패시턴스(24), 손잡이의 본체와 사용자 커패시턴스(30), 사용자와 접지, 본체와 접지 및 환자와 접지 커패시턴스(34,38 및 36)각각으로부터 발생되는 제너레이터(18G)와 환자(14)간의 총 커패시턴스는 최소한 15pF이다.
손잡이의 본체(10)내에 하우징되어 있는 배터리는 도면에 도시되어 있지 않다. 이것은 전극(12)으로부터 본체(10)의 타단에 있는 단자를 통해 재충전할 수 있는 흔히 쓰이는 니켈카드뮴 또는 리튬이온 배터리이다.
이 장치는 한가지 용도로만 사용하는 것이 아니라 궁극적으로는 척추, 신경, 성형, 이비인후, 치과수술 및 진료과정과 같은 외과 수술을 수월히 해내기 위한 것이다.
Claims (11)
- 손잡이, 손잡이로부터 돌출된 하나의 치료 전극을 가진 단일전극유닛 및 손잡이내의 무선 주파수 제너레이터를 포함하고, 제너레이터는 전극에 무선 주파수 출력 접점을 가지고 다른 어떤 무선 주파수 출력 접점은 갖지 아니하며, 손잡이는 발전기를 둘러싼 전기적 전도실드를 제너레이터와 그 주변간의 전기용량성 커플링된 소자로서 포함하는 것을 특징으로 하는 전기수술용 장치.
- 제 1 항에 있어서, 제너레이터의 작동 주파수가 5MHz 이상인 것을 특징으로 하는 전기수술용 장치.
- 제 1 항 또는 제 2 항에 있어서, 제너레이터가 손잡이내의 배터리로부터 전원을 공급받는 것을 특징으로 하는 전기수술용 장치.
- 제 1 내지 제 3 항중 어느 한항에 있어서, 제너레이터가 손잡이 밖의 소자와 분리되어 있는 것을 특징으로 하는 전기수술용 장치.
- 제 1 항에 있어서, 실드가 제너레이터와 분리되어 있는 것을 특징으로 하는 전기수술용 장치.
- 제 1 내지 제 5 항중 어느 한항에 있어서, 실드가 손잡이의 본체를 형성하는 것을 특징으로 하는 전기수술용 장치.
- 제 6 항에 있어서, 손잡이의 본체는 본체의 외부 표면이 절연실드로 형성된 금속튜브인 것을 특징으로 하는 전기수술용 장치.
- 제 1 내지 제 5 항중 어느 한항에 있어서, 실드는 일반적으로 튜브모양이고 제너레이터는 실드 길이내에 포함되는 것을 특징으로 하는 전기수술용 장치.
- 제 1 내지 제 5 항중 어느 한항에 있어서, 손잡이는 전기적 절연물질로 형성된 손잡이 본체를 가지며 실드는 손잡이 본체에 있는 금속층인 것을 특징으로 하는 전기수술용 장치.
- 제 9 항에 있어서, 금속층이 손잡이의 본체 외부에 형성되고 외부 전기절연층에 의해 커버되는 것을 특징으로 하는 전기수술용 장치.
- 제 1 항의 장치의 전극을 신체와 접촉하도록 위치시키는 단계 및 제너레이터를 작동시키는 단계를 포함하고, 제너레이터와 신체간 표유 용량이 무선 주파수 전류 귀로를 제공하는 것을 특징으로 하는 생명체에 전기수술용 에너지를 사용하는 방법.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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GB9521772.5 | 1995-10-24 | ||
GBGB9521772.5A GB9521772D0 (en) | 1995-10-24 | 1995-10-24 | An electrosurgical instrument |
PCT/GB1996/002577 WO1997015237A1 (en) | 1995-10-24 | 1996-10-21 | Electrosurgical hand-held battery-operated instrument |
Publications (1)
Publication Number | Publication Date |
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KR19990067035A true KR19990067035A (ko) | 1999-08-16 |
Family
ID=10782829
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR1019980702972A KR19990067035A (ko) | 1995-10-24 | 1996-10-21 | 배터리로 동작되는 전기수술용 휴대용 장치 |
Country Status (10)
Country | Link |
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US (1) | US6039734A (ko) |
EP (1) | EP0858295B1 (ko) |
JP (1) | JP2001507247A (ko) |
KR (1) | KR19990067035A (ko) |
AU (1) | AU721066B2 (ko) |
BR (1) | BR9611197A (ko) |
CA (1) | CA2235488A1 (ko) |
DE (1) | DE69625502T2 (ko) |
GB (1) | GB9521772D0 (ko) |
WO (1) | WO1997015237A1 (ko) |
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-
1995
- 1995-10-24 GB GBGB9521772.5A patent/GB9521772D0/en active Pending
-
1996
- 1996-10-21 KR KR1019980702972A patent/KR19990067035A/ko not_active Application Discontinuation
- 1996-10-21 US US09/065,091 patent/US6039734A/en not_active Expired - Lifetime
- 1996-10-21 DE DE69625502T patent/DE69625502T2/de not_active Expired - Lifetime
- 1996-10-21 BR BR9611197A patent/BR9611197A/pt not_active Application Discontinuation
- 1996-10-21 WO PCT/GB1996/002577 patent/WO1997015237A1/en not_active Application Discontinuation
- 1996-10-21 CA CA002235488A patent/CA2235488A1/en not_active Abandoned
- 1996-10-21 AU AU73152/96A patent/AU721066B2/en not_active Ceased
- 1996-10-21 JP JP51639197A patent/JP2001507247A/ja active Pending
- 1996-10-21 EP EP96935052A patent/EP0858295B1/en not_active Expired - Lifetime
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MX9803194A (es) | 1998-09-30 |
US6039734A (en) | 2000-03-21 |
AU7315296A (en) | 1997-05-15 |
CA2235488A1 (en) | 1997-05-01 |
GB9521772D0 (en) | 1996-01-03 |
JP2001507247A (ja) | 2001-06-05 |
BR9611197A (pt) | 1999-04-06 |
AU721066B2 (en) | 2000-06-22 |
DE69625502D1 (de) | 2003-01-30 |
DE69625502T2 (de) | 2003-09-11 |
EP0858295A1 (en) | 1998-08-19 |
EP0858295B1 (en) | 2002-12-18 |
WO1997015237A1 (en) | 1997-05-01 |
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