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JPS62211060A - High frequency treatment tool - Google Patents

High frequency treatment tool

Info

Publication number
JPS62211060A
JPS62211060A JP61054143A JP5414386A JPS62211060A JP S62211060 A JPS62211060 A JP S62211060A JP 61054143 A JP61054143 A JP 61054143A JP 5414386 A JP5414386 A JP 5414386A JP S62211060 A JPS62211060 A JP S62211060A
Authority
JP
Japan
Prior art keywords
frequency
electrode
flexible tube
wire
treatment
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.)
Pending
Application number
JP61054143A
Other languages
Japanese (ja)
Inventor
潤 松本
俊夫 河瀬
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.)
Olympus Corp
Original Assignee
Olympus Optical 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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP61054143A priority Critical patent/JPS62211060A/en
Priority to DE19873707820 priority patent/DE3707820C2/en
Publication of JPS62211060A publication Critical patent/JPS62211060A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • A61B18/1442—Probes having pivoting end effectors, e.g. forceps
    • A61B18/1445—Probes having pivoting end effectors, e.g. forceps at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Instruments for taking body samples for diagnostic purposes; Other methods or instruments for diagnosis, e.g. for vaccination diagnosis, sex determination or ovulation-period determination; Throat striking implements
    • A61B10/02—Instruments for taking cell samples or for biopsy
    • A61B10/06—Biopsy forceps, e.g. with cup-shaped jaws
    • 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
    • A61B18/1402—Probes for open surgery
    • 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
    • A61B18/148—Probes or electrodes therefor having a short, rigid shaft for accessing the inner body transcutaneously, e.g. for neurosurgery or arthroscopy
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/00234—Surgical instruments, devices or methods for minimally invasive surgery
    • A61B2017/00292—Surgical instruments, devices or methods for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B2017/00831—Material properties
    • A61B2017/0088—Material properties ceramic
    • 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
    • A61B2018/00107—Coatings on the energy applicator
    • 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
    • A61B2018/00184—Moving parts
    • A61B2018/00196—Moving parts reciprocating lengthwise
    • 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
    • A61B2018/1407—Loop
    • 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
    • A61B2018/144—Wire

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Veterinary Medicine (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Public Health (AREA)
  • Cardiology (AREA)
  • Surgical Instruments (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本願発明は、体腔内の組織に電極を接触させて高周波電
流を流すことにより処置を施す高周波処置具の改良に関
する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an improvement in a high-frequency treatment instrument that performs treatment by bringing an electrode into contact with tissue in a body cavity and passing a high-frequency current through the tissue.

［従来の技術］ 内視鏡を利用して使用する処置具として高周波を利用し
た処置具がある。従来、第６図に示されるように高周波
処置具１は内？１鏡の鉗子チャンネルを通して体腔内に
挿入される可撓性チューブ２と、この可撓性チューブ２
の後端に連結され第１の指掛は部３を有した固定具４と
、第２の指掛は部５を有し固定具４に摺動自在なスライ
ダ６と、このスライダ６に接続される処置電極７とで構
成されている。処置を行う際には、スライダ６の接続端
子８と高周波電１１！（図示しない）と接続し、患者に
高周波電源と接続された患者電極を接触させる。そして
、高周波処置具１の可撓性チューブ２を体腔内に挿入し
、処置を施す目的部位まで誘導する。スライダ６を押し
出すと可撓性チューブ２を通じて処置電極７が露出され
、その処置電極７を目的部位に接触させて高周波電流を
流すことで、患者電極と処置電極７との間に高周波電流
が流れて人体組織の目的部位を焼灼や凝固処置が施され
る。[Prior Art] There is a treatment tool that uses high frequency as a treatment tool that is used using an endoscope. Conventionally, as shown in FIG. 6, the high-frequency treatment instrument 1 has been used internally. 1 a flexible tube 2 inserted into the body cavity through the forceps channel of the mirror;
A fixture 4 connected to the rear end and having a first finger rest having a portion 3, a slider 6 having a second finger rest having a portion 5 and slidable on the fixture 4, and connected to the slider 6. and a treatment electrode 7. When performing treatment, connect the connecting terminal 8 of the slider 6 and the high-frequency electric field 11! (not shown) and bring the patient electrode connected to the high frequency power supply into contact with the patient. Then, the flexible tube 2 of the high-frequency treatment instrument 1 is inserted into the body cavity and guided to the target site to be treated. When the slider 6 is pushed out, the treatment electrode 7 is exposed through the flexible tube 2, and by bringing the treatment electrode 7 into contact with the target area and flowing a high frequency current, a high frequency current flows between the patient electrode and the treatment electrode 7. cauterize or coagulate the target body tissue.

しかしながら、この種の高周波処置具はその使用中にお
いて、焼灼された人体組織が炭化し処置電極７の表面に
付着して焼灼や凝固処置が阻害されたり、処置電極７が
浸蝕されることがあった。However, during use of this type of high-frequency treatment instrument, the cauterized human tissue may become carbonized and adhere to the surface of the treatment electrode 7, which may impede the cauterization or coagulation treatment or erode the treatment electrode 7. Ta.

そこで、実開昭５８−９１１０号公報に示されるように
電極ワイヤの表面にＡｕメッキを施し、人体組織の付着
を防止するものが提案されている。Therefore, as shown in Japanese Utility Model Application Publication No. 58-9110, it has been proposed that the surface of the electrode wire be plated with Au to prevent the adhesion of human tissue.

［発明が解決おようとする問題点］ しかしながら従来の技術においては、高周波処置具の電
極は使用時において高熱になるため、上記Ａｕメッキが
溶融するおそれがある。そのため、Ａｕメッキの剥離が
起きやすく、その経時的耐久性に乏しいものであった。[Problems to be Solved by the Invention] However, in the conventional technology, the electrodes of the high-frequency treatment instrument become extremely hot during use, so there is a risk that the Au plating may melt. Therefore, the Au plating was likely to peel off, and its durability over time was poor.

さらに、高価なＡｕメッキを施するために価格的にも高
くなるという問題点があった。Furthermore, since expensive Au plating is applied, there is a problem in that the price is also high.

本願発明はこのような問題点に着目してなされたもので
、その目的とするところは人体組織に対する耐付着性、
耐熱性、耐蝕性を確保向上するとともに安価な高周波処
置具を提供することにある。The present invention was made with attention to these problems, and its purpose is to improve adhesion resistance to human tissue,
The object of the present invention is to provide an inexpensive high-frequency treatment instrument that ensures and improves heat resistance and corrosion resistance.

［問題点を解決するための手段］ 高周波処置具の電極にセラミックコーティングする。[Means for solving problems] Ceramic coating is applied to the electrodes of high-frequency treatment instruments.

［作　用］ そのため、使用時において上記電極に炭化された人体組
織の付着がない。また電極は高熱と浸蝕に耐える。[Function] Therefore, there is no adhesion of carbonized human tissue to the electrode during use. The electrodes also resist high heat and erosion.

［実施例］ 第１図及び第２図は本願発明の第１実施例を示す図であ
る。第１図は高周波処置具先端部の部分断面図であり、
体腔内にできたポリープを切除する高周波スネアワイヤ
である。[Embodiment] FIGS. 1 and 2 are diagrams showing a first embodiment of the present invention. FIG. 1 is a partial cross-sectional view of the tip of the high-frequency treatment instrument;
This is a high-frequency snare wire that removes polyps that form inside body cavities.

電気絶縁性の樹脂からなる可撓性チューブ２内に処置電
極を形成するスネアワイヤ１０が挿通されている。この
スネアワイヤ１ｏは、一端は可撓性チューブ２内を摺動
するストッパ部材１２に固定され、他端は屈曲部１１に
より折返してストッパ部材１２の挿通孔を挿通して第６
図に示されている通りにスライダ６と連結固定されてい
る。そして、ス［−ツバ部材１２の先端側の可撓性チュ
ーブ２の内面にはストッパ部材１２と当接する規制部材
１３が固設されている。A snare wire 10 forming a treatment electrode is inserted into a flexible tube 2 made of electrically insulating resin. One end of the snare wire 1o is fixed to a stopper member 12 that slides inside the flexible tube 2, and the other end is folded back by a bending portion 11 and inserted through an insertion hole of the stopper member 12.
It is connected and fixed to the slider 6 as shown in the figure. A regulating member 13 that comes into contact with the stopper member 12 is fixed on the inner surface of the flexible tube 2 on the distal end side of the collar member 12 .

スネアワイヤ１０はスライダ６を押し出すと可撓性チュ
ーブ２の先端部より、屈曲部１１により一方向に膨出し
て切除部が形成される。少なくともこの切除部は第２図
に示されるように、金属性の導電部材からなる導電性ワ
イヤ１０ａにセラミック１０ｂがコーティングされてい
る。When the snare wire 10 pushes out the slider 6, the snare wire 10 bulges in one direction from the distal end of the flexible tube 2 by the bent portion 11 to form a cut portion. At least in this cutout portion, as shown in FIG. 2, a conductive wire 10a made of a metallic conductive member is coated with a ceramic 10b.

このセラミック１０ｂは５〜６０μ−の薄膜で塗布され
て、耐熱性、ｉ４蝕性、耐摩潤性などの特性を有してい
る。This ceramic 10b is coated with a thin film of 5 to 60 microns and has properties such as heat resistance, i4 corrosion resistance, and abrasion resistance.

尚、セラミックコーティングは切除部だけでなく導電性
ワイヤ全体に施しても良い。Note that the ceramic coating may be applied not only to the cut portion but also to the entire conductive wire.

次に上述した構成に基づく作用を説明する。Next, the operation based on the above-described configuration will be explained.

予めスネアワイヤ１０を可撓性チューブ２内に収納し、
処置具１を体腔内に挿入する。可撓性チューブ２の先端
を目的部位に近づけ、スライダ６を押し出しスネアワイ
ヤ１０を露出させてポリープに引っ掛ける。次に、スラ
イダ６を引き込むとスネアワイヤ１０はポリープを挾み
込む。そして高周波電流を流すことでポリープは切除さ
れる。The snare wire 10 is stored in the flexible tube 2 in advance,
The treatment instrument 1 is inserted into the body cavity. The tip of the flexible tube 2 is brought close to the target site, the slider 6 is pushed out, the snare wire 10 is exposed, and the snare wire 10 is hooked onto the polyp. Next, when the slider 6 is pulled in, the snare wire 10 pinches the polyp. The polyp is then removed by applying a high-frequency current.

第１実鹿例の効果として、スネアワイヤ１０はセラミッ
クコーティングされているので、その材料の性質上組織
の付着が起らない。したがって、常に良好な状態で高周
波切除を行うことができる。ざらに、耐熱性に優れてい
るので熱による溶融や剥離を起こすことなく、耐蝕性に
も優れている。As an advantage of the first example, since the snare wire 10 is coated with ceramic, tissue does not adhere to it due to the nature of the material. Therefore, high frequency ablation can always be performed under good conditions. Furthermore, it has excellent heat resistance, so it does not melt or peel due to heat, and it also has excellent corrosion resistance.

第３図は第２実ｍ例を示す部分断面図で、狭窄部位を切
開するための釘型ナイフの高周波切開具である。第１実
施例と同一の部分には同一の符号を付し、詳細は省略す
る。FIG. 3 is a partial sectional view showing a second example, which is a nail-shaped knife high-frequency incision tool for incising a stenotic site. The same parts as in the first embodiment are given the same reference numerals, and details will be omitted.

電気絶縁性の可撓性チューブ２内に導電性ワイヤ１４が
挿通し、この導電性ワイヤ１４は先端に電極を形成する
セラミックコーティングされた釘型ナイフ１５が固１さ
れ、その後端はスライダ６が連結固定されている。モし
て可撓性チューブ２に規制部材１６が固設され、この規
制部材１３と当接する釘型ナイフ１５の段部よりストッ
パ面１７が形成されている。A conductive wire 14 is inserted into the electrically insulating flexible tube 2, and a ceramic-coated nail-shaped knife 15 that forms an electrode is fixed to the tip of the conductive wire 14, and a slider 6 is attached to the rear end of the conductive wire 14. Connection is fixed. A regulating member 16 is fixed to the flexible tube 2, and a stopper surface 17 is formed from the stepped portion of the nail-shaped knife 15 that comes into contact with the regulating member 13.

以上述べた構成により、釘型ナイフの高周波切開具は体
腔内にできた狭窄部位に釘型ナイフ１５を押し付けて切
開を行なうもので、その使用時において、釘型ナイフ１
５は炭化された人体ｖＡ織が付着されることがない。With the configuration described above, the nail-shaped knife high-frequency incision tool presses the nail-shaped knife 15 into the stenotic site created in the body cavity to make an incision.
5, carbonized human vA tissue is not attached.

第４図は第３実施例を示す部分断面図で、狭窄部位を切
開するためのワイヤ型の高周波切開具である。FIG. 4 is a partial sectional view showing a third embodiment, which is a wire-type high-frequency incision tool for incising a stenotic site.

電気絶縁性の可撓性チューブ２に挿通孔２ａ、２ｂが穿
設されている。この可撓性チューブ２内にスライダ６と
連結固定された電極ワイヤ１８が一旦挿通孔２ａより外
へ露出され、再び挿通孔２ｂより可撓性チューブ２内に
挿通され、可撓性チューブ２の先端に固設された固定リ
ング１９に固定されている。そして、その電極ワイヤ１
８はセラミックコーティングが施されている。An electrically insulating flexible tube 2 is provided with insertion holes 2a and 2b. The electrode wire 18 connected and fixed to the slider 6 inside the flexible tube 2 is once exposed outside through the insertion hole 2a, and then inserted into the flexible tube 2 through the insertion hole 2b again. It is fixed to a fixing ring 19 fixed to the tip. And the electrode wire 1
8 has a ceramic coating.

以上述べた構成により、ワイヤ型の高周波処置具を狭窄
部位に位置させて、その電極ワイヤ１８を膨出させて高
周波電流を流し狭窄部位を切開するものである。With the above-described configuration, the wire-type high-frequency treatment tool is positioned at the stenosis site, the electrode wire 18 is expanded, and a high-frequency current is applied to incise the stenosis site.

第５図は第４実施例を示す部分断面図で、内視鏡的に止
血するための高周波凝固子である。FIG. 5 is a partial sectional view showing a fourth embodiment, which is a high-frequency coagulator for endoscopically stopping bleeding.

高周波凝固子は、電気絶縁性の可撓性チューブ２と、こ
の可撓性チューブ２の先端にセラミックコーティングさ
れた金属性の凝固子２０が固設または着脱自在に設けら
れている。The high-frequency coagulator includes an electrically insulating flexible tube 2 and a ceramic-coated metal coagulator 20 fixedly or detachably provided at the tip of the flexible tube 2.

そして操作部から高周波電流を流す導線が凝固子２０に
接続されている。A conductive wire through which a high frequency current flows from the operating section is connected to the coagulator 20.

以上述べた構成により高周波凝固子は出血部位に凝固子
２０を当てて高周波電流を流して止血を行うものである
。With the configuration described above, the high-frequency coagulator applies the coagulator 20 to a bleeding site and applies a high-frequency current to the bleeding site to stop the bleeding.

［発明の効果］ 以上述べたように本発明によれば、高周波処置具の電極
をセラミックコーティングを施したため、その使用時に
おいて、炭化された人体組織が電極に付着することがな
い。ざらに、この電極の耐熱性、耐蝕性が確保され向上
する。また、電極はセラミックをコーティングするので
安価に提供できる。[Effects of the Invention] As described above, according to the present invention, since the electrode of the high-frequency treatment instrument is coated with a ceramic coating, carbonized human tissue does not adhere to the electrode during use. In general, the heat resistance and corrosion resistance of this electrode are ensured and improved. Furthermore, since the electrodes are coated with ceramic, they can be provided at low cost.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は第１実施例を示す部分断面図、第２図は第１図
のＡＡ断面図、第３図は第２実施例を示す部分断面図、
第４図は第３実施例を示す部分断面図、第５図は第４実
施例を示す部分断面図、第６図は従来例を示す全体図で
ある。FIG. 1 is a partial sectional view showing the first embodiment, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is a partial sectional view showing the second embodiment.
FIG. 4 is a partial sectional view showing the third embodiment, FIG. 5 is a partial sectional view showing the fourth embodiment, and FIG. 6 is an overall view showing the conventional example.

Claims (1)

【特許請求の範囲】 電極を組織に接触させて高周波電流を流す ことにより処置する高周波処置具において、上記電極は
セラミックコーティングされたことを特徴とする高周波
処置具。[Scope of Claims] A high-frequency treatment device that performs treatment by bringing an electrode into contact with tissue and flowing a high-frequency current, characterized in that the electrode is coated with a ceramic.
JP61054143A 1986-03-12 1986-03-12 High frequency treatment tool Pending JPS62211060A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP61054143A JPS62211060A (en) 1986-03-12 1986-03-12 High frequency treatment tool
DE19873707820 DE3707820C2 (en) 1986-03-12 1987-03-11 High frequency medical treatment instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61054143A JPS62211060A (en) 1986-03-12 1986-03-12 High frequency treatment tool

Publications (1)

Publication Number Publication Date
JPS62211060A true JPS62211060A (en) 1987-09-17

Family

ID=12962333

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61054143A Pending JPS62211060A (en) 1986-03-12 1986-03-12 High frequency treatment tool

Country Status (2)

Country Link
JP (1) JPS62211060A (en)
DE (1) DE3707820C2 (en)

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Also Published As

Publication number Publication date
DE3707820A1 (en) 1987-09-17
DE3707820C2 (en) 1997-02-13

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