JPS6160699B2 - - Google Patents
Info
- Publication number
- JPS6160699B2 JPS6160699B2 JP55097826A JP9782680A JPS6160699B2 JP S6160699 B2 JPS6160699 B2 JP S6160699B2 JP 55097826 A JP55097826 A JP 55097826A JP 9782680 A JP9782680 A JP 9782680A JP S6160699 B2 JPS6160699 B2 JP S6160699B2
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric element
- mechanical vibration
- tip
- treatment instrument
- stone
- 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.)
- Expired
Links
- 239000004575 stone Substances 0.000 claims description 13
- 230000006378 damage Effects 0.000 claims description 7
- 230000035939 shock Effects 0.000 claims description 4
- 239000012212 insulator Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- NKZSPGSOXYXWQA-UHFFFAOYSA-N dioxido(oxo)titanium;lead(2+) Chemical compound [Pb+2].[O-][Ti]([O-])=O NKZSPGSOXYXWQA-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
Landscapes
- Surgical Instruments (AREA)
Description
【発明の詳細な説明】
この発明は体腔内の結石を放電エネルギによる
衝撃波で破壊する結石破壊装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stone destruction device that destroys stones in a body cavity using shock waves generated by discharge energy.
体腔内の結石を破壊する手段として放電エネル
ギを採用する方法が知られている。これは液体内
で放電させ、そのときのエネルギが液体を振動さ
せ、結石を破壊する方法であるが、従来は、外部
に設けた高圧電源からプローブを通して、その先
端部に設けた電極に給電し、放電させるようにな
つている。 A method is known in which discharge energy is used as a means of destroying stones within a body cavity. This is a method in which a discharge is generated within the liquid, and the energy generated at that time vibrates the liquid and destroys the stone. Conventionally, electricity is supplied from an external high-voltage power source through the probe to an electrode placed at the tip of the probe. , it is designed to discharge electricity.
したがつて、高電圧は長いプローブを介して先
端部に設けた電極を給電させるため、プローブが
老化すると、生体に高電圧が漏れるという危険性
がある。 Therefore, since high voltage is supplied to the electrode provided at the tip via the long probe, there is a risk that the high voltage may leak into the living body as the probe ages.
この発明は上記事情に着目してなされたもの
で、その目的とするところは、処置具の先端部に
圧電素子を設け、この圧電素子により高電圧を発
生させることにより、高電圧の漏れを防止するこ
とができる安全性の高い結石破壊装置を提供しよ
うとするものである。 This invention was made in view of the above circumstances, and its purpose is to prevent leakage of high voltage by providing a piezoelectric element at the tip of the treatment instrument and generating high voltage with this piezoelectric element. The purpose of this invention is to provide a highly safe stone destruction device that can
以下、この発明を図面に示す実施例にもとずい
て説明する。第１図および第２図は第１の実施例
を示し、１は処置具である。この処置具は可撓性
を有する絶縁チユーブによつて形成され、この先
端部には絶縁物２が固定されている。そして、こ
の絶縁物２には圧電素子３が埋設されている。こ
の圧電素子３はジルコン酸、チタン酸鉛等よりな
り、駆動部４の上下面に銀焼付などで入力用電極
５，５が設けられている。そして、これら入力用
電極５，５にはリード線６，６の一端が接続され
ている。また、これらリード線６，６の他端は上
記処置具１内を挿通して外部に設置した電源７に
接続されている。さらに、上記圧電素子３の駆動
部４には発電部８が設けられ、この発電部８の端
面と上記駆動部４にはそれぞれ上記絶縁物２の前
端面から突出する電極９，９が並設されている。 The present invention will be explained below based on embodiments shown in the drawings. FIG. 1 and FIG. 2 show a first embodiment, and 1 is a treatment instrument. This treatment tool is formed of a flexible insulating tube, and an insulator 2 is fixed to the tip of the tube. A piezoelectric element 3 is embedded in this insulator 2. This piezoelectric element 3 is made of zirconate, lead titanate, etc., and input electrodes 5 are provided on the upper and lower surfaces of the drive section 4 by silver baking or the like. One ends of lead wires 6, 6 are connected to these input electrodes 5, 5. The other ends of these lead wires 6, 6 are inserted through the treatment instrument 1 and connected to a power source 7 installed outside. Further, the drive section 4 of the piezoelectric element 3 is provided with a power generation section 8, and electrodes 9, 9 protruding from the front end surface of the insulator 2 are arranged in parallel on the end surface of the power generation section 8 and the drive section 4, respectively. has been done.
このように構成された結石破壊装置の使用に際
しては、まず、処置具１をたとえば内視鏡の鉗子
チヤンネルを案内として体腔内に挿入し、体腔壁
１０内部の結石１１に電極９，９を対向させる。
この状態で、電源７より低電圧を入力すると、圧
電素子３の発電部８に起動力が生じる。今、駆動
部４と発電部８の長さが等しくこれをＬとすれば
固有振動周波数ｆは長さ2Lにより決定され、圧
電素子３内での音速をＣとすれば、ｆ＝Ｃ／４Ｌによ
つて表わされる。そこで、圧電素子３に固有振動
周波数ｆを持つ入力電圧を電源７によつて加える
と、駆動部４は電歪効果により長さ方向に強い機
械振動が生じる。この機械振動は発電部８に伝達
され、圧電効果により起電力が生じる。この起電
力は長さ方向の共振を利用するので昇圧特性を持
つ。したがつて、駆動部４に数ボルトの電圧V1
を印加すると、発電部８には数キロボルトの起動
力V2が生じ、この起電力は電極９，９に伝えら
れ、ここで放電する。この放電エネルギは体内壁
１０内部の液体に衝撃波を生じさせ、結石１１を
破壊させることになる。 When using the stone destruction device configured as described above, first, the treatment instrument 1 is inserted into the body cavity using, for example, the forceps channel of an endoscope as a guide, and the electrodes 9, 9 are opposed to the stone 11 inside the body cavity wall 10. let
In this state, when a low voltage is input from the power source 7, a starting force is generated in the power generation section 8 of the piezoelectric element 3. Now, if the driving part 4 and the power generating part 8 have the same length and this is L, the natural vibration frequency f is determined by the length 2L, and if the sound speed inside the piezoelectric element 3 is C, then f=C/4L It is represented by. Therefore, when an input voltage having a natural vibration frequency f is applied to the piezoelectric element 3 by the power source 7, strong mechanical vibration is generated in the length direction of the drive section 4 due to the electrostrictive effect. This mechanical vibration is transmitted to the power generation section 8, and an electromotive force is generated due to the piezoelectric effect. This electromotive force utilizes resonance in the length direction, so it has boost characteristics. Therefore, a voltage V 1 of several volts is applied to the drive 4.
When applied, a starting force V 2 of several kilovolts is generated in the power generating section 8, and this electromotive force is transmitted to the electrodes 9, 9, where it is discharged. This discharge energy generates a shock wave in the liquid inside the body wall 10, causing the stone 11 to break.
このように、処置具１の先端部に設けた圧電素
子３に外部に設置した電源７から低電圧を印加す
ることにより機械的振動を与え、その機械振動に
よつて起動力を発生させることができる。したが
つて、処置具１の先端部以外は低電圧しか印加さ
れないことになり、安全性を向上することができ
る。 In this way, by applying a low voltage from the externally installed power source 7 to the piezoelectric element 3 provided at the tip of the treatment instrument 1, mechanical vibration can be applied, and a starting force can be generated by the mechanical vibration. can. Therefore, only a low voltage is applied to the parts other than the tip of the treatment tool 1, and safety can be improved.
第３図および第４図は第２の実施例を示すもの
で、１２は処置具である。この処置具１２の先端
部には絶縁物１３が設けられている。この処置具
１２の先端側内部には両端に電極板１４，１５を
有する圧電素子１６が収納され、一方の電極板１
４は上記絶縁物１３に埋設固定されている。さら
に、圧電素子１６の電極板１４，１５にはそれぞ
れ電極１７，１７が接続され、これら電極１７，
１７は上記絶縁部１３の前端面より突出して並設
されている。また、上記他方の電極板１５には絶
縁板１８が設けられ、この絶縁板１８は後述する
衝撃付与機構１９と対向している。この衝撃付与
機構１９について説明すると、上記処置具１２の
内部には長手方向に離間する一対の固定部２０，
２１が設けられている。そして、この一方の固定
部２０の中央部には透孔２２が穿設され、この透
孔２２には可動部材２３に設けたシヤフト２４が
軸方向スライド自在に支承されている。さらに、
このシヤフト２４の他端には上記圧電素子１６の
絶縁板１８と対向する衝撃部材２５が設けられて
いる。また、上記固定部２０，２１間における処
置具１２内にはコイルスプリング２６が収納さ
れ、この一端は固定部２１，他端は上記可動部材
２３に圧接されている。したがつて、可動部材２
３はコイルスプリング２６の復元力によつて常に
圧電素子１６方向へ付勢されている。また、２７
は操作部２８を有する操作ワイヤで、これは処置
具１２の末端から固定部２１およびコイルスプリ
ング２６を挿通して可動部材２３に固着されてい
る。 FIGS. 3 and 4 show a second embodiment, in which 12 is a treatment instrument. An insulator 13 is provided at the distal end of the treatment tool 12. A piezoelectric element 16 having electrode plates 14 and 15 at both ends is housed inside the distal end side of the treatment instrument 12, and one electrode plate 1
4 is embedded and fixed in the insulator 13. Further, electrodes 17, 17 are connected to the electrode plates 14, 15 of the piezoelectric element 16, respectively.
17 protrude from the front end surface of the insulating portion 13 and are arranged in parallel. Further, an insulating plate 18 is provided on the other electrode plate 15, and this insulating plate 18 faces an impact applying mechanism 19, which will be described later. To explain this impact applying mechanism 19, inside the treatment instrument 12, there are a pair of fixing parts 20 spaced apart in the longitudinal direction,
21 are provided. A through hole 22 is bored in the center of one of the fixed portions 20, and a shaft 24 provided on a movable member 23 is supported in the through hole 22 so as to be slidable in the axial direction. moreover,
An impact member 25 is provided at the other end of the shaft 24 and faces the insulating plate 18 of the piezoelectric element 16 . A coil spring 26 is housed within the treatment tool 12 between the fixed parts 20 and 21, and one end of the coil spring 26 is pressed against the fixed part 21 and the other end is pressed against the movable member 23. Therefore, the movable member 2
3 is always urged toward the piezoelectric element 16 by the restoring force of the coil spring 26. Also, 27
is an operating wire having an operating section 28, which is inserted from the distal end of the treatment instrument 12 through the fixed section 21 and the coil spring 26 and is fixed to the movable member 23.
このように構成された結石破壊装置の使用に際
しては、まず、処置具１をたとえば内視鏡の鉗子
チヤンネルを案内として体腔内に挿入し、体内壁
１０内部の結石１１に電極１７，１７を対向させ
る。この状態で、操作部２８に手指を掛け、コイ
ルスプリング２６の復元力に抗して操作ワイヤ２
７を引つ張ると、コイルスプリング２６は圧縮さ
れる。コイルスプリング２６が充分に圧縮される
と、衝撃部材２５は圧電素子１６の絶縁板１８か
ら離間し、この状態で操作部２８から手指を離す
と、コイルスプリング２６は弾性復元力によつて
可動部材２３は急激に圧電素子１６方向へ移動す
る。したがつて、シヤフト２４を介して衝撃部材
２５は圧電素子１６の絶縁板１８に衝突する。圧
電素子１６が機械的振動を受けると、その力Ｆに
よつて電極板１４，１５に起電力V2が生じ、こ
の起電力V2は電極１７，１７に伝えられ、ここ
で放電する。この放電エネルギは体内壁１０内部
の液体に衝撃波を生じさせ、結石１１を破壊させ
ることになる。 When using the calculus destruction device configured in this way, first, the treatment instrument 1 is inserted into the body cavity using, for example, the forceps channel of an endoscope as a guide, and the electrodes 17 are opposed to the calculus 11 inside the body wall 10. let In this state, put your finger on the operating part 28 and push the operating wire 2 against the restoring force of the coil spring 26.
7, the coil spring 26 is compressed. When the coil spring 26 is sufficiently compressed, the impact member 25 separates from the insulating plate 18 of the piezoelectric element 16, and when you release your finger from the operating section 28 in this state, the coil spring 26 becomes a movable member due to its elastic restoring force. 23 suddenly moves in the direction of the piezoelectric element 16. Therefore, the impact member 25 collides with the insulating plate 18 of the piezoelectric element 16 via the shaft 24 . When the piezoelectric element 16 is subjected to mechanical vibration, the force F generates an electromotive force V 2 on the electrode plates 14 and 15, and this electromotive force V 2 is transmitted to the electrodes 17 and 17, where it is discharged. This discharge energy generates a shock wave in the liquid inside the body wall 10, causing the stone 11 to break.
このように衝撃により圧電素子１６を機械的振
動を与えることによつて起電力を発生することが
でき、処置具１２の先端部以外はまつたく電圧が
印加されないため安全性を向上することができ
る。 In this way, an electromotive force can be generated by mechanically vibrating the piezoelectric element 16 due to an impact, and safety can be improved because no voltage is applied to any part other than the tip of the treatment tool 12. .
この発明は以上説明したように、処置具の先端
部に圧電素子を設け、この圧電素子に低電圧もし
くは衝撃により機械的振動を与えて電極間で放電
するようにしたから、放電エネルギによる衝撃波
で結石を破壊することができる。しかも、処置具
の先端部以外は高電圧が流れないようにしたか
ら、漏電などの虞れもなく安全で、信頼性を向上
することができる。 As explained above, in this invention, a piezoelectric element is provided at the tip of the treatment instrument, and mechanical vibration is applied to the piezoelectric element by low voltage or impact to cause discharge between the electrodes. Can destroy stones. Moreover, since the high voltage is prevented from flowing in any part other than the tip of the treatment instrument, there is no risk of electrical leakage, and it is safe and reliability can be improved.
第１図および第２図はこの発明の第１の実施例
を示すもので、第１図に圧電素子の斜視図、第２
図は使用状態の断面図、第３図および第４図はこ
の発明の第２の実施例を示すもので、第３図は圧
電素子の正面図、第４図は使用状態の断面図であ
る。
１，１２……処置具、３，１６……圧電素子、
９，１７……電極。
1 and 2 show a first embodiment of the present invention, in which FIG. 1 is a perspective view of a piezoelectric element, and FIG.
The figure is a sectional view of the piezoelectric element in use, FIGS. 3 and 4 show a second embodiment of the invention, FIG. 3 is a front view of the piezoelectric element, and FIG. 4 is a sectional view of the piezoelectric element in use. . 1, 12... Treatment tool, 3, 16... Piezoelectric element,
9,17...electrode.
Claims (1)
破壊する結石破壊装置において、処理具の先端部
に圧電素子を設け、この圧電素子に機械的振動を
与える手段および上記圧電素子が発生する電圧を
放電する電極を設けたことを特徴とする結石破壊
装置。 ２ 圧電素子は低電圧により機械的振動をうける
ことを特徴とする特許請求の範囲第１項記載の結
石破壊装置。 ３ 圧電素子は衝撃により機械的振動をうけるこ
とを特徴とする特許請求の範囲第１項記載の結石
破壊装置。[Scope of Claims] 1. A stone destruction device that destroys stones in a body cavity using a shock wave caused by discharge energy, which includes a piezoelectric element provided at the tip of a treatment tool, means for applying mechanical vibration to the piezoelectric element, and a means for applying mechanical vibration to the piezoelectric element. A stone destruction device characterized by being provided with an electrode that discharges the generated voltage. 2. The calculus destruction device according to claim 1, wherein the piezoelectric element is subjected to mechanical vibration by low voltage. 3. The calculus breaking device according to claim 1, wherein the piezoelectric element is subjected to mechanical vibration due to impact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9782680A JPS5722748A (en) | 1980-07-17 | 1980-07-17 | Breaking device for calculus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9782680A JPS5722748A (en) | 1980-07-17 | 1980-07-17 | Breaking device for calculus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5722748A JPS5722748A (en) | 1982-02-05 |
| JPS6160699B2 true JPS6160699B2 (en) | 1986-12-22 |
Family
ID=14202524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9782680A Granted JPS5722748A (en) | 1980-07-17 | 1980-07-17 | Breaking device for calculus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5722748A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63199141A (en) * | 1987-02-12 | 1988-08-17 | Honda Motor Co Ltd | Projecting device of storing body for vehicle |
-
1980
- 1980-07-17 JP JP9782680A patent/JPS5722748A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63199141A (en) * | 1987-02-12 | 1988-08-17 | Honda Motor Co Ltd | Projecting device of storing body for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5722748A (en) | 1982-02-05 |
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