【０００１】[0001]
【発明の属する技術分野】本発明は、超音波振動によっ
て生体内の患部組織を切除する等の処置を行う超音波治
療装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic therapy apparatus for performing a procedure such as cutting off a diseased tissue in a living body by ultrasonic vibration.
【０００２】[0002]
【従来の技術】従来より、超音波治療装置を用いて前立
腺の切除や結石の破砕あるいは肝臓切除等が行われてい
る。かかる超音波治療装置は、超音波振動子、ホーン、
振動伝達部材を連結して構成されており、超音波振動子
から発生される超音波振動をホーンで機械的に増幅して
振動伝達部材に伝達し、この振動伝達部材の先端部近傍
に生体の患部組織を接触させて処置を行っている。この
ような超音波治療装置には、超音波振動によって組織を
乳化、吸引して患部を破砕除去する例えばパイプ状のプ
ローブを有する超音波吸引装置や、超音波振動によって
発生する熱を利用して凝固切開を行う例えばハサミ状の
プローブを有する超音波凝固切開装置等がある。超音波
吸引装置の使用中においては、振動伝達部材は対象物等
と接触した際に横方向の外力を受けることがあり、この
場合、プローブ即ち振動伝達部材はその外周側に間隔を
持って配設された同心のシースに接触してその接触部分
が磨耗してしまうこととなる。あるいは、超音波凝固切
開装置においては、それぞれがハサミの刃の片側ずつの
如き構成となる振動伝達部材と超音波振動を行わない把
持部材との間に生ずる摩擦により磨耗が発生してしま
う。2. Description of the Related Art Conventionally, resection of a prostate, crushing of a calculus, or liver resection has been performed by using an ultrasonic therapy apparatus. Such an ultrasonic therapy device includes an ultrasonic transducer, a horn,
A vibration transmitting member is connected, and the ultrasonic vibration generated from the ultrasonic vibrator is mechanically amplified by a horn and transmitted to the vibration transmitting member. Treatment is performed by bringing the affected tissue into contact. Such an ultrasonic therapy device uses an ultrasonic suction device having a pipe-shaped probe for emulsifying and sucking a tissue by ultrasonic vibration to crush and remove an affected part, or utilizing heat generated by the ultrasonic vibration. For example, there is an ultrasonic coagulation and incision apparatus having a scissor-shaped probe for performing coagulation and incision. During use of the ultrasonic suction device, the vibration transmitting member may receive an external force in the lateral direction when it comes into contact with an object or the like. It comes into contact with the provided concentric sheath, and the contact portion is worn. Alternatively, in the ultrasonic coagulation and incision apparatus, abrasion occurs due to friction generated between a vibration transmitting member having a configuration like one side of a scissor blade and a gripping member that does not perform ultrasonic vibration.
【０００３】[0003]
【発明が解決しようとする課題】この磨耗を防止する方
法として、特開平５−９５９５５号公報に、振動伝達部
材の表面に表面硬化処理を行う技術が開示されている。
即ち、振動伝達部材には、通常、チタン合金が用いられ
ており、その表面にコーティングを施す場合には、イオ
ンプレーティング等の物理蒸着（ＰＶＤ法）やＣＶＤ等
の化学蒸着が行われる。しかしながら、ＣＶＤは、高温
下の環境中でコーティングを行うため、母材との密着性
は良好であるものの、母材の相状態に影響を及ぼすた
め、母材であるチタン合金の物性が変化してしまい、超
音波伝達性能に影響を及ぼすことがわかっている。従っ
て、実際に使用されているコーティングは、ＰＶＤ法で
ある。しかしながら、ＰＶＤ法によるコーティングで
は、コスト等を考慮すれば、実用上、膜厚が３μｍ程度
のコーティング層としかすることができないため、例え
ば上述のように振動伝達部材とシースが長時間接触した
ような場合には、振動伝達部材にコーティングを施して
いてもそのコーティング部分が容易に磨耗してしまい、
母材が露出してしまう。その結果、振動伝達部材は、加
えられる超音波振動による内部応力、曲げ応力により磨
耗した部分に応力が集中し、その状態のままさらに超音
波振動を印加し続けることでやがて疲労破壊の耐久限度
に達して磨耗部分から初期亀裂が発生し、疲労破壊に至
る。さらには、３μｍという非常に薄いコーティング部
分のビッカース硬度は約１２００である一方、母材であ
るチタン合金のビッカース硬度は約６００であり、この
硬度差によって、例えば、強い衝撃が振動伝達部材のコ
ーティング表面に加わった場合、コーティング部分は無
傷であっても、母材に衝撃が加わり母材から亀裂が発生
することがある。この場合には、コーティング層と母材
との間の傷となるので超音波振動伝達時に応力が集中し
やすくなり、破壊につながる初期亀裂発生の要因とな
る。本発明は、上記事情に鑑みてなされたもので、耐磨
耗性にすぐれ、かつ十分な強度を有する振動伝達部材を
有する超音波治療装置を実現することを目的としてい
る。As a method for preventing this abrasion, Japanese Patent Application Laid-Open No. 5-95955 discloses a technique for performing a surface hardening treatment on the surface of a vibration transmitting member.
That is, a titanium alloy is usually used for the vibration transmitting member, and when coating the surface thereof, physical vapor deposition (PVD method) such as ion plating or chemical vapor deposition such as CVD is performed. However, CVD performs coating in a high-temperature environment, and therefore has good adhesion to the base material, but affects the phase state of the base material, and thus changes the physical properties of the titanium alloy as the base material. Has been found to affect the ultrasonic transmission performance. Therefore, the coating actually used is the PVD method. However, in consideration of cost and the like, in the coating by the PVD method, in practice, it is only possible to form a coating layer having a film thickness of about 3 μm. In some cases, even if a coating is applied to the vibration transmitting member, the coated part is easily worn,
The base material is exposed. As a result, in the vibration transmitting member, the stress is concentrated on the part worn by the internal stress and bending stress due to the applied ultrasonic vibration, and by continuing to apply the ultrasonic vibration in that state, the durability limit of the fatigue fracture is eventually reached. And an initial crack is generated from the worn portion, leading to fatigue failure. Further, the Vickers hardness of the very thin coating portion of 3 μm is about 1200, while the Vickers hardness of the titanium alloy as the base material is about 600. When applied to the surface, even if the coating portion is intact, a shock may be applied to the base material and a crack may be generated from the base material. In this case, a crack is generated between the coating layer and the base material, so that stress tends to be concentrated during transmission of ultrasonic vibration, which causes an initial crack to be broken. The present invention has been made in view of the above circumstances, and has as its object to realize an ultrasonic treatment apparatus having a vibration transmitting member having excellent wear resistance and sufficient strength.
【０００４】[0004]
【課題を解決するための手段】本発明の超音波治療装置
は、超音波振動子で発生される超音波振動を伝達すると
共に対象部位に接触して超音波振動を印加するための振
動伝達部材を備えた超音波治療装置において、前記振動
伝達部材の少なくとも一部に複数層の表面加工処理層を
積層して形成したことを特徴とするものである。SUMMARY OF THE INVENTION An ultrasonic therapy apparatus according to the present invention is a vibration transmitting member for transmitting ultrasonic vibration generated by an ultrasonic vibrator and applying ultrasonic vibration in contact with a target portion. , Wherein a plurality of surface processing layers are laminated on at least a part of the vibration transmission member.
【０００５】[0005]
【発明の実施の形態】以下、図面を参照して本発明の実
施の形態を説明する。図１乃至図４は本発明の第１の実
施の形態に係り、図１は本発明の超音波治療装置のハン
ドピースの斜視図、図２はハンドピース先端部分の拡大
図、図３は振動伝達部材の断面図、図４はコーティング
による応力分布の説明図である。Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 relate to a first embodiment of the present invention, FIG. 1 is a perspective view of a handpiece of the ultrasonic therapy apparatus of the present invention, FIG. 2 is an enlarged view of a tip portion of the handpiece, and FIG. FIG. 4 is a cross-sectional view of the transmission member, and FIG. 4 is an explanatory diagram of stress distribution due to coating.
【０００６】図１のハンドピース１は、超音波振動によ
って発生する熱を利用して凝固切開を行うハサミ状のプ
ローブを有する超音波凝固切開装置に用いられるもので
ある。ハンドピース１は、内部に超音波振動子を配設す
る把持部２と、この把持部２に連設されその内部に超音
波振動伝達部材を配設するシース３とを有しており、把
持部２の後端からは超音波振動子に電力を供給するため
の図示しない電源装置に接続されるケーブル４が延出し
ている。超音波振動子と振動伝達部材との間には超音波
振動子で発生された超音波振動を機械的に増幅して振動
伝達部材に伝達するホーンが設けられている。シース３
の先端は開口しており、その内部からジョー５および振
動伝達部材６がシース３の先端面から突出して設けられ
ている。ジョー５は図２に示す回転軸７を中心として回
動自在であり、回動することによって振動伝達部材６と
の間に患部を挟むことができる。ジョー５は機械的にハ
ンドル８に連結されており、ジョー５の回動動作即ちジ
ョー５と振動伝達部材６とで構成されるハサミ状の構成
の開閉操作は、把持部２に設けられたハンドル８を図中
の矢印方向に動作させることによって行うことができ
る。ジョー５は、テフロン等の従順部材もしくは金属で
構成される。The handpiece 1 shown in FIG. 1 is used in an ultrasonic coagulation and incision apparatus having a scissor-shaped probe for performing coagulation and incision using heat generated by ultrasonic vibration. The handpiece 1 has a grip portion 2 in which an ultrasonic vibrator is disposed, and a sheath 3 connected to the grip portion 2 and in which an ultrasonic vibration transmitting member is disposed. A cable 4 connected to a power supply (not shown) for supplying power to the ultrasonic vibrator extends from the rear end of the unit 2. A horn for mechanically amplifying the ultrasonic vibration generated by the ultrasonic vibrator and transmitting the ultrasonic vibration to the vibration transmitting member is provided between the ultrasonic vibrator and the vibration transmitting member. Sheath 3
The jaw 5 and the vibration transmitting member 6 protrude from the distal end surface of the sheath 3 from the inside thereof. The jaw 5 is rotatable about a rotation shaft 7 shown in FIG. 2. By rotating, the jaw 5 can sandwich the affected part between the jaw 5 and the vibration transmitting member 6. The jaw 5 is mechanically connected to the handle 8, and the turning operation of the jaw 5, that is, the opening / closing operation of the scissors-like configuration composed of the jaw 5 and the vibration transmitting member 6, is performed by the handle provided on the grip portion 2. 8 in the direction of the arrow in the figure. The jaw 5 is made of a compliant member such as Teflon or a metal.
【０００７】図３は、振動伝達部材６の断面図であり、
振動伝達部材６の周囲にはその中心側から順にそれぞれ
が３μｍの厚さを有する３層のコーティング１１、１
２、１３が設けられている。コーティングを施す部分は
振動伝達部材６の長手方向において少なくとも振動伝達
部材６が他の部材と摺動して磨耗が発生する可能性があ
る部位を含み、また、シース３から突出して露出する部
分をも含む。超音波振動の節部を含む構成としても良
く、振動伝達部材６の全長にわたってコーティングを施
しても良い。振動伝達部材６がジョー５と接触して発生
する磨耗は、通常、５〜６μｍ程度となることが最も多
く、一方、コーティングの厚さは単層では約３μｍであ
るので、振動伝達部材６にコーティングを１層のみしか
施さない場合には、磨耗により母材が容易に露出してし
まうこととなる。振動伝達部材としては、６μｍ以上の
コーティング厚が必要であり、最も好ましいコーティン
グ層の構成は、実験の結果から、コーティング層が３層
以上であってかつ合計のコーティング膜の厚さが８μｍ
以上である。FIG. 3 is a sectional view of the vibration transmitting member 6.
The three layers of coatings 11, 1 each having a thickness of 3 μm are arranged around the vibration transmitting member 6 in order from the center side thereof.
2 and 13 are provided. The portion to be coated includes at least a portion in the longitudinal direction of the vibration transmission member 6 where the vibration transmission member 6 may slide with other members to cause abrasion, and a portion protruding from the sheath 3 and exposed. Including. A configuration including a node of ultrasonic vibration may be adopted, and coating may be applied over the entire length of the vibration transmitting member 6. The wear generated when the vibration transmitting member 6 comes into contact with the jaw 5 is usually most often about 5 to 6 μm, while the thickness of the coating is about 3 μm in a single layer. When only one layer is applied, the base material is easily exposed due to abrasion. As the vibration transmitting member, a coating thickness of 6 μm or more is necessary. The most preferable configuration of the coating layer is based on the result of the experiment that the number of coating layers is 3 or more and the total coating film thickness is 8 μm.
That is all.
【０００８】図４は、図３に示す振動伝達部材６の各部
位Ｏ〜Ｄにおける応力分布をあらわすグラフである。Ａ
は母材とコーティング層１１との境界面、Ｂはコーティ
ング層１１とコーティング層１２との境界面、Ｃはコー
ティング層１２とコーティング層１３との境界面を示し
ている。コスト等の実用上の要件を全く無視すれば、Ｐ
ＶＤ法によって単層で６μｍ以上のコーティング層を蒸
着させることは不可能ではないものの、例えば、結果と
して同じコーティング厚さの２種類のプローブ、即ち例
えば９μｍの単層からなるコーティングと本願発明の如
き複数即ちそれぞれが３μｍの３つの層からなる合計９
μｍの厚さのコーティングとを比較した場合には、実験
を行った結果、超音波振動を印加した場合に、単層から
なるコーティングを施したプローブの方が、複数の層か
らなるコーティングを施したプローブに比較して容易に
母材からコーティングが剥がれ落ちてしまうことが確認
されている。応力分布についてみれば、単層からなるコ
ーティングを施したものに比較して、図４からも明らか
なように、複数のコーティングを重ねたものの方が応力
勾配の差を小さくできるため、各層間に発生する応力に
よって生ずる亀裂の発生を抑制することができる。ま
た、コーティング層は１０μｍ以上の厚さとすると、コ
ーティング層自身と母材との応力勾配によって割れ易く
なることが実験によって確認されている。FIG. 4 is a graph showing a stress distribution in each of the portions O to D of the vibration transmitting member 6 shown in FIG. A
Denotes a boundary surface between the base material and the coating layer 11, B denotes a boundary surface between the coating layers 11 and 12, and C denotes a boundary surface between the coating layers 12 and 13. If the practical requirements such as cost are completely ignored, P
Although it is not impossible to deposit a coating layer of 6 μm or more in a single layer by the VD method, for example, as a result, two kinds of probes having the same coating thickness, that is, a coating consisting of a single layer of, for example, 9 μm and a coating as in the present invention are used. Plural, ie 3 layers each of 3 μm, total 9
In comparison with a coating with a thickness of μm, experiments showed that when ultrasonic vibration was applied, a probe with a single layer coating applied a coating with multiple layers. It has been confirmed that the coating is easily peeled off from the base material as compared with the probe which has been manufactured. Regarding the stress distribution, as apparent from FIG. 4, the difference in the stress gradient can be reduced in the case where a plurality of coatings are stacked as compared with the case where the coating having a single layer is applied. The generation of cracks caused by the generated stress can be suppressed. Further, it has been confirmed by experiments that if the coating layer has a thickness of 10 μm or more, the coating layer is liable to crack due to a stress gradient between the coating layer itself and the base material.
【０００９】次に、この実施の形態の作用を説明する。
ハンドピース１の振動伝達部材６を、処置を行う患者の
所望の部位に当接させた後、ハンドル８を操作して、超
音波振動を印加すべき組織をジョー５との間に挟み込
む。図示しないスイッチ手段からの入力に対応して、超
音波振動子が振動を開始し、超音波振動は振動伝達部材
６に伝達される。超音波振動により生ずる摩擦熱の作用
によって患者の組織に凝固切開等の所望の処置が行われ
る。振動伝達部材６には、十分な耐磨耗性と強度を有す
るコーティングが施されていることから、磨耗に起因す
る応力集中によって亀裂が発生する可能性は飛躍的に低
減されており、手術中にプローブが破損する可能性を著
しく低減出来て、手術の効率、安全性を向上出来る。Next, the operation of this embodiment will be described.
After the vibration transmitting member 6 of the handpiece 1 is brought into contact with a desired part of the patient to be treated, the handle 8 is operated to sandwich the tissue to be applied with ultrasonic vibration between the jaw 5 and the tissue. The ultrasonic vibrator starts to vibrate in response to an input from a switch (not shown), and the ultrasonic vibration is transmitted to the vibration transmitting member 6. A desired treatment such as a coagulation incision is performed on the patient's tissue by the action of frictional heat generated by the ultrasonic vibration. Since the vibration transmitting member 6 is provided with a coating having sufficient wear resistance and strength, the possibility of cracks due to stress concentration due to wear is dramatically reduced. Thus, the possibility of damage to the probe can be significantly reduced, and the efficiency and safety of the operation can be improved.
【００１０】本実施の形態によれば、加工上でのコスト
等の実用性の要件をクリアしながら、振動伝達部材に十
分な耐磨耗性と強度を付与することが出来て、効率的で
安全性の高い手術を行う超音波治療装置を実現すること
ができる。衝撃等の強い外力に対しても母材に亀裂が発
生することも防止できる。また、ハンドピース自体の耐
久性を高くすることができることから、装置自体の長寿
命化をも達成できて、コスト面でも有利である。According to this embodiment, it is possible to impart sufficient wear resistance and strength to the vibration transmitting member while satisfying practical requirements such as cost in processing, and the efficiency is improved. It is possible to realize an ultrasonic therapy apparatus that performs a highly safe operation. It is possible to prevent the base material from being cracked even by a strong external force such as an impact. In addition, since the durability of the handpiece itself can be increased, the life of the device itself can be extended, which is advantageous in terms of cost.
【００１１】なお、第１の実施の形態では、３μｍのコ
ーティングを３層重ねる構成としたが、重ねるそれぞれ
のコーティングの厚さは３μｍに限定されるものではな
く、コスト等の実用性をクリアした厚さであれば良い。
重ねる層の数も３層に限定されるものではなく４層以上
であっても良いし、２層であっても一定の効果を奏する
のはもちろんである。なお、本願は、単層のみで形成し
たコーティング層に比べて、同じコーティング厚さを複
数のコーティング層を重ねることにより形成した構成で
は、母材からのはがれ易さが飛躍的に向上するものであ
るが、コーティング層の数は多ければ多いほどコスト的
に負担となることから、必要最小限の適正な数のコーテ
ィング層とするのは当然のことである。In the first embodiment, three layers of 3 .mu.m coating are laminated, but the thickness of each layer is not limited to 3 .mu.m and clears practicality such as cost. Any thickness is acceptable.
The number of layers to be overlapped is not limited to three, and may be four or more. Needless to say, even with two layers, a certain effect is obtained. Note that, in the present application, in comparison with a coating layer formed of only a single layer, in the configuration formed by stacking a plurality of coating layers with the same coating thickness, the ease of peeling from the base material is dramatically improved. However, since the greater the number of coating layers, the more the cost is burdened, it is natural that the necessary minimum number of appropriate coating layers is used.
【００１２】次に、本発明の第２の実施の形態を図５を
参照して説明する。第２の実施の形態は、第１の実施の
形態と振動伝達部材の構成のみが相違するものである。Next, a second embodiment of the present invention will be described with reference to FIG. The second embodiment is different from the first embodiment only in the configuration of the vibration transmitting member.
【００１３】図５の振動伝達部材１６は、その先端面１
６ｄに続く外表面に第１の実施の形態と同様のコーティ
ングを施したものであり、コーティングを施す領域に特
徴を有するものである。即ち、母材に対して、まず第１
層となるコーティングを振動伝達部材１６の１６ａ、１
６ｂ、１６ｃの領域にわたって施す。続いて、その上に
重ねて領域１６ｂ、１６ｃにのみ第２層となるコーティ
ングを施す。さらに続いて、その上に重ねて領域１６ｃ
にのみ第３層となるコーティングを施したものである。
従って、領域１６ａは第１層のみがコーティングされた
部分、領域１６ｂは第１層および第２層が重ねてコーテ
ィングされた部分、領域１６ｃは第１層、第２層および
第３層の３つのコーティングが重ねて施された部分とな
る。即ち、上に重ねるコーティングの領域を順次狭くし
て行ったものである。この実施の形態の作用は第１の実
施の形態と同じである。The vibration transmitting member 16 shown in FIG.
The outer surface following 6d is coated with the same coating as in the first embodiment, and has a characteristic in the area to be coated. That is, first, the first
The coating to be a layer is applied to the vibration transmitting members 16a, 16a,
6b and 16c. Subsequently, a coating serving as a second layer is applied only to the regions 16b and 16c so as to overlap therewith. Subsequently, the region 16c is superimposed thereon.
Only the third layer is coated.
Therefore, the region 16a is a portion where only the first layer is coated, the region 16b is a portion where the first and second layers are coated on top of each other, and the region 16c is a portion where the first layer, the second layer and the third layer are coated. This is where the coating is applied. In other words, the coating area to be overlaid was narrowed sequentially. The operation of this embodiment is the same as that of the first embodiment.
【００１４】コーティングの領域を順次狭くしていった
ことにより、その境界となる部分がラインで示されるこ
とになる。これは、コーティング作業を行う際に、コー
ティングを施さない部分にはマスキングを行うために必
ずラインとなる部分が形成されることによるものであ
る。従って、各コーティング層の存在が目視によって容
易に確認出来、コーティング作業のモレの発見が容易に
行える他、すべてのコーティング作業が終了した後から
でも各コーティング層の厚さを容易に測定することがで
きる。必要な部分にのみ必要な厚さのコーティングを施
すようにすることもできる。As the area of the coating is gradually reduced, the boundary portion is indicated by a line. This is because, when performing the coating operation, a portion which is always a line is formed in a portion where no coating is applied in order to perform masking. Therefore, the presence of each coating layer can be easily confirmed visually, and the leakage of the coating operation can be easily found.In addition, the thickness of each coating layer can be easily measured even after all the coating operations are completed. it can. It is also possible to apply a coating of a required thickness only to a required portion.
【００１５】次に、本発明の第３の実施の形態を図６を
参照して説明する。第３の実施の形態は、第１の実施の
形態と振動伝達部材の構成のみが相違するものである。Next, a third embodiment of the present invention will be described with reference to FIG. The third embodiment is different from the first embodiment only in the configuration of the vibration transmitting member.
【００１６】図６は、振動伝達部材１７の断面図であ
り、振動伝達部材１７の周囲にはＰＶＤ法によるコーテ
ィング層１９が設けられている。また、母材とコーティ
ング層１９との間には例えばニッケルメッキ層からなる
中間層が設けられている。中間層のビッカース硬度は、
この場合、約８００から１０００程度が好ましい。この
実施の形態の作用は第１の実施の形態と同じである。FIG. 6 is a cross-sectional view of the vibration transmitting member 17. A coating layer 19 is provided around the vibration transmitting member 17 by a PVD method. An intermediate layer made of, for example, a nickel plating layer is provided between the base material and the coating layer 19. The Vickers hardness of the middle layer is
In this case, about 800 to 1000 is preferable. The operation of this embodiment is the same as that of the first embodiment.
【００１７】この実施の形態によれば、第１の実施の形
態の応力分布よりもさらに緩やかな応力勾配とすること
ができるため、各層の間から応力集中による亀裂が発生
することを、さらに効率的に抑制することが可能とな
り、耐久性の向上をはかることができる。According to this embodiment, since the stress gradient can be made gentler than the stress distribution of the first embodiment, the generation of cracks due to stress concentration between the layers can be further reduced. And the durability can be improved.
【００１８】次に、本発明の第４の実施の形態を図７を
参照して説明する。図７は本発明の超音波治療装置を示
す断面図である。Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 7 is a sectional view showing an ultrasonic therapy apparatus according to the present invention.
【００１９】図７のハンドピース２１は、超音波振動に
よって組織を乳化、吸引して患部を破砕除去するパイプ
状のプローブを有する超音波吸引装置に用いられるもの
である。ハンドピース２１は、内部に超音波振動子２２
を配設する把持部２３と、この把持部２３に連設されそ
の内部に超音波振動伝達部材２４を配設するシース２５
とを有しており、把持部２３の後端からは超音波振動子
２２に電力を供給するための図示しない電源装置に接続
されるケーブル２６および高周波電流を印加するための
ケーブル２７が延出している。超音波振動子２２と振動
伝達部材２４との間には超音波振動子２２で発生された
超音波振動を機械的に増幅して振動伝達部材２４に伝達
するホーン２８が設けられている。シース２５の先端は
開口しており、その内部からパイプ状の振動伝達部材２
４がシース２５の先端面から突出して設けられている。
振動伝達部材２４は高周波電流をも通電可能である。振
動伝達部材２４の中空部は、ホーン２８および超音波振
動子２２に設けられた中空の吸引管路に連通しており、
図示しない吸引源に接続された吸引チューブ２９に連通
している。振動伝達部材２４の周囲には、図３に示した
のと同様のコーティングが施されている。The handpiece 21 shown in FIG. 7 is used in an ultrasonic suction device having a pipe-shaped probe for emulsifying and sucking tissue by ultrasonic vibration to crush and remove an affected part. The handpiece 21 has an ultrasonic vibrator 22 inside.
And a sheath 25 connected to the grip 23 and having the ultrasonic vibration transmitting member 24 disposed therein.
A cable 26 connected to a power supply (not shown) for supplying power to the ultrasonic vibrator 22 and a cable 27 for applying a high-frequency current extend from the rear end of the gripping portion 23. ing. A horn 28 is provided between the ultrasonic vibrator 22 and the vibration transmitting member 24 for mechanically amplifying the ultrasonic vibration generated by the ultrasonic vibrator 22 and transmitting the amplified ultrasonic vibration to the vibration transmitting member 24. The distal end of the sheath 25 is open, and a pipe-shaped vibration transmitting member 2
4 is provided so as to protrude from the distal end surface of the sheath 25.
The vibration transmitting member 24 is also capable of conducting a high-frequency current. The hollow portion of the vibration transmitting member 24 communicates with a hollow suction line provided in the horn 28 and the ultrasonic vibrator 22,
The suction tube 29 communicates with a suction source (not shown). A coating similar to that shown in FIG. 3 is applied around the vibration transmitting member 24.
【００２０】次に、この実施の形態の作用を説明する。
ハンドピース２１の振動伝達部材２４を、処置を行う患
者の所望の部位に当接させた後、図示しないスイッチ手
段からの入力に対応して、超音波振動子が振動を開始
し、超音波振動は振動伝達部材２４に伝達される。超音
波振動によって患者の組織を乳化、吸引し、患部を破砕
除去する。また、出血時には、高周波電流を印加して患
部を高周波焼灼することもできる。振動伝達部材２４に
は、十分な耐磨耗性と強度を有するコーティングが施さ
れていることから、磨耗に起因する応力集中によって亀
裂が発生する可能性は飛躍的に低減されており、手術中
にプローブが破損する可能性を著しく低減出来て、手術
の効率、安全性を向上出来る。Next, the operation of this embodiment will be described.
After the vibration transmitting member 24 of the handpiece 21 is brought into contact with a desired part of the patient to be treated, the ultrasonic vibrator starts vibrating in response to an input from a switch (not shown), Is transmitted to the vibration transmitting member 24. The tissue of the patient is emulsified and aspirated by ultrasonic vibration, and the affected area is crushed and removed. In addition, at the time of bleeding, the affected part can be subjected to high-frequency ablation by applying a high-frequency current. Since the vibration transmitting member 24 is provided with a coating having sufficient wear resistance and strength, the possibility of cracking due to stress concentration due to wear is dramatically reduced. Thus, the possibility of damage to the probe can be significantly reduced, and the efficiency and safety of the operation can be improved.
【００２１】本実施の形態によれば、加工上でのコスト
等の実用性の要件をクリアしながら、振動伝達部材に十
分な耐磨耗性と強度を付与することが出来て、効率的で
安全性の高い手術を行う超音波治療装置を実現すること
ができる。振動伝達部材２４に対して治療処置の最中
に、横方向の外力が加わって、振動伝達部材２４とシー
ス２５が接触しても、十分な耐久性を有していることか
ら、母材に亀裂が発生することも防止できる。また、ハ
ンドピース自体の耐久性を高くすることができることか
ら、装置自体の長寿命化をも達成できて、コスト面でも
有利である。According to this embodiment, it is possible to impart sufficient abrasion resistance and strength to the vibration transmitting member while satisfying practical requirements such as processing cost and the like. It is possible to realize an ultrasonic therapy apparatus that performs a highly safe operation. Even when a lateral external force is applied to the vibration transmitting member 24 during a treatment procedure, and the vibration transmitting member 24 and the sheath 25 come into contact with each other, the vibration transmitting member 24 has sufficient durability. The occurrence of cracks can also be prevented. In addition, since the durability of the handpiece itself can be increased, the life of the device itself can be extended, which is advantageous in terms of cost.
【００２２】以上詳述したように本発明の実施態様によ
れば、以下のような構成を得ることができる。 ［付記項１］超音波振動子で発生される超音波振動を伝
達すると共に対象部位に接触して超音波振動を印加する
ための振動伝達部材を備えた超音波治療装置において、
前記振動伝達部材の少なくとも一部に複数層の表面加工
処理層を積層して形成したことを特徴とする超音波治療
装置。 ［付記項２］前記振動伝達部材はチタン合金からなり、
前記表面加工処理層はＰＶＤであることを特徴とする付
記項１に記載の超音波治療装置。 ［付記項３］前記表面加工処理層は３層積層されたもの
であり、３層積層された合計の表面加工処理層の厚さは
約８μｍであることを特徴とする付記項１に記載の超音
波治療装置。 ［付記項４］前記表面加工処理層は振動伝達部材が超音
波治療装置の他の部材と接触する可能性のある部位に形
成されることを特徴とする付記項１に記載の超音波治療
装置。 ［付記項５］前記表面加工処理層の面積は下層に比べ上
層側が狭いことを特徴とする付記項１に記載の超音波治
療装置。 ［付記項６］前記表面加工処理層の面積は下層に比べ上
層側が順次狭く形成されることを特徴とする付記項５に
記載の超音波治療装置。 ［付記項７］前記表面加工処理層の少なくとも表面とな
る最上層を除く中間層をメッキ層で形成したことを特徴
とする付記項１に記載の超音波治療装置。As described in detail above, according to the embodiment of the present invention, the following configuration can be obtained. [Supplementary item 1] An ultrasonic treatment apparatus including a vibration transmission member for transmitting ultrasonic vibration generated by an ultrasonic transducer and applying ultrasonic vibration by contacting a target portion,
An ultrasonic therapy apparatus, wherein a plurality of surface treatment layers are laminated on at least a part of the vibration transmission member. [Appendix 2] The vibration transmitting member is made of a titanium alloy,
The ultrasonic treatment apparatus according to claim 1, wherein the surface treatment layer is PVD. [Additional Item 3] The additional item 1 according to Additional Item 1, wherein the surface-treated layer is formed by stacking three layers, and the total thickness of the three surface-processed layers is about 8 μm. Ultrasound therapy device. [Appendix 4] The ultrasonic treatment apparatus according to Appendix 1, wherein the surface treatment layer is formed at a portion where the vibration transmitting member may come into contact with another member of the ultrasonic treatment apparatus. . [Additional Item 5] The ultrasonic treatment apparatus according to Additional Item 1, wherein an area of the surface-treated layer is smaller on an upper layer side than on a lower layer. [Additional Item 6] The ultrasonic treatment apparatus according to Additional Item 5, wherein the area of the surface-treated layer is formed so that the upper layer side is sequentially narrower than the lower layer. [Additional Item 7] The ultrasonic treatment apparatus according to Additional Item 1, wherein an intermediate layer excluding at least an uppermost layer which is a surface of the surface processing layer is formed of a plating layer.
【００２３】[0023]
【発明の効果】以上説明したように本発明によれば、加
工上でのコスト等の実用性の要件をクリアしながら、振
動伝達部材に十分な耐磨耗性と強度を付与することが出
来て、効率的で安全性の高い手術を行う超音波治療装置
を実現することができる。As described above, according to the present invention, it is possible to impart sufficient wear resistance and strength to a vibration transmitting member while satisfying practical requirements such as cost in processing. Thus, it is possible to realize an ultrasonic therapy apparatus that performs an efficient and highly safe operation.
【図１】本発明の第１の実施の形態の超音波治療装置の
ハンドピースの斜視図。FIG. 1 is a perspective view of a handpiece of an ultrasonic therapy apparatus according to a first embodiment of the present invention.
【図２】図１のハンドピース先端部分の拡大図。FIG. 2 is an enlarged view of a tip portion of the handpiece of FIG. 1;
【図３】本発明の第１の実施の形態の振動伝達部材の断
面図。FIG. 3 is a sectional view of the vibration transmitting member according to the first embodiment of the present invention.
【図４】本発明の第１の実施の形態のコーティングによ
る応力分布の説明図。FIG. 4 is an explanatory diagram of a stress distribution by the coating according to the first embodiment of the present invention.
【図５】本発明の第２の実施の形態の超音波治療装置の
振動伝達部材の斜視図。FIG. 5 is a perspective view of a vibration transmission member of the ultrasonic therapy apparatus according to the second embodiment of the present invention.
【図６】本発明の第３の実施の形態の超音波治療装置の
振動伝達部材の断面図。FIG. 6 is a cross-sectional view of a vibration transmitting member of the ultrasonic therapy apparatus according to the third embodiment of the present invention.
【図７】本発明の第４の実施の形態の超音波治療装置の
ハンドピースの断面図。FIG. 7 is a sectional view of a handpiece of an ultrasonic therapy apparatus according to a fourth embodiment of the present invention.
１，２１ ハンドピース ３，２５ シース ６，１６，１７，２４ 振動伝達部材 1,21 Handpiece 3,25 Sheath 6,16,17,24 Vibration transmitting member
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9295070AJPH11128238A (en) | 1997-10-28 | 1997-10-28 | Ultrasonic therapy device |
| US09/170,266US6129735A (en) | 1996-06-21 | 1998-10-13 | Ultrasonic treatment appliance |
| US09/563,264US6887252B1 (en) | 1996-06-21 | 2000-05-01 | Ultrasonic treatment appliance |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9295070AJPH11128238A (en) | 1997-10-28 | 1997-10-28 | Ultrasonic therapy device |
| Publication Number | Publication Date |
|---|---|
| JPH11128238Atrue JPH11128238A (en) | 1999-05-18 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9295070APendingJPH11128238A (en) | 1996-06-21 | 1997-10-28 | Ultrasonic therapy device |
| Country | Link |
|---|---|
| JP (1) | JPH11128238A (en) |
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