JPH0824266A - Horn for ultrasonic operation apparatus - Google Patents

Horn for ultrasonic operation apparatus

Info

Publication number
JPH0824266A
JPH0824266A JP6168121A JP16812194A JPH0824266A JP H0824266 A JPH0824266 A JP H0824266A JP 6168121 A JP6168121 A JP 6168121A JP 16812194 A JP16812194 A JP 16812194A JP H0824266 A JPH0824266 A JP H0824266A
Authority
JP
Japan
Prior art keywords
horn
diameter
shape
tip
ultrasonic
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
JP6168121A
Other languages
Japanese (ja)
Inventor
Kazuhiko Yagata
和彦 屋ケ田
Masato Higuma
正人 樋熊
Akira Harada
明 原田
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.)
Sumitomo Bakelite Co Ltd
Original Assignee
Sumitomo Bakelite 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 Sumitomo Bakelite Co Ltd filed Critical Sumitomo Bakelite Co Ltd
Priority to JP6168121A priority Critical patent/JPH0824266A/en
Publication of JPH0824266A publication Critical patent/JPH0824266A/en
Pending legal-status Critical Current

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  • Surgical Instruments (AREA)

Abstract

PURPOSE:To provide a horn for an ultrasonic operation apparatus by which a high amplitude expansion rate and a large working area can simultaneously by obtained. CONSTITUTION:A diameter expanding part 5 expanding in a shape of a horn is arranged at the tip part of a small-diameter part 3 following a large-diameter part 4 of a horn of an ultrasonic operation apparatus in which an organic tissue is crushed and sucked away by ultrasonic vibration. Then, a step curved surface 6 of the diameter-expanded part is formed in a single R shape or a compound R shape and a recessed hollow part is preferably provided on the internal surface of the diameter-expanded part to be made a thin form.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、生体組織を破砕し、吸
引除去するための超音波手術用具のホーンに関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horn of an ultrasonic surgical instrument for crushing living tissue and removing it by suction.

【０００２】[0002]

【従来の技術】超音波の機械的振動を利用して生体組織
を破砕して、さらに乳化し吸引除去する超音波手術用
具、謂る超音波メスは各種外科手術に使用されている。2. Description of the Related Art An ultrasonic surgical tool for crushing living tissue by utilizing mechanical vibration of ultrasonic waves, further emulsifying and removing by suction, so-called ultrasonic scalpel is used in various surgical operations.

【０００３】この超音波手術用具の重要な構成部分であ
り、生体組織と接触して機械的振動により破砕を行うホ
ーンは、図４に示したように、接続部（１２）において
超音波振動源である振動子とネジ等の適宜な方法によっ
て接続され、振動子の超音波振動をホーン先端の作用部
（１３）へ伝達増幅するものである。通常、ホーン（１
１）には長軸方向に貫通孔があいており、貫通穴は先端
の作用部（１３）で破砕された生体組織及び洗浄液、体
液等を吸引し、除去するための吸引孔（１４）として使
用される。As shown in FIG. 4, a horn, which is an important constituent part of this ultrasonic surgical tool and which is crushed by mechanical vibration in contact with a living tissue, has an ultrasonic vibration source at a connecting portion (12). Is connected to the vibrator by an appropriate method such as a screw, and the ultrasonic vibration of the vibrator is transmitted and amplified to the working portion (13) at the tip of the horn. Usually a horn (1
1) has a through-hole in the long axis direction, and the through-hole serves as a suction hole (14) for sucking and removing the living tissue and the washing liquid, body fluid and the like crushed by the action portion (13) at the tip. used.

【０００４】超音波ホーンの形状は、振動子の振動振幅
を拡大させるため、先端部分において小径化した形状に
なっている。一般に小径部と大径部の面積比が大きいほ
ど振幅の拡大率が大きくなり、ホーン先端での高振幅化
が図られ、その組織破砕力は増大される。The shape of the ultrasonic horn is such that the tip portion has a smaller diameter in order to increase the vibration amplitude of the vibrator. Generally, the larger the area ratio between the small diameter portion and the large diameter portion, the larger the amplitude expansion rate, the higher the amplitude at the tip of the horn, and the greater the tissue crushing force.

【０００５】[0005]

【発明が解決しようとする課題】従って、破砕力を高め
るためには、大径部の径を大きくするか、小径部の径を
小さくすることが必要である。ところが、ホーンは手に
持って組織へ接触させるハンドピース内に内蔵されるた
め、操作性の問題から大径部の大きさには限界がある。
このため高破砕力を得るためには、小径部を細くする手
法が採られるが、頭蓋骨内底や軟骨の切削、肝硬変や体
表面の痣の除去手術等では、振幅を落とさずに作用部の
面積を大きくしたホーンが必要とされる。Therefore, in order to increase the crushing force, it is necessary to increase the diameter of the large diameter portion or decrease the diameter of the small diameter portion. However, since the horn is built into the handpiece that is held in the hand and brought into contact with the tissue, the size of the large diameter portion is limited due to operability problems.
For this reason, in order to obtain high crushing power, a method of making the small diameter part thin is adopted, but in cutting the inner base of the skull and cartilage, surgery for removing cirrhosis of the liver and bruise on the body surface, etc., the amplitude of the action part is not reduced. A horn with a large area is required.

【０００６】本発明は、このような医療現場からの要求
に応えるため、高い振幅拡大率と作用面積の広い超音波
手術用具のホーンを提供することを目的としたものであ
る。In order to meet the demands from the medical field, the present invention has an object to provide a horn for an ultrasonic surgical instrument having a high amplitude expansion rate and a wide working area.

【０００７】[0007]

【課題を解決するための手段】上記の目的を達成するた
めの本発明による超音波手術用具のホーンは、超音波振
動により生体組織を破砕し、吸引除去する超音波手術用
具のホーンの大径部分に連続する小径のホーン先端部に
ラッパ状に拡開する膨径部を有することを構造上の特徴
とする。A horn of an ultrasonic surgical instrument according to the present invention for achieving the above object has a large diameter of a horn of an ultrasonic surgical instrument which crushes living tissue by ultrasonic vibration and removes it by suction. A structural feature is that a horn tip portion having a small diameter continuous with the portion has an expanded diameter portion that expands like a trumpet.

【０００８】本発明の超音波ホーンは、ホーン先端部分
が小径で振動子側が大径部分のホーン形状において、前
記ホーン先端部分を可能な限り小径化することで断面積
を小さくし、その先端部にラッパ状に拡開する膨径部を
設置した構造に特徴づけられるが、特にホーン先端部の
膨径部と該膨径部より後部側の小径部との間の段差曲面
が単一Ｒ形状もしくは複合Ｒ形状になるように設計する
ことが好ましい態様となる。またホーン先端部のラッパ
状に拡開する膨径部には、凹状の窪み部を設けて拡開縁
部を肉薄形状とすることが望ましい。The ultrasonic horn of the present invention has a horn shape in which the horn tip portion has a small diameter and the vibrator side has a large diameter portion, and the diameter of the horn tip portion is made as small as possible to reduce the cross-sectional area and the tip portion thereof. It is characterized by a structure in which a bulging portion that expands like a trumpet is installed on the horn, and in particular, a step curved surface between the bulging portion of the horn tip and the small diameter portion on the rear side of the bulging portion has a single R shape Alternatively, it is a preferred embodiment to design to have a complex R shape. Further, it is desirable that a dented portion having a concave shape is provided in the bulging portion of the horn tip portion that expands in a trumpet shape so that the expanding edge portion has a thin shape.

【０００９】なお、上記の単一Ｒ形状とは、曲率半径の
中心位置が１点で描かれる単一の円弧曲線を意味し、複
合Ｒ形状とは、曲率半径と中心位置が異なる複数の円弧
を接続の位置で接続した連続的な曲線を指し、この場合
には単一Ｒ形状に比べて拡開比率が大きくなる。The above-mentioned single R shape means a single arc curve in which the center position of the radius of curvature is drawn at one point, and the compound R shape is a plurality of arcs having different radius of curvature and center positions. Indicates a continuous curve connecting at the connecting position, and in this case, the expansion ratio is larger than that of the single R shape.

【００１０】[0010]

【作用】本発明に係る超音波手術用具のホーンは、ホー
ン先端部にラッパ状に拡開する膨径部が形成されている
ため、ホーン先端部が小径であるにも拘らず先端での作
用部は大きな面積が得られる。とくに前記の膨径部と小
径部との間に形成される段差曲面を、単一Ｒ形状もしく
は複合Ｒ形状とし、膨径部の内面に凹状の窪み部を形成
して肉薄形状に設計することにより、先端の作用面積の
増大と共に超音波エネルギーの円滑な伝達を図ることが
できる。In the horn of the ultrasonic surgical instrument according to the present invention, the horn has a bulging portion that expands like a trumpet at the tip of the horn. A large area can be obtained. In particular, the stepped curved surface formed between the bulging portion and the small diameter portion should be a single R shape or a composite R shape, and a concave portion should be formed on the inner surface of the bulging portion to design a thin shape. As a result, the active area of the tip can be increased and the ultrasonic energy can be smoothly transmitted.

【００１１】また、膨径部の形成は、大径部分に対する
ホーン先端部の断面積比率を相対的に大きくすることを
可能とし、一層の小径化が図られるから、振幅拡大率が
効果的に増大する。Further, the formation of the bulging portion makes it possible to relatively increase the cross-sectional area ratio of the horn tip portion to the large diameter portion and further reduce the diameter. Increase.

【００１２】このように、ホーン先端に高い振幅が伝達
され、同時に先端の作用部は大きな面積が得られるた
め、特に頭蓋骨内底や軟骨の切削、肝硬変や体表面積の
痣の除去手術等の比較的広い面積を破砕吸引除去する場
合に、非常に効率的な手術を行うことができる。In this way, a high amplitude is transmitted to the tip of the horn, and at the same time, a large area of the action portion of the tip is obtained. A very efficient operation can be performed when crushing and removing a large area by suction.

【００１３】[0013]

【実施例】以下、本発明を図１〜図３に示した実施例に
基づいて詳細に説明する。なお、実施例ではステップ形
状について説明するが、本発明はこの形状に限定される
ものではなく、コニカル形、エクスポネンシャル形、カ
テノイダル形などホーン先端が小径のタイプであれば全
ての超音波ホーンが適用対象となる。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the embodiments shown in FIGS. In addition, although the step shape is described in the embodiment, the present invention is not limited to this shape, and any ultrasonic horn such as a conical type, an exponential type, and a catenoidal type can be used as long as the horn tip has a small diameter type. Is applicable.

【００１４】図１は本発明に係る超音波手術用具のホー
ンの全体断面図を示したもので、（１）は中心部を貫通
して破砕した組織を吸引除去する吸引孔、（２）は基端
部に設置された接続部、（３）はホーン先端部分の小径
部、（４）は振動子側の大径部、（５）はホーン先端部
の膨径部である。FIG. 1 shows an overall cross-sectional view of a horn of an ultrasonic surgical tool according to the present invention. (1) is a suction hole for penetrating and removing the crushed tissue by penetrating the central portion, and (2) is A connecting portion installed at the base end portion, (3) is a small diameter portion at the tip of the horn, (4) is a large diameter portion at the transducer side, and (5) is an expanded diameter portion at the tip of the horn.

【００１５】高い振幅拡大率を得るためには、小径部
（３）と大径部（４）の断面積比を大きくすることが効
率的であるが、実用上は、ハンドピースの操作性の点か
ら大径部（４）の外径は約１６ｍｍが限度である。頭蓋
骨内底や軟骨、あるいは肝硬変の肝細胞を効率良く破砕
するためには、２５０〜３００μｍの振幅が必要であ
り、大径部（４）の外径が１６ｍｍ程度の場合、上記の
振幅を得るための小径部（３）の外径は約２．３〜２．
５ｍｍとなる。In order to obtain a high amplitude expansion rate, it is effective to increase the cross-sectional area ratio of the small diameter portion (3) and the large diameter portion (4), but in practical use, the operability of the handpiece is reduced. From the point, the outer diameter of the large diameter portion (4) is limited to about 16 mm. An amplitude of 250 to 300 μm is required to efficiently disrupt hepatocytes of the inner wall of the skull, cartilage, or liver cirrhosis, and the above amplitude is obtained when the outer diameter of the large diameter part (4) is about 16 mm. The outer diameter of the small-diameter portion (3) is about 2.3 to 2.
5 mm.

【００１６】図４に示した従来のホーンでは、その作用
面積が小さく、頭蓋骨内底や軟骨、あるいは広範囲の痣
に関しては、細かい細工のためには好都合ではあるもの
の、大部分の大胆に切削しても差しつかえない部位につ
いては非効率的である。The conventional horn shown in FIG. 4 has a small operating area, and although it is convenient for fine workmanship, most of the bold cutting is performed on the inner base of the skull, cartilage, and a wide range of bruise. However, it is inefficient for the parts that can be used.

【００１７】本発明の超音波手術用具のホーンは、先端
の膨径部（５）の外径を、例えば４〜５ｍｍとすること
で作用面積が増大し、広範囲の部位に対して効率の良い
破砕を行うことができる。膨径部（５）の外径に関して
は特に制約をしないが、先端部が受ける負荷が大きくな
り発振の妨げとならないためには、１０ｍｍ以下とする
のが好ましい。In the horn of the ultrasonic surgical instrument of the present invention, the working area is increased by setting the outer diameter of the bulging portion (5) at the tip to, for example, 4 to 5 mm, and the efficiency is good for a wide range of sites. Crushing can be done. The outer diameter of the bulging portion (5) is not particularly limited, but it is preferably 10 mm or less so that the load applied to the tip portion does not increase and does not hinder oscillation.

【００１８】ホーン先端部の膨径部（５）と該膨径部よ
り後部側の小径部（３）との間の段差曲面（６）は、膨
径部（５）に超音波エネルギーが円滑に伝達するように
単一Ｒ形状もしくは複合Ｒ形状をなす連続的な円弧曲面
に形成することが好ましい。また、膨径部（５）は低重
量であるほど超音波発振の負荷が掛からないので、実用
強度が保てる範囲で膨径部（５）の内面を凹状に切削し
て拡開縁部を肉薄形状とするのが望ましい。The stepped curved surface (6) between the bulging portion (5) at the tip of the horn and the small diameter portion (3) on the rear side of the bulging portion allows the ultrasonic energy to flow smoothly to the bulging portion (5). It is preferable to form a continuous R-shaped curved surface having a single R shape or a composite R shape so as to be transmitted. In addition, since the bulging portion (5) is less loaded with ultrasonic oscillation as the weight is lower, the inner surface of the bulging portion (5) is cut in a concave shape within the range where practical strength can be maintained, so that the bulging edge is thinned. It is desirable to have a shape.

【００１９】図２は、膨径部（５）の内面に凹状の窪み
部（７）を形成して肉薄形状としたホーン先端部を例示
したものである。また、図３は図２とは異なる椀形状の
膨径部（５）とし、その内面をくり抜いて窪み部（７）
を形成した態様である。このようにして膨径部（５）を
軽量化することにより超音波エネルギーがホーン先端に
一層円滑に伝達される。FIG. 2 exemplifies a thin horn tip portion in which a concave portion (7) is formed on the inner surface of the bulging portion (5). Also, FIG. 3 shows a bowl-shaped bulging portion (5) different from that of FIG. 2, and hollowing out the inner surface of the bowl portion (7).
Is a mode in which By reducing the weight of the bulging portion (5) in this manner, ultrasonic energy is transmitted to the tip of the horn more smoothly.

【００２０】超音波ホーンの材質は、チタン合金、アル
ミニウム合金、ステンレス鋼などの耐腐食性のある金属
であって、音速が１０００〜６０００ｍ／ｓｅｃ程度の
超音波振動に十分耐える材料で構成される。最も好まし
い材質はチタン合金である。The material of the ultrasonic horn is a metal having corrosion resistance such as titanium alloy, aluminum alloy, stainless steel, etc., and is composed of a material having a sufficient ultrasonic vibration with a sound velocity of about 1000 to 6000 m / sec. . The most preferred material is titanium alloy.

【００２１】[0021]

【発明の効果】以上のとおり、本発明の超音波手術用具
のホーンは、小径のホーン先端部にラッパ状に拡開する
膨径部が形成されているから、従来の超音波手術用具の
ホーンに比べて、高い振幅を維持しながら、広い面積を
破砕吸引除去できるので、破砕効率が著しく高まり、手
術時間の短縮が期待でき、また、先端の面積が広い分な
めらかな切削面とすることができる。As described above, since the horn of the ultrasonic surgical instrument of the present invention has the bulging portion that expands like a trumpet at the tip of the small-diameter horn, the horn of the conventional ultrasonic surgical instrument is formed. Compared with, it is possible to crush and remove a large area while maintaining a high amplitude, so the crushing efficiency can be significantly increased, the operation time can be expected to be shortened, and the wide tip area allows for a smooth cutting surface. it can.

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

【図１】本発明に係る超音波手術用具のホーンを例示し
た全体断面図である。FIG. 1 is an overall sectional view illustrating a horn of an ultrasonic surgical instrument according to the present invention.

【図２】膨径部の内面に凹状の窪み部を設けた構造のホ
ーン先端部を示した部分断面説明図である。FIG. 2 is a partial cross-sectional explanatory view showing a horn tip portion having a structure in which a concave portion is provided on the inner surface of the bulging portion.

【図３】膨径部の内面に凹状の窪み部を設けた別の構造
のホーン先端部を示した部分断面説明図である。FIG. 3 is a partial cross-sectional explanatory view showing a horn tip portion of another structure in which a concave portion is provided on the inner surface of the bulging portion.

【図４】従来構造による超音波手術用具のホーンを示し
た全体断面図である。FIG. 4 is an overall cross-sectional view showing a horn of an ultrasonic surgical instrument having a conventional structure.

【符号の説明】[Explanation of symbols]

１，１４ 吸引孔 ２，１２ 接続部 ３ 小径部 ４ 大径部 ５ 膨径部 ６ 段差曲面 ７ 窪み部 １１ ホーン １３ 作用部 1,14 Suction hole 2,12 Connection part 3 Small diameter part 4 Large diameter part 5 Expanded diameter part 6 Stepped curved surface 7 Recessed part 11 Horn 13 Working part

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 超音波振動により生体組織を破砕し、吸
引除去する超音波手術用具のホーンにおいて、大径部分
に連続する小径のホーン先端部にラッパ状に拡開する膨
径部を有することを特徴とする超音波手術用具のホー
ン。1. A horn of an ultrasonic surgical instrument for crushing living tissue by ultrasonic vibration and removing by suction, having a small-diameter horn tip continuous with a large-diameter portion and having a bulging portion that expands like a trumpet. Ultrasonic surgical tool horn. 【請求項２】 ホーン先端部の膨径部と該膨径部より後
部側の小径部との間の段差曲面が単一Ｒ形状もしくは複
合Ｒ形状をなす、請求項１記載の超音波手術用具のホー
ン。2. The ultrasonic surgical instrument according to claim 1, wherein the step curved surface between the bulging portion at the tip of the horn and the small diameter portion on the rear side of the bulging portion has a single R shape or a composite R shape. Horn. 【請求項３】 ホーン先端部のラッパ状に拡開する膨径
部が、内面に凹状の窪み部が形成された肉薄形状であ
る、請求項１または２記載の超音波手術用具のホーン。3. The horn for an ultrasonic surgical instrument according to claim 1, wherein the bulging portion of the tip of the horn that expands like a trumpet has a thin shape with a concave recess formed on the inner surface.
JP6168121A 1994-07-20 1994-07-20 Horn for ultrasonic operation apparatus Pending JPH0824266A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6168121A JPH0824266A (en) 1994-07-20 1994-07-20 Horn for ultrasonic operation apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6168121A JPH0824266A (en) 1994-07-20 1994-07-20 Horn for ultrasonic operation apparatus

Publications (1)

Publication Number Publication Date
JPH0824266A true JPH0824266A (en) 1996-01-30

Family

ID=15862246

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6168121A Pending JPH0824266A (en) 1994-07-20 1994-07-20 Horn for ultrasonic operation apparatus

Country Status (1)

Country Link
JP (1) JPH0824266A (en)

Cited By (137)

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