JP2021037084A - Chip for being provided in ultrasonic debridement instrument - Google Patents

Chip for being provided in ultrasonic debridement instrument Download PDF

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JP2021037084A
JP2021037084A JP2019160204A JP2019160204A JP2021037084A JP 2021037084 A JP2021037084 A JP 2021037084A JP 2019160204 A JP2019160204 A JP 2019160204A JP 2019160204 A JP2019160204 A JP 2019160204A JP 2021037084 A JP2021037084 A JP 2021037084A
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tip
chip
discharge port
liquid
inclined surface
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JP7403260B2 (en
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香奈代 齊藤
Kanayo Saito
香奈代 齊藤
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Gunze Ltd
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Gunze Ltd
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Priority to KR2020200003109U priority patent/KR20210000602U/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B17/22004—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves
    • A61B17/22012—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves in direct contact with, or very close to, the obstruction or concrement
    • A61B17/2202—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves in direct contact with, or very close to, the obstruction or concrement the ultrasound transducer being inside patient's body at the distal end of the catheter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B17/3203—Fluid jet cutting instruments
    • A61B17/32037—Fluid jet cutting instruments for removing obstructions from inner organs or blood vessels, e.g. for atherectomy
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M3/00—Medical syringes, e.g. enemata; Irrigators
    • A61M3/02—Enemata; Irrigators
    • A61M3/0279—Cannula; Nozzles; Tips; their connection means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B17/22004—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves
    • A61B2017/22005—Effects, e.g. on tissue
    • A61B2017/22007—Cavitation or pseudocavitation, i.e. creation of gas bubbles generating a secondary shock wave when collapsing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B17/22004—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves
    • A61B2017/22005—Effects, e.g. on tissue
    • A61B2017/22011—Combined types of vibration, e.g. ultrasonic and electrohydraulic
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
    • A61B2017/320069—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic for ablating tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
    • A61B2017/320072—Working tips with special features, e.g. extending parts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
    • A61B2017/320084—Irrigation sleeves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B17/3203—Fluid jet cutting instruments
    • A61B2017/32032—Fluid jet cutting instruments using cavitation of the fluid
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N7/00—Ultrasound therapy
    • A61N2007/0004—Applications of ultrasound therapy
    • A61N2007/0017—Wound healing

Abstract

To provide a chip for being provided in an ultrasonic debridement instrument, the inside of which is not clogged with necrotic tissue, a contaminant and the like during the execution of emulsification and elimination.SOLUTION: A chip for being provided in an ultrasonic debridement instrument is constituted so that ultrasonic vibrations can be transmitted from an ultrasonic debridement instrument body and so that a liquid supplied from the body can be discharged toward the human body. The chip 5 comprises a discharge opening 52T for discharging the liquid to a tip side, and a chip part 53 that is constituted like a plate. The chip part 53 has an inclined surface 53A that is hit by the liquid discharged from the discharge opening 52T.SELECTED DRAWING: Figure 2

Description

本発明は、超音波デブリードマン器具に備えるチップに関する。 The present invention relates to a chip provided in an ultrasonic debridement instrument.

超音波外科措置機器としての超音波デブリードマン器具は、超音波による機械的振動及びチップから吐出される液体（例えば生理食塩液等）を用いて、人体の軟組織を乳化、除去、洗浄する。機械的振動及び超音波エネルギーを与えながら軟組織の創部に生理食塩液等を吐出（噴霧）することで液体に生じた真空の気泡が破裂（キャビテーション）する。これにより生じる衝撃波を利用して、健常組織を温存しながら壊死組織や汚染物質等を乳化、除去し、創部の清浄化を図る。また、弾力性がある組織は、超音波振動エネルギーを吸収するため、血管、神経等は温存される。 The ultrasonic debridement instrument as an ultrasonic surgical procedure device emulsifies, removes, and cleans the soft tissues of the human body by using mechanical vibration by ultrasonic waves and a liquid (for example, physiological saline) discharged from the tip. Vacuum bubbles generated in the liquid burst (cavitation) by discharging (spraying) physiological saline or the like to the wound of the soft tissue while applying mechanical vibration and ultrasonic energy. The shock wave generated by this is used to emulsify and remove necrotic tissue and pollutants while preserving healthy tissue to clean the wound. In addition, elastic tissue absorbs ultrasonic vibration energy, so that blood vessels, nerves, etc. are preserved.

図５（ａ），（ｂ）に、上記超音波デブリードマン器具に備えるチップ１０を示している。このチップ１０は、施術時に人体に面する部分が開放された開口部１０Ａを備え、正対視で真円状の周壁部を有するカップ状に構成されている。また、チップ１０の内壁面には、液体をチップ１０の内部へ吐出（噴霧）するための開口Ｋが形成されている（例えば、非特許文献１参照）。 5 (a) and 5 (b) show the tip 10 provided in the ultrasonic debridement device. The tip 10 is provided with an opening 10A in which a portion facing the human body is opened at the time of treatment, and is configured in a cup shape having a perfectly circular peripheral wall portion in front view. Further, an opening K for discharging (spraying) the liquid into the inside of the chip 10 is formed on the inner wall surface of the chip 10 (see, for example, Non-Patent Document 1).

「メスを使わないデブリードマン」に新手法、井田恭子、日経メディカル、２０１４年７月２９日https://medical.nikkeibp.co.jp/leaf/mem/pub/report/201407/537691.htmlNew method for "debridement without scalpel", Kyoko Ida, Nikkei Medical, July 29, 2014 https://medical.nikkeibp.co.jp/leaf/mem/pub/report/201407/537691.html

非特許文献１のチップが、比較的大きな体積を有するカップ状に構成されているため、乳化、除去された壊死組織や汚染物質等がチップの内部に堆積してしまい、チップ内が壊死組織や汚染物質等で詰まってしまうことがある。すると、液体を開口から吐出するのが難しくなる。そのため、乳化、除去を行っている最中にチップ内に詰まった壊死組織や汚染物質等を頻繁に取り除くことが多くなり、作業性が悪く、早期改善が要望されている。 Since the chip of Non-Patent Document 1 is formed in a cup shape having a relatively large volume, emulsified and removed necrotic tissue, contaminants, etc. are deposited inside the chip, and the inside of the chip is necrotic tissue or It may be clogged with pollutants. Then, it becomes difficult to discharge the liquid from the opening. Therefore, necrotic tissues and contaminants stuck in the chip are often removed during emulsification and removal, resulting in poor workability and early improvement is required.

そこで、本発明は、かかる実情に鑑み、乳化、除去を行っている最中に内部が壊死組織や汚染物質等で詰まることがない超音波デブリードマン器具に備えるチップを提供することを課題とする。 Therefore, in view of such circumstances, it is an object of the present invention to provide a chip for an ultrasonic debridement device in which the inside is not clogged with necrotic tissue, contaminants, etc. during emulsification and removal. To do.

本発明に係る超音波デブリードマン器具に備えるチップは、超音波デブリードマン器具の本体から超音波振動が伝達され、前記本体から供給された液体を人体に向けて吐出するように構成された超音波デブリードマン器具に備えるチップであって、前記チップは、前記液体を先端側に吐出する吐出口と、板状に構成されたチップ部と、を備え、該チップ部は、前記吐出口から吐出される液体に当たる傾斜面を備えていることを特徴としている。 The chip provided in the ultrasonic debridement device according to the present invention is configured such that ultrasonic vibration is transmitted from the main body of the ultrasonic debridement device and the liquid supplied from the main body is discharged toward the human body. A chip provided in an ultrasonic debridement instrument, the chip includes a discharge port for discharging the liquid to the tip side and a plate-shaped chip portion, and the chip portion is the discharge port. It is characterized by having an inclined surface that hits the liquid discharged from.

かかる構成によれば、組織の創部に超音波振動を与えながら液体を吐出することで脆弱となった壊死組織や汚染物質等を、チップ部の縁で軽く擦り取る。擦り取った壊死組織や汚染物質等が、板状に構成されたチップ部に堆積されることがない。しかも、チップ部が、吐出口から吐出される液体に当たる傾斜面を備えているので、付着しようとする壊死組織や汚染物質等を傾斜面に当たる液体で阻止することができる。 According to this configuration, necrotic tissue, contaminants, etc., which have become fragile due to the discharge of liquid while applying ultrasonic vibration to the wound portion of the tissue, are lightly scraped off by the edge of the chip portion. The scraped necrotic tissue, contaminants, etc. will not be deposited on the plate-shaped chip. Moreover, since the chip portion has an inclined surface that hits the liquid discharged from the discharge port, necrotic tissue or contaminants that are about to adhere can be blocked by the liquid that hits the inclined surface.

また、本発明に係る超音波デブリードマン器具に備えるチップは、前記チップ部が、平板状で、かつ、先端側ほど幅広となるように構成され、前記チップ部の傾斜面が、前記吐出口から延びる吐出経路に対して傾斜していてもよい。 Further, the tip provided in the ultrasonic debridement device according to the present invention is configured such that the tip portion is flat and wider toward the tip side, and the inclined surface of the tip portion is the discharge port. It may be inclined with respect to the discharge path extending from.

上記のように、先端側ほど幅広となるチップ部を用いて広範囲にわたる創傷を効率よく処理することができる。また、チップ部の傾斜面の傾斜角度を調整することによって、傾斜面における液体の反射角度を自由に設定できる。 As described above, a wide range of wounds can be efficiently treated by using the tip portion that becomes wider toward the tip side. Further, by adjusting the inclination angle of the inclined surface of the tip portion, the reflection angle of the liquid on the inclined surface can be freely set.

また、本発明に係る超音波デブリードマン器具に備えるチップは、前記チップ部が、前記傾斜面への正対視で該チップ部の長手方向に長い略長円状又は略楕円状で、かつ、板厚方向のうちの一側に前記傾斜面を構成する湾曲した窪み部を備え、該窪み部の基端側内面に前記吐出口を備え、該吐出口から吐出される液体が前記窪み部の先端側内面に当たるように該吐出口を構成していてもよい。 Further, in the chip provided in the ultrasonic debridement apparatus according to the present invention, the chip portion has a substantially oblong shape or a substantially elliptical shape in which the tip portion is long in the longitudinal direction of the tip portion when viewed in front of the inclined surface. , A curved recess forming the inclined surface is provided on one side in the plate thickness direction, the discharge port is provided on the inner surface on the base end side of the recess, and the liquid discharged from the discharge port is the recess. The discharge port may be configured so as to hit the inner surface on the tip side of the device.

上記のように、チップ部が略長円状又は略楕円状であるので、複雑な創傷に対して壊死組織や汚染物質等を擦り取る際に創傷の狭い部分にも対応することができる。また、チップ部が、長手方向に長い窪み部を備えるとともに液体が長手方向に吐出されるので、擦り取った壊死組織や汚染物質等が、窪み部に詰まり難い。しかも、吐出口から吐出される液体が窪み部の先端側内面に当たるので、窪み部の先端部で擦り取られた壊死組織や汚染物質等が窪み部の先端側内面に付着することを防止できる。 As described above, since the tip portion has a substantially oval shape or a substantially elliptical shape, it is possible to cope with a narrow portion of the wound when scraping necrotic tissue, contaminants, etc. against a complicated wound. Further, since the tip portion is provided with a recessed portion long in the longitudinal direction and the liquid is discharged in the longitudinal direction, the necrotic tissue or contaminants scraped off are less likely to be clogged in the recessed portion. Moreover, since the liquid discharged from the discharge port hits the inner surface on the tip side of the recessed portion, it is possible to prevent necrotic tissue, contaminants, etc. scraped off at the tip end portion of the recessed portion from adhering to the inner surface on the tip end side of the recessed portion.

以上より、本発明によれば、板状に構成されたチップ部を備え、そのチップ部が吐出口から吐出される液体に当たる傾斜面を備えていることによって、乳化、除去を行っている最中に内部が壊死組織や汚染物質等で詰まることがない超音波デブリードマン器具に備えるチップを提供することができる。 From the above, according to the present invention, the chip portion is provided in a plate shape, and the chip portion is provided with an inclined surface that hits the liquid discharged from the discharge port, so that emulsification and removal are being performed. It is possible to provide a chip for an ultrasonic debridement device whose inside is not clogged with necrotic tissue or contaminants.

本発明の第１実施形態のチップを備えた超音波デブリードマン器具の斜視図である。It is a perspective view of the ultrasonic debridement apparatus provided with the chip of 1st Embodiment of this invention. 同チップを示し、（ａ）は底面図、（ｂ）は側面図である。The chip is shown, (a) is a bottom view, and (b) is a side view. 本発明の第２実施形態のチップを示し、（ａ）は底面図、（ｂ）は側面図である。The chip of the second embodiment of this invention is shown, (a) is a bottom view, (b) is a side view. 本発明の第３実施形態のチップを示し、（ａ）は底面図、（ｂ）は側面図、（ｃ）はチップ部の断面図である。The chip of the third embodiment of the present invention is shown, (a) is a bottom view, (b) is a side view, and (c) is a cross-sectional view of a chip portion. 従来のチップを示し、（ａ）は側面図、（ｂ）は底部側から見た図である。A conventional chip is shown, (a) is a side view, and (b) is a view seen from the bottom side.

以下、本発明に係る３種類のチップについて、図面を参照しつつ説明する。 Hereinafter, the three types of chips according to the present invention will be described with reference to the drawings.

＜第１実施形態＞
まず、超音波外科措置機器としての超音波デブリードマン器具について説明する。図１に示すように、超音波デブリードマン器具１は、本体２と、フットスイッチ３と、ハンドピース４と、ハンドピース４の先端に着脱可能に取り付けられたチップ５と、を備えている。なお、デブリードマンとは、壊死組織や汚染物質等を除去して創部を清浄化する治療法のことである。 <First Embodiment>
First, an ultrasonic debridement instrument as an ultrasonic surgical procedure device will be described. As shown in FIG. 1, the ultrasonic debridement instrument 1 includes a main body 2, a foot switch 3, a handpiece 4, and a tip 5 detachably attached to the tip of the handpiece 4. .. Debridement is a treatment method that cleans the wound by removing necrotic tissue, contaminants, and the like.

本体２は、チップ５に伝達するための超音波を発生する超音波発生器（図示せず）と、チップ５に液体（ここでは、生理食塩液）を供給する液体供給部（図示せず）と、を備えている。 The main body 2 has an ultrasonic generator (not shown) that generates ultrasonic waves to be transmitted to the chip 5, and a liquid supply unit (not shown) that supplies a liquid (here, physiological saline) to the chip 5. And have.

フットスイッチ３は、本体２の超音波発生器に電気的に接続されていて、超音波発生器の出力レンジを調整するための足で操作可能なスイッチである。 The foot switch 3 is a switch that is electrically connected to the ultrasonic generator of the main body 2 and can be operated by a foot for adjusting the output range of the ultrasonic generator.

ハンドピース４は、コード７を介して本体２に接続され、例えば圧電材料で構成されており、超音波の振動波がチップ５に確実に伝播されるようになっている。また、本体２には、液体供給部からの液体を供給する合成樹脂製のチューブ６が接続されている。前記チューブ６の先端が前記コード７に接続されており、ハンドピース４に液体が供給されてからチップ５へ供給されるようになっている。 The handpiece 4 is connected to the main body 2 via a cord 7, and is made of, for example, a piezoelectric material, so that an ultrasonic vibration wave is reliably propagated to the chip 5. Further, a synthetic resin tube 6 for supplying the liquid from the liquid supply unit is connected to the main body 2. The tip of the tube 6 is connected to the cord 7, and the liquid is supplied to the handpiece 4 and then to the chip 5.

チップ５は、ステンレス製であり、図２（ａ），（ｂ）に示すように、ハンドピース４の先端部に形成されている雌ネジ部（図示せず）にねじ止めされる雄ネジ部５１と、中間部５２と、先端部となるチップ部５３と、を備えている。 The tip 5 is made of stainless steel, and as shown in FIGS. 2A and 2B, a male screw portion screwed to a female screw portion (not shown) formed at the tip portion of the handpiece 4 A 51, an intermediate portion 52, and a tip portion 53 serving as a tip portion are provided.

中間部５２は、雄ネジ部５１の先端に雄ネジ部５１の外径よりも大きな径を有し、先端側ほど径が小さくなるテーパー形状の鍔部５２Ａと、鍔部５２Ａの先端から略同一径で前方に延びる第１円筒部５２Ｂと、第１円筒部５２Ｂの先端から先端側ほど径が小さくなる第１テーパー部５２Ｃと、その第１テーパー部５２Ｃの先端から略同一径で前方に延びる第２円筒部５２Ｄと、を備えている。第１円筒部５２Ｂの先端部の左右両側のそれぞれには、中間部５２を２つの指で支持して創部を清浄化している最中に、中間部５２が回転しないように中間部５２を確実に支持するためのフラット面５２ｆが形成されている。 The intermediate portion 52 has a diameter larger than the outer diameter of the male screw portion 51 at the tip of the male screw portion 51, and is substantially the same as the tapered flange portion 52A whose diameter becomes smaller toward the tip side from the tip of the flange portion 52A. The first cylindrical portion 52B extending forward in diameter, the first tapered portion 52C whose diameter decreases from the tip of the first cylindrical portion 52B toward the tip side, and the first tapered portion 52C extending forward in substantially the same diameter from the tip of the first tapered portion 52C. It includes a second cylindrical portion 52D. On each of the left and right sides of the tip of the first cylindrical portion 52B, secure the intermediate portion 52 so that the intermediate portion 52 does not rotate while the intermediate portion 52 is supported by two fingers to clean the wound. A flat surface 52f is formed to support the surface.

チップ部５３は、第２円筒部５２Ｄから延び、かつ、第２円筒部５２Ｄよりも厚みが薄くなる板状で、先端側ほど幅広となる形状に構成されている。また、チップ部５３は、基端部が液体を吐出する吐出経路Ｔ１を挟んで一方側（第２円筒部５２Ｄ側）に位置し、かつ、先端部が他方側（第２円筒部５２Ｄから離間する側）に位置するように、基端部が後述する吐出口５２Ｔ側へ所定角度θ１（図２（ｂ）では１３０度下方へ）折り曲げられた擦り取り部を備えている。前記のように、チップ部５３の基端部が折り曲げられることにより、チップ部５３が吐出経路Ｔ１を横切ることで、吐出口５２Ｔから吐出される液体に斜めに当たる傾斜面５３Ａをチップ部５３に備えている。この傾斜面５３Ａは、先端側ほど吐出口５２Ｔから遠ざかるように構成されている。 The tip portion 53 has a plate shape that extends from the second cylindrical portion 52D and is thinner than the second cylindrical portion 52D, and is configured to be wider toward the tip side. Further, the tip portion 53 is located on one side (second cylindrical portion 52D side) with the base end portion sandwiching the discharge path T1 for discharging the liquid, and the tip portion is separated from the other side (second cylindrical portion 52D side). The base end portion is provided with a scraping portion that is bent at a predetermined angle θ1 (130 degrees downward in FIG. 2B) toward the discharge port 52T side, which will be described later, so as to be located on the side). As described above, the tip portion 53 is provided with an inclined surface 53A that obliquely hits the liquid discharged from the discharge port 52T by bending the base end portion of the tip portion 53 so that the tip portion 53 crosses the discharge path T1. ing. The inclined surface 53A is configured so as to be farther from the discharge port 52T toward the tip end side.

また、第１テーパー部５２Ｃの厚み方向一側（図２（ｂ）では下側面）に、チューブ６に供給される液体を先端側へ吐出するための吐出口５２Ｔ（図２（ａ）参照）が形成されている。この吐出口５２Ｔから吐出された液体が、先端（前方）側へ第２円筒部５２Ｄの軸心と略平行な状態で吐出されて、前記傾斜面５３Ａに当たって向きが変わり、除去すべき人体の組織に当たる。 Further, on one side of the first tapered portion 52C in the thickness direction (lower side surface in FIG. 2B), a discharge port 52T for discharging the liquid supplied to the tube 6 to the tip side (see FIG. 2A). Is formed. The liquid discharged from the discharge port 52T is discharged toward the tip (front) side in a state substantially parallel to the axis of the second cylindrical portion 52D, hits the inclined surface 53A, changes its direction, and is a tissue of the human body to be removed. It hits.

また、チップ部５３は、平面視において略三角形状に構成され、先端の幅方向両端が角の取れた湾曲形状になっている。また、チップ部５３の先端部は、壊死組織や汚染物質等を擦り取り易いように、先端側ほど厚みが薄くなっている。具体的には、チップ部５３の先端部は、図２（ｂ）に示すように、上面（外面）側にテーパー面５３Ｂを備えている。 Further, the tip portion 53 is formed in a substantially triangular shape in a plan view, and has a curved shape with both ends in the width direction of the tip having rounded corners. Further, the tip portion of the tip portion 53 is thinner toward the tip side so that necrotic tissue, contaminants, and the like can be easily scraped off. Specifically, as shown in FIG. 2B, the tip portion of the chip portion 53 is provided with a tapered surface 53B on the upper surface (outer surface) side.

上記構成の超音波デブリードマン器具を用いて、組織の創部に超音波振動を与えながら液体を吐出することで脆弱となった壊死組織や汚染物質等を、チップ部５３の先端縁で軽く擦り取る。擦り取った壊死組織や汚染物質等が、板状に構成されたチップ部５３に堆積されることがない。しかも、チップ部５３が、吐出口５２Ｔから吐出される液体に当たる傾斜面５３Ａを備えているので、付着しようとする壊死組織や汚染物質等を傾斜面５３Ａに当たる液体で阻止することができる。また、チップ部５３は、先端側ほど幅広となる形状にしているので、広範囲にわたる創傷を効率よく処理することができる。また、チップ部５３の傾斜面５３Ａの傾斜角度を調整することによって、傾斜面５３Ａにおける液体の反射角度を自由に設定できる。 Using the ultrasonic debridement instrument with the above configuration, lightly rub the necrotic tissue, contaminants, etc. that became fragile by discharging the liquid while applying ultrasonic vibration to the wound of the tissue with the tip edge of the tip portion 53. take. The scraped necrotic tissue, contaminants, etc. will not be deposited on the chip portion 53 formed in a plate shape. Moreover, since the chip portion 53 includes an inclined surface 53A that hits the liquid discharged from the discharge port 52T, necrotic tissues and contaminants that are about to adhere can be blocked by the liquid that hits the inclined surface 53A. Further, since the tip portion 53 has a shape that becomes wider toward the tip side, it is possible to efficiently treat a wide range of wounds. Further, by adjusting the inclination angle of the inclined surface 53A of the tip portion 53, the reflection angle of the liquid on the inclined surface 53A can be freely set.

＜第２実施形態＞
第１実施形態のチップ５のチップ部５３の形状が少し異なる形状の第２実施形態のチップ部５４が、図３（ａ），（ｂ）に示されている。 <Second Embodiment>
The chip portion 54 of the second embodiment having a slightly different shape of the chip portion 53 of the chip 5 of the first embodiment is shown in FIGS. 3 (a) and 3 (b).

図３（ａ），（ｂ）に示すチップ５は、第１実施形態のチップ５と同様に、ステンレス製であり、ハンドピース４の先端部に形成されている雌ネジ部（図示せず）にねじ止めされる雄ネジ部５１と、中間部５２と、第１実施形態のチップ部５３とは異なる形状のチップ部５４と、を備えている。 The tip 5 shown in FIGS. 3 (a) and 3 (b) is made of stainless steel like the tip 5 of the first embodiment, and has a female screw portion (not shown) formed at the tip of the handpiece 4. It includes a male screw portion 51 screwed to, an intermediate portion 52, and a tip portion 54 having a shape different from that of the tip portion 53 of the first embodiment.

中間部５２は、雄ネジ部５１の先端に雄ネジ部５１の外径よりも大きな径を有し、先端側ほど径が小さくなるテーパー形状の鍔部５２Ａと、鍔部５２Ａの先端から略同一径で前方に延びる第１円筒部５２Ｂと、第１円筒部５２Ｂの先端から先端側ほど径が小さくなる第１テーパー部５２Ｃと、その第１テーパー部５２Ｃの先端から略同一径で前方に延びる第２円筒部５２Ｄと、を備えている。第１円筒部５２Ｂの先端部の左右両側のそれぞれには、中間部５２を２つの指で支持して創部を清浄化している最中に、中間部５２が回転しないように中間部５２を確実に支持するためのフラット面５２ｆが形成されている。 The intermediate portion 52 has a diameter larger than the outer diameter of the male screw portion 51 at the tip of the male screw portion 51, and is substantially the same as the tapered flange portion 52A whose diameter becomes smaller toward the tip side from the tip of the flange portion 52A. The first cylindrical portion 52B extending forward in diameter, the first tapered portion 52C whose diameter decreases from the tip of the first cylindrical portion 52B toward the tip side, and the first tapered portion 52C extending forward in substantially the same diameter from the tip of the first tapered portion 52C. It includes a second cylindrical portion 52D. On each of the left and right sides of the tip of the first cylindrical portion 52B, secure the intermediate portion 52 so that the intermediate portion 52 does not rotate while the intermediate portion 52 is supported by two fingers to clean the wound. A flat surface 52f is formed to support the surface.

チップ部５４は、第２円筒部５２Ｄから延び、かつ、第２円筒部５２Ｄよりも厚みが薄くなる板状で、先端側ほど幅広となるように構成されている。また、チップ部５４は、基端部が液体を吐出する吐出経路Ｔ１を挟んで一方側（第２円筒部５２Ｄ側）に位置し、かつ、先端部が他方側（第２円筒部５２Ｄから離間する側）に位置するように、基端部が後述する吐出口５２Ｔ側へ所定角度θ１（図２（ｂ）では１３０度下方へ）折り曲げられた擦り取り部を備えている。前記のように、チップ部５４の基端部が折り曲げられてチップ部５４が吐出経路Ｔ１を横切ることで、吐出口５２Ｔから吐出される液体に当たる傾斜面５４Ａをチップ部５４に備えている。また、第２実施形態のチップ部５４は、第１実施形態のチップ部５３とは異なり、先端の幅方向両端が第１実施形態のチップ部５３の先端の丸くなった幅方向両端の曲率半径よりも大きな曲率半径を有する円弧形状に構成されている。チップ部５４の幅方向の寸法Ｗ２を、第１実施形態のチップ部５３の幅方向の寸法Ｗ１よりも小さくし、かつ、大きな曲率半径を有する円弧形状の両端部５４ａ，５４ａを備えることによって、創腔（ポケットともいい、組織にできた空洞のこと）内にチップ部５４を挿入することができる。これにより、創傷を損傷させずに壊死組織や汚染物質等を擦り取ることができる角の無い形状のチップ部５４を構成している。 The tip portion 54 has a plate shape that extends from the second cylindrical portion 52D and is thinner than the second cylindrical portion 52D, and is configured to be wider toward the tip side. Further, the tip portion 54 is located on one side (second cylindrical portion 52D side) with the base end portion sandwiching the discharge path T1 for discharging the liquid, and the tip portion is separated from the other side (second cylindrical portion 52D side). The base end portion is provided with a scraping portion that is bent at a predetermined angle θ1 (130 degrees downward in FIG. 2B) toward the discharge port 52T side, which will be described later, so as to be located on the side). As described above, the tip portion 54 is provided with an inclined surface 54A that hits the liquid discharged from the discharge port 52T when the base end portion of the tip portion 54 is bent and the tip portion 54 crosses the discharge path T1. Further, unlike the chip portion 53 of the first embodiment, the tip portion 54 of the second embodiment has a radius of curvature at both ends of the tip portion 53 of the first embodiment in the width direction, which is rounded at both ends in the width direction. It is configured in an arc shape with a larger radius of curvature. The widthwise dimension W2 of the chip portion 54 is made smaller than the widthwise dimension W1 of the chip portion 53 of the first embodiment, and both ends 54a and 54a of an arc shape having a large radius of curvature are provided. The tip portion 54 can be inserted into the wound cavity (also referred to as a pocket, which is a cavity formed in a tissue). This constitutes a tip portion 54 having no corners, which can scrape off necrotic tissue, contaminants, etc. without damaging the wound.

また、第１テーパー部５２Ｃの厚み方向一側（図３（ｂ）では下側面）に、チューブ６に供給される液体を人体の組織に吐出するための吐出口５２Ｔ（図３（ａ）参照）が形成されている。この吐出口５２Ｔから液体が、先端（前方）側へ第２円筒部５２Ｄの軸心と略平行な状態で吐出されて、前記傾斜面５４Ａに当たる。この傾斜面５３Ａの傾斜角度を調整することによって、傾斜面５３Ａにおける液体の反射角度を自由に設定できる。この傾斜面５４Ａは、先端側ほど吐出口５２Ｔから遠ざかるように構成されている。 Further, on one side of the first tapered portion 52C in the thickness direction (lower side surface in FIG. 3B), a discharge port 52T for discharging the liquid supplied to the tube 6 to the tissue of the human body (see FIG. 3A). ) Is formed. The liquid is discharged from the discharge port 52T toward the tip (front) side in a state substantially parallel to the axis of the second cylindrical portion 52D, and hits the inclined surface 54A. By adjusting the inclination angle of the inclined surface 53A, the reflection angle of the liquid on the inclined surface 53A can be freely set. The inclined surface 54A is configured so as to be farther from the discharge port 52T toward the tip end side.

チップ部５４は、板状に構成され、かつ、吐出口５２Ｔから吐出される液体に当たる傾斜面５４Ｔを備えている。この吐出口５２Ｔから吐出された液体が、先端（前方）側へ第２円筒部５２Ｄの軸心と略平行な状態で吐出されて、前記傾斜面５３Ａに当たって向きが変わり、除去すべき人体の組織に当たる。また、チップ部５４は、平面視において略三角形状に構成され、前述したように先端の幅方向両端が角の取れた湾曲形状になっている。また、チップ部５４の先端部は、壊死組織や汚染物質等を擦り取り易いように、先端側ほど厚みが薄くなっている。具体的には、チップ部５４の先端部は、図３（ｂ）に示すように、上面（外面）側にテーパー面５４Ｂを備えている。 The tip portion 54 is formed in a plate shape and includes an inclined surface 54T that hits the liquid discharged from the discharge port 52T. The liquid discharged from the discharge port 52T is discharged toward the tip (front) side in a state substantially parallel to the axis of the second cylindrical portion 52D, hits the inclined surface 53A, changes its direction, and is a tissue of the human body to be removed. It hits. Further, the tip portion 54 is formed in a substantially triangular shape in a plan view, and has a curved shape in which both ends in the width direction of the tip are rounded as described above. Further, the tip portion of the tip portion 54 is thinner toward the tip side so that necrotic tissue, contaminants, and the like can be easily scraped off. Specifically, as shown in FIG. 3B, the tip portion of the tip portion 54 is provided with a tapered surface 54B on the upper surface (outer surface) side.

＜第３実施形態＞
第１実施形態のチップ５の中間部５２の形状及びチップ部５３の形状が異なる第３実施形態のチップ５が、図４（ａ），（ｂ）に示されている。 <Third Embodiment>
4 (a) and 4 (b) show the chip 5 of the third embodiment in which the shape of the intermediate portion 52 of the chip 5 of the first embodiment and the shape of the chip portion 53 are different.

図４（ａ），（ｂ）に示すチップ５は、第１実施形態のチップ部５３と同様に、ステンレス製であり、ハンドピース４の先端部に形成されている雌ネジ部（図示せず）にねじ止めされる雄ネジ部５１と、第１実施形態の中間部５２とは異なる形状の中間部５５と、第１実施形態のチップ部５３とは異なる形状のチップ部５６と、を備えている。 The tip 5 shown in FIGS. 4 (a) and 4 (b) is made of stainless steel like the tip portion 53 of the first embodiment, and has a female screw portion (not shown) formed at the tip portion of the handpiece 4. ), An intermediate portion 55 having a shape different from that of the intermediate portion 52 of the first embodiment, and a tip portion 56 having a shape different from that of the chip portion 53 of the first embodiment. ing.

中間部５５は、雄ネジ部５１の先端に雄ネジ部５１の外径よりも大きな径を有し、先端側ほど径が小さくなるテーパー形状の鍔部５５Ａと、鍔部５５Ａの先端から略同一径で前方に延びる第１円筒部５５Ｂと、第１円筒部５５Ｂの先端から先端側ほど径が小さくなる第１テーパー部５５Ｃと、その第１テーパー部５５Ｃの先端から略同一径で前方に延びるとともに長手方向略中央部が所定角度θ２（図４（ｂ）では１６５度下方へ）折れ曲がった第２円筒部５５Ｄと、を備えている。第１円筒部５５Ｂの先端部の左右両側のそれぞれには、中間部５５を２つの指で支持して創部を清浄化している最中に、中間部５５が回転しないように中間部５５を確実に支持するためのフラット面５５ｆが形成されている。尚、第１実施形態の鍔部５２Ａ及び第２実施形態の鍔部５２Ａ及び第３実施形態の鍔部５５Ａの外径寸法Ｓは、いずれも同一寸法にしているが、異なる寸法であってもよい。 The intermediate portion 55 has a diameter larger than the outer diameter of the male screw portion 51 at the tip of the male screw portion 51, and is substantially the same as the tapered flange portion 55A whose diameter becomes smaller toward the tip side from the tip of the flange portion 55A. The first cylindrical portion 55B extending forward in diameter, the first tapered portion 55C whose diameter becomes smaller toward the tip side from the tip of the first cylindrical portion 55B, and the first tapered portion 55C extending forward in substantially the same diameter from the tip of the first tapered portion 55C. A second cylindrical portion 55D having a substantially central portion in the longitudinal direction bent at a predetermined angle θ2 (165 degrees downward in FIG. 4B) is provided. On each of the left and right sides of the tip of the first cylindrical portion 55B, secure the intermediate portion 55 so that the intermediate portion 55 does not rotate while the intermediate portion 55 is supported by two fingers to clean the wound. A flat surface 55f is formed to support the surface. The outer diameter dimensions S of the flange portion 52A of the first embodiment, the flange portion 52A of the second embodiment, and the collar portion 55A of the third embodiment are the same, but may be different. Good.

チップ部５６は、第２円筒部５５Ｄの先端から延びており、該チップ部５６の長手方向に長い略楕円状（又は略長円状であってもよい）で、かつ、板厚方向のうちの一側に傾斜面を構成する湾曲形状の窪み部５６Ｈを備えた略スプーン形状に構成されている。また、窪み部５６Ｈの基端側内面に、チューブ６に供給される液体を人体の組織に吐出するための吐出口５６Ｔを備えている。この吐出口５６Ｔから吐出される液体は、チップ部５６の長手方向に真っ直ぐ吐出するように構成され、窪み部５６Ｈの先端側内面５６ａに当たる。また、チップ部５６は、先端側ほど厚みが薄くなっている。吐出口５６Ｔから吐出される液体は、先端（前方）側へチップ部５６の下面と略平行な状態で吐出されて、前記傾斜面である窪み部５６Ｈの先端側内面５６ａに当たって向きが変わり、除去すべき人体の組織に当たる。 The tip portion 56 extends from the tip of the second cylindrical portion 55D, has a substantially elliptical shape (or may have a substantially oval shape) that is long in the longitudinal direction of the tip portion 56, and is in the plate thickness direction. It is configured in a substantially spoon shape with a curved recess 56H forming an inclined surface on one side. Further, a discharge port 56T for discharging the liquid supplied to the tube 6 to the tissue of the human body is provided on the inner surface of the recessed portion 56H on the base end side. The liquid discharged from the discharge port 56T is configured to be discharged straight in the longitudinal direction of the tip portion 56, and hits the tip-side inner surface 56a of the recessed portion 56H. Further, the thickness of the tip portion 56 is thinner toward the tip side. The liquid discharged from the discharge port 56T is discharged to the tip (front) side in a state substantially parallel to the lower surface of the tip portion 56, and hits the inner surface 56a on the tip side of the recessed portion 56H, which is the inclined surface, and changes its direction to be removed. It corresponds to the tissue of the human body that should be.

上記のように、チップ部５６が略楕円状であり、しかも左右幅が第１実施形態のチップ部５３の幅方向の寸法Ｗ１及び第２実施形態のチップ部５４の幅方向の寸法Ｗ２よりも狭い幅方向の寸法Ｗ３を有しているので、複雑な創傷に対して壊死組織や汚染物質等を擦り取る際に創傷の狭い部分にも対応することができる。また、チップ部５６が、板状の一方の面（人体の組織側となる面）に形成され、かつ、長手方向に長い湾曲形状の窪み部５６Ｈを備えている。この窪み部５６Ｈは、それの最大深さＨがチップ部５６の厚みＤの半分以下に構成された略スプーン形状に構成されている。したがって、長手方向に長い窪み部５６Ｈを備えるとともに液体が長手方向に吐出されるので、擦り取った壊死組織や汚染物質等が、窪み部５６Ｈに詰まり難い。しかも、吐出口５６Ｔから吐出される液体が窪み部５６Ｈの先端側内面５６ａに当たるので、窪み部５６Ｈの先端部で擦り取られた壊死組織や汚染物質等が窪み部５６Ｈの先端側内面５６ａに付着することを防止できる。 As described above, the tip portion 56 has a substantially elliptical shape, and the left-right width is larger than the width direction dimension W1 of the chip portion 53 of the first embodiment and the width direction dimension W2 of the chip portion 54 of the second embodiment. Since it has a narrow width direction dimension W3, it can cope with a narrow portion of a wound when scraping necrotic tissue, contaminants, etc. against a complicated wound. Further, the tip portion 56 is formed on one plate-shaped surface (the surface that is on the tissue side of the human body), and is provided with a concave portion 56H having a curved shape that is long in the longitudinal direction. The recess portion 56H is formed in a substantially spoon shape in which the maximum depth H thereof is less than half the thickness D of the tip portion 56. Therefore, since the recessed portion 56H that is long in the longitudinal direction is provided and the liquid is discharged in the longitudinal direction, it is difficult for the scraped necrotic tissue, contaminants, and the like to clog the recessed portion 56H. Moreover, since the liquid discharged from the discharge port 56T hits the tip-side inner surface 56a of the recess 56H, necrotic tissue or contaminants scraped off at the tip of the recess 56H adhere to the tip-side inner surface 56a of the recess 56H. Can be prevented.

尚、本発明は、上記実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々の変更を加え得ることは勿論である。 It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

前記第１実施形態〜第３実施形態では、チップ５の全長を同一長さＬ１に設定したが、異なる長さに設定してもよい。 In the first to third embodiments, the total length of the chip 5 is set to the same length L1, but it may be set to a different length.

また、前記第１実施形態〜第３実施形態では、チップ５をハンドピース４にネジにより取り外し可能に固定したが、チップ５及びハンドピース４の一方に係止溝を形成し、この係止溝に係止解除可能に係止する係止突起を他方に備えさせた構成でもよいし、チップ５及びハンドピース４が着脱できないように両者を溶接等により連結してもよい。 Further, in the first to third embodiments, the tip 5 is detachably fixed to the handpiece 4 with a screw, but a locking groove is formed on one of the tip 5 and the handpiece 4, and the locking groove is formed. The other may be provided with a locking projection that can be unlocked, or the tip 5 and the handpiece 4 may be connected by welding or the like so that the tip 5 and the handpiece 4 cannot be attached or detached.

１…超音波デブリードマン器具、２…本体、３…フットスイッチ、４…ハンドピース、５…チップ、６…チューブ、１０…チップ、１０Ａ…底部、１０Ｂ…周壁部、５１…雄ネジ部、５２…中間部、５２Ａ…鍔部、５２Ｔ…吐出口、５２ｆ…フラット面、５３…チップ部、５３Ａ…傾斜面、５３Ｂ…テーパー面、５４…チップ部、５４Ａ…傾斜面、５４Ｂ…テーパー面、５４Ｔ…傾斜面、５４ａ…両端部、５５…中間部、５５Ａ…鍔部、５５ｆ…フラット面、５６…チップ部、５６Ｈ…窪み部、５６Ｔ…吐出口、５６ａ…先端側内面、Ｄ…厚み、Ｈ…最大深さ、Ｋ…開口、Ｓ…外径寸法、Ｔ１…吐出経路、Ｗ１，Ｗ２，Ｗ３…幅方向の寸法、θ１，θ２…所定角度 1 ... Ultrasonic debridement instrument, 2 ... Main body, 3 ... Foot switch, 4 ... Handpiece, 5 ... Tip, 6 ... Tube, 10 ... Tip, 10A ... Bottom, 10B ... Peripheral wall, 51 ... Male thread, 52 ... intermediate part, 52A ... flange part, 52T ... discharge port, 52f ... flat surface, 53 ... tip part, 53A ... inclined surface, 53B ... tapered surface, 54 ... tip part, 54A ... inclined surface, 54B ... tapered surface, 54T ... inclined surface, 54a ... both ends, 55 ... intermediate part, 55A ... flange part, 55f ... flat surface, 56 ... tip part, 56H ... recessed part, 56T ... discharge port, 56a ... tip side inner surface, D ... thickness, H ... maximum depth, K ... opening, S ... outer diameter dimension, T1 ... discharge path, W1, W2, W3 ... width direction dimension, θ1, θ2 ... predetermined angle

Claims (3)

超音波デブリードマン器具の本体から超音波振動が伝達され、前記本体から供給された液体を人体に向けて吐出するように構成された超音波デブリードマン器具に備えるチップであって、
前記チップは、前記液体を先端側に吐出する吐出口と、板状に構成されたチップ部と、を備え、該チップ部は、前記吐出口から吐出される液体に当たる傾斜面を備えていることを特徴とする超音波デブリードマン器具に備えるチップ。 A chip provided in an ultrasonic debridement device configured so that ultrasonic vibration is transmitted from the main body of the ultrasonic debridement device and the liquid supplied from the main body is discharged toward the human body.
The chip includes a discharge port for discharging the liquid to the tip side and a plate-shaped chip portion, and the chip portion includes an inclined surface that hits the liquid discharged from the discharge port. A tip for an ultrasonic debridement device that features. 前記チップ部は、平板状で、かつ、先端側ほど幅広となるように構成され、前記チップ部の傾斜面が、前記吐出口から延びる吐出経路に対して傾斜していることを特徴とする請求項１に記載の超音波デブリードマン器具に備えるチップ。 The claim is characterized in that the tip portion has a flat plate shape and is configured to be wider toward the tip end side, and the inclined surface of the tip portion is inclined with respect to a discharge path extending from the discharge port. A chip provided in the ultrasonic debridement device according to item 1. 前記チップ部は、前記傾斜面への正対視で該チップ部の長手方向に長い略長円状又は略楕円状で、かつ、板厚方向のうちの一側に前記傾斜面を構成する湾曲した窪み部を備え、該窪み部の基端側内面に前記吐出口を備え、該吐出口から吐出される液体が前記窪み部の先端側内面に当たるように該吐出口を構成していることを特徴とする請求項１に記載の超音波デブリードマン器具に備えるチップ。 The tip portion has a substantially elliptical shape or a substantially elliptical shape that is long in the longitudinal direction of the tip portion in a face-to-face view with respect to the inclined surface, and is curved so as to form the inclined surface on one side in the plate thickness direction. It is provided that the recessed portion is provided, the discharge port is provided on the inner surface on the base end side of the recessed portion, and the discharge port is configured so that the liquid discharged from the discharge port hits the inner surface on the tip end side of the recessed portion. A chip provided in the ultrasonic debridement apparatus according to claim 1.
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