WO2012063778A1 - Oscillateur ultrasonique et dispositif médical à ultrasons - Google Patents

Oscillateur ultrasonique et dispositif médical à ultrasons Download PDF

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Publication number
WO2012063778A1
WO2012063778A1 PCT/JP2011/075600 JP2011075600W WO2012063778A1 WO 2012063778 A1 WO2012063778 A1 WO 2012063778A1 JP 2011075600 W JP2011075600 W JP 2011075600W WO 2012063778 A1 WO2012063778 A1 WO 2012063778A1
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Prior art keywords
vibration
ultrasonic
ultrasonic transducer
vibrator
unit
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PCT/JP2011/075600
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English (en)
Japanese (ja)
Inventor
博文 谷口
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オリンパス株式会社
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Publication of WO2012063778A1 publication Critical patent/WO2012063778A1/fr

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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
    • A61B17/32—Surgical cutting instruments
    • A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/08—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with magnetostriction
    • 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
    • A61B2017/32007—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic with suction or vacuum means

Definitions

  • the present invention relates to an ultrasonic transducer and a medical ultrasonic device.
  • an ultrasonic vibrator using a magnetostrictive vibrator that generates an ultrasonic vibration when an AC magnetic field is applied to a magnetic material having a large magnetostrictive characteristic. It has been known. Since the vibration amplitude of the magnetostrictive vibrator is several ⁇ m to several tens of ⁇ m, a structure called a horn is joined to the magnetostrictive vibrator, and the vibration amplification is amplified to about several hundred ⁇ m through the horn. In many cases, the vibration at the vibration output unit is used. The vibration output unit and the horn may not be formed from a material having magnetostrictive characteristics.
  • Patent Document 1 includes an ultrasonic transducer that generates ultrasonic vibrations and a horn to which the ultrasonic vibrations are transmitted, and an ultrasonic wave in which tissue is crushed at the tip of the horn.
  • the ultrasonic vibrator includes a magnetostrictive element made of a cylindrical magnetostrictive material in which a bolt insertion hole is formed, a bolt inserted into the bolt insertion hole of the magnetostrictive element, and both ends of the bolt.
  • a magnetostrictive element made of a cylindrical magnetostrictive material in which a bolt insertion hole is formed, a bolt inserted into the bolt insertion hole of the magnetostrictive element, and both ends of the bolt.
  • Patent Document 1 describes examples of Ni—Cu—Co ferrite, Tb—Dy—Fe alloy, and iron-based amorphous alloy as magnetostrictive materials.
  • Patent Document 2 discloses an ultrasonic vibrator having a distal end and a proximal end, a passive element that converts electrical energy into ultrasonic vibration, and an electrode for supplying power to the passive element.
  • a horn main body that is on the tip side of the passive element and amplifies the ultrasonic vibration; a backing part that is on the base end side of the passive element and lines the passive element; and one end connected to the horn main body part And the other end connected to the backing part, and the horn body part and the backing part are connected with the passive element sandwiched between the horn body part and the backing part.
  • an ultrasonic transducer that includes a horn connecting portion, and at least one of the horn main body portion, the horn connecting portion, and the backing portion is formed of metal glass.
  • a vibration generating unit and an amplitude amplifying unit including an amplitude amplifying unit (horn) or a vibration output unit are provided as parts formed of different materials. A configuration in which these parts are assembled is known.
  • the present invention has been made in view of the above-described problems, and an ultrasonic transducer and medical ultrasonic wave in which a manufacturing process is simplified and a defect in vibration transmission efficiency is suppressed and productivity is improved.
  • the purpose is to provide equipment.
  • an ultrasonic transducer includes a vibration generating unit that generates ultrasonic vibration by application of an alternating magnetic field, and the vibration generating unit that generates the ultrasonic vibration.
  • An AC magnetic field applying unit that applies the AC magnetic field to the vibration generating unit.
  • the ultrasonic vibration is amplified by changing a size of a transmission path of the ultrasonic vibration, which is formed between the vibration generating unit and the vibration output unit.
  • a vibration amplifying unit is formed on the vibrator body.
  • an insulator part is provided that covers at least one of the vibrator main body and the alternating magnetic field application part.
  • the insulator portion is formed of a biocompatible material.
  • the vibration output part of the vibrator main body is covered with an insulator part formed of a biocompatible material.
  • the vibrator main body includes a hollow conduit having an opening in the vicinity of the vibration output portion.
  • a medical ultrasonic device includes the ultrasonic transducer according to the first to sixth aspects of the present invention.
  • the transducer main body is integrally formed of an amorphous alloy having a glass transition region having a temperature range of 20K or more and having magnetostrictive characteristics. This simplifies the process and suppresses vibration transmission efficiency defects, thereby improving productivity.
  • FIG. 6B is a sectional view taken along line AA in FIG. 6A. It is typical sectional drawing which shows schematic structure of the medical ultrasonic device of the 3rd Embodiment of this invention. It is typical sectional drawing which shows schematic structure of the medical ultrasonic device of the modification (5th modification) of the 3rd Embodiment of this invention. It is a typical left view which shows schematic structure of the medical ultrasonic device of the 4th Embodiment of this invention. It is a typical front view which shows schematic structure of the medical ultrasonic device of the 4th Embodiment of this invention.
  • FIG. 1A is a schematic left side view showing a schematic configuration of the ultrasonic transducer according to the first embodiment of the present invention.
  • FIG. 1B is a schematic front view showing a schematic configuration of the ultrasonic transducer according to the first embodiment of the present invention.
  • the ultrasonic transducer 1 of the present embodiment includes a rod-shaped transducer body 2 having a circular cross section and one end portion (hereinafter referred to as a base end portion) of the transducer body 2.
  • a coil 3 an AC magnetic field application unit that applies an AC magnetic field along the axial direction of the vibrator body 2.
  • the shape of the vibrator main body 2 is such that a solid cylindrical vibration generator 2A and an outer diameter of the vibration generator 2A are directed from one end to the other end (hereinafter sometimes referred to as a tip). Are gradually constricted, and a solid cylindrical vibration output portion 2C having a circular cross section having the same diameter as that of the tip of the vibration amplifying portion 2B is coaxial. In this way, they are sequentially adjacent to each other. That is, the vibrator body 2 is a rod-like member having a circular base end surface 2a formed on the base end side and a circular tip surface 2e having a smaller diameter than the base end surface 2a on the front end side.
  • the side surface of the vibrator body 2 has a base end side surface 2b formed from a relatively large-diameter cylindrical surface corresponding to each part of the vibration generating unit 2A, the vibration amplifying unit 2B, and the vibration output unit 2C. It is composed of a tapered surface 2c formed from a conical surface that decreases in diameter and a tip end side surface 2d formed from a relatively small-diameter cylindrical surface.
  • the vibrator body 2 having the above shape is integrally formed of an amorphous alloy having a glass transition region with a temperature range of 20K or more and having magnetostrictive characteristics. For this reason, the vibrator body 2 is formed from a continuous body of the same material. For this reason, there is no interface at the boundary between the vibration generating unit 2A, the vibration amplifying unit 2B, and the vibration output unit 2C.
  • An amorphous alloy having a glass transition region with a temperature range of 20 K or more is also called a metal glass, and a molten metal material formed from a plurality of metal elements has a critical cooling rate or more and a glass transition temperature or less. It is formed by being cooled rapidly.
  • a metallic glass is a mold material having a cavity corresponding to the product shape, and a mold material with good thermal conductivity, for example, SKD11, cemented carbide (WC), oxygen-free copper, beryllium copper, aluminum alloy (A7075). ), Zinc alloy (ZAS), carbon steel, SUS410, and the like, and a molten metal material is introduced into the cavity, and the heat is released to the mold.
  • an injection molding method As a specific molding method, an injection molding method, a centrifugal casting method, a method of hot forging a molten metal cooled to a glass transition region, or the like can be used.
  • Metallic glass can be solidified and formed without causing crystallization. Since the metallic glass has excellent formability (cavity shape transferability), it is possible to integrally provide various shapes of metallic glass on the vibrator body 2 even if the vibrator body 2 is formed in a complicated shape. is there.
  • Examples of the type of metallic glass include zirconium (Zr) based alloys, iron (Fe) based alloys, titanium (Ti) based alloys, magnesium (Mg) based alloys, and the like.
  • an appropriate material having magnetostriction characteristics as required is used.
  • a ferromagnetic material can be used because it has magnetostrictive properties.
  • the magnetostrictive characteristic is evaluated by the magnitude
  • the magnetostriction characteristic of the material of the vibrator body 2 is preferably
  • ⁇ 40 ⁇ 10 ⁇ 6 a member having the following composition ratio (subscript represents atomic%) is exemplified in Japanese Patent No. 3756336.
  • Such tensile strength is significantly higher than that of a titanium alloy known as a high-strength alloy, for example, a tensile strength of 980 MPa of a 64 titanium alloy.
  • a tensile strength of 980 MPa of a 64 titanium alloy is suitable as a material for the vibrator body 2 of the present embodiment.
  • the coil 3 is disposed on the outer peripheral side of the base end side surface 2b of the vibration generating unit 2A.
  • the vibration generating unit 2A is a part that generates ultrasonic vibration according to the frequency of the AC magnetic field by applying an AC magnetic field in which the direction of the magnetic field is changed from the coil 3 at a frequency in the ultrasonic region.
  • the vibration amplifying part 2B is integrally formed at the end opposite to the base end face 2a of the vibration generating part 2A. Since the vibration amplification unit 2B has a shape whose outer diameter is reduced toward the tip side, the transmission path of the ultrasonic vibration generated in the vibration generation unit 2A is reduced toward the tip side in the axial direction. . Therefore, the vibration amplifying unit 2B forms a structure for amplifying the ultrasonic vibration by changing the size of the transmission path of the ultrasonic vibration between the vibration generating unit 2A and the vibration output unit 2C.
  • the vibration output unit 2C is a part that transmits the ultrasonic vibration generated by the vibration generation unit 2A and amplified by the vibration amplification unit 2B to the outside.
  • An appropriate shape can be used for the vibration output portion 2C depending on the application.
  • the vibration output can be transmitted to the body to be excited via at least one of the base end surface 2a and the distal end side surface 2d. Since the vibration output is increased at the vibration antinode, the shape of the vibration output portion 2C is set so that the vibration antinode is formed at the site used for vibration transmission.
  • the tip surface 2e is mainly used for vibration output
  • the length of the vibration output portion 2C is set so that a vibration antinode is formed on the tip surface 2e.
  • the tip side surface 2d is mainly used for vibration output
  • the length of the tip side surface 2d is set so that a sufficient number of vibration antinodes are formed in the portion in contact with the body to be excited. Is done.
  • the coil 3 is formed of a cylindrical coil wound around the base end side surface 2b in an intermediate portion in the axial direction of the base end side surface 2b.
  • the coil 3 is provided so as to be connectable to an AC power source (not shown).
  • the frequency of the alternating magnetic field applied to the coil 3 is appropriately set according to the application of the ultrasonic transducer 1 as long as it is in the ultrasonic frequency region.
  • FIG. 1B the coil 3 is drawn so as to be in close contact with the base end side surface 2b.
  • the coil 3 should just be provided with the structure which can apply an alternating current magnetic field inside the vibration generation part 2A.
  • FIG. 1B schematically shows an example in which the number of turns of the coil 3 is about 3.5.
  • the number of turns of the coil 3 and the arrangement position in the axial direction are appropriately set in consideration of the magnitude of the magnetic field to be applied, the application range of the magnetic field, and the like.
  • an alternating current whose frequency is appropriately set is passed through the coil 3 by an alternating current power source (not shown)
  • an alternating magnetic field is generated by the coil 3.
  • an alternating magnetic field in which the magnetic field vector vibrates in the axial direction along the central axis direction of the coil 3 is generated inside the coil 3 (see the arrow in FIG. 1B).
  • the vibration generating unit 2A is magnetized by an alternating magnetic field, and magnetostriction is generated in each magnetic domain of the vibration generating unit 2A according to the magnetic field vector of the alternating magnetic field.
  • the magnetostriction forms ultrasonic vibration that advances along the axial direction in synchronization with the frequency of the alternating magnetic field. For this reason, the ultrasonic vibration generated in the vibration generating unit 2A propagates to the vibration amplifying unit 2B along the axial direction. At this time, since no interface or gap is formed between the vibration generating unit 2A and the vibration amplifying unit 2B, the ultrasonic vibration propagates efficiently.
  • the ultrasonic vibration propagated to the vibration amplification unit 2B propagates while the amplitude is amplified toward the distal end side because the vibration amplification unit 2B has a diameter reduced toward the distal end side.
  • the ultrasonic vibration reaches the tip of the vibration amplification unit 2B, it propagates to the vibration output unit 2C.
  • the ultrasonic vibration propagates efficiently.
  • the ultrasonic vibration propagated to the vibration output unit 2C is internally reflected by the tip surface 2e and reciprocates in the vibration output unit 2C, thereby forming a standing wave in the vibration output unit 2C.
  • the vibration output unit 2C comes into contact with the shaker, ultrasonic vibration propagates from the contact portion to the shaker.
  • the ultrasonic transducer 1 is used as an ultrasonic treatment instrument that is a medical ultrasonic device, the ultrasonic transducer 1 is applied to an affected part or the like in which the distal end surface 2e or the distal end side surface 2d is a vibrating body. In contact, the tissue or calculus of the affected area is crushed or cut.
  • the ultrasonic transducer 1 when used as an ultrasonic probe that is a medical ultrasonic device, the ultrasonic transducer 1 comes into contact with a subject that is a vibrating body at the distal end surface 2e of the vibration output unit 2C. Thus, it is used as a vibration source for propagating ultrasonic vibrations within a subject.
  • the vibrator main body 2 is integrally formed of metal glass, a conventional ultrasonic vibration in which a vibration generating unit, a vibration amplifying unit, a vibration output unit, and the like are configured by separate members is assembled.
  • the manufacturing process is simplified compared to the child.
  • the vibrator body 2 formed integrally has no interface or gap in the vibration propagation path, so that vibration can be transmitted efficiently. For this reason, there is little energy loss and it can perform favorable excitation. Accordingly, vibration efficiency and vibration waveform defects in the manufacturing process can be suppressed, and productivity is improved.
  • the vibrator body 2 is integrally formed of metal glass, the number of parts is reduced as compared with the case where the vibration generating unit, the vibration amplifying unit, the vibration output unit, etc. are configured by separate members. A joining component and a joining member for assembling the generation unit, the vibration amplification unit, the vibration output unit, and the like are not necessary. For this reason, cost reduction and size reduction can be achieved. Further, since the metallic glass has a markedly higher tensile strength than the crystalline alloy, the durability of the vibration output portion 2C and the vibration amplification portion 2B is improved.
  • Such an ultrasonic transducer 1 can be used as various ultrasonic vibration devices.
  • the ultrasonic transducer 1 is easy to miniaturize and has high durability, it is suitably used as a medical ultrasonic device used in a living body.
  • the vibrator body 2 is integrated, it is possible to suppress wear at the joint between members or scattering of wear powder due to ultrasonic vibration in the ultrasonic vibrator 1.
  • the ultrasonic transducer 1 is particularly preferably used as a medical ultrasonic device used in a living body.
  • FIG. 2A is a schematic left side view illustrating the configuration of the main part of the ultrasonic transducer according to the first modification of the first embodiment of the present invention.
  • FIG. 2B is a schematic front view showing the configuration of the main part of the ultrasonic transducer according to the first modification of the first embodiment of the present invention.
  • the ultrasonic transducer 11 of this modification includes a transducer body 12 instead of the transducer body 2 of the first embodiment.
  • the vibration output unit 2C in the vibrator body 2 of the first embodiment is changed to a vibration output unit 12C having a different cross-sectional shape.
  • the cross section of the vibration output part 12C is formed in an elliptical shape whose major axis is equal to the outer diameter of the side face 2d of the tip part of the vibration output part 2C from the tip side to the vicinity of the vibration amplification part 2B. For this reason, an elliptical distal end surface 12e is formed at the distal end of the vibration output portion 12C instead of the base end surface 2a of the vibration output portion 2C, and an elliptical columnar distal end portion is substituted for the distal end side surface 2d of the vibration output portion 2C. A side surface 12d is formed.
  • the portion near the vibration amplification unit 2B of the vibration output unit 12C is smoothly connected from the elliptical cross section of the distal end side surface 12d to the circular cross section at the distal end of the vibration amplification unit 2B from the distal end side toward the proximal end side.
  • a proximal end side connection portion 12f formed from a variable cross section is formed.
  • the ultrasonic vibrator 11 having the above-described configuration is manufactured by integrally forming the vibrator main body 12 with the same metallic glass as the ultrasonic vibrator 1 using a mold having a cavity corresponding to the outer shape thereof. Thereafter, the coil 3 is manufactured by being assembled.
  • the vibration output portion 12C is formed in a flat bar shape having an elliptical cross section. Therefore, a blade-like portion having a small curvature radius and a flat portion having a large curvature radius are formed on the side surface 12d of the distal end portion of the vibration output portion 12C. As a result, the ultrasonic transducer 11 is properly used in such a manner that a portion having a different radius of curvature of the distal end side surface 12d is brought into contact with the body to be excited in accordance with the application of vibration.
  • the ultrasonic transducer 11 when used as a medical ultrasonic treatment instrument, when cutting an affected part or the like, the bladed part is brought into contact with the affected part or the like, and vibration is output to crush the affected part or the like. In some cases, the flat part is brought into contact with the affected part and the vibration is output.
  • FIG. 3A is a schematic left side view showing the configuration of the main part of the ultrasonic transducer of the second modification of the first embodiment of the present invention.
  • FIG. 3B is a schematic front view showing the configuration of the main part of the ultrasonic transducer of the second modification of the first embodiment of the present invention.
  • the ultrasonic transducer 21 of this modification includes a transducer body 22 instead of the transducer body 2 of the first embodiment.
  • the vibrator body 22 includes a vibration output unit 22C having a shape in which a plate-like portion 22f is added to the tip of the vibration output unit 2C provided in the vibrator body 2 of the first embodiment.
  • a description will be given centering on differences from the first embodiment.
  • the plate-like portion 22f of the vibration output portion 22C is a disc-like portion having an outer diameter larger than the outer diameter of the distal end side surface 2d and smaller than the outer diameter of the proximal end side surface 2b.
  • the plate-like portion 22f is formed coaxially with the tip end side surface 2d.
  • the vibration output portion 22C includes a circular distal end surface 22e having the same diameter as the outer diameter of the plate-like portion 22f, instead of the base end surface 2a of the vibration output portion 2C of the first embodiment.
  • the ultrasonic vibrator 21 having the above-described configuration is manufactured by integrally forming the vibrator main body 22 with the same metallic glass as the ultrasonic vibrator 1 using a mold having a cavity corresponding to the outer shape thereof. Thereafter, the coil 3 is manufactured by being assembled.
  • a distal end surface 22e having an outer diameter larger than the distal end side surface 2d is formed at the distal end of the vibration output portion 12C. Therefore, the ultrasonic transducer 21 can output a vibration to a vibration body in a wider range than the outer diameter of the distal end side surface 2d through the distal end surface 22e. For this reason, for example, when the ultrasonic transducer 21 is used as a medical ultrasonic treatment instrument, a large affected part or the like can be efficiently crushed as compared with the outer diameter of the distal end side surface 2d.
  • FIG. 4 is a schematic front view showing the configuration of the main part of the ultrasonic transducer of the third modification of the first embodiment of the present invention.
  • the ultrasonic transducer 31 of this modification includes a transducer main body 32 instead of the transducer main body 2 of the first embodiment.
  • the vibrator main body 32 includes a vibration output section 32C having a shape in which the vibration output section 2C in the vibrator main body 2 of the first embodiment is bent in a V shape.
  • a description will be given centering on differences from the first embodiment.
  • a cylindrical base end side shaft portion 32a and a bent shaft portion 32b having the same outer diameter as the vibration output portion 2C of the first embodiment extend in this order from the tip of the vibration amplification portion 2B. It is configured.
  • the proximal end side shaft portion 32a is a portion extending coaxially with the vibration amplifying portion 2B and the vibration generating portion 2A.
  • the bending shaft portion 32b is a rod-shaped portion that extends from the distal end side of the proximal end side shaft portion 32a toward the distal end side while being inclined at an acute angle in the extending direction of the proximal end side shaft portion 32a.
  • a distal end side surface 32d formed of a bent cylindrical surface is provided on the outer peripheral portion of the proximal end side shaft portion 32a and the bent shaft portion 32b.
  • a distal end surface 32e formed from a circular plane orthogonal to the extending direction of the bent shaft portion 32b is provided at the distal end of the bent shaft portion 32b.
  • the ultrasonic transducer 31 having the above-described configuration is manufactured by integrally forming the transducer main body 32 with the same metallic glass as the ultrasonic transducer 1 using a mold having a cavity corresponding to the outer shape thereof. Thereafter, the coil 3 is manufactured by being assembled.
  • the bent shaft portion 32b extends obliquely from the distal end of the proximal end side shaft portion 32a. For this reason, when the tip end side surface 32d of the bent shaft portion 32b is used for vibration output, the direction in which the bent shaft portion 32b extends and the directions of the central axes of the vibration generating portion 2A and the vibration amplifying portion 2B are different. Therefore, depending on the shape of the vibrating body, the tip side surface 32d of the bending shaft portion 32b can be easily brought into contact with the vibrating body, and the operability is improved.
  • FIG. 4 illustrates an example in which the proximal end side shaft portion 32a and the bent shaft portion 32b are bent in a V shape, but the space between the proximal end side shaft portion 32a and the bent shaft portion 32b is a circle. You may form in the shape curved by the arc.
  • FIG. 5A is a schematic left side view showing a schematic configuration of an ultrasonic transducer according to a fourth modification of the first embodiment of the present invention.
  • FIG. 5B is a schematic front view showing a schematic configuration of an ultrasonic transducer according to a fourth modification of the first embodiment of the present invention.
  • the ultrasonic transducer 41 of the present modification includes a transducer main body 42 instead of the transducer main body 2 of the first embodiment.
  • the vibration output unit 2C of the vibrator main body 2 of the first embodiment is removed, and a vibration output unit that makes a vibration output by abutting the tip of the vibration amplifying unit 2B with the excited body.
  • a vibration output surface 42e formed from a circular plane is provided.
  • the ultrasonic transducer 41 having the above-described configuration is manufactured by integrally forming the transducer main body 42 with the same metallic glass as the ultrasonic transducer 1 using a mold having a cavity corresponding to the outer shape thereof. Thereafter, the coil 3 is manufactured by being assembled.
  • the ultrasonic vibration amplified by the vibration amplifying unit 2B can be transmitted from the vibration output surface 42e to the excited body. For this reason, even when the linear or belt-like vibration output region is not required due to the distal end side surface 2d or the like, the base end surface 2a of the ultrasonic transducer 1 is provided even if the device configuration is smaller than the ultrasonic transducer 1. It is possible to output the same vibration as that used.
  • FIG. 6A is a schematic left side view showing a schematic configuration of an ultrasonic transducer according to a second embodiment of the present invention.
  • 6B is a cross-sectional view taken along the line AA in FIG. 6A.
  • the ultrasonic transducer 51 of the present embodiment includes a transducer main body 52 instead of the transducer main body 2 of the first embodiment.
  • the vibrator body 52 has the same outer shape as that of the vibrator body 2 of the first embodiment.
  • the vibrator main body 52 is a cylindrical member through which a hollow pipe 52 f provided coaxially with the outer shape of the vibrator main body 52 passes.
  • the transducer main body 52 includes a vibration generation unit 52A, a vibration amplification unit 52B, and a vibration output unit 52C corresponding to the vibration generation unit 2A, the vibration amplification unit 2B, and the vibration output unit 2C of the ultrasonic transducer 1.
  • a description will be given centering on differences from the first embodiment.
  • the cross-sectional shape of the hollow duct 52f is not particularly limited.
  • the size of the cross section of the hollow duct 52f may vary.
  • the cross section of the hollow duct 52 f is a circle in which a circular cross section having a constant diameter smaller than the outer diameter of the tip side surface 2 d is straightly extended along the central axis of the vibrator body 52. It consists of holes. Therefore, an annular distal end surface 52e and a proximal end surface 52a are formed at the distal end and the proximal end of the vibrator main body 52 so as to surround the opening of the hollow duct 52f.
  • the vibrator main body 52 is integrally formed of the same metallic glass as the ultrasonic vibrator 1 using a mold having cavities corresponding to the outer shape and the inner shape.
  • the coil 3 is manufactured by assembling.
  • the shape of the hollow duct 52f is formed, for example, by providing a cylindrical core in a mold.
  • an ultrasonic vibration is generated in the vibration generating unit 52A when an alternating magnetic field is applied to the coil 3.
  • the ultrasonic vibration is amplified by the vibration amplifying unit 52B and output from at least one of the front end surface 52e and the front end side surface 2d of the vibration output unit 52C. Then, the ultrasonic vibration is transmitted to the vibrating body that is in contact with the distal end surface 52e and the distal end side surface 2d of the vibration output unit 52C.
  • the transducer main body 52 has the hollow pipe line 52f, the amount of medium that propagates ultrasonic vibrations is smaller than that of the transducer main body 2. Therefore, the vibration output of the vibration output unit 52C changes.
  • the amplitude of the AC magnetic field may be appropriately adjusted based on the size of the hollow pipe 52f.
  • the ultrasonic vibrator 51 has the hollow pipe 52f, a fluid containing a fluid or a solid can be circulated through the hollow pipe 52f while the vibration of the ultrasonic vibration is output.
  • the hollow conduit 52f can be used as a suction hole. That is, by connecting a tube connected to an aspirator (not shown) to the hollow conduit 52f on the base end face 52a side, vibration is output at the tip of the vibration output section 52C, resulting in crushing or cutting. The tissue or body fluid of the affected area can be sucked out to the proximal end side through the hollow duct 52f and removed from the vicinity of the affected area.
  • the hollow conduit 52f can be used as a fluid injection hole into which a fluid such as a cleaning agent flows. That is, when a tube connected to a syringe (not shown) is connected to the hollow conduit 52f on the base end surface 52a side, a cleaning agent or the like is appropriately injected from the opening of the hollow conduit 52f on the distal end surface 52e.
  • the processing powder and the like formed by ultrasonic vibration can be washed away from the processing surface.
  • FIG. 7 is typical sectional drawing which shows schematic structure of the medical ultrasonic device of the 3rd Embodiment of this invention.
  • the medical ultrasonic device 60 of the present embodiment includes the ultrasonic transducer 61 of the present embodiment and a controller 66 that controls the operation of the ultrasonic transducer 61.
  • the ultrasonic transducer 61 includes the transducer main body 52 and the coil 3 similar to the ultrasonic transducer 51 of the second embodiment, and further includes a cover 64.
  • a tube 67 is inserted into the hollow conduit 52f of the vibrator main body 52 from the base end face 52a side.
  • the tube 67 is connected to an aspirator (not shown) that forms part of the medical ultrasonic device 60.
  • the tube 67 has a configuration capable of sucking the fluid or the like inside the hollow duct 52 f to the outside of the ultrasonic transducer 61.
  • the cover 64 is a cylindrical member that covers the entirety of the vibration generating unit 52A and the vibration amplifying unit 52B and part of the base end side of the vibration output unit 52C.
  • the operator can hold and hold the ultrasonic transducer 61 without touching the transducer main body 52 or the coil 3.
  • the cover 64 has a cylindrical cover side portion 64b having an inner diameter larger than the outer diameter of the coil 3.
  • a cover bottom 64a is formed at one end of the cover side 64b, a tapered taper 64c having a diameter reduced from the cover side 64b is provided at the other end, and vibration is generated at the tip of the taper 64c.
  • a tip opening 64d having a slightly larger inner diameter than the output portion 52C is provided, and the cover 64 is formed in a bottomed cylindrical shape.
  • a through hole 64f having an inner diameter equal to or larger than the inner diameter of the hollow duct 52f and penetrating the tube 67 is formed at the center of the cover bottom 64a.
  • FIG. 7 is a schematic diagram and is not particularly illustrated, the end of the coil 3 housed inside and the controller 66 are electrically connected to the cover side 64b or the cover bottom 64a of the cover 64.
  • the wiring structure for this is suitably provided. Examples of such a wiring structure include, for example, a wiring lead-out hole for drawing out the end of the coil 3 to the outside, a connector electrically connected to the end of the coil 3, and the like.
  • the material of the cover 64 is not particularly limited.
  • the material of the cover 64 for example, polycarbonate having electrical insulation is used.
  • the cover 64 of the present embodiment constitutes an insulator part that covers the vibrator body 52 and the application part of the alternating magnetic field.
  • the cover 64 having such a configuration is such that a part of the front end side of the vibration output part 52C extends to the outside from the front end opening part 64d, and the vibration amplification part 52B and the vibration generation part 52A are accommodated inside.
  • the end surface 52a and the cover bottom portion 64a are assembled by being joined by the joining portion 65.
  • an appropriate joining means such as adhesion or screwing is used.
  • the base end face 52a and the cover bottom portion 64a are bonded by an adhesive having electrical insulation. For this reason, the vibrator main body 52 and the cover 64 are electrically insulated.
  • the tube 67 is inserted into the ultrasonic transducer 61 through the through hole 64f and connected to the hollow conduit 52f. With such a configuration, the relative positional relationship between the cover 64 and the vibrator main body 52 is fixed.
  • the controller 66 supplies an alternating current corresponding to the frequency of the ultrasonic vibration to the coil 3 in order to output the ultrasonic vibration by the ultrasonic vibrator 61 and drives a suction device (not shown) to form a hollow pipe line. It is a member which performs control which performs suction from 52f. Supply of current from the controller 66 is performed through a wiring 66 a electrically connected to the coil 3 via a wiring structure (not shown) provided in the cover 64.
  • the ultrasonic transducer 61 having such a configuration, an alternating current is supplied from the controller 66 to the coil 3, so that the vibration output unit 52 ⁇ / b> C is similar to the ultrasonic transducer 51 of the second embodiment. Vibration can be output.
  • the ultrasonic transducer 61 since the ultrasonic transducer 61 has a configuration in which the outer peripheral portion is covered with the cover 64, the ultrasonic transducer 61 outputs vibrations while the cover 64 is held by a hand or held by a robot hand or a support member. Can do.
  • the cover 64 of the ultrasonic transducer 61 is gripped by hand, or held by a robot hand or a support member,
  • the vibration output part 52C is brought into contact with the affected part, and the tissue or the like of the affected part can be crushed or cut.
  • the controller 66 drives an aspirator (not shown) to suck a crushed piece, a cut piece, a body fluid and the like of the affected tissue from the opening of the hollow duct 52f on the distal end surface 52e side. And can be removed.
  • FIG. 8 is a schematic cross-sectional view showing a schematic configuration of a medical ultrasonic device of a fifth modified example.
  • the medical ultrasonic device 70 of the present modified example is replaced with the ultrasonic transducer 61 of the medical ultrasonic device 60 of the third embodiment, and the ultrasonic transducer of the present modified example.
  • 71 is provided.
  • the ultrasonic transducer 71 is provided with an insulator 74 on the outer peripheral surface of the vibration output portion 52 ⁇ / b> C extending from the cover 64 in the ultrasonic transducer 61 of the third embodiment.
  • the insulator portion 74 is a member provided to prevent a current induced in the vibrator main body 52 from passing through the excited body.
  • the insulator portion 74 is provided on the distal end surface 52e and the distal end portion side surface 2d extending from the cover 64.
  • the material of the insulator part 74 is not particularly limited as long as it has a necessary electrical insulation property.
  • organic materials such as cotton, paper, rubber, synthetic resin such as polyester and epoxy resin can be suitably used.
  • inorganic materials such as asbestos and glass fiber can also be suitably used.
  • a hard insulator is formed in close contact with the front end surface 52e and the front end portion side surface 2d.
  • the insulator 74 is preferably made of a material having biocompatibility.
  • the biocompatibility means a characteristic capable of suppressing the occurrence of allergic reaction without showing cytotoxicity (cell death or proliferation inhibition) even when in contact with a living body.
  • insulating materials that are biocompatible include oxide ceramics such as aluminum oxide and titanium oxide, nitride ceramics such as aluminum nitride and titanium nitride, and carbide ceramics such as aluminum carbide and titanium carbide. Etc.
  • the insulator 74 may be formed on the front end surface 52e and the front end side surface 2d by an appropriate surface treatment.
  • the insulator 74 may be formed in a shape that covers the distal end surface 52e and the distal end side surface 2d, and then joined to the surfaces of the distal end surface 52e and the distal end side surface 2d via an adhesive or the like.
  • the insulator portion 74 of the present modification is formed with a titanium nitride film having high biocompatibility and suitable for use in medical equipment by ion plating on the surface of the distal end surface 52e and the distal end portion side surface 2d. The structure is provided.
  • the insulator 74 is provided on the surfaces of the tip surface 52e from which vibration is output and the tip portion side surface 2d extending from the cover 64. Therefore, it is possible to prevent the current generated in the vibrator main body 52 when the vibration is output from being supplied to the excited body.
  • the living tissue may be cauterized in an area away from the contact portion with the vibration output unit 52C due to Joule heat depending on the magnitude of the energization amount.
  • the ultrasonic transducer 71 having the above configuration is suitably used for the medical ultrasonic device 70 in which the body to be excited is a living body.
  • a titanium nitride film is used for the insulator 74. Therefore, even when the material of the vibrator main body 52 includes an element harmful to the living body, it is possible to reliably prevent the living body that is the vibrating body from being poisoned. In addition, since titanium nitride has high biocompatibility, for example, it does not exhibit cytotoxicity and can suppress the occurrence of allergic reactions and the like.
  • FIG. 9A is a schematic left side view illustrating a schematic configuration of a medical ultrasonic instrument according to a fourth embodiment of the present invention.
  • FIG. 9B is a schematic front view showing a schematic configuration of the medical ultrasonic apparatus according to the fourth embodiment of the present invention.
  • the medical ultrasonic device 80 of the present embodiment is an insulator so as to cover the vibration output surface 42e of the ultrasonic transducer 41 of the fourth modified example of the first embodiment.
  • the insulator 84 can be made of the same material and bonding method as the insulator 74 of the fourth modification of the first embodiment. In this embodiment, titanium nitride is used.
  • the controller 86 is a member obtained by deleting the function of controlling the suction device from the controller 66.
  • the vibration output surface 42e which is a vibration output unit, is covered with the insulator 84. Therefore, according to the medical ultrasonic device 80, as in the third embodiment, energization to a living tissue that is a vibration body is prevented.
  • biocompatible titanium oxide is used as the insulator portion 84. Therefore, in the medical ultrasonic instrument 80, adverse effects due to contact with living tissue are avoided. Therefore, the medical ultrasonic device 80 is preferably used as a medical ultrasonic device in which the body to be excited is a living body.
  • the cross-sectional shape along the axial direction of the vibration output unit is constant.
  • the size and shape of the cross-sectional shape may be changed.
  • the cross-sectional area as it goes toward the tip end side may be formed narrower.
  • the shape of the front view of the tip may be formed in a circular shape.
  • the shape of the front end portion in front view may be formed in an arc shape.
  • the medical treatment tool to which ultrasonic vibration is applied should just be formed in the shape which can be shape
  • the hollow conduit 52f is configured to open to the tip side of the vibration output portion 52C.
  • the hollow duct 52f may have a configuration that opens to the distal end side surface 2d (the distal end side surface 2d extending from the cover 64 when the cover 64 is provided).
  • the cover 64 includes a configuration that covers the coil 3, the vibration generating unit 52A, the vibration amplifying unit 52B, and the vibration output unit 52C.
  • the cover 64 may be configured to appropriately cover the outer peripheral portion of the vibrator main body 52.
  • the cover 64 may be configured to cover only a portion around which the coil 3 is wound.
  • the cover 64 and the vibrator main body 52 are joined by the joining portion 65 such as an adhesive.
  • the joining portion 65 may be joined in a flexible structure so that the vibration of the vibrator main body 52 is not easily transmitted to the cover 64 via an elastic material, a vibration absorbing material, or the like.
  • the cover 64 is gripped by hand, vibrations are not easily transmitted, and thus the cover 64 is configured to be easily gripped by hand.
  • the vibration of the vibrator main body 52 is difficult to be transmitted to the cover 64, the generation of noise is suppressed. Furthermore, vibration can be efficiently output to the vibration output unit 52C.
  • the cover 64 is joined to the vibrator main body 52 on the cover bottom 64a side.
  • the tip opening 64d of the cover 64 may be fixed to the tip side surface 2d.
  • the tip opening 64d is preferably fixed to the portion of the tip side surface 2d that becomes a node of ultrasonic vibration.
  • the insulator portions 74 and 84 are made of a material that is an insulator and has biocompatibility.
  • the vibration output unit does not need to have electrical insulation even if the body to be excited is a living body, a configuration in which a conductor material having biocompatibility is provided instead of the insulators 74 and 84 is provided. But you can.
  • the ultrasonic transducers 61, 71, 81 are used for the medical ultrasonic devices 60, 70, 80.
  • all of the ultrasonic transducers described in the above embodiments and modifications can be used as an ultrasonic device other than a medical ultrasonic device.
  • Examples of such ultrasonic equipment include an ultrasonic cleaning machine, an underwater acoustic detector, a wire bonding machine, and the like.
  • ultrasonic transducers described above may be used as ultrasonic transducers for medical ultrasonic devices or ultrasonic devices.
  • the manufacturing process is simplified, and the defect in vibration transmission efficiency is suppressed, thereby improving productivity.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Biomedical Technology (AREA)
  • Dentistry (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Surgical Instruments (AREA)

Abstract

La présente invention se rapporte à un oscillateur ultrasonique (1) pourvu d'un corps (2) d'oscillateur et d'une bobine (3). Le corps (2) d'oscillateur comporte une section de génération d'oscillation (2A), qui génère des oscillations ultrasoniques lors de l'application d'un champ magnétique alternatif, et une section de sortie d'oscillation (2C), qui sort les oscillations ultrasoniques générées par la section de génération d'oscillation (2A). Le corps (2) d'oscillateur se présente sous la forme d'une unité unique constituée d'un alliage amorphe qui a des propriétés magnétostrictives et a une région de transition vitreuse qui existe sur une plage de températures d'au moins 20°K. La bobine (3) applique un champ magnétique alternatif à la section de génération d'oscillation (2A) du corps (2) d'oscillateur.
PCT/JP2011/075600 2010-11-09 2011-11-07 Oscillateur ultrasonique et dispositif médical à ultrasons WO2012063778A1 (fr)

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JP2010-250683 2010-11-09
JP2010250683A JP5749472B2 (ja) 2010-11-09 2010-11-09 超音波振動子および医療用超音波機器

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019069050A3 (fr) * 2017-10-05 2019-05-23 Oxford University Innovation Limited Dispositif magnéto-acoustique
CN114040719A (zh) * 2019-04-17 2022-02-11 柯惠有限合伙公司 用于超声手术器械的超声波导和刀片以及其制造方法

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
KR101733851B1 (ko) * 2014-12-29 2017-05-24 박정경 비정질 소재를 이용한 공명 초음파 수처리 장치
EP3406216A4 (fr) 2016-01-20 2019-10-09 Olympus Corporation Instrument chirurgical
ES2933557T3 (es) * 2016-03-03 2023-02-10 Alma Lasers Ltd Sonotrodo

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JPS61191350A (ja) * 1985-02-21 1986-08-26 住友ベークライト株式会社 外科手術用具
JPH02169072A (ja) * 1988-12-21 1990-06-29 Sumitomo Light Metal Ind Ltd 加振装置
JPH0549649A (ja) * 1991-08-28 1993-03-02 Olympus Optical Co Ltd 超音波治療装置
JP3756336B2 (ja) * 1999-01-27 2006-03-15 独立行政法人科学技術振興機構 高磁歪非晶質合金

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
JPS61191350A (ja) * 1985-02-21 1986-08-26 住友ベークライト株式会社 外科手術用具
JPH02169072A (ja) * 1988-12-21 1990-06-29 Sumitomo Light Metal Ind Ltd 加振装置
JPH0549649A (ja) * 1991-08-28 1993-03-02 Olympus Optical Co Ltd 超音波治療装置
JP3756336B2 (ja) * 1999-01-27 2006-03-15 独立行政法人科学技術振興機構 高磁歪非晶質合金

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019069050A3 (fr) * 2017-10-05 2019-05-23 Oxford University Innovation Limited Dispositif magnéto-acoustique
CN114040719A (zh) * 2019-04-17 2022-02-11 柯惠有限合伙公司 用于超声手术器械的超声波导和刀片以及其制造方法
EP3955834A4 (fr) * 2019-04-17 2023-01-18 Covidien LP Guide d'onde ultrasonore et lame pour instruments chirurgicaux ultrasonores et son procédé de fabrication

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JP5749472B2 (ja) 2015-07-15

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