JP2652209B2 - Ultrasonic generation transmission device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an ultrasonic wave suitable for use in an ultrasonic surgical suction device or the like that applies ultrasonic waves to an affected part of a living body to emulsify, subdivide and suction. It relates to a generation transmission device.

(Prior Art) A conventional ultrasonic surgical suction apparatus uses a magnetostrictive vibrator as an ultrasonic wave source, and connects a titanium pipe for transmitting vibration to the magnetostrictive vibrator.

FIG. 8 shows the structure of the tip portion of a conventional ultrasonic surgical suction device, and 1 is a titanium pipe for vibration transmission having a single-tube structure (a vibrating tip which is brought into contact with a diseased part of a living body to be destroyed by ultrasonic waves). Reference numeral 2 denotes a chip cover. In this case, a physiological saline solution is sent from the water injection pipe 3 provided on the tip cover 2 to the affected part of the living body through the gap between the titanium pipe 1 and the tip cover 2, and is emulsified and fragmented by the axial vibration of the single pipe titanium pipe 1. The tissue or the like of the affected part is sucked and removed through a through hole inside the titanium pipe 1.

(Problems to be Solved by the Invention) When a magnetostrictive vibrator is used as the above-mentioned ultrasonic wave generating source, it is convenient to obtain a large-amplitude ultrasonic vibration, but cooling of the coil of the magnetostrictive vibrator is advantageous. For this purpose, it is necessary to adopt a water-cooling structure, and there is a problem that the structure becomes complicated and expensive. In addition, the vibrating tip for destroying the tissue in the living body is a single tube, and ultrasonic vibration of a large amplitude is necessary for tissue destruction, and there is a disadvantage that the efficiency of tissue destruction is poor.

On the other hand, an ultrasonic therapeutic device for destroying a calculus such as a kidney using an electrostrictive vibrator using a piezoelectric element as an ultrasonic generating source has been proposed by the present applicant in Japanese Utility Model Application Laid-Open No. 61-205519. The electrostrictive vibrator using this piezoelectric element has a simple structure and does not require a special cooling structure. However, Japanese Utility Model Laid-Open No. 61-20551 has a structure intended for destruction of calculi, and ultrasonic generation and transmission of an ultrasonic surgical suction device for emulsifying, subdividing, and aspirating and removing diseased parts such as tumors in a living body. In order to use it as a means, further contrivance is required.

The present invention has been made in view of the above points, and has added an improvement to the structure of a vibration transmitting portion that transmits an ultrasonic vibration generated by a bolted vibrator using a piezoelectric element to an affected area such as a tumor in a living body.
It is an object of the present invention to propose an ultrasonic generation and transmission device having a structure suitable for an ultrasonic surgical suction device or the like for effectively emulsifying and subdividing an affected part such as a tumor in a living body.

(Means for Solving the Problems) The ultrasonic generating and transmitting apparatus of the present invention tightens a piezoelectric element between a horn base and a back block with a bolt shaft, inserts a vibration-transmitting thin tube or thin wire, and A core tube for vibration transmission in which a thin wire is bound and integrated at a distal end portion is fixed to a tip portion of the core tube horn, and the core tube horn is connected to a center portion of the horn base, and a vibration transmission core is connected to an outer peripheral portion of the horn base. An outer tube horn serving as an outer shell is connected, and the vibration-transmitting thin tube or thin line is wavy and bent to contact the inner wall of the vibration-transmitting core tube, and the tip of the vibration-transmitting thin tube or thin line is Protruding from the vibration transmission core tube and proximate to the tip of the outer tube horn, the core tube horn has a through hole serving as a water injection passage communicating with the inside of the vibration transmission core tube; Horn and said The configuration in which the space between the core tube for vibration transmission and the core tube horn serves as a water absorption path solves the problems of the prior art.

In the above-mentioned ultrasonic generating and transmitting apparatus, the horn base and the bolt shaft may have a through hole communicating with the through hole of the core tube horn.

Further, it is preferable that the horn base is provided with a water suction passage communicating with a space between the outer tube horn, the vibration transmission core tube, and the core tube horn.

A short water injection tube may be inserted into the end portion of the vibration transmission core tube.

(Operation) In the ultrasonic generating and transmitting device of the present invention, the ultrasonic vibration of the electrostrictive vibrator having the structure of the bolted vibrator is transmitted to the vibration transmitting thin tube or thin wire, the vibration transmitting core tube and the outer tube horn.
Can be transmitted in the distal direction. Here, the ends of the vibration transmission core tube and the outer tube horn vibrate in the axial direction and in the direction perpendicular to the axis (transverse wave). As a result, ultrasonic vibration is also received from the inner wall of the core tube as a result of the contact, and as a result, the tip of the vibration-transmitting thin tube or the thin wire performs random vibration including lateral movement and rotational movement other than axial vibration.
As a result, the affected part of the living body is agitated by the combination of the ultrasonic vibration having the phase difference and the direction difference of the vibration of the three ends of the vibration transmitting thin tube or thin wire, the vibration transmitting core tube and the outer tube horn. , Scissors, grinds and effectively emulsifies,
The effect of subdividing can be performed.

Further, when a strong ultrasonic vibration is generated by a conventional magnetostrictive vibrator, the cooling of the coil of the magnetostrictive vibrator becomes complicated by a water-cooled structure. It is a strained vibrator, so no special consideration is required for heat dissipation.
The structure is simple and inexpensive.

(Example) Hereinafter, an example of an ultrasonic wave generation and transmission device according to the present invention will be described with reference to the drawings.

FIG. 1 shows the overall structure of the ultrasonic wave generation and transmission device. In this figure, reference numeral 10 denotes a horn base (vibrator header) made of metal or the like, and a male screw portion to which an outer tube horn is screwed around a tip end portion.
11 is formed, and a female screw portion 12 for screwing a core tube horn is formed at the center of the distal end portion. Further, a bolt shaft 13 for fastening a piezoelectric element or the like is integrated with the rear side of the horn base 10. A through hole 14 is formed in the horn base 10 and the bolt shaft 13 so as to pass through their central axes, and a water absorbing groove 15 is formed in the male screw portion 11. A fastening screw portion 18 is formed on the bolt shaft 13, and a rear side portion serves as a water injection tube connection portion 16. A water absorption pipe 17 communicating with the water absorption groove 15 is connected to the horn base 10.

A core tube for vibration transmission (material is metal such as titanium, zirconium, stainless steel, etc.) is provided at the front end of a core tube horn (metal or the like) 20 to be attached to the center of the front end surface of the horn base 10.
21 is fixed. As shown in FIG. 2, a plurality of thin tubes for vibration transmission (made of metal such as stainless steel) 22 are inserted in advance inside the core tube 21 for vibration transmission. Here, it is preferable that each of the vibration transmitting thin tubes 22 be wavy and slightly bent as shown in FIG. The reason will be described later. At the end of the core tube 21 for vibration transmission, a plurality of water injection thin tubes 23 of the same material and the same diameter and short length are inserted as shown in FIG. The respective water injection thin tubes 23 are bound and integrated at the end portion P of the vibration transmission core tube 21 by fusing silver solder, welding or the like. Except for the binding part, each thin tube
22, 23 do not adhere or weld to each other, so that sufficient flexibility can be maintained.

FIG. 5 shows the core tube of the vibration transmission thin tube 22 and the water injection thin tube 23.
This is an example of the arrangement inside 21, and it is preferable that the thin tube 23 is arranged between the thin tubes 22.

As shown in FIG. 6, the core tube 21 for vibration transmission in which the thin tubes 22 and 23 are bound and integrated at the end portions is inserted into the front end portion of the through hole 24 of the core tube horn 20, and is fused by silver brazing or welding. It is fixed to the core tube horn 20. The core tube horn 20 has a male thread at the rear end
25, and the male screw part 25 is a female screw part on the horn base 10 side.
Screwed to 12. When the core tube horn 20 and the horn base 10 are integrated, the horn base side through hole 14 and the core tube horn side through hole 24 communicate with each other.

As shown in FIG. 1, a two-stage step horn (outer tube horn) 26 made of a hollow metal or the like to be an outer vibration portion is screwed to the outer peripheral portion of the horn base 10, that is, the male screw portion 11. At this time, an O-ring 28 is arranged in an annular groove 27 formed on the mounting end face of the step horn 26 to keep the connection surface between the horn base 10 and the step horn 26 watertight.

FIG. 7 is an enlarged view of the configuration of the distal end side of the vibration transmission core tube 21 and the outer tube horn 26. The distal end of the vibration transmission core tube 21 is preferably 0.75 mm or more larger than the distal end of the outer tube horn 26. 1mm
It has receded to some extent. The provision of the step D between the vibration transmission core tube 21 and the distal end of the outer tube horn 26 as described above means that when the vibration transmission core tube 21 and the distal end of the outer tube horn 26 completely match,
When water inside the outer tube horn 26 is absorbed through the water absorption tube 17,
This is because, at the living body affected part (tissue such as a tumor), the opening of the distal end of the outer tube horn 26 is closed, and the opening of the core tube 21 for vibration transmission is also blocked, thereby causing a problem that the circulation of water is stopped. It is preferable that the tip of the vibration transmission thin tube 22 and the tip of the outer tube horn 26 coincide.

As shown in FIG. 1, the piezoelectric element group 30 is composed of four disk-shaped piezoelectric elements 30A, 30B, 30C and 30D which are electrically connected in parallel, and the horn base 10 and a back block 33 made of metal or the like.
Are tightened and held by using the bolt shaft 13 and the nut. That is, the bolt shaft 13 is inserted into the through-holes of the piezoelectric elements 30A to 30D and the back block 33, and the nut 34 is screwed into the screw portion 18 of the bolt shaft 13 and tightened. Each of the piezoelectric elements 30A to 30D is connected in parallel to the high frequency power supply PW.

In the configuration of the above embodiment, the ultrasonic vibration of the piezoelectric element group 30, mainly the vibration in the thickness direction of each piezoelectric element (longitudinal wave)
Is transmitted through the horn base 10 and the core tube horn 20 to the vibration transmission core tube 21 and the plurality of vibration transmission thin tubes 22 inserted inside the core tube 21, and the vibration transmission sheath is transmitted through the horn base 10. Is transmitted to the two-step horn (outer tube horn) 26. At the same time as the vibration in the thickness direction, ultrasonic vibration (transverse wave) in the radial direction of the piezoelectric element is also generated at the same frequency and transmitted to the horn base 10, and this transverse wave is also transmitted to the vibration transmission core tube 21, the vibration transmission thin tube 22, It is transmitted to the tip of the outer tube horn 26. Here, a phase difference can be generated between the ultrasonic vibration at the distal end of the vibration transmission core tube 21 and the ultrasonic vibration at the distal end of the outer tube horn 26 due to the flexural vibration of the horn base 10 or the like. In addition, the vibration transmission thin tube 22 is bent in a wave shape and has a different length from the vibration transmission core tube 21, and furthermore, comes into contact with the inner wall of the vibration transmission core tube 21 at several places to receive vibration in the core tube radial direction. The vibration at the tip of the vibration transmitting thin tube 22 is a mixture of vertical vibration, horizontal vibration, and rotational vibration, and has a vibration posture different from the vibration of the distal end of the vibration transmitting core tube 21. In other words, the distal ends of the outer tube horn 26, the vibration transmission core tube 21, and the vibration transmission thin tube 22 perform ultrasonic vibration in mutually different vibration postures, and stir tissue such as meat pieces of the affected part of the living body. , Scissors, grinds, emulsifies, and subdivides can be performed much more effectively than in the case of a single tube (the conventional structure of FIG. 8).

Then, the through holes 14 and 24 serving as water injection channels, and the vibration-transmitting thin tube 2
It is possible to supply a physiological saline solution or the like to the emulsified portion of the affected part through the internal space of 2, the water injection thin tube 23 and the vibration transmission core tube 21 as shown by arrow Q in FIG. By this water injection operation, the vibration transmission core tube 21 and the vibration transmission thin tube 22
It also cools itself. The emulsified and subdivided tissue of the affected part of the living body absorbs the space between the outer tube horn 26 and the vibration transmission core tube 21 through the path of the water absorption groove 15 and the water absorption tube 17 as shown by the arrow R in FIG. Thereby, it is sucked and removed. At this time, since the distal end of the vibration transmission core tube 21 retreats from the distal end of the outer tube horn 26 to form a step D, even if the outer tube horn 26 and the diseased tissue are close to a close contact state, the physiological saline And the like are circulated through the step D, so that the affected tissue is not adsorbed to the outer tube horn 26 and does not cause clogging.

 The structure of the above embodiment has the following features.

(1) The first water injection system that passes through the through hole 2 and passes through the inside of the vibration transmission thin tube 22, the inside of the water injection thin tube 23, and the inside of the vibration transmission core tube 21 (around the vibration transmission thin tube 22). An optimal water injection amount can be obtained by having two independent water injection systems with the second water injection system passing through and changing the number of the water injection thin tubes 23 according to the application.

(2) The surface to be emulsified of the affected part can be cooled and washed by the above two water injection systems.

(3) The presence of the step D in which the tip of the vibration transmission core tube 21 is retracted from the tip of the outer tube horn 26 can prevent clogging during the emulsification operation.

(4) The vibration at the tip of the vibration transmitting thin tube 22 is a mixture of longitudinal vibration, lateral vibration and rotational vibration, and the vibration at the tip of the vibration transmitting core tube 21 and the outer tube horn 26 The vibration postures are greatly different, and emulsification and subdivision of the affected part can be performed particularly efficiently.

In the above embodiment, a plurality of the thin tubes for vibration transmission 22 are inserted into the core tube 21 for vibration transmission. However, instead of the thin tubes 22, the thin lines for vibration transmission (they are bent into a wavy shape).
Can be adopted. In this case, there is an advantage that the number of wires inserted into the vibration transmission core tube 21 can be increased by using a vibration transmission thin wire having a considerably small diameter depending on the application.

(Effects of the Invention) As described above, according to the ultrasonic wave generation and transmission device of the present invention, the ultrasonic vibration of the electrostrictive vibrator having the structure of the bolted vibrator is transmitted to the vibration transmitting thin tube or the thin wire, and the vibration transmission. The core tube and the outer tube horn can transmit the vibration in the distal direction, and the vibration phase difference and direction of the vibration at the distal end of each of the vibration transmitting thin tube or thin line and the vibration transmitting core tube and the outer tube horn. By the combination of the ultrasonic vibrations having a difference, the affected part of the living body can be agitated, pinched, ground, and effectively emulsified and finely divided. In particular, the vibration-transmitting thin tube or thin wire is inserted into the vibration-transmitting core tube, and is bound and integrated at the end portion. And the tip of the vibration-transmitting thin tube or thin wire projects from the vibration-transmitting core tube and is close to the tip of the outer tube horn. By setting the vibration of the vibration as a vibration posture greatly different from the vibration of the tip of the outer tube horn, the emulsification and subdivision of the affected part can be performed more efficiently.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing an embodiment of an ultrasonic generating and transmitting apparatus according to the present invention. FIG. 2 is an exploded perspective view showing a case where a thin tube is provided in a vibration transmission core tube in the embodiment. 3 is a front view showing an example of the shape of the vibration transmitting thin tube, FIG. 4 is a perspective view showing a vibration transmitting core tube in which the thin tube is integrated, FIG. 5 is a sectional view taken along line VV of FIG. 6 is a front sectional view showing a core tube horn in which a vibration transmission core tube is integrated, FIG. 7 is an enlarged perspective view showing a configuration of an outer tube horn and a distal end portion of the vibration transmission core tube, and FIG. It is a perspective view which shows the structure of the front-end | tip part of the conventional ultrasonic surgical suction apparatus. 10… horn base, 13… bolt shaft, 14, 24… through hole, 15… water absorption groove, 17… water absorption pipe, 20… core horn,
21 ... Vibration transmission core tube, 22 ... Vibration transmission thin tube, 23 ...
Narrow tube for water injection, 26: Two-step horn (outer tube horn), 30: Piezoelectric element group, 30A to 30D: Piezoelectric element, 33
… Back block, 34… nuts.

 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-62-114545 (JP, A) JP-A-62-152704 (JP, U) Patent 2539622 (JP, B2)

Claims (4)

(57) [Claims] A piezoelectric element is fastened with a bolt shaft (13) between a horn base (10) and a back block (33), a vibration-transmitting thin tube or a thin wire is inserted, and the thin tube or the thin wire is inserted at an end portion. Core tube for vibration transmission (2
1) The core tube horn (20) is fixed to the tip of the core tube horn (20), and the core tube horn (20) is connected to the center of the horn base (10) to transmit vibration to the outer peripheral portion of the horn base (10). An outer tube horn (26) serving as an outer shell is connected, and the vibration transmitting thin tube or the thin wire is wavy and bent so as to come into contact with the inner wall of the vibration transmitting core tube (21), and The tip of the thin tube or wire is the core tube for vibration transmission (21)
The core tube horn (20) further protrudes and is close to the tip of the outer tube horn (26). The core tube horn (20) has a through hole (24) serving as a water injection passage communicating with the inside of the vibration transmission core tube (21). An ultrasonic wave generation and transmission device, wherein a space between the outer tube horn (26) and the vibration transmission core tube (21) and the core tube horn (20) serves as a water absorption path. 2. An ultrasonic wave according to claim 1, wherein said horn base and said bolt shaft have a through hole communicating with a through hole of said core tube horn. Generation transmission device. 3. The horn base (10) is provided with a water suction passage communicating with a space between the outer tube horn (26) and the vibration transmission core tube (21) and the core tube horn (20). The ultrasonic generating and transmitting device according to claim 1, wherein 4. A water injection thin tube (23) having a short length is inserted into an end portion of the vibration transmission core tube (21).
The ultrasonic generating and transmitting device according to claim 1.