JP2013099418A - Ultrasonic treatment instrument and ultrasonic treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make ultrasonic waves selectively act on an intended area.SOLUTION: An ultrasonic treatment instrument includes: a columnar ultrasonic vibrator 5 for generating ultrasonic vibrations of different vibration modes by applying alternating voltages of different frequencies; a probe 3 in which one end is connected to the ultrasonic vibrator 5 and which is extended in the longitudinal direction of the ultrasonic vibrator 5; and a holding part 8 capable of holding the ultrasonic vibrator 5 at the position of the node of the ultrasonic vibrations in the respective vibration modes. Also, an ultrasonic treatment apparatus includes: the ultrasonic treatment instrument; a voltage supply part for supplying the alternating voltages of the different frequencies to the ultrasonic vibrator 5; and a vibration mode selection means for alternatively selecting the alternating voltage to be supplied to the ultrasonic vibrator 5 by the voltage supply part.

Description

  The present invention relates to an ultrasonic treatment tool and an ultrasonic treatment apparatus.

  Conventionally, a device for emulsifying and crushing fat by ultrasonically vibrating a probe inserted into the body is known (for example, see Patent Document 1).

Japanese Patent No. 4472759

  However, in Patent Document 1, there is an antinode of ultrasonic vibration at the approximate center in the longitudinal direction of the probe in addition to the tip of the probe, and the ultrasonic wave acts on the front region and the side region of the probe. . Accordingly, although the fat is emulsified and pulverized by the tip portion of the probe, there is a disadvantage that the ultrasonic wave unintentionally acts on the tissue existing on the side of the probe.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide an ultrasonic treatment tool and an ultrasonic treatment apparatus that can selectively apply ultrasonic waves to an intended region.

In order to achieve the above object, the present invention provides the following means.
The present invention relates to a columnar ultrasonic vibrator that generates ultrasonic vibrations of different vibration modes by applying alternating voltages of different frequencies, and one end connected to the ultrasonic vibrator and the longitudinal direction of the ultrasonic vibrator. There is provided an ultrasonic treatment instrument including a probe extending in a direction and a holding unit capable of holding the ultrasonic transducer at a position of a node of ultrasonic vibration in each vibration mode.

  According to the present invention, the ultrasonic transducer generates ultrasonic vibration in a vibration mode corresponding to the frequency of the applied alternating voltage, and the ultrasonic vibration is transmitted to the probe, whereby the tissue in the vicinity of the probe is obtained. Can be treated. The ultrasonic vibrator can be stably vibrated by being held by the holding portion at the position of the ultrasonic vibration node.

  In this case, which position of the probe becomes an antinode of ultrasonic vibration and ultrasonic vibration is sufficiently strong depends on the vibration mode. Therefore, it is possible to select an area on which an ultrasonic wave is applied according to a vibration mode for driving the ultrasonic vibrator, and to selectively apply an ultrasonic wave to an intended area.

In the above invention, the different vibration modes may be a longitudinal vibration mode in which the ultrasonic vibrator is longitudinally vibrated and a bending vibration mode in which the ultrasonic vibrator is flexibly vibrated.
In this way, in the longitudinal vibration mode in which the ultrasonic transducer is displaced in the longitudinal direction, strong ultrasonic vibration is generated at the tip of the probe, so that the tissue disposed in front of the probe tip can be treated efficiently. it can. On the other hand, in the bending vibration mode in which the ultrasonic transducer is displaced in the width direction, strong ultrasonic vibration is generated at an intermediate position of the probe, so that the tissue disposed on the side of the probe can be treated efficiently.

In the above invention, the ultrasonic transducer is fixed to a prismatic elastic body, a single piezoelectric element fixed to one side surface of the elastic body, and the other side surface of the elastic body. The pair of piezoelectric elements may be arranged so that the polarization directions are opposite to each other.
By doing so, an alternating voltage is applied to a single piezoelectric element in the longitudinal vibration mode to generate a primary longitudinal vibration in the elastic body, and an alternating voltage is applied to a pair of piezoelectric elements in the bending vibration mode. By doing so, the secondary bending vibration can be generated in the elastic body.

In the invention described above, the holding unit may hold a position of a node common to the longitudinal vibration mode and the bending vibration mode of the ultrasonic transducer.
By doing so, it is not necessary to change the position held by the holding portion when the vibration mode is changed, and the operation can be facilitated.

Moreover, in the said invention, the said holding | maintenance part is good also as being provided between the holding position holding the position of the said node of the said ultrasonic transducer | vibrator, and the releasing position released.
By doing in this way, when the position of the node moves according to the vibration mode, the node held by the holding unit and the node to be released can be easily changed according to each vibration mode.

In the above invention, the ultrasonic vibrator is accommodated, and a cylindrical case is formed in which a screw hole penetrating in the wall thickness direction is formed at a position corresponding to the node, and the holding portion includes the screw hole. It is good also as providing the screw fastened to.
By doing in this way, the position of each node of an ultrasonic transducer | vibrator can be easily hold | maintained or released with respect to a case by tightening or loosening a screw to a screw hole.

In the above invention, the ultrasonic transducer includes a prismatic elastic body and a piezoelectric element fixed to one side surface of the elastic body, and is located at a position corresponding to the screw hole of the piezoelectric element. In addition, a through hole that penetrates in the thickness direction and into which the tip of the screw is inserted may be formed.
In this way, when the screw is tightened, the tip of the screw penetrates the piezoelectric element and is pressed against the side surface of the elastic body. Thereby, damage to the piezoelectric element due to being pressed by the tip of the screw can be prevented.

Moreover, in the said invention, it is good also as providing the alerting | reporting means which detects and alert | reports the contact with this screw and the said ultrasonic transducer | vibrator provided in the said screw | thread.
By doing so, the operator can easily recognize that the ultrasonic vibrator is securely held on the case by the screw and which position of the ultrasonic vibrator is held by the screw. can do.

Moreover, in the said invention, it is good also as providing the display part which shows the said vibration mode.
In this way, the operator can easily identify which vibration mode is currently driving the ultrasonic transducer.

  Further, in the above invention, a cylindrical case that accommodates the ultrasonic transducer is provided, and the holding portion includes a ball plunger provided in the case with a ball directed radially inward, and the ultrasonic wave The vibrator may have a groove into which the ball is fitted at the position of the node on the side surface.

  In this way, when the ultrasonic vibrator is moved in the longitudinal direction within the case, the position of the ultrasonic vibrator is held at the position where the ball plunger ball fits into the groove, and the ultrasonic vibration is at the position of the node. The ball plunger holds the case. In this way, the position of the ultrasonic transducer held in the case can be easily changed only by a simple operation of sliding the ultrasonic transducer.

In the above invention, the holding portion includes a balloon provided at the position of the node on the side surface of the ultrasonic transducer, and a pipe that communicates with the inside of the balloon and extends to the proximal end side of the ultrasonic transducer. It is good also as providing.
By doing so, by supplying fluid to the balloon via the conduit and inflating the balloon, the ultrasonic transducer is supported by the surrounding tissue via the balloon, and the position and posture of the ultrasonic transducer Can be kept stable. Moreover, the position of the node of the ultrasonic transducer can be held with respect to the tissue by selecting the position of the balloon to be inflated according to the vibration mode.

Moreover, in the said invention, the display which shows the said vibration mode corresponding to the position of the antinode in each vibration mode of the said probe is good.
In this way, it is possible to easily recognize at which position of the probe strong ultrasonic vibration occurs in each vibration mode.

  The present invention also provides the ultrasonic treatment instrument described above, a voltage supply unit that supplies the ultrasonic transducer with an alternating voltage having a different frequency, and the voltage supply unit supplies the ultrasonic transducer to the ultrasonic transducer. There is provided an ultrasonic treatment apparatus comprising vibration mode selection means for alternatively selecting the alternating voltage.

According to the present invention, one vibration mode is selected by the vibration mode selection means, and the voltage supply unit applies an alternating voltage having a frequency corresponding to the selected vibration mode to the ultrasonic vibrator, so that a desired vibration mode is obtained. The tissue can be treated by driving the ultrasonic transducer and vibrating the probe ultrasonically.
In this case, which position of the probe vibrates sufficiently strongly depends on the vibration mode. Therefore, it is possible to select an area on which an ultrasonic wave is applied according to a vibration mode for driving the ultrasonic vibrator, and to selectively apply an ultrasonic wave to an intended area.

  According to the present invention, there is an effect that ultrasonic waves can be selectively applied to an intended region.

1 is an overall configuration diagram of an ultrasonic treatment apparatus according to a first embodiment of the present invention. 2A is a plan view, FIG. 2B is a sectional view taken along the line IIa-IIa, FIG. 2C is a sectional view taken along the line IIb-IIb, and FIG. 2D is a sectional view taken along the line IIc-IIc. . It is a figure explaining operation | movement of an ultrasonic transducer | vibrator and a probe in (a) longitudinal vibration mode and (b) bending vibration mode. It is a perspective view which shows the modification of the piezoelectric element with which the ultrasonic transducer | vibrator of FIG. 2 is provided. It is (a) top view and (b) VV sectional drawing which show the structure of the ultrasonic generation part with which the ultrasonic treatment apparatus concerning the 2nd Embodiment of this invention is provided. It is (a) top view and (b) VI-VI sectional drawing which show the structure of the ultrasonic generation part with which the ultrasonic treatment apparatus concerning the 3rd Embodiment of this invention is provided. It is (a) top view, (b) VIIa-VIIa sectional view, and (c) VIIb-VIIb sectional drawing which show composition of an ultrasonic generating part with which an ultrasonic treatment device concerning a 4th embodiment of the present invention is provided. It is (a) top view and (b) VIII-VIII longitudinal cross-sectional view which show the structure of the ultrasonic generation part with which the ultrasonic treatment apparatus concerning the 5th Embodiment of this invention is provided. It is a perspective view which shows the structure of the ultrasonic transducer | vibrator with which the ultrasonic treatment apparatus concerning the 6th Embodiment of this invention is provided. It is a figure explaining the operation | movement in the bending vibration mode of the ultrasonic transducer | vibrator of FIG. It is a longitudinal cross-sectional view of an ultrasonic wave generation part provided with the ultrasonic transducer | vibrator of FIG. It is the (a) top view, (b) side view, and (c) front view which show the structure of the ultrasonic generation part with which the ultrasonic treatment apparatus concerning the 7th Embodiment of this invention is provided. It is a figure explaining the usage method by (a) longitudinal vibration mode and (b) bending vibration mode of an ultrasonic treatment tool provided with the ultrasonic wave generation part of FIG.

Hereinafter, an ultrasonic treatment device 1 according to a first embodiment of the present invention and an ultrasonic treatment apparatus 100 including the ultrasonic treatment device 1 will be described with reference to FIGS. 1 to 4.
As shown in FIG. 1, an ultrasonic treatment apparatus 100 according to this embodiment includes an ultrasonic treatment device 1 including an ultrasonic wave generation unit 2 that generates ultrasonic waves and a straight rod-like probe 3 that is inserted into the body. The ultrasonic treatment instrument 1 includes a control device (voltage supply unit) 20 connected via a cable 4.

As shown in FIG. 2, the ultrasonic generator 2 includes an ultrasonic vibrator 5 including a prismatic elastic body 51 and a plate-like piezoelectric element 52 fixed to one side surface of the elastic body 51; And a case 6 for housing the ultrasonic transducer 5.
The elastic body 51 is made of a metal such as stainless steel, a titanium alloy, or aluminum, and has a mirror finish on one side.

  The piezoelectric element 52 is made of, for example, lead zirconate titanate (PZT). A metal film as an electrode is formed on the front and back surfaces of the piezoelectric element 52, and is polarized in a direction from the positive electrode on the front surface side to the negative electrode on the back surface side as indicated by an arrow P. The back surface of the piezoelectric element 52 is bonded to one side surface of the elastic body 51 that is mirror-finished by an adhesive such as an epoxy resin. Wirings 4 a and 4 b are respectively connected to the positive electrode formed on the piezoelectric element 52 and the base end face of the elastic body 51, and these wirings 4 a and 4 b are connected to the control device 20 through the cable 4. The probe 3 extends from the distal end surface of the elastic body 51 along the substantially central axis of the elastic body 51. The probe 3 is formed integrally with the elastic body 51 and is made of the same material as the elastic body 51.

  The case 6 is made of a hard material and has a dimension in the longitudinal direction according to the application. That is, for example, when the probe 3 and the ultrasonic wave generator 2 are used by being inserted into a channel of a flexible endoscope (when used for medical treatment), the probe 3 and the ultrasonic wave generator 2 are sufficient even in a curved channel. It is formed sufficiently short so that operability can be obtained. On the other hand, when the ultrasonic generator 2 is arranged outside the body and only the probe 3 is inserted into the body for use (when used for surgical treatment), the dimensions of the case 6 are not particularly limited.

  On the side wall of the case 6, a screw that penetrates in the wall thickness direction at a position facing the four side surfaces of the ultrasonic transducer 5 and corresponding to a longitudinal vibration node and a bending vibration node (described later) of the ultrasonic transducer 5. Holes 7a and 7b are formed, and screws (holding portions) 8 are inserted into these screw holes 7a and 7b. Hereinafter, the screw hole 7a provided at the position of the longitudinal vibration node is also referred to as a first screw hole 7a, and the screw hole 7b provided at the position of the bending vibration node is also referred to as a second screw hole 7b.

  As shown in FIG. 2C, the four screws 8 arranged in the circumferential direction are tightened and moved to a position where the tip of each screw 8 contacts the side surface of the ultrasonic transducer 5 (holding position). The acoustic transducer 5 is held by the case 6 at the node position. On the other hand, as shown in FIG. 2 (d), the four screws 8 arranged in the circumferential direction are loosened and moved to positions where the tips of the screws 8 are sufficiently separated from the side surface of the ultrasonic transducer 5 (release position). Thus, the position of the node of the ultrasonic transducer 5 is released in the case 6.

  The control device 20 turns on / off the vibration mode selection switch (vibration mode selection means) 21 for selecting one of the longitudinal vibration mode and the bending vibration mode and the output of the alternating voltage to the ultrasonic treatment instrument 1 according to the operation by the operator. And a foot switch 22. When “A” indicating the longitudinal vibration mode is selected by the vibration mode selection switch 21, the control device 20 has a first frequency that is substantially the same as the resonance frequency of the primary longitudinal vibration of the ultrasonic transducer 5. The alternating voltage is generated. On the other hand, when “B” indicating the bending vibration mode is selected by the vibration mode selection switch 21, the control device 20 has substantially the same frequency as the resonance frequency of the primary bending vibration of the ultrasonic transducer 5. A second alternating voltage is generated.

  In the figure, reference numeral 23 denotes a mode display window (display unit) for displaying the vibration mode selected by the vibration mode selection switch 21. Reference numeral 24 denotes an output adjustment dial that adjusts the magnitude of the output of the alternating voltage from the control device 20. Reference numeral 25 denotes an output display window for displaying the magnitude of the output of the alternating voltage from the control device 20.

  When the first or second alternating voltage is applied from the control device 20 to the ultrasonic transducer 5 via the wires 4a and 4b, the piezoelectric element 52 expands and contracts, and the elastic body follows the expansion and contraction of the piezoelectric element 52. When 51 is deformed, the ultrasonic transducer 5 generates ultrasonic vibration. The generated ultrasonic vibration is transmitted to the probe 3, and the probe 3 vibrates ultrasonically. 3A and 3B show the positions of the nodes and the belly when the ultrasonic transducer 5 is driven in the longitudinal vibration mode and the bending vibration mode, respectively.

  In the longitudinal vibration mode, the ultrasonic transducer 5 is displaced in the length direction as shown in FIG. At this time, the substantially center position in the longitudinal direction of the ultrasonic transducer 5 and the midway position of the probe 3 become nodes N1 and N2 of longitudinal vibration, and the vicinity of the tip of the probe 3 becomes an antinode L1 of longitudinal vibration. Therefore, the amount of change in the ultrasonic vibration of the probe 3 is sufficiently large in the region X1 near the tip.

  On the other hand, in the bending vibration mode, as shown in FIG. 3B, the ultrasonic transducer 5 is displaced in the width direction. At this time, both ends of the ultrasonic transducer 5 and the midway position of the probe 3 are nodes N3 to N5, and the tip of the probe 3 is an antinode L2. Therefore, the amount of change of the ultrasonic vibration of the probe 3 is sufficiently large in the lateral region X2 at the midway position.

  Here, for example, “A” and “B” are displayed as the indications indicating the vibration modes corresponding to the positions where the probe 3 is ultrasonically vibrated more strongly in each vibration mode, that is, the positions corresponding to the antinodes L1 and L2 of each vibration. The character 9 may be attached. Also, in the vicinity of the screw holes 7a and 7b, the letters 9 “A” and “B” may be added as an indication of which vibration mode each screw hole 7a and 7b corresponds to. .

Next, the operation of the ultrasonic treatment apparatus 100 configured as described above will be described by taking as an example a case where fat in the body is decomposed using a cavitation effect by ultrasonic waves.
In order to decompose fat in the body using the ultrasonic treatment apparatus 100 according to the present embodiment, first, the operator selects the vibration mode to be used according to the position of the fat to be decomposed by the vibration mode selection switch 21. Then, the screw 8 at the position corresponding to the selected vibration mode is tightened.

  Specifically, when there is fat to be decomposed forward with respect to the insertion direction of the probe 3, the mode changeover switch 21 selects “A” which is the longitudinal vibration mode and inserts it into the first screw hole 7a. Tighten the screw 8. Next, the probe 3 is inserted into the body, the tip of the probe 3 is placed close to the fat so that the fat to be decomposed is disposed in the region X1 near the tip of the probe 3, and the foot switch 22 is stepped on. As a result, application of the first alternating voltage from the control device 20 to the ultrasonic transducer 5 is started, the vicinity of the tip of the probe 3 vibrates, and fat is decomposed. At this time, since the ultrasonic transducer 5 is held by the case 6 by the screw 8 at the position of the longitudinal vibration node, it can vibrate stably.

  On the other hand, when fat exists laterally with respect to the insertion direction of the probe 3, the mode changeover switch 21 selects “B” which is the bending vibration mode, and the screw 8 inserted into the second screw hole 7b. Tighten. Next, the probe 3 is inserted into the body, the approximate center position of the probe 3 is arranged close to the fat so that the fat to be decomposed is disposed in the region X2 on the side of the probe 3, and the foot switch 22 is stepped on. Thereby, application of the second alternating voltage from the control device 20 to the ultrasonic transducer 5 is started, and the vicinity of the approximate center position vibrates from the approximate center position of the probe 3 to decompose fat. At this time, since the ultrasonic transducer 5 is held by the case 6 with the screw 8 at the position of the bending vibration node, it can vibrate stably.

  Thus, according to the present embodiment, by selecting the vibration mode according to the positional relationship between the probe 3 and the fat to be decomposed, it can be decomposed by effectively applying ultrasonic waves to the fat. There are advantages. Further, in the longitudinal vibration mode, the approximate center position in the longitudinal direction of the probe 3 becomes a node of longitudinal vibration, and there is an advantage that ultrasonic waves can be selectively applied to fat disposed in the vicinity of the tip of the probe 3.

In the present embodiment, one piezoelectric element 52 is used, but instead of this, as shown in FIG. 4, a plurality of (four in the illustrated example) piezoelectric elements 521 are provided. It may be used. In this configuration, the plurality of piezoelectric elements 521 are arranged so that the polarization directions indicated by the arrows P coincide.
Even in this case, the ultrasonic transducer 501 can generate the primary longitudinal vibration and the primary bending vibration as in the case of using the piezoelectric element 52 described above.

Next, an ultrasonic treatment apparatus according to the second embodiment of the present invention will be described with reference to FIG.
Note that the second embodiment and the third to seventh embodiments to be described later are mainly described in terms of differences from the first embodiment described above, and the configuration common to the first embodiment is described. Omitted.
The ultrasonic treatment apparatus according to this embodiment is obtained by changing the configuration of the ultrasonic generator 2 in the ultrasonic treatment apparatus 100 according to the first embodiment, and is shown in FIGS. 5 (a) and 5 (b). As shown, the piezoelectric element 522 has a through hole 52a penetrating in the thickness direction at a position corresponding to the screw holes 7a and 7b.

  According to the present embodiment, in addition to the effect of the first embodiment, when the screw 8 is tightened, the tip of the screw 8 is pressed against the elastic body 51 through the through hole 52a. It is possible to prevent the piezoelectric element 522 from being damaged.

Next, an ultrasonic treatment apparatus according to the third embodiment of the present invention will be described with reference to FIG.
The ultrasonic treatment apparatus according to this embodiment is obtained by changing the configuration of the ultrasonic generator 2 in the ultrasonic treatment apparatus 100 according to the first embodiment. That is, in the first embodiment, the second screw hole 7b is formed in the case 6 at a position corresponding to one of the two nodes N3 and N4 of the bending vibration. In the embodiment, as shown in FIGS. 6A and 6B, the second screw hole 7b is formed at a position of the case 601 corresponding to both nodes N3 and N4.

  According to the present embodiment, in addition to the effects of the first embodiment, the ultrasonic transducer 503 can be held more stably with respect to the case 601 when the ultrasonic transducer 503 flexurally vibrates.

Next, an ultrasonic treatment apparatus according to the fourth embodiment of the present invention will be described with reference to FIG.
The ultrasonic treatment apparatus according to this embodiment is obtained by changing the configuration of the ultrasonic generator 2 in the ultrasonic treatment apparatus 100 according to the first embodiment. That is, in the first embodiment, the screw 8 is employed as a holding portion for holding the ultrasonic transducer 5 in the case 6, but instead of this, in the present embodiment, FIG. As shown in (c), a ball plunger (holding portion) 10 is provided on the case 602 with the ball 10a facing inward in the radial direction. A groove 51a into which the ball 10a is fitted is formed at the position.

  According to this embodiment, in addition to the effect by 1st Embodiment, there exist the following effects. That is, when the ultrasonic vibrator 504 is slid in the longitudinal direction (see arrow B) in the case 602, the ultrasonic vibrator 504 is held by the case 602 at a position where the ball 10a is fitted in the groove 51a. The ultrasonic transducer 504 is positioned at the position indicated by the broken line. At the same time, since the display B of the probe is hidden inside the case 602 and becomes only the display A, the operator indicates that the position indicated by the broken line is the longitudinal vibration mode without viewing the mode display window 23 of the control device 20. I can recognize that. In this way, the position held by the case 602 of the ultrasonic transducer 504 can be easily changed simply by sliding the ultrasonic transducer 504 and changing the groove 51a into which the ball 10a is fitted.

Next, an ultrasonic treatment apparatus according to the fifth embodiment of the present invention will be described with reference to FIG.
The ultrasonic treatment apparatus according to the embodiment is obtained by changing the configuration of the ultrasonic generator 2 in the ultrasonic treatment apparatus 100 according to the first embodiment. That is, in the present embodiment, the ultrasonic wave generation unit includes a mechanism for identifying which screw 8 holds the ultrasonic transducer 5. For example, as shown in FIGS. 8A and 8B, each screw 8 includes a light bulb (notification means) 11 having a + terminal connected to the tip of the screw 8 and a − terminal connected to the elastic body 51. . When the screw 8 is tightened and the tip of the screw 8 comes into contact with the piezoelectric element 52, the contact is detected by the light bulb 11, and the light bulb 11 is turned on.

  According to this embodiment, in addition to the effect by 1st Embodiment, there exist the following effects. That is, even if the operator does not visually recognize the mode display window 23 of the control device 20, the screws 8 holding the ultrasonic transducer 5 display “A” and “B” (symbol 9) indicating the vibration mode. It is possible to easily recognize the state of the vibration mode simply by confirming which of the two is. Moreover, it can confirm that each screw 8 is fully tightened by lighting of the light bulb 11.

Next, an ultrasonic treatment apparatus according to the sixth embodiment of the present invention will be described with reference to FIGS.
The ultrasonic treatment apparatus according to the embodiment is obtained by changing the configuration of the ultrasonic transducer 5 in the ultrasonic treatment apparatus 100 according to the first embodiment. That is, in the first embodiment, the longitudinal vibration and the bending vibration are generated by using the common piezoelectric element 52, but instead of this, in the present embodiment, as shown in FIG. The piezoelectric elements 525 and 526 are fixed to the two side surfaces of the elastic body 51, longitudinal vibration is generated by the piezoelectric element 525 on one side surface, and bending vibration is generated by the piezoelectric element 526 on the other side surface. Here, on the other side surface, the pair of piezoelectric elements 526 are arranged so that the polarization directions indicated by the arrows P are opposite to each other so that secondary bending vibration is generated.

  According to this embodiment, in addition to the effect by 1st Embodiment, there exist the following effects. That is, when a second alternating voltage is applied to the piezoelectric element 526 of the ultrasonic transducer 505 configured as described above, secondary bending vibration is generated in the ultrasonic transducer 505 as shown in FIG. . Here, among the nodes N6 to N10 of the secondary bending vibration, the node N7 at the substantially center position of the ultrasonic transducer 505 is common to the node N1 of the primary longitudinal vibration. Therefore, as shown in FIG. 11, by providing the screw hole 7 at a position corresponding to this one node N7 (node N1) and holding the position of the node N7 of the ultrasonic transducer 505 with the screw 8, both In the vibration mode, the ultrasonic transducer 505 is stably held by the case 603. Thereby, the operation of the screw 8 accompanying the change of the vibration mode is not required, and the vibration mode can be changed while the ultrasonic wave generator 2 is inserted into the body.

Next, an ultrasonic treatment apparatus according to a seventh embodiment of the present invention will be described with reference to FIGS.
The ultrasonic treatment apparatus according to the embodiment is obtained by changing the configuration of the ultrasonic generator 2 in the ultrasonic treatment apparatus 100 according to the first embodiment. That is, in the first embodiment, the screw 8 is adopted as a holding portion for holding the ultrasonic transducer 5 in the case 6, but instead of this, in the present embodiment, FIG. As shown in (c), the case 6 is omitted, and a balloon 12 is provided on the side surface of the ultrasonic transducer at the position of each vibration node.

  12A to 12C illustrate a configuration in which the balloon 12 is provided at the position of the node N7 of the ultrasonic transducer 505 shown in FIG. The balloon 12 may also be provided at the position of the node N9 (N2) of the probe 3. Each balloon 12 is connected to a tube (pipe) 13 for conveying a fluid between the balloon 12 and a pump (not shown) disposed outside the body.

  As shown in FIGS. 13A and 13B, the ultrasonic transducer 505 is supplied by inflating the balloon 12 by supplying a fluid into the balloon 12 while pressurizing the fluid in a relatively narrow space such as a lumen. It is supported by a surrounding tissue Y such as a cavity wall via the balloon 12. Thereby, the positions of the nodes of the ultrasonic transducer 505 and the probe 3 are held with respect to the tissue Y. 13A shows a case where the fat Z disposed in front of the probe 3 is decomposed in the longitudinal vibration mode. FIG. 13B shows a case where the fat Z disposed in the side of the probe 3 is decomposed in the bending vibration mode. Shows when to do. In addition, illustration of wiring 4a, 4b and the tube 13 is abbreviate | omitted in FIG. 13 (a), (b).

  According to this embodiment, in addition to the effect by 1st Embodiment, there exist the following effects. That is, in this way, the case 6 is omitted, and the ultrasonic generator 201 is constituted by the ultrasonic transducer 505, the balloon 12, and the tube 13, so that the ultrasonic generator 201 is reduced in diameter so as to have a lumen-like shape. It can be configured to be easily inserted into a relatively narrow body cavity. Further, by adjusting the size of the balloon 12 to be inflated, the ultrasonic wave generator 201 and the probe 3 can be easily maintained in a desired posture.

  As described above, the first to seventh embodiments of the ultrasonic treatment instrument and the ultrasonic treatment apparatus according to the present invention have been described. However, these embodiments may be combined as appropriate.

DESCRIPTION OF SYMBOLS 1 Ultrasonic treatment tool 2,201 Ultrasonic wave generation part 3 Probe 4 Cable 4a, 4b Wiring 5,501-505 Ultrasonic vibrator 6,601-603 Case 7a, 7b Screw hole 8 Screw (holding part)
9 characters (display)
10 Ball plunger (holding part)
10a ball 11 light bulb (notification means)
12 Balloon (holding part)
13 Tube (Piping)
20 Control device (voltage supply unit)
21 Vibration mode selection switch (vibration mode selection means)
22 foot switch 23 mode display window 24 output adjustment dial 25 output display window 51,511 elastic body 51a groove 52,521-526 piezoelectric element 52a through hole 100 ultrasonic treatment apparatus

Claims (13)

A columnar ultrasonic transducer that generates ultrasonic vibrations of different vibration modes by applying alternating voltages of different frequencies;
A probe having one end connected to the ultrasonic transducer and extending in the longitudinal direction of the ultrasonic transducer;
An ultrasonic treatment instrument comprising: a holding unit capable of holding the ultrasonic transducer at a position of an ultrasonic vibration node in each of the vibration modes.   The ultrasonic treatment instrument according to claim 1, wherein the different vibration modes are a longitudinal vibration mode in which the ultrasonic vibrator is longitudinally vibrated and a bending vibration mode in which the ultrasonic vibrator is flexibly vibrated. The ultrasonic vibrator includes a prismatic elastic body, a single piezoelectric element fixed to one side surface of the elastic body, and a pair of piezoelectric elements fixed to the other side surface of the elastic body. With
The ultrasonic treatment instrument according to claim 2, wherein the pair of piezoelectric elements are arranged so that polarization directions are opposite to each other.   The ultrasonic treatment instrument according to claim 3, wherein the holding unit holds a position of a node common to the longitudinal vibration mode and the bending vibration mode of the ultrasonic vibrator.   The ultrasonic treatment instrument according to claim 1, wherein the holding portion is provided so as to be movable between a holding position for holding the position of the node of each ultrasonic transducer and a release position for releasing the node. A cylindrical case that accommodates the ultrasonic transducer and has a screw hole that penetrates in the wall thickness direction at a position corresponding to the node,
The ultrasonic treatment instrument according to claim 5, wherein the holding unit includes a screw fastened to the screw hole. The ultrasonic vibrator includes a prismatic elastic body and a piezoelectric element fixed to one side surface of the elastic body,
The ultrasonic treatment instrument according to claim 6, wherein a through-hole is formed at a position corresponding to the screw hole of the piezoelectric element so as to penetrate in a thickness direction and into which a tip portion of the screw is inserted.   The ultrasonic treatment instrument according to claim 6 or 7, further comprising a notification unit that is provided on the screw and detects and notifies contact between the screw and the ultrasonic transducer.   The ultrasonic treatment tool according to claim 1, further comprising a display unit that indicates the vibration mode. A cylindrical case that accommodates the ultrasonic transducer,
The holding portion includes a ball plunger provided in the case with the ball directed radially inward,
The ultrasonic treatment instrument according to claim 1, wherein the ultrasonic transducer has a groove into which the ball is fitted at a position of the node on a side surface.   The said holding | maintenance part is provided with the balloon provided in the position of the said node of the side surface of the said ultrasonic transducer | vibrator, and the piping extended in the base end side of the said ultrasonic transducer | vibrator in the inside of this balloon. Ultrasonic treatment tool.   The ultrasonic treatment tool according to claim 1, wherein a display indicating the corresponding vibration mode is attached to an antinode position in each vibration mode of the probe. The ultrasonic treatment instrument according to claim 1;
A voltage supply unit for supplying an alternating voltage having a different frequency to the ultrasonic transducer;
An ultrasonic treatment apparatus comprising: vibration mode selection means for alternatively selecting the alternating voltage supplied to the ultrasonic transducer by the voltage supply unit.

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