JP2005074088A - Ultrasonic treating instrument - Google Patents

Ultrasonic treating instrument Download PDF

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Publication number
JP2005074088A
JP2005074088A JP2003310371A JP2003310371A JP2005074088A JP 2005074088 A JP2005074088 A JP 2005074088A JP 2003310371 A JP2003310371 A JP 2003310371A JP 2003310371 A JP2003310371 A JP 2003310371A JP 2005074088 A JP2005074088 A JP 2005074088A
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Japan
Prior art keywords
vibration
ultrasonic
treatment
region
portion
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JP2003310371A
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Japanese (ja)
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Hideto Yoshimine
英人 吉嶺
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Olympus Corp
オリンパス株式会社
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Priority to JP2003310371A priority Critical patent/JP2005074088A/en
Publication of JP2005074088A publication Critical patent/JP2005074088A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an ultrasonic treating instrument capable of effectively preventing transverse vibration generated at a treating part while preventing diameter enlargement. <P>SOLUTION: This ultrasonic treating instrument 1 is provided with an ultrasonic vibrator unit 3 for generating ultrasonic vibration, and an elongate vibration transmission member 5 with the proximal end connected to the vibrator unit 3 and with the distal end formed with the treating part of asymmetric shape with respect to a center axis. The ultrasonic vibration generated by the vibrator unit 3 is transmitted from the proximal end to the distal end of the vibration transmission member 5. The treating part 30 is provided with an adjusting hole 34 for suppressing transverse vibration by adjusting the generated amount of torque generated when the ultrasonic vibration is transmitted. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an ultrasonic treatment instrument for performing a surgical treatment on a living tissue using ultrasonic vibration.

Patent Document 1 discloses an ultrasonic treatment tool used for a surgical procedure. This ultrasonic treatment tool is ultrasonically vibrated at the rear end of the probe (vibration transmitting member) and transmits the ultrasonic vibration to the treatment portion at the distal end of the probe. The treatment portion is formed to have two parallel planes, whereas the proximal end side of the probe is formed in a cylindrical rod shape. The treatment portion is sequentially provided with a treatment portion and a balance portion from the distal end side to the proximal end portion side of the probe. When the treatment portion is viewed from the side, it is formed in a right triangle shape with the upper side cut out. For this reason, the center of gravity of the treatment portion is below the center axis of the probe. The balance part is provided between the proximal end of the treatment part and the vibration node. The balance portion has a cutout in order to maintain a balance when the center of gravity is lowered from the center axis of the probe in the treatment portion. In this way, when the probe is vibrated ultrasonically, a balance can be obtained and lateral vibration can be prevented from occurring in the probe.
US Patent Application Publication No. 2002/0077644

  However, the ultrasonic treatment tool disclosed in Patent Document 1 described above needs to protrude so as to project the outside of the balance portion in some cases in order to balance the center of gravity of the treatment portion. For this reason, there is a possibility that the diameter of the ultrasonic treatment instrument may be hindered. In addition, since the balance portion is provided between the proximal end of the treatment portion and the vibration node portion, a sufficient space for forming the balance portion cannot be secured depending on the size of the treatment portion. There is a fear.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide an ultrasonic treatment instrument capable of effectively preventing lateral vibration generated in a treatment section while preventing an increase in diameter. Is to provide.

In order to solve the above problems, an ultrasonic treatment instrument of the present invention includes an ultrasonic vibration generating means for generating ultrasonic vibration, a base end portion connected to the ultrasonic generating means, and a distal end portion with respect to a central axis. An ultrasonic vibration generated by the ultrasonic vibration generating means is transmitted from the base end portion of the vibration transmitting member to the treatment portion at the distal end. . And this ultrasonic treatment tool adjusts the generation amount of torque generated when ultrasonic vibration is transmitted to the asymmetrical shape portion of the vibration transmission member, and transmits the vibration to the torque generation amount adjustment hole for suppressing lateral vibration. The first feature is that the member is provided.
Since the ultrasonic treatment instrument has such a configuration, it is not necessary to form the outer peripheral surface of the vibration transmitting member in a concave-convex shape, so that the diameter of the vibration transmitting member is prevented from being increased. Further, the lateral vibration is effectively prevented by providing the torque generation amount adjusting hole so as to suppress the amount of torque generated due to the presence of the asymmetrical portion at the tip of the vibration transmitting member.

The ultrasonic treatment instrument includes ultrasonic vibration generating means for generating ultrasonic vibration, and a treatment portion having an outer peripheral surface shape other than a circumferential shape with respect to a central axis at a distal end portion, and the supersonic treatment device at the proximal end portion. The ultrasonic vibration generated by the ultrasonic vibration generating means is transmitted from the base end portion to the treatment portion, and the ultrasonic vibration is transmitted from the base end portion to the treatment portion. A second feature is that a vibration transmission member having a torque generation amount adjustment hole for adjusting the amount of torque generated by transmission is provided.
Since the ultrasonic treatment instrument has such a configuration, it is not necessary to form the outer peripheral surface of the vibration transmitting member in a concave-convex shape, so that the diameter of the vibration transmitting member is prevented from being increased. Moreover, lateral vibration is effectively prevented by providing a torque generation amount adjustment hole so as to suppress the amount of torque generated due to the presence of a treatment portion having an asymmetric shape other than the circumferential shape at the tip of the vibration transmitting member. Is done.

A third feature is that the hole is provided in the treatment portion.
Since it has such a structure, the hole which produces the torque which acts on the opposite side with respect to the torque which arises in a treatment part can be provided, and the torque which arises in a vibration transmission member can be suppressed effectively low.

Furthermore, the fourth feature is that the center of gravity of the region in which the hole is provided is arranged on the central axis of the vibration transmitting member.
With such a configuration, it is possible to prevent the vibration transmitting member from being out of balance.

Further, the hole is provided so as to penetrate in a direction orthogonal to the central axis of the vibration transmission member, and at least one region between the torque generation amount adjustment hole and the outer peripheral surface of the vibration transmission member. A fifth feature is that the cross-sectional area is provided so as to change in a direction along the central axis.
Since it has such a structure, the extension amount by ultrasonic vibration changes with the change of the cross-sectional area along the central-axis direction of at least one between the said hole and the outer peripheral surface of the said vibration transmission member. For this reason, if the shape of the hole is selected so that one and the other between the hole and the outer peripheral surface of the vibration transmitting member have different cross-sectional areas, the direction in which the torque is to be applied is consequently obtained. You can choose.

  According to the present invention, it is possible to provide an ultrasonic treatment instrument capable of effectively preventing lateral vibration generated in the treatment portion while preventing an increase in diameter.

The best mode for carrying out the present invention (hereinafter referred to as an embodiment) will be described below with reference to the drawings. First, a first embodiment will be described with reference to FIG.
As shown in FIG. 1A, an ultrasonic treatment instrument 1 includes an ultrasonic transducer unit 3, a vibration transmission member (probe) 5 that transmits ultrasonic vibration generated by the transducer unit 3, and the vibration. And a sheath 7 covering substantially the entire circumference of the transmission member 5.

  On the outer peripheral surface of the cylindrical casing 3 a of the transducer unit 3, an attaching / detaching portion that can be attached to and detached from a fixing portion 7 b to be described later of the sheath 7 is formed. For example, a C-ring or an O-ring is disposed in the detachable portion. In this embodiment, a C-ring 3b is disposed in the attaching / detaching portion.

  The casing 3a of the vibrator unit 3 includes a bolted Langevin type ultrasonic vibrator (not shown) that generates ultrasonic vibration. This ultrasonic vibrator is provided with an output end 9 of the ultrasonic vibrator, a part of which is exposed to the outside from the inside of the casing 3a. From the output end 9, a male screw portion having a male screw cut around its axis protrudes in the direction of the distal end portion of the vibration transmitting member 5. The male screw portion is screwed into a female screw portion, which will be described later, of the base end portion of the vibration transmitting member 5. Therefore, the ultrasonic transducer and the vibration transmission member 5 are detachably fixed.

  This ultrasonic transducer is electrically connected to a drive power supply device (not shown) via a cord 11. Therefore, when the drive power supply device is driven and electric energy is applied to the ultrasonic transducer, the ultrasonic transducer generates a piezoelectric effect and vibrates ultrasonically.

  The base end portion (taper portion 15 described later) of the vibration transmitting member 5 is formed with a female screw portion (not shown) to which the male screw portion described above is screwed. For this reason, the male threaded portion of the shaft protruding from the output end 9 of the ultrasonic transducer of the transducer unit 3 and the female threaded portion of the vibration transmitting member 5 are screwed together. The base end portion of the vibration transmitting member 5 and the one end surface of the output end 9 are in contact (contact) with each other to form a joint portion (contact surface) 13. That is, the ultrasonic transducer of the transducer unit 3 and the vibration transmission member 5 are firmly fixed. Of course, the output end 9 of the ultrasonic transducer and the vibration transmitting member 5 are detachable (separable).

  A taper portion 15 having a smaller diameter toward the distal end side is formed at the base end portion of the vibration transmitting member 5. The tapered portion 15 expands the ultrasonic vibration generated in the ultrasonic vibrator to an amplitude necessary for treating the living tissue. Between the base end portion and the tip end portion of the vibration transmitting member 5, a shaft portion 20 having a circular cross section with the same diameter is formed. A ring-shaped support member 22 is mounted on the outer peripheral surface of the shaft portion 20. The support member 22 is attached to the outer peripheral surface of the shaft portion 20 that becomes the vibration node portion 24 when ultrasonic vibration is transmitted.

  The distal end portion of the vibration transmitting member 5 is formed as a treatment portion 30 that cauterizes, incises, or peels off living tissue. The vibration transmission member 5 is formed of, for example, a titanium alloy material as a member having biocompatibility and rigidity having high vibration transmission properties.

  As shown in FIG. 1B, the treatment portion 30 of the vibration transmitting member 5 is formed in a shape (asymmetric) in which the vertical direction is different from the shaft portion 20. The longitudinal section of the treatment portion 30 is formed in an asymmetric triangle shape with respect to the central axis 32 of the shaft portion 20. The treatment section 30 has an acute angle sandwiched between an upper end surface 30a and an inclined surface (treatment surface) 30b. The treatment portion 30 is formed with a first through hole 34. The first through-hole 34 has a substantially triangular cross section. The first through hole 34 is formed by a surface parallel to the treatment surface 30b, a surface orthogonal to the central axis of the shaft portion 20, and a slope between the upper end surface 30a and the treatment surface 30b. The surface parallel to the treatment surface 30b is disposed at a position close to the treatment surface 30b. A surface orthogonal to the central axis of the shaft portion 20 is disposed at a position close to the shaft portion 20 of the treatment portion 30.

  Further, as shown in FIG. 1C, when the treatment portion 30 is viewed from above, the cylindrical shaft portion 20 is tapered and thinned to a predetermined position, and the tip side is a pair of surfaces. Are formed in parallel to each other. For this reason, the upper end surface 30a and the inclined surface 30b are formed in a rectangular shape. The longitudinal section of the through hole 34 has the same shape from one surface of the pair of surfaces to the other surface.

  In addition, the code | symbol A thru | or code | symbol C shown in FIG. 1 (B) show the surface orthogonal to the longitudinal direction axis | shaft (center axis 32) of the vibration transmission member 5, respectively. Reference symbol A indicates a surface along the base end surface of the through hole 34. Reference numeral B denotes a surface along the tip of the through hole 34. Reference symbol C indicates a surface along the distal end portion of the treatment portion 30. Due to the through-hole 34, the treatment portion 30 is formed in a region ABa where the cross-sectional area perpendicular to the central axis 32 changes between the surfaces A and B from the proximal end portion to the distal end portion of the treatment portion 30, and the central axis 32. And a region ABb having a constant cross-sectional area perpendicular to the region ABb.

  As shown in FIG. 1A, the sheath 7 includes a sheath insertion portion 7 a that covers the vibration transmission member 5 and a fixing portion 7 b that is detachably fixed to the transducer unit 3. The fixing part 7b is formed with a concave attaching / detaching part receiving part 7c for receiving the C-ring 3b disposed in the attaching / detaching part described above. The vibration transmission member 5 and the sheath insertion portion 7a are disposed on the same axis. That is, the central axis of the vibration transmitting member 5 and the central axis of the sheath 7 coincide with each other at the central axis indicated by reference numeral 32.

Next, the operation of such an ultrasonic treatment tool 1 will be described.
When electric energy is supplied from the drive power supply device to the ultrasonic vibrator via the cord 11, the ultrasonic vibrator built in the casing 3a of the vibrator unit 3 is ultrasonically vibrated by the piezoelectric effect. This ultrasonic vibration is transmitted from the proximal end portion (tapered portion 15) of the vibration transmitting member 5 through the shaft portion 20 toward the distal end portion (the treatment portion 30). At this time, the ultrasonic vibration is magnified and transmitted toward the treatment portion 30 by the tapered portion (horn portion) 15 at the base end portion of the vibration transmitting member 5. A support member 22 is disposed on the outer peripheral surface of the vibration node 24 transmitted to the shaft portion 20 of the vibration transmitting member 5. In the ultrasonic treatment instrument 1 according to this embodiment, as shown in FIG. 1B, a vibration node 24 is provided on the proximal end side of the treatment section 30.

  In the treatment section 30 (between the areas AC between the surfaces A and C in FIG. 1B), the vertical direction of the longitudinal axis 32 is asymmetric. For this reason, during the ultrasonic vibration of the vibration transmitting member 5, the torque T1 is generated in the extending direction (vibrating direction) due to the asymmetry of the treatment section 30, and the torque -T1 is generated in the contracting direction.

At the time of ultrasonic vibration of the vibration transmitting member 5, δa is generated in the region ABa between the surfaces A and B whose cross-sectional area changes from large to small. Δb is generated extending in a region ABb between surfaces A and B having a constant cross-sectional area. In the plane A, the amplitudes of the areas ABa and ABb are the same, but in the area ABa, the cross-sectional area changes from large to small as the plane B is approached, and the amplitude is expanded. On the other hand, since the cross-sectional area does not change in the region ABb, the extension δa of the region ABa is larger than the extension δb of the region ABb (δa> δb). For this reason, a torque T2 is generated between the surfaces A and B in the opposite direction to the torque T1. Here, when the longitudinal elastic modulus between the surfaces A and B is E, the cross-sectional secondary moment is I, and the width of the vibration transmission member 5 is W, the torque T2 is
T2 = EI (δa−δb) / W
As approximately.

  For this reason, the torque generated in the vicinity of the treatment section 30 during the ultrasonic vibration of the vibration transmitting member 5 is expressed as T1-T2. At this time, the through hole 34 is formed so that the generated torque (= T1−T2) is canceled (becomes zero), that is, the absolute values of the torques T1 and T2 coincide with each other, and the region ABa, ABb is formed. As a result, no torque is applied to the treatment section 30 or the torque amount can be made extremely small, so that unintended lateral vibration generated in the treatment section 30 is suppressed.

  Further, by providing the treatment portion 30 with the through hole 34, the mass of the treatment portion 30 itself is reduced. For this reason, generation | occurrence | production of an inertia force (torque) is suppressed, ie, the influence of the asymmetry of the treatment part 30 becomes small. If it does so, the torque itself which generate | occur | produces in the treatment part 30 will also become small.

  Then, the vibration transmitting member 5 is vibrated, and the treatment surface 30b of the treatment unit 30 is brought into contact with the living tissue in a state where torque generated in the treatment unit 30 is suppressed. Then, the living tissue is incised or cauterized. Moreover, the operation | movement for moving the ultrasonic treatment tool 1 whole and exfoliating a tissue can be performed.

As described above, according to this embodiment, the following can be said.
The through hole 34 is formed so as to suppress the torque T1 generated in the treatment portion 30 at the tip of the vibration transmitting member 5 to generate a torque T2 in the opposite direction to the torque T1, and the absolute values of the torques T1 and T2 are By forming the through holes 34 so as to coincide with each other, it is possible to suppress the lateral vibration caused by the asymmetrical tip of the vibration transmitting member 5.

  Moreover, since it is not necessary to dent or protrude the outer peripheral surface of the vibration transmission member 5 in order to suppress the generation of torque, it is possible to prevent the vibration transmission member 5 from increasing in diameter. That is, the processing of the vibration transmitting member 5 can be completed only by forming the through hole 34. For this reason, in particular, when the outer peripheral surface of the vibration transmitting member 5 is projected, that is, the workability can be greatly improved compared to the process of cutting around the projecting portion in order to project a part thereof.

  Further, by preventing lateral vibration, the durability of the ultrasonic treatment instrument 1 is increased, and treatment can be stably performed on living tissue.

  Therefore, according to this embodiment, it is possible to effectively prevent the lateral vibration generated in the treatment portion 30 while preventing the vibration transmitting member 5 from increasing in diameter.

  Next, a second embodiment will be described with reference to FIG. This embodiment is a modification of the first embodiment. The same members as those described in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 2, a second through hole 40 is formed in the treatment portion 30 of the ultrasonic treatment instrument 1 according to this embodiment. The second through hole 40 is formed in a substantially rectangular shape in vertical section. The second through-hole 40 is formed by a surface parallel to the treatment surface 30b, a surface orthogonal to the central axis of the shaft portion 20, and two bent inclined surfaces between the upper end surface 30a and the treatment surface 30b. Has been. A surface orthogonal to the central axis of the shaft portion 20 is disposed at a position close to the shaft portion 20 of the treatment portion 30. In this embodiment, in areas DE and EF, which will be described later, the angle with respect to the upper end surface 30a of the treatment section 30 changes from the angle α to the angle β. In this embodiment, the angle α of the region DE is formed larger than the angle β of the region EF.

  Reference numerals D to F shown in FIG. 2 indicate planes orthogonal to the longitudinal axis (center axis 32) of the vibration transmitting member 5, respectively. Reference symbol D indicates a surface along the base end surface of the through hole 40. Reference symbol E indicates a surface at a position where the angle of the through hole 40 changes from the angle α to the angle β. Reference symbol F indicates a surface along the tip of the through hole 40. Due to the through-hole 40, the treatment section 30 has a constant cross-sectional area and regions DE and EF in which the cross-sectional area changes from large to small between the surfaces D and F from the proximal end portion to the distal end portion of the treatment section 30. And a region DF.

  In the ultrasonic treatment instrument 1 according to this embodiment, the vibration node portion 24 is provided on the proximal end side of the treatment portion 30.

Next, the operation of such an ultrasonic treatment tool 1 will be described.
In the treatment portion 30 (between the surfaces D and C in FIG. 2), the treatment portion 30 is asymmetric with respect to the longitudinal axis 32 when the vibration transmitting member 5 is subjected to ultrasonic vibration. For this reason, torque T3 is generated in the extending direction (vibrating direction), and torque -T3 is generated in the contracting direction.

  When the vibration transmitting member 5 is vibrated ultrasonically, δc is generated in the region DE between the surfaces D and F where the cross-sectional area changes from large to small, and δd is generated in the region EF. Δe and δf are generated in the region DF between the surfaces D and F having a constant cross-sectional area.

  In the plane D, the amplitudes of the areas DE and DF are the same, but in the area DE, as the plane E is approached, the cross-sectional area changes from large to small and the amplitude is enlarged. On the other hand, since the cross-sectional area does not change in the region DF, the extension δc of the region DE is larger than the extension δe of the region DF (δc> δe).

  In the plane E, the amplitude of the region EF is larger than that of the region DE in the plane D, and therefore larger than the amplitude of the region DF. In the region EF, as the surface F is approached, the cross-sectional area changes from large to small and the amplitude is expanded. On the other hand, since the cross-sectional area does not change in the region DF, the extension δd of the region EF is larger than the extension δf of the region DF (δd> δf). The extensions δe and δf are the same (δe = δf).

  Therefore, the areas DE and EF have a cross-sectional area that changes from large to small and increases in amplitude from the surface D to the surface F, so that the extension δc and δd of the region DE and the region EF extends the region DF. It becomes larger than δe and δf. Further, the extension δd of the region EF is larger than the extension δc of the region DE (δd> δc> δe = δf). Then, torques T4 and T5 are generated between the surfaces D and F in the opposite direction to the torque T3.

  For this reason, the torque generated in the vicinity of the treatment unit 30 during the ultrasonic vibration of the vibration transmitting member 5 is represented as T3- (T4 + T5). At this time, the generated torque (= T3− (T4 + T5)) is canceled (becomes zero), that is, the torque T3 and the total torque of the torques T4 and T5 are matched so that the absolute values match. A hole 40 is formed, and regions DE, EF, and DF are formed. As a result, no torque is applied to the treatment section 30 or the torque amount can be made extremely small, so that unintended lateral vibration generated in the treatment section 30 is suppressed.

  In this embodiment, the angle α of the region DE, which is the angle of the through hole 40 with respect to the upper end surface 30a of the treatment portion 30, is described as being formed larger than the angle β of the region EF. In addition, the angle α of the region DE may be smaller than the angle β of the region EF (either α> β or β> α may be used).

  Next, a third embodiment will be described with reference to FIG. This embodiment is a modification of the first embodiment. The same members as those described in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 3, third and fourth through holes 42 and 44 are formed in the treatment portion 30 of the ultrasonic treatment instrument 1 according to this embodiment. The third through hole 42 is formed in a substantially parallelogram shape in longitudinal section. The third through hole 42 is formed by two slopes parallel to the slope 30 b and two faces orthogonal to the central axis 32.

  The fourth through-hole 44 has a longitudinal section that is substantially triangular. The third through hole 42 is formed by a surface parallel to the treatment surface 30b, a surface orthogonal to the central axis of the shaft portion 20, and an inclined surface between the upper end surface 30a and the treatment surface 30b. A surface orthogonal to the central axis of the shaft portion 20 is disposed at a position close to the shaft portion 20 of the treatment portion 30.

  These through holes 42 and 44 are arranged side by side along the direction from the proximal end portion of the treatment portion 30 toward the distal end portion. In this embodiment, in the regions GHa and IJa described later, the angle with respect to the upper end surface of the treatment unit 30 changes from the angle α to the angle β. In this embodiment, the angle α of the region GHa is formed larger than the angle β of the region IJa.

  Reference numerals G to J shown in FIG. 3 indicate planes orthogonal to the longitudinal axis (center axis 32) of the vibration transmitting member 5, respectively. Reference numeral G denotes a surface along the base end surface of the through hole 42. Reference numeral H denotes a surface along the tip of the through hole 42. Due to the through-hole 42, the treatment section 30 has a region GHa in which the cross-sectional area changes from large to small between the surfaces G and H as it goes from the proximal end portion to the distal end portion of the treatment portion 30, and a region GHb in which the cross-sectional area is constant. And. Reference numeral I denotes a surface along the base end surface of the through hole 44. A symbol J indicates a surface along the tip of the through hole 44. Due to the through-hole 44, the treatment section 30 has a region IJa in which the cross-sectional area changes from large to small between the surfaces I and J from the base end portion to the distal end portion of the treatment portion 30, and a region IJb in which the cross-sectional area is constant. And.

  In the ultrasonic treatment instrument 1 according to this embodiment, the vibration node portion 24 is provided on the proximal end side of the treatment portion 30.

Next, the operation of such an ultrasonic treatment tool 1 will be described.
The treatment portion 30 (between surfaces G and C in FIG. 3) has asymmetry with respect to the longitudinal axis 32 when the vibration transmitting member 5 is subjected to ultrasonic vibration. For this reason, torque T6 is generated in the extending direction (vibration direction), and torque -T6 is generated in the contracting direction.

  During ultrasonic vibration of the vibration transmitting member 5, δg is generated in the region GHa between the surfaces G and H where the cross-sectional area changes from large to small, and δh is generated in the region IJa. An extension δi occurs in the region GHb between the faces G and H having a constant cross-sectional area, and an extension δj occurs in the region IJb.

  In the plane G, the amplitudes of the regions GHa and GHb are the same, but in the region GHa, the cross-sectional area changes from large to small as the plane H is approached, and the amplitude is expanded. On the other hand, since the cross-sectional area does not change in the region GHb, the extension δg of the region GHa is larger than the extension δi of the region GHb (δg> δi).

  In the plane I, the amplitude of the region IJa is larger than the amplitude of the region GHa in the plane G, and thus is larger than the amplitude of the region IJb. In the region IJa, the cross-sectional area changes from large to small as the surface J is approached, and the amplitude is enlarged. On the other hand, since the cross-sectional area does not change in the region IJb, the extension δh of the region IJa is larger than the extension δj of the region IJb (δh> δj). Since the sectional areas of the regions GHb and IJb are the same, the extensions δi and δj are the same (δi = δj).

  Accordingly, in the regions GHa and IJa, the cross-sectional area is changed from large to small and the amplitude is enlarged from the surface G to the surface H and from the surface I to the surface J, so that the extension δg and δh of the regions GHa and IJa is increased. Becomes larger than the extensions δi and δj of the regions GHb and IJb. Further, the extension δh of the region IJa is larger than the extension δg of the region GHa (δh> δg> δi = δj). Then, torques T7 and T8 are generated between the surfaces G and J in the opposite direction to the torque T3.

  For this reason, the torque generated in the vicinity of the treatment unit 30 during the ultrasonic vibration of the vibration transmitting member 5 is expressed as T6- (T7 + T8). At this time, the generated torque (= T6− (T7 + T8)) is canceled (becomes zero), that is, the torque T6 and the combined torque of the torques T7 and T8 are passed through so that the absolute values match. Holes 42 and 44 are formed, and regions GHa, GHb, IJa, and IJb are formed. As a result, no torque is applied to the treatment section 30 or the torque amount can be made extremely small, so that unintended lateral vibration generated in the treatment section 30 is suppressed.

  Next, a fourth embodiment will be described with reference to FIG. This embodiment is a modification of the first embodiment. The same members as those described in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 4, fifth and sixth through holes 46 and 48 are formed in the treatment portion 30 of the ultrasonic treatment instrument 1 according to this embodiment. These through holes 46 and 48 are juxtaposed in the vertical direction of the treatment section 30. The fifth through hole 46 is formed above the sixth through hole 48. The fifth through hole 46 is formed in a substantially rectangular shape in longitudinal section. The through hole 46 is inclined with respect to the axial direction of the shaft portion 20. This inclination is an angle between the upper end surface 30a and the treatment surface 30b. The sixth through-hole 48 is formed in a substantially triangular shape in longitudinal section. The sixth through hole 48 is formed by a surface parallel to the treatment surface 30b, a surface orthogonal to the central axis of the shaft portion 20, and an inclined surface between the upper end surface 30a and the treatment surface 30b. This inclined surface is closer to the inclination of the treatment surface than the inclination of the fifth through hole 46. The surface parallel to the treatment surface 30b is disposed at a position close to the treatment surface 30b. A surface orthogonal to the central axis of the shaft portion 20 is disposed at a position close to the shaft portion 20 of the treatment portion 30.

  Reference numerals K and L shown in FIG. 4 indicate surfaces orthogonal to the longitudinal axis (center axis 32) of the vibration transmitting member 5, respectively. A symbol K indicates a surface along the base end surface of the through holes 46 and 48. Reference symbol L indicates a surface along the tip of the through holes 46 and 48. A region where the cross-sectional area of the treatment portion 30 changes from the base end portion of the treatment portion 30 to the distal end portion between the surfaces K and L depending on the space between the through hole 46 and the upper end surface 30a of the treatment portion 30. KLa is provided. Between the lower end surface of the through-hole 46 and the upper end surface 30a of the through-hole 48, the treatment section 30 has a cross-sectional area between the surfaces K and L that increases from small to large as it goes from the proximal end portion to the distal end portion of the treatment portion 30. A changing region KLb is provided. Depending on the space between the through hole 48 and the treatment surface 30b of the treatment portion 30, the treatment portion 30 includes a region KLc having a constant cross-sectional area between the surfaces K and L from the proximal end portion to the distal end portion of the treatment portion 30. ing.

  In the ultrasonic treatment instrument 1 according to this embodiment, the vibration node portion 24 is provided on the proximal end side of the treatment portion 30.

Next, the operation of such an ultrasonic treatment tool 1 will be described.
The treatment portion 30 (between the surfaces K and C in FIG. 4) has asymmetry of the treatment portion 30 with respect to the longitudinal axis 32 when the vibration transmitting member 5 is vibrated ultrasonically. For this reason, torque T9 is generated in the extending direction (vibration direction), and torque -T9 is generated in the contracting direction.

  At the time of ultrasonic vibration of the vibration transmitting member 5, δk is generated extending in the region KLa between the surfaces K and L where the cross-sectional area changes from large to small. Δm is generated in the region KLb between the surfaces K and L where the cross-sectional area changes from large to small. Δn is generated extending in a region KLc between the surfaces K and L having a constant cross-sectional area.

  In the plane K, the amplitudes of the regions KLa, KLb, and KLc are the same, but in the regions KLa and KLb, as the plane L is approached, the cross-sectional area changes from large to small and the amplitude is expanded. On the other hand, since the cross-sectional area does not change in the region KLc, the extensions δk and δm of the regions KLa and KLb are larger than the extension δn of the region KLc.

  Further, the rate of area decrease on the surface L based on the area of the region KLa on the surface K is larger than the rate of area decrease on the surface L based on the area of the region KLb on the surface K. For this reason, the extension δk of the region KLa is larger than the extension δm of the region KLb (δk> δm> δn). Then, torques T10 and T11 are generated between the surfaces K and L in the opposite direction to the torque T9.

  For this reason, the torque generated in the vicinity of the treatment unit 30 during the ultrasonic vibration of the vibration transmitting member 5 is expressed as T9− (T10 + T11). At this time, the generated torque (= T9− (T10 + T11)) is canceled (becomes zero), that is, the torque T9 and the combined torque of the torques T10 and T11 are passed through so that the absolute values match. Holes 46 and 48 are formed, and regions KLa, KLb, and KLc are formed. As a result, no torque is applied to the treatment section 30 or the torque amount can be made extremely small, so that unintended lateral vibration generated in the treatment section 30 is suppressed.

  Next, a fifth embodiment will be described with reference to FIG. This embodiment is a modification of the first embodiment. The same members as those described in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 5, a first through hole 34 is formed in the treatment portion 30 of the ultrasonic treatment instrument 1 according to this embodiment. A seventh through hole 50 is formed in the shaft portion 20 of the vibration transmitting member 5. The seventh through hole 50 has a vertical cross section formed in a substantially triangular shape. The seventh through hole 50 is formed by, for example, a surface parallel to the treatment surface 30b, a surface orthogonal to the central axis of the shaft portion 20, and a surface parallel to the upper end surface 30a. Further, the surface parallel to the upper end surface 30a is disposed at a position separated from the upper end surface 30a. A surface orthogonal to the central axis of the shaft portion 20 is disposed at a position close to the treatment portion 30 of the treatment portion 30.

  Reference numerals M and N shown in FIG. 5 indicate surfaces orthogonal to the longitudinal axis (center axis 32) of the vibration transmitting member 5, respectively. A symbol M indicates a surface along the base end portion of the through hole 50. A symbol N indicates a surface along the front end surface of the through hole 50. Due to the through-hole 50, the shaft portion 20 has a region MNa in which the cross-sectional area changes from large to small between the surfaces M and N as it goes from the base end portion to the tip end portion of the shaft portion 20, and a region MNb in which the cross-sectional area becomes constant. And.

  In addition, there is a vibration node 24 on the proximal end side of the treatment portion 30, and this node 24 is closer to the treatment portion 30 than the seventh through hole 50. That is, in the ultrasonic treatment instrument 1 according to this embodiment, the vibration node 24 is provided between the first and seventh through holes 34 and 50.

Next, the operation of such an ultrasonic treatment tool 1 will be described.
The treatment section 30 (between surfaces A and C in FIG. 5) has asymmetry of the treatment section 30 with respect to the longitudinal axis 32 when the vibration transmitting member 5 is vibrated ultrasonically. For this reason, torque T12 is generated in the extending direction (vibration direction), and torque -T12 is generated in the contracting direction.

  At the time of ultrasonic vibration of the vibration transmitting member 5, δa is generated in the region ABa between the surfaces A and B where the cross-sectional area changes from large to small. Δb is generated extending in a region ABb between surfaces A and B having a constant cross-sectional area. In the region ABa, the cross-sectional area is changed from large to small and the amplitude is expanded, so that the extension δa of the region ABa is larger than the extension δb of the region ABb (δa> δb). Therefore, a torque T13 is generated between the surfaces A and B in the opposite direction to the torque T12.

  Further, during the ultrasonic vibration of the vibration transmitting member 5, δp is generated in the region MNa between the surfaces M and N where the cross-sectional area changes from large to small. Δq is generated extending in a region MNb between the surfaces M and N having a constant cross-sectional area.

  In the surface M, the amplitudes of the regions MNa and MNb are the same, but in the region MNa, the cross-sectional area changes from large to small as the surface N is approached, and the amplitude is expanded. On the other hand, since the cross-sectional area does not change in the region MNb, the extension δp of the region MNa is larger than the extension δq of the region MNb (δp> δq). Then, a torque T14 is generated between the surfaces M and N in the opposite direction to the torque T12.

  For this reason, the torque generated in the vibration transmission member 5 during the ultrasonic vibration of the vibration transmission member 5 is expressed as T12− (T13 + T14). At this time, the generated torque (= T12− (T13 + T14)) is canceled (becomes zero), that is, the torque T12 and the combined torque of the torques T13 and T14 are passed through so that the absolute values match. Holes 34 and 50 are formed, and regions ABa, ABb, MNa, and MNb are formed. As a result, no torque is applied to the vibration transmission member 5 or the amount of torque can be made extremely small, so that the occurrence of unintended lateral vibration in the vibration transmission member 5 is suppressed. Since torque is not applied to the vibration transmission member 5 or the torque amount can be made extremely small, it can be said that no torque is applied to the treatment unit 30 or the torque amount can be made extremely small. The occurrence of unintended lateral vibration in the portion 30 is suppressed.

  Next, a sixth embodiment will be described with reference to FIG. The configuration of the ultrasonic treatment instrument 1 according to this embodiment is substantially the same as that of the ultrasonic treatment instrument 1 described in the first embodiment. In this embodiment, five examples will be described with reference to a through hole for adjusting the amount of torque applied to the vibration transmitting member 5 of the ultrasonic treatment instrument 1 during ultrasonic vibration. One to eighth through twelfth through holes 52, 54, 56, 58, and 60 are formed in the shaft portion 20 of the ultrasonic treatment instrument 1 according to this embodiment.

  As shown in FIG. 6A, an eighth through hole 52 is formed in the shaft portion 20 that is symmetrical in the vertical direction with respect to the central shaft 32 of the vibration transmitting member 5. The eighth through hole 52 has a longitudinal section formed in a substantially triangular shape. The eighth through hole 52 includes a surface parallel to the upper end surface 30a, a surface orthogonal to the central axis 32 of the shaft portion 20, and a lower side from the upper side toward the distal end portion side of the shaft portion 20. And a surface having an oblique inclination on the side. The surface parallel to the upper end surface 30a is disposed at a position separated from the upper end surface 30a. A surface orthogonal to the central axis 32 of the shaft portion 20 is disposed at a position separated from the treatment portion 30.

  Reference sign P and reference sign Q shown in FIG. 6A indicate planes orthogonal to the longitudinal axis (center axis 32) of the vibration transmitting member 5, respectively. Reference symbol P denotes a surface along the base end surface of the through hole 52. Reference sign Q indicates a surface along the tip of the through hole 52. Due to the through hole 52, the shaft portion 20 has a region PQa in which the cross-sectional area changes from small to large between the surfaces P and Q from the base end portion to the tip end portion of the shaft portion 20, and a region PQb in which the cross-sectional area is constant. And.

  The vibration node 24 is provided on the base end side of the through hole 52.

Next, the operation of such an ultrasonic treatment tool 1 will be described.
At the time of ultrasonic vibration of the vibration transmitting member 5, δ11 is generated extending in a region PQa between the planes P and Q where the cross-sectional area changes from small to large toward the antinode of the vibration away from the vibration node 24. . Δ12 is generated extending in a region PQb between the surfaces P and Q having a constant cross-sectional area.

  In the plane P, the amplitudes of the regions PQa and PQb are the same, but in the region PQa, the cross-sectional area changes from small to large as the plane Q is approached, and the amplitude is reduced. On the other hand, since the cross-sectional area does not change in the region PQb, the extension δ11 of the region PQa is smaller than the extension δ12 of the region PQb (δ11 <δ12). For this reason, a torque T15 in the same direction as the torque T1 described in the first embodiment is generated between the surfaces P and Q.

  Torque T15 can adjust the torque generated by the through holes formed at other positions of the treatment section 30 and the shaft section 20.

  As shown in FIG. 6B, a ninth through hole 54 is formed in the shaft portion 20 that is symmetrical in the vertical direction with respect to the central shaft 32 of the vibration transmitting member 5. The ninth through-hole 54 has a longitudinal section that is substantially triangular. The ninth through hole 54 includes a surface parallel to the upper end surface 30a, a surface orthogonal to the central axis 32 of the shaft portion 20, and a lower side from the proximal end side to the distal end portion side of the shaft portion 20. And a surface having an oblique inclination on the upper side. The surface parallel to the upper end surface 30a is disposed at a position separated from the upper end surface 30a. A surface orthogonal to the central axis 32 of the shaft portion 20 is disposed at a position close to the treatment portion 30.

  Reference sign R and reference sign S shown in FIG. 6B indicate surfaces orthogonal to the longitudinal axis (center axis 32) of the vibration transmitting member 5. The symbol R indicates a surface along the base end portion of the through hole 54. Reference numeral S denotes a surface along the tip surface of the through hole 54. Due to the through hole 54, the shaft portion 20 has a region RSa in which the cross-sectional area changes from large to small between the surfaces R and S as it goes from the base end portion to the tip portion of the shaft portion 20, and a region RSb in which the cross-sectional area becomes constant. And.

  The vibration node 24 is provided on the base end side of the through hole 54.

Next, the operation of such an ultrasonic treatment tool 1 will be described.
During ultrasonic vibration of the vibration transmitting member 5, δ 21 is generated extending in the region RSa between the surfaces R and S where the cross-sectional area changes from small to large in the antinode direction of the vibration away from the vibration node 24. . Δ22 is generated extending in the region RSb between the surfaces R and S having a constant cross-sectional area.

  In the surface R, the amplitudes of the regions RSa and RSb are the same, but in the region RSa, the cross-sectional area changes from large to small as the surface S is approached, and the amplitude is enlarged. On the other hand, since the cross-sectional area does not change in the region RSb, the extension δ21 of the region RSa is larger than the extension δ22 of the region RSb (δ21> δ22). For this reason, a torque T16 in the opposite direction to the torque T1 described in the first embodiment is generated between the surfaces R and S.

  Torque T16 can adjust the torque generated by the through holes formed at other positions of the treatment section 30 and the shaft section 20.

  As shown in FIG. 6C, a tenth through hole 56 is formed in the shaft portion 20 that is symmetrical in the vertical direction with respect to the central shaft 32 of the vibration transmitting member 5. The tenth through hole 56 has the same shape as the eighth through hole 52 shown in FIG.

  Reference sign U and reference sign V shown in FIG. 6C indicate surfaces orthogonal to the longitudinal axis (center axis 32) of the vibration transmitting member 5. Reference symbol U denotes a surface along the base end surface of the through hole 56. Reference sign V indicates a surface along the tip of the through hole 56. Due to the through hole 56, the shaft portion 20 has a constant cross-sectional area and regions UVa1 and UVa2 in which the cross-sectional area changes from small to large between the surfaces U and V from the base end portion to the tip end portion of the shaft portion 20. Regions UVb1 and UVb2 are provided.

  The vibration node 24 is on the central axis of the shaft 20 and between the surfaces U and V. That is, the vibration node 24 is inside the through hole 56.

  Next, the operation of such an ultrasonic treatment tool 1 will be described.

  At the time of ultrasonic vibration of the vibration transmitting member 5, -δ31 is generated in the region UVa1 between the surfaces U and V where the cross-sectional area changes from small to large in the direction away from the vibration node 24. The sign of this extension is that the vibration node 24 is on the center plane between the surfaces U and V, and the region UVa1 is closer to the base end side of the shaft portion 20 than the vibration node 24. Further, + δ32 is generated in the region UVa2 between the surfaces U and V. The sign + of this extension is due to the fact that the vibration node 24 is on the center surface of the surfaces U and V, and the region UVa2 is closer to the tip of the shaft portion 20 than the vibration node 24.

  -Δ33 is generated extending in the region UVb1 between the surfaces U and V having a constant cross-sectional area. The sign of this extension is that the vibration node 24 is on the center surface of the surfaces U and V, and the region UVb1 is closer to the base end side of the shaft portion 20 than the vibration node 24. Further, + δ34 extends in the region UVb2 between the surfaces U and V. The sign + of this extension is due to the fact that the vibration node 24 is on the center surface of the surfaces U and V, and the region UVb2 is closer to the tip of the shaft portion 20 than the vibration node 24.

  That is, in the surface having the vibration node 24, the amplitudes of the regions UVa1 and UVb1 are the same, but in the region UVa1, the cross-sectional area changes from large to small as the surface U is approached, and the amplitude is expanded. On the other hand, since the cross-sectional area does not change in the region UVb1, the absolute value of the extension −δ31 of the region UVa1 is larger than the absolute value of the extension −δ33 of the region UVb1 (| δ31 |> | δ33 |).

  In the surface having the vibration node 24, the amplitudes of the regions UVa2 and UVb2 are the same, but in the region UVa2, the cross-sectional area changes from small to large as the surface V is approached, and the amplitude is reduced. On the other hand, since the cross-sectional area does not change in the region UVb2, the absolute value of the extension δ32 of the region UVa2 is smaller than the absolute value of the extension δ34 of the region UVb2 (| δ32 | <| δ34 |).

  Since the sectional areas of the regions UVb1 and UVb2 are the same, the absolute values of the extensions −δ33 and + δ34 are the same (| δ33 | = | δ34 |).

  Therefore, comparing the magnitudes of the absolute values of the extension −δ31 of the region UVa1, the extension + δ32 of the region UVa2, and the extension + δ34 (−δ33) of the regions UVb1 and UVb2, the extension δ31 of the region UVa1 is the largest, and then the region UVb1 , UVb2 has the largest extension δ34, and the region UVa2 has the smallest extension δ32 (| δ31 |> | δ33 | = | δ34 |> | δ32 |).

  Then, a torque T18 in a direction opposite to the torque T1 described in the first embodiment is generated between the surfaces U and V.

  Torque T18 can adjust the torque generated by the through holes formed at other positions of the treatment portion 30 and the shaft portion 20.

  As shown in FIG. 6D, an eleventh through hole 58 is formed in the shaft portion 20 that is symmetrical in the vertical direction with respect to the central shaft 32 of the vibration transmitting member 5. The eleventh through-hole 58 has a substantially elliptical longitudinal section. The through hole 58 is inclined with respect to the central axis 32 of the shaft portion 20. The through hole 58 has a pair of parallel surfaces having an oblique inclination from the upper side to the lower side from the proximal end side to the distal end side of the shaft portion 20.

  Reference sign W and reference sign X shown in FIG. 6D indicate surfaces orthogonal to the longitudinal axis (center axis 32) of the vibration transmitting member 5. A symbol W indicates a surface along the vicinity of the base end portion of the through hole 58. A symbol X indicates a surface along the vicinity of the tip of the through hole 58. Due to the through hole 58, the shaft portion 20 changes from the base end portion of the shaft portion 20 toward the tip portion, a region WXa where the cross-sectional area changes from small to large between the surfaces W and X, and the cross-sectional area changes from large to small. Region WXb to be used.

  The vibration node 24 is provided on the base end side of the through hole 58.

Next, the operation of such an ultrasonic treatment tool 1 will be described.
At the time of ultrasonic vibration of the vibration transmitting member 5, a δ 41 is generated extending in a region WXa between the surfaces W and X in which the cross-sectional area changes from small to large toward the antinode of the vibration away from the vibration node 24. . Δ42 is generated in the region WXb between the surfaces W and X where the cross-sectional area changes from large to small.

  In the surface W, the amplitudes of the regions WXa and WXb are the same, but in the region WXa, the cross-sectional area changes from small to large as the surface X is approached, and the amplitude is reduced. On the other hand, in the region WXb, the cross-sectional area changes from large to small, and the amplitude is expanded. For this reason, the extension δ41 of the region WXa is smaller than the extension δ42 of the region WXb (δ41 <δ42). Then, a torque T18 in the opposite direction to the torque T1 described in the first embodiment is generated between the surfaces W and X.

  Torque T18 can adjust the torque generated by the through holes formed at other positions of the treatment portion 30 and the shaft portion 20.

  As shown in FIG. 6E, a twelfth through hole 60 is formed in the shaft portion 20 that is symmetrical in the vertical direction with respect to the central shaft 32 of the vibration transmitting member 5. The twelfth through hole 60 has the same shape as the eleventh through hole 58 shown in FIG.

  Reference sign Y and reference sign Z shown in FIG. 6 (E) indicate surfaces orthogonal to the longitudinal axis (center axis 32) of the vibration transmitting member 5, respectively. Reference Y indicates a surface along the vicinity of the base end portion of the through hole 60. Reference sign Z indicates a surface along the vicinity of the tip of the through hole 60. Due to the through-hole 60, the shaft portion 20 has regions YZa1 and YZa2 in which the cross-sectional area changes from small to large between the surfaces Y and Z from the base end portion to the tip end portion of the shaft portion 20, and the cross-sectional area increases from small to large. Regions YZb1 and YZb2 that change into two.

  The vibration node 24 is on the central axis of the shaft 20 and between the surfaces Y and Z. That is, the vibration node 24 is inside the through hole 60.

  Next, the operation of such an ultrasonic treatment tool 1 will be described.

  At the time of ultrasonic vibration of the vibration transmitting member 5, -δ51 is generated extending in the region YZa1 between the planes Y and Z where the cross-sectional area changes from small to large in the direction away from the vibration node 24. The sign of this extension is that the vibration node 24 is on the center surface of the surfaces Y and Z, and the region YZa1 is closer to the proximal end portion of the shaft portion 20 than the vibration node 24. Further, + δ52 is generated extending in the region YZa2 between the surfaces Y and Z. The sign + of this extension is due to the fact that the vibration node 24 is on the center surface of the surfaces Y and Z, and the region YZa2 is closer to the tip of the shaft portion 20 than the vibration node 24.

  -Δ53 occurs in the region YZb1 between the surfaces Y and Z where the cross-sectional area changes from large to small. The sign of this extension is that the vibration node 24 is on the center surface of the surfaces Y and Z, and the region YZb1 is closer to the base end side of the shaft portion 20 than the vibration node 24. Further, + δ54 is generated in the region YZb2 between the surfaces Y and Z. The sign + of this extension is due to the fact that the vibration node 24 is on the center surface of the surfaces Y and Z, and the region YZb2 is closer to the tip of the shaft portion 20 than the vibration node 24.

  That is, in the surface having the vibration node 24, the amplitudes of the regions YZa1 and YZb2 are the same, but in the region YZa1, the cross-sectional area changes from large to small as the surface Y is approached, and the amplitude is expanded. On the other hand, in the region YZb1, since the sectional area is changed from small to large and the amplitude is reduced, the absolute value of the extension −δ51 of the region YZa1 is larger than the absolute value of the extension −δ53 of the region YZb1 (| δ51). |> | Δ53 |).

  In the surface having the vibration node 24, the amplitudes of the regions YZa2 and YZb2 are the same, but in the region YZa2, the cross-sectional area changes from small to large as the surface Z is approached, and the amplitude is reduced. On the other hand, in the region YZb2, the cross-sectional area changes from large to small and the amplitude is expanded. For this reason, the absolute value of the extension δ52 of the region YZa2 is smaller than the absolute value of the extension δ54 of the region YZb2 (| δ52 | <| δ54 |).

  Since the cross-sectional areas of the regions YZa1 and YZb2 are the same, the absolute values of the extensions −δ51 and + δ54 are the same (| δ51 | = | δ54 |). Since the cross-sectional areas of the regions YZa2 and YZb1 are the same, the absolute values of the extensions + δ52 and −δ53 are the same (| δ52 | = | δ53 |).

  Therefore, when the magnitudes of the absolute values of the extension −δ51 of the region YZa1, the extension + δ52 of the region YZa2, the extension −δ53 of the region YZb1 and the extension + δ54 of the region YZb2 are compared, the absolute values of the extensions −δ51 and + δ54 of the regions YZa1 and YZb2 are compared. The value becomes larger than the absolute values of the extensions + δ52 and −δ53 of the regions YZa2 and YZb1 (| δ51 | = | δ54 |> | δ52 | = | δ53 |).

  Then, a torque T19 in the same direction as the torque T1 described in the first embodiment is generated between the surfaces Y and Z.

  Torque T19 can adjust the torque generated by the through holes formed at other positions of the treatment section 30 and the shaft section 20.

  In the first to sixth embodiments described above, the shape of the treatment portion 30 has been described as a triangle. However, the shape is not limited to this shape as long as the top and bottom are asymmetric with respect to the central axis.

  Although several embodiments have been specifically described so far with reference to the drawings, the present invention is not limited to the above-described embodiments, and all the embodiments performed without departing from the scope of the invention are not limited thereto. Including embodiments.

  According to the above description, the following matters can be obtained. Combinations of the terms are also possible.

[Appendix]
(Additional Item 1) In an ultrasonic treatment instrument that performs a surgical treatment using ultrasonic vibration,
Ultrasonic vibration generating means for generating ultrasonic vibration;
A vibration transmission member that includes a treatment unit for treating a subject, and that is connected to the ultrasonic vibration generation unit so as to be able to transmit the ultrasonic vibration to the treatment unit;
An ultrasonic treatment instrument comprising: at least one hole provided in the vibration transmission member for changing a bending stress of the vibration transmission member generated by the ultrasonic vibration.

(Additional Item 2) In an ultrasonic treatment instrument for performing surgical treatment by ultrasonic vibration,
A vibration transmitting member that transmits ultrasonic vibration to a terminal for treatment;
A treatment portion in which the vibration transmitting member has an asymmetric shape;
At least one hole, and in a region where the hole is provided, the displacement in the vibration direction of the portion substantially parallel to the longitudinal axis of the vibration transmitting member divided by the hole is different. It is characterized by being.

    (Additional Item 3) The ultrasonic treatment instrument according to Additional Item 1 or Additional Item 2, wherein the hole is provided in the treatment portion.

    (Additional Item 4) The ultrasonic treatment instrument according to Additional Item 1 or Additional Item 2, wherein the center of gravity of the region in which the hole is provided is on the longitudinal axis of the vibration transmitting member.

The ultrasonic treatment tool concerning a 1st embodiment is shown, (A) is a fragmentary sectional view showing the whole composition, (B) is a longitudinal section of a treatment part, (C) is (B). The top view of the treatment part which looked at the treatment part from the code | symbol 1C direction shown in FIG. The longitudinal cross-sectional view of the treatment part in the ultrasonic treatment tool concerning 2nd Embodiment. The longitudinal cross-sectional view of the treatment part in the ultrasonic treatment tool concerning 3rd Embodiment. The longitudinal cross-sectional view of the treatment part in the ultrasonic treatment tool concerning 4th Embodiment. The longitudinal cross-sectional view of the treatment part and axial part in the ultrasonic treatment tool concerning 5th Embodiment. (A) thru | or (E) is a schematic longitudinal cross-sectional view which shows the positional relationship of the through-hole provided in the axial part in the ultrasonic treatment tool concerning 6th Embodiment, and the node part of a vibration.

Explanation of symbols

  A, B, C ... surface, AC, ABa, ABb ... area, T1, T2 ... torque, 1 ... ultrasonic treatment tool, 3 ... ultrasonic transducer unit, 5 ... vibration transmission member, 9 ... code, 11 ... output End, 13 ... Joint portion, 15 ... Tapered portion, 20 ... Shaft portion, 22 ... Support member, 24 ... Node portion, 30 ... Treatment portion, 30a ... Upper end surface, 30b ... Treatment surface, 32 ... Central axis, 34 ... Penetration Hole

Claims (5)

  1. Ultrasonic vibration generating means for generating ultrasonic vibration;
    A proximal end portion coupled to the ultrasonic vibration generating means, and an elongated vibration transmitting member having a treatment portion asymmetrically formed with respect to the central axis at the distal end portion,
    In the ultrasonic treatment instrument that transmits the ultrasonic vibration generated by the ultrasonic vibration generating means from the proximal end portion of the vibration transmitting member to the treatment portion at the distal end,
    An ultrasonic treatment tool, wherein a torque generation amount adjustment hole for adjusting a generation amount of torque generated when ultrasonic vibration is transmitted to the treatment portion and suppressing lateral vibration is provided in the vibration transmission member.
  2. Ultrasonic vibration generating means for generating ultrasonic vibration;
    The distal end portion is provided with a treatment portion having an outer peripheral surface shape other than the circumferential shape with respect to the central axis, and is connected to the ultrasonic wave generating means at the base end portion, and generates ultrasonic vibration generated by the ultrasonic vibration generating means. A vibration transmitting member that transmits the proximal end portion toward the treatment portion;
    An ultrasonic wave characterized by comprising: a torque generation amount adjustment hole provided in the vibration transmission member, for adjusting an amount of torque generated when ultrasonic vibration is transmitted from the base end portion toward the treatment portion. Treatment tool.
  3.   The ultrasonic treatment device according to claim 1, wherein the torque generation amount adjustment hole is provided in a treatment portion of the vibration transmission member.
  4.   The ultrasonic wave according to any one of claims 1 to 3, wherein a center of gravity of a region where the torque generation amount adjusting hole is provided is disposed on a central axis of the vibration transmitting member. Treatment tool.
  5.   The torque generation amount adjustment hole is provided so as to penetrate in a direction orthogonal to the central axis of the vibration transmission member, and at least one between the torque generation amount adjustment hole and the outer peripheral surface of the vibration transmission member The ultrasonic treatment device according to any one of claims 1 to 4, wherein a cross-sectional area of the region is provided so as to change in a direction along the central axis.
JP2003310371A 2003-09-02 2003-09-02 Ultrasonic treating instrument Withdrawn JP2005074088A (en)

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