JP2004305587A - Ultrasonic treating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ultrasonic treating apparatus which enables to accurately support an ultrasonic probe at a position of making a node of vibration thereof along with easier rinsing. <P>SOLUTION: In the ultrasonic probe 9 (oscillation transmission member), the base end side of which is linked to an ultrasonic vibrator to transmit the ultrasonic vibration to a treating part 41f at the tip thereof, flange parts are provided at the positions corresponding to both ends of ring like support members 71a to 71c made of a resin so as to get the support members securely positioned on the outer peripheral surface thereof at the position of making the node of the vibration by press fitting or the like. The mounting of the support members 71a to 71c can be done easily, for example, by reducing the outer diameter thereof as they approach the node position closer to the tip side of the probe while the deformation of the support members 71a to 71c is decreased during the assembling period. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an ultrasonic treatment apparatus that performs ultrasonic treatment such as incision, excision, or coagulation of a living tissue while grasping the living tissue.
[0002]
[Prior art]
In general, an ultrasonic treatment apparatus performs ultrasonic treatment such as incision, excision, or coagulation on a living tissue.
Such an ultrasonic treatment apparatus includes, for example, an ultrasonic vibrator provided at an operation unit on the hand side, and transmits ultrasonic vibration generated by the ultrasonic vibrator to treat living tissue. An ultrasonic probe is provided on the distal end side.
[0003]
In addition, the ultrasonic treatment apparatus is provided with a jaw rotatably supported opposite to the distal end of the ultrasonic probe. In the ultrasonic treatment apparatus, a movable handle for opening and closing the jaw with respect to the ultrasonic probe is provided in the operation unit, and an operation rod for transmitting an operation force from the movable handle to the jaw is provided in the axial direction. It is inserted so that it can advance and retreat.
[0004]
In the ultrasonic treatment apparatus, the operation rod moves forward and backward in the axial direction with the operation of the movable handle, and the ultrasonic operation is performed by closing the jaw with respect to the ultrasonic probe in conjunction with the movement of the operation rod. The living tissue is grasped between the probe and the jaw.
Subsequently, in this state, the ultrasonic treatment apparatus transmits ultrasonic vibrations from the ultrasonic transducer to the ultrasonic probe, thereby performing ultrasonic waves such as incision, excision, or coagulation on the grasped living tissue. The treatment is applied.
[0005]
For example, in Japanese Patent Application Laid-Open No. 2000-296133, an operating rod is disposed in a rod channel, and an ultrasonic probe is disposed in a probe channel, respectively, so that they can be individually washed.
In this conventional example, cylindrical spacers are provided at two locations near the tip of the probe channel to suppress the tip of the ultrasonic probe from being elastically deformed when a portion to be treated is gripped by the jaw and the probe. .
[0006]
[Patent Document 1]
JP 2000-296133 A
[0007]
[Problems to be solved by the invention]
However, in the ultrasonic treatment apparatus described in Japanese Patent Application Laid-Open No. 2000-29613, since a cylindrical spacer is provided on the inner peripheral surface of the channel, a stepped portion is formed on the distal end side of the inner periphery of the channel, and cleaning is performed. There is a disadvantage that the procedure becomes complicated.
In addition, since a cylindrical spacer is provided on the channel side, if an error in the length of the probe and an error in the length of the insertion portion of the handle unit are synergized, an accurate position at the node of the vibration of the ultrasonic probe can be obtained. Difficult to support.
[0008]
(Object of the invention)
The present invention has been made in view of these circumstances, and it is an object of the present invention to provide an ultrasonic treatment apparatus that can be easily cleaned and can be accurately supported at a position that is a node of vibration of an ultrasonic probe. .
[0009]
[Means for Solving the Problems]
An ultrasonic vibrator for generating ultrasonic vibration,
An ultrasonic probe connected to the ultrasonic transducer and transmitting ultrasonic vibration,
A channel through which the ultrasonic probe is inserted,
A jaw rotatably supported at the distal end of the channel, for grasping a living tissue between the distal end of the ultrasonic probe,
An operation rod that is provided along the channel, transmits an operation force by an operation unit on a hand side, and rotates the jaw;
With
By attaching an annular support member to almost all positions that are nodes of vibration of the ultrasonic probe and supporting it so that vibration can be transmitted in the channel, it is not necessary to provide a spacer on the channel side to facilitate washing. Further, the ultrasonic probe is accurately supported at a position that is a node of vibration, so that the treatment function by ultrasonic waves can be improved.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First Embodiment)
1 to 5 relate to a first embodiment of the present invention, FIG. 1 is an overall configuration diagram showing an ultrasonic treatment apparatus according to the first embodiment of the present invention, and FIG. 2 is an apparatus main body of FIG. 3 is a side view showing a disassembled state of the ultrasonic treatment device of FIG. 1, FIG. 4 is a side view showing an assembled state of the entire ultrasonic treatment device of FIG. 1, and FIG. FIG. 6 is a cross-sectional view showing the configuration of the treatment section on the distal end side of the treatment tool. FIG. 6 is a side view of an ultrasonic probe provided with an annular support member.
[0011]
As shown in FIG. 1, in an ultrasonic treatment apparatus 1 according to the present embodiment, an ultrasonic treatment instrument 2 for performing a treatment by ultrasonic waves and a foot switch 3 for turning on / off an ultrasonic output are connected to the apparatus main body 1A. It is composed.
In the ultrasonic treatment instrument 2, a treatment section 5 is provided at a distal end of an elongated sheath-shaped outer tube 4 of an insertion section, and an operation section 6 for performing operation at a hand side is provided at a base end. Here, an operation unit 6 has a built-in ultrasonic vibrator (not shown) for generating ultrasonic vibration, and extends downward on the outer peripheral surface, and is operated by an operator to operate the treatment unit 5 while holding the operation unit 5. 8 are provided.
[0012]
Further, the insertion portion mantle tube 4 has a vibration transmitting member or an ultrasonic probe (hereinafter simply abbreviated as a probe) 9 having a vibration transmitting function of transmitting the ultrasonic vibration from the ultrasonic vibrator to the treatment portion 5 therein. Is inserted. The distal end of the probe 9 is exposed to the outside from the distal end of the insertion portion outer tube 4.
The operation panel 12 is provided on the front of the apparatus main body 1A. The operation panel 12 is provided with a power switch 13, an operation display panel 14, and an ultrasonic treatment instrument connection unit 15. Here, one end of the handpiece cord 16 is connected to the operation unit 6 of the ultrasonic treatment instrument 2. The handpiece plug 17 provided at the other end of the handpiece cord 16 is detachably connected to the ultrasonic treatment instrument connecting portion 15 of the apparatus main body 1A.
[0013]
The operation display panel 14 of the apparatus main body 1A includes a setting switch 18 for setting the magnitude of the ultrasonic output during normal operation when performing the ultrasonic treatment, and a magnitude of the ultrasonic output set by the setting switch 18. And a display unit 19 for digitally displaying the result. The setting switch 18 is provided with an output increase switch 18a for changing (increase / decrease) the magnitude of the ultrasonic output and an output decrease switch 18b.
[0014]
Further, as shown in FIG. 2, the apparatus main body 1A includes a drive circuit 20 for supplying electric energy to and driving the ultrasonic vibrator in the ultrasonic treatment instrument 2.
The drive circuit 20 includes an oscillation circuit 21 that generates an AC signal having an ultrasonic frequency, a D / A converter 22 that generates an analog signal that defines the magnitude of an ultrasonic output, and a signal from the D / A converter 22. For example, a VCA circuit 23 that controls the magnitude of an AC signal of the oscillation circuit 21 based on the power supply, and a power amplifier that amplifies the output of the VCA circuit 23 and generates power for driving the ultrasonic transducer in the ultrasonic treatment instrument 2 24, a relay 25 for turning on and off the output line of the drive circuit 20, a control circuit 26 for controlling the operation of the ultrasonic treatment apparatus 1, and an interface for transmitting an operation signal from the foot switch 3 to the control circuit 26 and the relay 25 (I / F) circuit 27 is provided.
[0015]
At the start of the ultrasonic treatment by operating the foot switch 3, the control circuit 26 outputs the ultrasonic output from the ultrasonic transducer in the ultrasonic treatment instrument 2 from the output value set by the setting switch 18 (of the operation display panel 14). Operating state switching means for controlling the ultrasonic output from the ultrasonic vibrator to the set output value at the time when a predetermined time set in advance has elapsed after the start of the ultrasonic treatment is incorporated. ing. In addition, the relay 25 of the drive circuit 20 is interposed between the ultrasonic treatment instrument connection unit 15 and the power amplifier 24.
[0016]
The ultrasonic treatment device 2 can be disassembled into three units as shown in FIG. That is, it is composed of a handle unit 31, a probe unit 32, and a transducer unit 33. These three units 31 to 33 are assembled in a state shown in FIG.
[0017]
The vibrator unit 33 is provided with a handpiece 34 that is detachably connected to the handle unit 31. The handpiece 34 has a built-in ultrasonic vibrator (not shown) for generating ultrasonic vibration in a cylindrical cover 34a.
A horn (not shown) for expanding the amplitude is connected to the distal end of the ultrasonic transducer, and a proximal end of the probe unit 32 is attached to the distal end of the horn.
[0018]
The cylindrical cover 34a of the handpiece 34 is provided at its distal end with a unit connecting portion 34b that is detachably connected to a later-described vibrator connecting portion 6b at the rear end of an operating portion main body 6a of the handle unit 31. ing. An engagement ring 39 (a so-called C-ring) having a C-shape in which a part of the ring is cut off is mounted on an outer peripheral surface of the unit connecting portion 34b. The engaging ring 39 has a substantially half-moon cross section whose outer periphery is an arc.
The rear end of the cylindrical cover 34a is connected to a handpiece cord 16 having a handpiece plug 17 at the end.
[0019]
The probe unit 32 is provided with an elongated, substantially rod-shaped probe 9 detachably connected to a tip end of a horn (not shown) in the transducer unit 33.
At the base end of the probe 9, a mounting screw 41a is formed which is connected to a probe mounting portion (not shown) provided at the end of the horn. The mounting screw 41a is screwed and fixed in a screw hole of a probe mounting portion of the transducer unit 33. Thus, the probe unit 32 and the transducer unit 33 are integrally assembled.
[0020]
Further, the probe 9 is provided with support members 71 (more specifically, 71a to 71c, which will be described with reference to FIG. 6) at all the positions of the nodes of the standing wave of the ultrasonic vibration transmitted from the base end side. I have. This support member 71 is formed in a ring shape.
Further, in the probe 9 according to the present embodiment, a proximal horn 41c that performs the second-stage amplitude expansion is disposed in front of the second node from the proximal end. Further, on the distal end side of the proximal horn 41c, an intermediate portion 41d for transmitting ultrasonic vibration, a distal horn 41e for finally increasing the amplitude, and a treatment section 41f for performing a treatment are sequentially arranged. . Here, the treatment section 41f arranged at the most distal end of the probe 9 is formed, for example, in a substantially circular cross-sectional shape.
[0021]
Further, the handle unit 31 includes an elongated insertion sheath portion 31a, a distal end working portion 31b disposed at a distal end portion of the insertion sheath portion 31a, and an operation portion 6 disposed at a base end portion of the insertion sheath portion 31a. Consists of Here, the operation unit 6 of the handle unit 31 is provided with a substantially cylindrical operation unit main body 6a. A vibrator connecting portion 6b is formed at the base end of the operation portion main body 6a.
[0022]
The operation unit body 6a is provided with a fixed handle 42 and a rotatable movable handle 43 constituting an operation means on the outer peripheral surface, and the fixed handle 42 and the movable handle 43 are used to operate the operation handle 8 (see FIG. 1). Is configured.
The operation section main body 6a is provided with an electrode pin 44 for high frequency connection to which a high frequency power supply device (not shown) is connected.
[0023]
The upper portion of the fixed handle 42 is integrally formed with the cylindrical operation portion main body 6a. Further, the operation end of the fixed handle 42 is provided with a finger hole 42a into which a plurality of fingers other than the thumb can be selectively inserted, and the operation end of the movable handle 43 is provided with a finger hole 43a for the thumb of the same hand. Is provided.
[0024]
Further, a bifurcated connecting portion 43b is formed on the upper end side of the movable handle 43. These bifurcated connecting portions 43b are arranged on both sides of the operation portion main body 6a. Further, a handle pivot shaft 45 protrudes inward from the upper end of each connecting portion 43b. These handle pivot shafts 45 are connected to the operation section main body 6a at fulcrums above the axis of the insertion section outer tube 4. Thus, the movable handle 43 is pivotally supported by the handle pivot shaft 45. The handle pivot 45 is provided with an insulating cap for high-frequency insulation.
[0025]
Further, an operating shaft 47 is provided below the handle pivot shaft 45 in each connecting portion 43 b of the movable handle 43. The operating shaft 47 transmits an advance / retreat force to an operation rod 50 (see FIG. 5: operation force transmission member) inserted into the insertion portion outer tube 4. Then, the operation rod 50 causes the treatment section 41f to perform an operation of opening and closing a jaw 51 described later by an operation of moving forward and backward in the axial direction. That is, the movable handle 43 and the operating shaft 47 constitute operating means. The operating shaft 47 is arranged substantially on the axis of the insertion portion mantle tube 4.
In the present embodiment, when the ultrasonic treatment device 2 grasps the handle and closes the movable handle 43, the operating shaft 47 moves forward, thereby pushing the operation rod 50 forward, and the ultrasonic treatment device 2 The jaws 51 are configured to close.
[0026]
As described above, the insertion sheath portion 31a is formed by the insertion portion outer tube 4, and the base end of the insertion portion outer tube 4 is connected to the distal end portion of the operation portion main body 6a together with the rotation knob 48. It is attached so as to be rotatable around the center line of the main body 6a. Here, the insertion portion outer tube 4 is formed by attaching an insulating tube to an outer peripheral surface of a metal tube (not shown). This insulating tube is provided so as to cover most of the outer peripheral surface of the insertion portion outer tube 4 up to the base end.
[0027]
In the handle unit 31, a one-sided jaw 51 for gripping a living tissue is rotatably attached to the distal end working portion 31b. An operation rod 50 is connected to the jaw 51 at a base end thereof as described later.
[0028]
As shown in FIG. 4, the insertion portion outer tube 4 is provided with a jaw holding portion 52 for holding a jaw 51 at the distal end. The jaw holder 52 is covered with an insulating cover (not shown) at the distal end of the substantially tubular holder main body 52a, and is insulated from high-frequency current. Further, a holding member 54 for holding a living tissue (organ) is swingably attached to the jaw 51 at a swing fulcrum.
[0029]
The probe 9 of the probe unit 32 is inserted into the insertion portion outer tube 4. An operation rod 50 is inserted into the insertion portion outer tube 4 so as to be able to advance and retreat, in addition to the probe 9. The operation rod 50 is arranged so that a gap is formed in the insertion portion outer tube 4.
[0030]
FIG. 5 shows the configuration of the treatment section 5 on the distal end side.
As shown in FIG. 5, the jaw 51 is inserted into a U-shaped slot at the distal end of the holding member main body 52 a at the distal end of the insertion portion mantle tube 4. It is rotatably attached to the holding member main body 52a via the.
[0031]
In order to ensure sufficient strength of the holding member main body 52a, the slot is opened only above the holding member main body 52a without penetrating the holding member main body 52a up and down. That is, the cross-sectional shape of the portion of the holding member main body 52a in which the slot is formed is U-shaped.
[0032]
The jaw 51 is swingably arranged by, for example, fitting a gripping member 54 from below into a groove or the like at the center of the jaw 51. That is, the gripping member 54 is integrally connected to the jaw 51 so as to be sandwiched therebetween, and the gripping member 54 is pivotally mounted on the pivotal pin 61a about the center of the jaw 51 in the paper plane of FIG. .
The gripping member 54 has a substantially saw-toothed tooth portion 55 at the bottom surface, that is, at the portion of the distal end portion of the probe 9 facing the treatment portion 41f. The gripping member 54 is made of a low friction material such as PTFE (Teflon: trade name of DuPont). Moreover, since the gripping member 54 alone has poor rigidity, the rigidity may be secured by attaching a metal strength member (not shown).
[0033]
The distal end connecting portion 50a of the operation rod 50 is connected to the base end of the jaw 51. Specifically, the distal end connecting portion 50a of the operating rod 50 is inserted into a slot formed on the base end side of the jaw 51, and the pivot pin 63 is inserted through a shaft hole provided in the distal end connecting portion 50a. And are rotatably connected.
[0034]
In other words, the jaw 54 is rotatably held by the support shaft 60 by the holding member main body 52a, and is rotatably connected to the operation rod 50 by the support pin 63 located above the support shaft 60. I have.
Therefore, when the operating rod 50 advances and retreats, the jaw 51 rotates around the pivot 60 and opens and closes.
[0035]
As shown in FIG. 5, the probe 9 is inserted into a probe channel tube 65 (probe channel) provided in the center near the lower portion of the mantle tube 5, and an operation rod 50 can be advanced and retracted on the upper side thereof. A rod channel 66 is formed to be inserted into the rod channel 66.
[0036]
The probe 9 has an annular support member 71a attached as a spacer near the inner side of the holding member main body 52a on the outer peripheral surface at a position serving as a node of vibration of the probe 9, and the probe 9 is provided inside the probe channel tube 65. It is supported coaxially.
[0037]
In other words, FIG. 5 shows one support member 71a on the distal end side of the probe 9, but as shown in FIG. 6, in the present embodiment, the probe 9 has a vibration node (hereinafter referred to as a node position). Abbreviations) In all, annular support members 71a, 71b, 71c made of hard resin such as PTFE and having little elastic deformation are attached by press fitting or the like.
[0038]
In this case, as shown in FIG. 6, the probe 9 is attached to the front and rear ends of the attached support member 71i so that the support member 71i (i = a to c) can be reliably positioned at the joint position where the support member 71i is attached. At a corresponding position, a flange portion is formed such that its outer diameter Dj (j = 1 to 3) is larger than the outer diameter dj at its central portion.
That is, Dj> dj (D1> d1, D2> d2, D3> d3) is set.
[0039]
The support member 71i has an inner diameter shape that matches the outer diameter shape of the node position portion to be attached.
In addition, in order to reduce the deformation of the support member 71i and facilitate installation, the outer diameter dj at the joint position on the base end (rear end) side is equal to the outer diameter Dj− of the flange portion at the joint position on the forward side. It is larger than 1. The outer diameter of the treatment section 41f is indicated by D0.
That is, dj> Dj−1 (d3> D2,..., D1> D0).
[0040]
The outer diameter of the support member 71i is set substantially equal to the inner diameter D of the probe channel tube 65. At the base end of the probe 9, a mounting screw 41a is provided.
[0041]
With such a configuration, the support member 71c is first attached to the most proximal end of the probe 9 from the distal end side, that is, to a node position at a distance of 1/2 wavelength from the ultrasonic transducer. In this case, the inner diameter is easily larger than the outer diameter of the flange even if there is a flange in the middle up to the joint position where the mounting position is, so that the inner diameter can be easily passed through. When it is deformed once so as to get over the front flange portion, it can be positioned and fixed at the node position by press fitting.
[0042]
Next, a support member 71b to be attached to one of the joint positions closer to the front end can be attached by the same operation, and such an operation is similarly performed up to the support member 71a to be attached to the joint position on the foremost side. In this way, the support member 71i can be positioned and fixed by a simple operation by press-fitting or the like with an operation with little elastic deformation. In FIG. 6, the case of three support members 71a to 71c has been described for the sake of simplicity. However, the present invention can be widely applied to a case of two or more places.
[0043]
Therefore, according to the present embodiment, since the elastic deformation of the support member 71i during assembly is small, the mounting becomes easy. In addition, since it is harder than rubber, positioning becomes accurate. Since the probe 9 is constrained at the center of the channel at all the nodal positions, the rigidity at the tip of the probe is improved.
In addition, due to the strong support at the node position, the treatment function such as incision by ultrasonic waves can be improved.
[0044]
Specifically, it is possible to reduce the bending vibration in the audible range by effectively suppressing the occurrence of the low-frequency mode of the bending vibration by the rigid support at the node position. Further, since the occurrence of bending vibration can be suppressed as a whole, energy loss is small, and the efficiency of vibration transmission by the probe 9 can be improved.
[0045]
(Second embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. An object of the present embodiment is to improve the cleanability of the inside of a channel through which a probe is inserted.
The probe 9 in the present embodiment is inserted into the probe channel tube 65 of the mantle tube 4 formed as shown in FIG. .
[0046]
The support members 81a and 81b made of resin for supporting the probe 9 in the probe channel tube 65 and preventing the metal contact between the probe 9 and the channel tube 65 are positioned at the nodes of the probe 9; And the outer peripheral shape of the member is adapted to the inner diameter shape of the probe channel tube 65 through which the probe 9 is inserted, that is, the circular shape.
[0047]
The probe 9 has a curved treatment section 41f at the distal end, and a proximal end thereof becomes a first node through a conical horn 82a, and a second section formed rearward from the position. The position becomes the second node via the horn 82b.
The position of the first node and the position of the second node (corresponding to the node position of the first embodiment) are slightly reduced in diameter to form attachment portions 83a and 83b, respectively, and are respectively annular support members 81a. , 81b are attached by press-fitting from the distal end side.
[0048]
In this case, as described in the first embodiment, the inner diameter of the second support member 81b is larger than the inner diameter of the first support member 81a. If the first support member 81a is inserted through the mounting portion 83b by press-fitting, and then the first support member 81a is inserted into the mounting portion 83a by press-fitting, the mounting can be performed with a simple operation and with less elastic deformation at the time of press-fitting.
[0049]
With such a configuration, it is not necessary to attach an annular member to the probe channel tube 65 as in the first embodiment, so that the probe channel tube 65 can be easily cleaned.
Further, as described in the first embodiment, the support at the node of the vibration can be performed with high rigidity, and the occurrence of unnecessary bending vibration can be suppressed. Furthermore, the support of the probe 9 can be strengthened with respect to the channel tube 65 side, and the displacement of the treatment section 41f can be reduced.
[0050]
FIG. 8 shows a modification of FIG. In the probe 9 according to this modification, the channel shape of the probe channel tube 65 ′ provided in the outer tube 4 has an irregular shape. In this example, the upper side is formed into an irregular shape having a flat shape.
[0051]
Therefore, in this modification, the shape of the probe 9 itself is almost the same as that of FIG. Are formed, and hollow first and second support members 81c and 81d having irregular inner diameters are attached to the respective mounting portions 83c and 83d by press-fitting from the distal end side.
[0052]
Also in this case, the inner diameter of the second support member 81d is larger than the inner diameter of the first support member 81c. First, the second support member 81d is inserted through the distal end of the probe 9 and press-fitted into the mounting portion 83d. When the first support member 81c is attached to the attachment portion 83c by press-fitting after that, it is a simple operation and has little elastic deformation at the time of press-fitting. Can be mounted with accurate positioning.
This modification has the same effect as that of FIG. 7 and also has the effect of having a function as a positioning means for the probe 9 which needs to be positioned in the rotation direction.
[0053]
(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIGS. An object of the present embodiment is to suppress deflection of the probe and contact with the surroundings, thereby improving the reliability of the treatment function.
[0054]
As shown in an exploded view in FIG. 9, the outer peripheral surface of the treatment portion 41 f on the distal end side of the probe 9 is machined to form a fitting portion 76. A protection member (restriction member) 77a or a protection member 77b having a rectangular outer shape is fitted and inserted.
[0055]
A gripping member 54 is disposed on the upper side of the treatment section 41f, and the gripping member 54 is swingably connected to the jaw 51 as shown in a cross section in FIG. 10A or 10B. FIGS. 10A and 10B show a cross-sectional structure at a position corresponding to the position of the pivot 60 in FIG. 5, for example, in the first embodiment.
[0056]
As shown in FIG. 10, the base end of the jaw 51 fitted inside the holding member main body 52a is rotatably supported by a pivot pin 60 '. The connecting portion 50a of the operating rod 50 is inserted into the groove on the upper end side of the jaw 51, and the jaw 50 is rotatably connected between the connecting portion 50a and the jaw 51.
[0057]
In the present embodiment, the vicinity of the proximal end of the treatment section 41f is disposed in the space inside the jaw 51 near the position of the pivot pin 60 '. As shown in FIG. 9, the insertion portion 76 is formed to insert a protection member 77b having an annular shape or a rectangular outer shape (although the inner circumference is circular), and the surrounding jaw 51, the holding member main body 52a and the like are inserted. An appropriate gap is formed.
[0058]
The protection members 77a and 77b prevent the treatment section 41f from directly contacting surrounding members and also suppress the occurrence of bending in unexpected directions due to external force or the like.
[0059]
That is, in the present embodiment, the protective members 77a and 77b having an insulating function, specifically made of resin, are fitted to the distal end of the probe 9 at a position close to the proximal end of the treatment section 41f with an appropriate gap from the surroundings. For example, an appropriate gap is secured between the protection member 77 and the surrounding holding member only in the upward and lateral directions, and the probe 9 normally operates due to the downward pressing force applied when gripping from the jaw 51 side. It is arranged to suppress a predetermined amount or more of bending in a direction other than bending.
[0060]
Further, in this case, by adopting a resin such as PTFE having a good slippery outer surface as the protection members 77a and 77b, even if the protection members 77a and 77b come into contact with the surrounding members, the movement of the surrounding members does not become a resistance. .
[0061]
The protection members 77a and 77b are made of a resin having a lower hardness than the surrounding members, so that the treatment section 41f and the surrounding members, for example, the jaw 51 side are not damaged even for long-term use. An ultrasonic treatment instrument that can be protected and can be dealt with simply by replacing the worn protection member 77a, 77b side, and can maintain a predetermined treatment function for a long time at low cost can be realized.
[0062]
Therefore, according to the present embodiment, unexpected bending when a normal load or an external force other than the load that grips the living tissue is applied by the closing operation of the jaw 51 can be suppressed by the protection member 77a or 77b, The reliability of treatment functions such as incision can be improved.
[0063]
Further, the variation between products can be reduced by the protection member 77a or 77b. When the treatment is performed by using a high-frequency current, the protection member 77a or 77b also has a protection function of insulating the treatment portion 41f from the surroundings.
[0064]
FIG. 11 shows the tip side of the probe 9 in a modified example. The probe 9 is provided with a treatment section 41f whose tip is bent (curved) in the horizontal direction. For this reason, in this modification, the protection member 77c enlarged in the horizontal direction shown in FIG. 11 and disassembled is fitted into the fitting portion 76b provided near the base end of the treatment portion 41f.
The insertion portion 76b has an irregular shape in which a vertical side surface portion is flat (different from a circle), and the inner peripheral surface of the protection member 77c is also fitted to the shape so that positioning in the circumferential direction can be performed. I have to.
[0065]
The sectional shape of the pivot pin 60 'in this case is as shown in FIG. This modification also has substantially the same operation and effect as the third embodiment shown in FIG.
[0066]
In addition, you may make it suppress the bending part (bending amount) by which the treatment part 41f is bent (bent) below with respect to the external force at the time of a treatment with the protective members 77a-77c mentioned above. That is, the bottom surfaces of the protection members 77a to 77c may be prevented from contacting the surrounding holding member 52 and being bent further downward.
[0067]
(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described with reference to FIGS. The present embodiment has a structure that suppresses bending vibration of the probe. FIGS. 13A and 13B show deformation of the probe at the abdomen at the time of longitudinal vibration and bending vibration.
[0068]
As shown in FIGS. 13A and 13B, in the present embodiment, the probe 9 is provided with an absorber 91 between nodes of vibration. As described above, the vibration node is supported in a ring shape by the support member 71 made of a hard resin or the like, and at an intermediate position between the vibration nodes, for example, at an antinode, a rubber-like elastic body or the like is provided. An absorber 91 made of a lossy material is attached.
[0069]
The absorber 91 has a size that does not contact the inner peripheral surface of the probe channel tube.
[0070]
In the case of the original longitudinal vibration for performing the ultrasonic treatment as shown in FIG. 13 (A), the absorber 91 moves in parallel in the longitudinal direction of the probe 9 as shown by the white and black arrows.
Therefore, the energy of the longitudinal vibration is not absorbed because the absorber 91 formed of the rubber-like elastic body is moved only in the forward and backward directions and hardly expands or contracts.
[0071]
On the other hand, when bending vibration occurs, as shown in FIG. 13 (B), the probe 9 bends in a direction orthogonal to the longitudinal direction, and in the state shown by the solid line, the upper side of the absorber 91 is outlined with this. Tensile deformation occurs as indicated by the arrow, and compression deformation occurs on the lower side. In addition, in the vibration state indicated by the two-dot chain line, the upper side of the absorber 91 undergoes tensile deformation as indicated by the black arrow, and the lower side thereof undergoes compressive deformation.
[0072]
In this case, the energy of the bending vibration is converted into heat energy by the hysteresis characteristic of the absorber 91 and released into the atmosphere, thereby acting to attenuate the bending vibration.
[0073]
Further, in the present embodiment, the mode of bending vibration is fixed to almost one type by firmly positioning the position of the node in the vertical direction, and the node is driven out of the audible band. In this mode, the vibration energy at the position of the antinode of the standing wave is absorbed and attenuated by the absorber 91 formed of a rubber-like elastic body or the like. As a result, bending vibration can be suppressed.
[0074]
By the way, like the probe 9 shown in FIG. 14, a support member 71 is attached to a portion of the node of vibration to support the channel through which the probe 9 is inserted, and the inner diameter of the probe 9 in the portion between them is changed. Is also good.
[0075]
That is, the diameter of the probe 9 (the diameter is indicated by φA, φB, φC, φD from the tip side in FIG. 14) is changed for each interval of the positions of the nodes of the probe 9, that is, for every λ / 2 of the vibration frequency. As a result, the natural frequency of the bending vibration between the support members 71 is made to have no random periodicity, and the whole is not resonated in a specific bending vibration mode. That is, when I ≠ J (I, J = A to D), φI ≠ φJ.
By doing so, since the natural frequency of the bending vibration differs depending on the position of the probe 9 in the longitudinal direction, resonance can be hardly generated, and the bending vibration generated due to the interference of the bending vibrations of different frequencies can be reduced. it can.
[0076]
Embodiments configured by partially combining the above-described embodiments and the like also belong to the present invention. For example, in the first embodiment, an absorber 91 that absorbs lateral vibration generated in the probe 9 shown in FIG. 13 may be provided between nodes.
[0077]
Further, the protection members 77a to 77c described with reference to FIG. 9 and the like may be provided near the base end of the treatment section 41f. Further, as the support members 71a to 71c provided at the positions of the nodes, when the cross section of the probe channel is not circular as shown in FIG. 8, the outer peripheral shapes of the support members 71a to 71c are changed so as to match the shape. You may do it.
The present invention is not limited to the above-described embodiment, and various changes, modifications, and the like can be made without departing from the spirit of the present invention.
[0078]
[Appendix]
1. 2. The ultrasonic probe according to claim 1, wherein a positioning portion is formed by providing two flange portions at positions corresponding to both end surfaces on the distal end side and the proximal end side of the support member with the position of the node as a center. It is characterized by the following.
2. In claim 1, the support member is made of a hard resin.
2b. In claim 1, the support member is made of a low friction material.
[0079]
3. In claim 1, the outer peripheral shape of the support member is substantially the same as the inner peripheral shape of the channel through which the ultrasonic probe is inserted.
[0080]
4. In claim 1, a protection member is attached near the base end of the treatment section to prevent contact with members around the treatment section.
4b. In Supplementary Note 4, the protective member has insulating properties.
4c. In Supplementary Note 4, the protection member has lower hardness than surrounding members.
5. In claim 1, an absorber that absorbs bending vibration energy is attached between the nodes of the ultrasonic probe.
[0081]
5b. In Supplementary Note 5, the absorber is an attenuation material having hysteresis characteristics.
[0082]
5c. In Supplementary Note 5, the absorber is made of rubber.
[0083]
6. An ultrasonic vibrator for generating ultrasonic vibration,
An ultrasonic probe connected to the ultrasonic transducer and transmitting ultrasonic vibration,
A channel through which the ultrasonic probe is inserted,
A jaw rotatably supported at the distal end of the channel and for grasping a living tissue between the treatment section at the distal end of the ultrasonic probe,
An operation rod that is provided along the channel, transmits an operation force by an operation unit on a hand side, and rotates the jaw;
With
In the vicinity of the proximal end of the treatment portion, a predetermined gap is formed between the treatment portion and peripheral members such as the surrounding jaws, and a protection member for preventing contact with the periphery of the treatment portion is provided. Ultrasonic treatment device characterized by the following.
7. In Supplementary Note 6, the protection member has a function of suppressing movement other than movement of the treatment section in a downward direction due to an external force from the jaw side (movement in the upward and left and right directions) and also ensuring electrical insulation. Have.
8. In Appendix 6, the protection member has a function of suppressing downward bending due to an external force from the jaw side.
[0084]
(Background of Supplementary Notes 6 to 8)
In the conventional example, the deflection of the tip side of the ultrasonic probe is controlled by the rigidity of the ultrasonic probe itself or a spacer provided in a channel near the tip.
In this case, since the portion receiving the external force, particularly the distal end portion, and the supporting portion are separated from each other, the deflection at the distal end side of the ultrasonic probe increases, and the ultrasonic probe easily comes into contact with the surrounding components, and wear and the like occur. There are drawbacks such as the occurrence of a short life.
(Purpose) To secure the necessary treatment function on the tip side of the ultrasonic probe and to prevent contact with the surrounding members and unnecessary movement against external force, to prevent a shortening of the life, The purpose of the present invention is to provide an ultrasonic treatment apparatus capable of improving the reliability, and to achieve the object, the configurations of Supplementary Notes 6 to 8 are provided.
[0085]
【The invention's effect】
As described above, according to the present invention, it is not necessary to provide a member for supporting the ultrasonic probe on the channel side through which the ultrasonic probe is inserted. It can be accurately supported at the position of the node, and the function of the ultrasonic treatment can be improved.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram showing an ultrasonic treatment apparatus according to a first embodiment of the present invention.
FIG. 2 is a circuit block diagram showing the configuration of the apparatus main body of FIG.
FIG. 3 is a side view showing a disassembled state of the ultrasonic treatment device in FIG. 1;
FIG. 4 is a side view showing an assembled state of the entire ultrasonic treatment instrument in FIG. 1;
FIG. 5 is a cross-sectional view showing a configuration of a treatment section on the distal end side of the ultrasonic treatment instrument.
FIG. 6 is a side view of an ultrasonic probe provided with an annular support member.
FIG. 7 is a perspective view showing an ultrasonic probe k according to a second embodiment of the present invention.
FIG. 8 is a perspective view showing an ultrasonic probe according to a modification.
FIG. 9 is a perspective view showing a distal end side of an ultrasonic probe according to a third embodiment of the present invention.
FIG. 10 is a cross-sectional view at the position of a pivot supporting the jaw near the base end of the treatment section.
FIG. 11 is a perspective view showing a distal end side of an ultrasonic probe according to a modification.
FIG. 12 is a cross-sectional view at the position of a pivot supporting the jaw near the base end of the treatment section.
FIG. 13 is an explanatory diagram showing a configuration of an ultrasonic probe according to a fourth embodiment of the present invention, which also has its function.
FIG. 14 is a side view showing an ultrasonic probe according to a modification.
[Explanation of symbols]
1. Ultrasonic treatment device
1A: Device body
2. Ultrasonic treatment tool
3 ... Foot switch
4: Insert tube
5 Treatment section
6 Operation unit
9 ... (ultrasonic) probe (vibration transmitting member)
31 Handle unit
32 ... Probe unit
33 ... Transducer unit
41f ... Treatment unit
50 ... Operation rod
51 ... Joe
52 ... Jaw holding part
52a: Main body of holding section
54 ... Grip member
55 ... Tooth
60 ... Pivot shaft
61 ... Tilt support
71a-71c: Supporting member

Claims (3)

An ultrasonic vibrator for generating ultrasonic vibration,
An ultrasonic probe connected to the ultrasonic transducer and transmitting ultrasonic vibration,
A channel through which the ultrasonic probe is inserted,
A jaw rotatably supported at the distal end of the channel, for grasping a living tissue between the distal end of the ultrasonic probe,
An operation rod that is provided along the channel, transmits an operation force by an operation unit on a hand side, and rotates the jaw;
With
An ultrasonic treatment apparatus, wherein an annular support member is attached to substantially all positions that serve as nodes of vibration of an ultrasonic probe, and is supported so that vibration can be transmitted in the channel. An ultrasonic vibrator for generating ultrasonic vibration,
An ultrasonic probe connected to the ultrasonic transducer and transmitting ultrasonic vibration,
A channel through which the ultrasonic probe is inserted,
A jaw rotatably supported at the distal end of the channel, for grasping a living tissue between the distal end of the ultrasonic probe,
An operation rod that is provided along the channel, transmits an operation force by an operation unit on a hand side, and rotates the jaw;
A drive circuit for driving the ultrasonic transducer,
With
An ultrasonic treatment apparatus, wherein an annular support member is attached to substantially all positions that serve as nodes of vibration of an ultrasonic probe, and is supported so that vibration can be transmitted in the channel. The ultrasonic treatment apparatus according to claim 1, wherein the outer diameter of the ultrasonic probe at the position of the node is reduced toward the distal end.

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