close

Вход

Забыли?

вход по аккаунту

?

JPH04336061

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPH04336061
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the
treatment of an object to be treated such as a calculus produced on the human body by
irradiating with a strong ultrasonic wave generated by a plurality of bolt-clamped Langevin type
transducers outside the body. The present invention relates to an ultrasonic therapeutic
apparatus for treating a patient.
[0002]
2. Description of the Related Art Conventionally, there is known an ultrasonic therapeutic
apparatus for treating an object to be treated such as a calculus in the body by applying
ultrasonic waves. Regarding the ultrasonic treatment apparatus, in Japanese Patent Application
No. 2-80451, the applicant places a diaphragm on the front surface of the ultrasonic radiation
surface of a single bolted Langevin type transducer (hereinafter abbreviated as BLT), We propose
a device that supports and fixes the diaphragm.
[0003]
In addition, as a conventional ultrasonic treatment apparatus, for example, in JP-A-2-237557, a
plurality of transducers are arranged on the inner surface of a rigid spherical support member,
and in particular, In Japanese Patent Application Laid-Open No. Hei 12-126848, there is known
one in which a transducer made of piezoelectric ceramic is adhered and fixed to the outside of a
radiation surface of a housing which also serves as an acoustic matching layer.
04-05-2019
1
[0004]
However, in the apparatus proposed in the above-mentioned Japanese Patent Application No. 280451, since a single BLT is used, sufficient acoustic output required for treatment is treated as a
treatment target I can not irradiate things.
Further, in the apparatus disclosed in JP-A-2-237557, since the plurality of transducers are
disposed on the inner surface of the spherical support member, the plurality of BLTs can not be
securely fixed and supported.
[0005]
On the other hand, in the conventional device disclosed in JP-A-2-126848, the vibrator is
disposed on the outer surface of the support member, but since a high frequency piezoelectric
ceramic vibrator is used, sufficient acoustic output can be obtained. In order to obtain a large
number of vibrators are required, the apparatus becomes large, and there is a disadvantage that
the vibrators can not be replaced because the vibrators are bonded and fixed.
[0006]
The present invention has been made in view of the above problems, and an object thereof is to
arrange a plurality of BLTs so as to be able to emit low-frequency strong ultrasonic waves while
being compact, and to obtain an effective therapeutic effect. It is an object of the present
invention to provide a lytic treatment device that can be obtained.
[0007]
SUMMARY OF THE INVENTION In order to solve the above problems, the present invention is
directed to a plurality of bolted Langevin type transducers for generating a therapeutic ultrasonic
wave and the plurality of bolted Langeban types. The vibrator is arranged side by side around the
circumference, and the vibrator is held so as to converge the ultrasonic wave irradiation axes of
the plurality of vibrators so as to converge, and the vibrator connects the bolt-clamped Langevin
vibrator It is characterized in that the portion is counter-sunk, whereby the thickness of the
connection portion of the vibrator is made substantially uniform, and by providing the
countersunk portion, a plurality of bolt-clamped Langevin type vibrators can be reliably provided.
It can be fixed to a plurality of bolt-clamped Langevin type transducers so that strong ultrasonic
waves can be emitted.
04-05-2019
2
[0008]
Embodiments of the present invention will be described below with reference to the drawings.
1 to 9 relate to a first embodiment of the present invention, and FIG. 1 is a cross-sectional view
showing an ultrasonic applicator, FIG. 2 is a structural view showing a shape of a vibrator, and
FIG. FIG. 4 is an explanatory view showing the configuration, FIG. 4 is a perspective view showing
a support portion of the ultrasonic applicator, FIG. 5 is an enlarged view showing an angle
changing mechanism of the ultrasonic applicator of FIG. 4 (b) shows an engagement portion of
the gear in a cross section taken along line B-B 'of FIG. 4 (a), and FIG. 6 is an enlarged view of a
modified example of the angle changing mechanism of FIG. 6 (a) shows a cross section, and FIG.
6 (b) shows an engagement portion of the gear in a cross section taken along the line C-C 'of FIG.
6 (a). FIG. FIG. 8 is a distribution diagram showing an example of a sound pressure distribution
state detected by FIG. 7, and FIG. 9 is a configuration diagram showing a modified example of
FIG.
[0009]
As shown in FIG. 3, a human body 2 to be treated by the ultrasonic treatment apparatus 1 is
mounted on a treatment table 3 and, for example, gallstones 4 are present at the treatment site in
the human body 2. It is happening.
The ultrasonic treatment apparatus 1 includes a catheter 6, and the distal end of the catheter 6 is
inserted into the gallbladder 4 percutaneously.
The catheter 6 is formed of a porous tube and has three lumens, an injection conduit 6a, a
suction conduit 6b, and a pressure conduit 6c. The three lumens described above for the catheter
6 are branched at the back end of the catheter, the injection conduit 6a is connected to the
injection pump tube 8a via the connector 7a, and the pressure conduit 6c is connected to the
pressure sensor 9 .
[0010]
04-05-2019
3
The injection pump tube 8a has an injection pump 10 interposed in the middle, and an end
thereof stores a chemical solution which is a calculus dissolving agent such as monooctanoin, dlimonene or methyl t-butyl ether (MTBE). It is connected to the liquid tank 12. A suction pump
11 is interposed at an intermediate portion of the suction pump tube 8b, and an end portion
thereof is connected to a drainage tank 13 for storing the fluid collected from the treatment site.
[0011]
Furthermore, the injection pump 10 and the suction pump 11 are connected to the input /
control device 20 through the control unit 19, and the pump rotational speed is freely set by the
control unit 19, and the input / control The drive time of each pump 10, 11 and the switching
operation of the pumps 10, 11 are set by the apparatus 20, and the pumps 10, 11 operate
according to the setting contents.
[0012]
Further, a strong ultrasonic applicator (also referred to simply as an ultrasonic applicator 14) for
emitting a strong ultrasonic wave is provided so as to face the human body 2.
As shown in FIG. 1, the (strong) ultrasonic applicator 14 internally has an observation ultrasonic
probe 22 disposed on the central axis, and an irradiation axis of ultrasonic waves in the
circumferential direction around the central axis. A plurality of BLTs 29 arranged in an inclined
manner are provided, and by focusing (focusing) the ultrasonic waves emitted from each BLT 29
along the irradiation axis at one point, it is possible to irradiate strong ultrasonic waves.
[0013]
The ultrasonic applicator 14 is supported and fixed by a support member 21 disposed at the tip
of the support arm 15. Each of the BLTs 29 is connected to a power amplifier 17 by a cable 16,
and the output signal of the oscillator 18 is amplified and input to the power amplifier 17.
[0014]
04-05-2019
4
A signal adjusted and set with respect to the frequency, amplitude, number of pulses, pulse
interval, driving time and the like of the output signal is inputted to the oscillator 18 from the
control unit 19. The output signal of the oscillator 18 is amplified by the power amplifier, and the
amplified signal is applied to the BLT 29 in the ultrasonic applicator 14.
[0015]
The ultrasonic waves excited by the plurality of BLTs 29 described above are irradiated to the
vicinity thereof including the calculus 5 present in the gallbladder 4 of the human body 2.
Further, the observation ultrasonic probe 22 is connected to an ultrasonic observation device 23,
and an ultrasonic image including the gallbladder 4 in the human body 2 is displayed on a
monitor 24.
[0016]
The control unit 19, the input / control device 20, the injection pump 10, the suction pump 11,
the oscillator 18 and the power amplifier 17 are connected to a power supply via an isolation
transformer 26 and a power switch 25. There is. The pressure sensor 9 is movable on the rail 27
in the vertical direction, that is, in the vertical direction, and is fixed at an arbitrary position on
the rail 27.
[0017]
The control unit 19, the input / control device 20, the connectors 7a and 7b, the injection pump
10, the suction pump 11, the liquid tank 12, the drainage tank 13, the oscillator 18 and the
power switch 25. The isolation transformer 26, the rail 27 and the power amplifier 17 are
installed or fixed on the main body rack 28.
[0018]
Next, the configuration of the main part of this embodiment will be described with reference to
FIG. 1 and FIG.
04-05-2019
5
Here, FIG. 2 is an arrow view of only the vibrating body 31 in FIG. 1 viewed from the A direction,
and is symmetrical with L as a center line. The ultrasonic applicator 14 is provided with five BLTs
29 inside a housing 32, and each BLT 29 is fixed to the vibrator 31 by bolts 39 respectively. The
observation ultrasonic probe 22 is rotatably supported on the central axis O of the vibrating
body 31.
[0019]
Further, the vibrating body 31 is held by the ring 34 by the ring 34 together with a film 33 made
of a soft resin or the like disposed on the outer side of the vibrating body 31. The space
surrounded by the tip of the observation ultrasonic probe 22 is filled with an ultrasonic
transmission medium 35 such as water. Further, the cables 16 connected to the respective BLTs
29 are extended to the outside through connectors 37 attached to the back cover 36.
[0020]
Then, a point equally divided into five on the same circumference from the central axis O of the
integrally formed vibrating body 31 having rigidity is taken as a mounting central axis O 'of each
BLT 29, and the central axis O' is the center A counterbore 38 is formed in the mounting part of
each BLT 29 so that the focusing area of the ultrasonic wave is F with inclination α with respect
to the axis O, and the thickness t of the radiation surface (emission surface) of each BLT 29 Is
almost constant.
[0021]
That is, the vibrating body 31 in the state in which the counterbore 38 is not provided is not
uniform in thickness, for example, as shown in the right side of FIG. Is getting bigger.
In a portion where the BLT 29 is attached to the vibrating body 31, as shown on the left side of
FIG. 1, the upper surface side of the vibrating body 31 has a circular area slightly larger than the
emitting central plane of the BLT 29 The thickness of the circular area portion (in the vibrating
body 31) after the notch hole is formed (the counterbore hole 38 is formed) and this notch hole
is formed is shown on the left side of FIG. Thus, the thickness t is substantially uniform.
[0022]
04-05-2019
6
Since this notch is made rotationally symmetrical about the direction of central axis O 'inclined
from central axis O, in FIG. 2 viewed from direction A in FIG. The side inner surface appears in an
elliptical shape. Then, bolts 39 are screwed into screw holes respectively provided on the central
axes O ′ to fix the BLTs 29, and five BLTs 29 are integrally attached to the vibrating body 31. In
FIG. 1, the focusing area F of the ultrasonic wave is actually located on the extension of the
central axis O '. The operation of the ultrasonic treatment apparatus 1 of the first embodiment
configured as described above will be described below.
[0023]
The power switch 25 is turned on to activate the dissolution treatment apparatus 1.
Subsequently, the liquid tank 12 is filled with a drug solution, and the infusion pump 10 is
rotated to remove the air in the infusion line 6a. Next, the support member 21 at the tip of the
arm 15 is operated to bring the film 33 of the ultrasonic applicator 14 into contact with the
human body 2 and the observation ultrasonic probe 22 to operate the treatment site in the
human body 2, for example gall bladder 4 and the stone 5 which is a clot formed in the
gallbladder 4 are searched. Here, the position of the probe 22 is adjusted so that the image of the
calculus 5 is positioned on the central axis of the observation screen displayed on the monitor 24
of the ultrasonic observation device 23.
[0024]
Then, the arm 15 and the support member 21 are fixed at that position, the distance from the
surface of the human body 2 to the stone 5 is read from the monitor 24, and the height from the
reference position of the stone 5 is calculated from the distance. The pressure sensor 9 is moved
on the rail 27 to this height, and the pressure sensor 9 is fixed at a substantially coincident
position. Next, the tip of the catheter 6 is released to the atmosphere to perform initial pressure
offset adjustment. Thereafter, the tip of the catheter 6 is inserted into the treatment site in the
body, ie, the gallbladder 4.
[0025]
Subsequently, the suction pump 11 is rotated to discharge bile, and at this time the pressure in
04-05-2019
7
the gallbladder 4 is monitored by the pressure sensor 9, and when the pressure in the
gallbladder 4 starts to become negative, the suction pump Stop 11 Next, from the size of the
gallbladder 4 grasped by the observation screen displayed on the monitor 24 and the size and
type of the calculus 5, the operator can rotate the injection pump 10 and the suction pump 11,
The treatment data such as the intensity of the sound wave, the upper limit value of the pressure
by the liquid chemical in the gallbladder 4 and the response speed of the pressure sensor 9 are
set by the input unit of the control unit 19 not shown.
[0026]
Then, in the input / control unit 20, setting of a sequence of time constituted by the injection
time of the drug solution, the irradiation time of the therapeutic ultrasonic wave and the suction
time of the fluid to be suctioned from the gallbladder 4 Set the number of repetitions. In other
words, the injection time of the above-described chemical solution represents the amount of the
chemical solution to be injected. Subsequently, the treatment by the ultrasonic treatment
apparatus 1 is started based on the above setting. Then, when the ultrasonic treatment apparatus
1 is stopped, the observation ultrasonic probe 22 is operated to confirm the condition as to
whether or not the calculus 5 in the gallbladder 4 is dissolved. Here, if the calculus 5 still exists,
the above-described operation is repeated.
[0027]
When it is confirmed that the calculus 5 is completely dissolved, the arm 15 is operated to
remove the ultrasonic applicator 14 from the human body 2 and the catheter 6 is removed to
complete the treatment. Do. In the ultrasonic treatment apparatus according to the first
embodiment, the vibration body 31 having sufficient rigidity for integral molding is fixed to a
plurality of BLTs 29 with a structure in which the radiation surface portion of the ultrasonic
wave has a substantially uniform thickness t. And each ultrasound emitted from the plurality of
BLTs 29 can be focused on the focusing point with high accuracy, so that strong ultrasound
irradiation in the vicinity of the focusing point becomes possible with high accuracy, so It can be
done effectively.
[0028]
Next, the holding structure of the ultrasonic applicator 14 will be described with reference to
04-05-2019
8
FIGS. 4 and 5. FIG. As shown in FIG. 4, the ultrasonic applicator 14 having the observation
ultrasonic probe 22 on the central axis is rotatably fixed to the support member 21 via the angle
changing mechanism 42 around the rotation shaft 43. The support member 21 is rotatably
disposed on the arm 15. In the angle changing mechanism 42 shown in FIG. 5, the first gear 44
is fixed to the support member 21, and the rotation center axis thereof is coaxial with the
rotation shaft 43.
[0029]
The first gear 44 meshes with a second gear 46 formed on a shaft member 45 attached to the
ultrasonic applicator 14. The shaft member 45 is integrally formed by the shaft 47, the second
gear 46 and the knob 48, and a bearing formed in the ultrasonic applicator 14 by the shaft
portion 47 formed at one end of the shaft member 45. It is inserted into the part 49. A second
gear 46 is provided adjacent to the shaft 47 and is engaged with the first gear 44 so that the end
on the shaft 47 side is in contact with the ultrasonic applicator 14.
[0030]
A knob 48 is provided on the other end side of the shaft member 45. The central axes of rotation
of the shaft portion 47, the second gear 46 and the knob 48 are coaxial with the central shaft 50
of the shaft member 45. Further, in the shaft member 45, a cylindrical hole 51 having a central
axis coaxial with the shaft 50 is provided as shown in FIG. 5B, and a fixing screw having a screw
52 at one end is provided in the hole 51. 53 is loosely inserted. At the other end of the fixing
screw 53, a knob 55 having a step portion 54 is attached.
[0031]
In the angle changing mechanism 42 having such a configuration, when the arm 15 is operated
to bring the ultrasonic applicator 14 into contact with the human body 56, the knob 48 is moved
while looking at the observation image by the observation ultrasonic probe 22. The second gear
46 is operated to rotate. Since the first gear 44 is fixed to the support member 21, the rotation
center shaft 50 of the second gear 46 meshing with the first gear 44 moves on a circumference
centered on the rotation shaft 43.
04-05-2019
9
[0032]
Furthermore, since the shaft portion 47 formed integrally with the second gear 46 is inserted
into the bearing portion 49 of the ultrasonic applicator 14, the ultrasonic applicator 14 also
rotates about the rotation shaft 43. . In this manner, when the ultrasonic applicator 14 is rotated
until the irradiation ultrasonic focusing point by the ultrasonic applicator 14 coincides with the
treatment site on the observation image, the fixing screw 53 is engaged with the ultrasonic
applicator 14 I will. By this operation, the step portion 54 of the knob 55 presses the second gear
46, and the second gear 46 presses the outer surface of the ultrasonic applicator 14 so that the
second gear 46 can not rotate. Therefore, the rotational movement of the ultrasonic applicator
14 with respect to the rotation shaft 43 can be stopped.
[0033]
In this angle changing mechanism 42, since the rotation center axes of the angle changing gear
and the fixing screw are coaxially arranged, fine angle alignment can be achieved with a simple
and compact mechanism. Instead of the angle changing mechanism 42 shown in FIG. 5, the
structure shown in FIG. 6 can be used.
[0034]
In FIG. 6, a hollow shaft member 58 is integrally formed of a second gear 59 engaged with the
first gear 44, a knob 60 and a step portion 61. The rotation center axes of the second gear 59
and the knob 60 are coaxial with the shaft 62, and the diameter of the step portion 61 is smaller
than the bottom circle of the gear 59. A spline 63 is provided in the hollow portion of the shaft
member 58, and engages with a spline 65 provided on the outer peripheral portion of the hollow
cylindrical member 64.
[0035]
A shaft 66 is provided on the cylindrical member 64 and is loosely inserted in a bearing 49
provided in the ultrasonic applicator 14. A fixing screw 67 having a screw 52 at one end is
inserted through the hollow portion of the cylindrical member 64. A knob 69 is provided at the
other end of the fixing screw 67, and a step portion 68 is provided at an intermediate portion.
04-05-2019
10
Reference numeral 70 denotes a coil spring which is wound around the cylindrical member 64,
one end thereof abuts against the ultrasonic applicator 14, the other end abuts against the shaft
member 58, and the shaft member 58 is gripped by the fixing screw 67. It is biased to touch 69.
[0036]
The change of the irradiation angle around the rotation axis 43 of the ultrasonic applicator 14
and the fixation in the configuration of this modification are performed as follows. First, the shaft
member 58 is pushed toward the ultrasonic applicator 14 by the dimension c so that the first
gear 44 and the second gear 59 are not engaged with each other. Since the step portion 61 is not
in contact with the first gear 44, the angle changing operation of the ultrasonic applicator 14 can
be freely performed without being restricted by the first gear 44.
[0037]
After rough alignment with the human body 2 in this state, when the force applied to the shaft
member 58 is released, the shaft member 58 abuts on the tab 69 of the fixing screw 67 by the
reaction force of the spring 70. The first gear 44 and the second gear 59 mesh again. Further,
when the knob 60 is rotated, the shaft 62 can move on the circumference of the rotation shaft 43
and fine angle alignment of the ultrasonic applicator 14 can be performed.
[0038]
When the adjustment of the irradiation angle is completed, the knob 69 is rotated and the screw
52 is engaged with the ultrasonic applicator 14 to press the step portion 68 against the end face
of the cylindrical member 64. Since the end is in pressure contact with the ultrasonic applicator
14, the cylindrical member 64 stops rotating due to the frictional force. Further, since the splines
63 and 65 are engaged, the rotation of the ultrasonic applicator 14 with respect to the rotation
shaft 43 is stopped.
[0039]
In this modification, since the meshing of the first gear 44 and the second gear 59 can be
04-05-2019
11
released, both coarse and fine operations of the irradiation angle change of the ultrasonic
applicator 14 become possible. It became possible to adjust the angle quickly. Next, in the first
embodiment, a configuration in which the sound pressure distribution state in the ultrasonic
applicator 14 can be displayed will be described with reference to FIGS. 7 and 8. FIG. This device
allows the structure in the housing 32 shown in FIG. 1 to be rotatable about the central axis 81
of the observation ultrasonic probe 22 as shown in FIG.
[0040]
In this apparatus, the BLT 29 is accommodated in a plurality of (for example, five) respective
counterbore holes 38 formed on the conical surface of the vibrating body 31 having a
substantially conical vibrating surface, and is not shown by a bolt. It is fixed. Each of the BLTs 29
is disposed such that the ultrasonic wave irradiation axis is focused toward a focusing point F on
the central axis of the vibrator 31. Each BLT 29 is driven by an oscillator and a driver not shown.
[0041]
A membrane 33 is provided on the front side of the vibrator 31 in a watertight manner in order
to make good contact with the patient, and an ultrasonic wave transmission medium 35 is filled
therebetween. In addition, on the central axis 81 of the vibrating body 31, an observation
ultrasonic probe 22 for obtaining an ultrasonic tomographic image is attached via a pivot
mechanism pivotable about the central axis 81, The tomographic image is displayed on the
monitor 24 of the ultrasonic observation device 23.
[0042]
A pulley 84 is attached to the shaft of the ultrasonic probe 22, and a pulley 87 attached to the
shaft of the encoder 85 fixed to the housing 32 and a belt 87 bridging the pulley 84 are
interposed. The rotation of the ultrasonic probe 22 is transmitted to the pulley 86, and the
encoder 85 makes it possible to detect the rotation angle of the ultrasonic probe 22. An output
signal of the encoder 85 is transmitted to an encoder signal detection circuit 88, and is input to
an operation unit 89 as an angle signal.
[0043]
04-05-2019
12
On the other hand, the sound field formed by a plurality of BLTs 29 is, for example, as shown in
FIG. FIG. 8 shows, for example, the sound pressure distribution on the horizontal cross section
passing through the focusing point F, where the sound pressure at the portion where the BLT 29
is located at the irradiation axis is relatively high and the sound pressure at the focusing point F
is the highest. It has become. Therefore, the sound pressure distribution in the space in which the
ultrasonic waves are transmitted from the film 33 is not uniform, and locally high and low sound
pressure portions are mixed, and this pattern must be known in advance by measurement. Can.
[0044]
For example, the equal sound pressure curves indicating the constant sound pressure of each
cross section passing through the axis 81 are classified into several patterns, which are stored in
the pattern generator 90 and are output from the computing unit 89. The signal is displayed on
the screen of the monitor 24 of the ultrasonic observation apparatus 23 by a signal. The
operation of the device shown in FIG. 7 will be described below.
[0045]
After bringing the therapeutic ultrasonic applicator 14 into contact with the surface of the living
body, the ultrasonic probe 22 is used to display an ultrasonic image of the treatment target area
on the monitor 24 of the ultrasonic observation device 23, and the treatment target is Observe
the condition of the site. At this time, as necessary, the position of the therapeutic ultrasonic
applicator 14 is shifted, the ultrasonic probe 22 is rotated, or the like, so that the site to be
treated can be clearly observed.
[0046]
On the other hand, in this state, the rotation of the ultrasonic probe 22 from the reference point
rotates the shaft of the encoder 85 via the pulley 84, the belt 87 and the pulley 86. The output
signal according to the rotation of the axis of the encoder 85 is transmitted to the encoder signal
detection circuit 88 and detected as the rotation angle from the reference point of the ultrasonic
probe 22. This rotation angle is a relative angle to the therapeutic ultrasonic applicator 14, and
by knowing the angle, the observation cross section of the observation ultrasonic probe 22 is
04-05-2019
13
located at any position of the therapeutic ultrasonic sound pressure pattern. You can know if it is.
[0047]
The angle information output from the encoder signal detection circuit 88 is input to the
operation unit 89, where it is determined in advance which of the sound pressure patterns stored
in the pattern generator 90 the angle corresponds to, the pattern Signal to the pattern generator
90 to indicate. The pattern generator 90 sends the instructed sound pressure pattern to the
ultrasonic observation apparatus 23, and displays a sound pressure pattern 91 as shown by a
dotted line in FIG. 7, for example. After comparing the ultrasonic tomogram and the sound
pressure pattern 91 and confirming that the local high sound pressure is not irradiated to the
unintended site, in particular, the bone etc., the treatment ultrasonic wave is irradiated to start
the treatment. It is more effective to rotate the ultrasonic probe 22 and make this check in
various cross sections.
[0048]
According to this apparatus, the ultrasonic tomogram in the ultrasonic wave transmission path
and the sound pressure pattern in the cross section where the tomogram is viewed can be
simultaneously viewed at the same time, so there is no problem due to local concentration of
ultrasonic waves. Can be confirmed, safe and efficient treatment can be performed. FIG. 9 shows
a modification of the device shown in FIG. In FIG. 9, reference numeral 92 denotes a gear
attached to the shaft portion of the observation ultrasonic probe 22, which transmits the rotation
of the ultrasonic probe 22 to the encoder 85 through a gear 93 meshing with the gear 92.
[0049]
The vibrating body 31 is rotatably attached to the housing 32 as a whole, and a gear portion 94
is provided on the inner peripheral surface of the cylindrical portion fitted to the housing 32 in
the vibrating body 31. . The gear portion 94 meshes with a gear 96 provided at the end of the
shaft of the stepping motor 95 fixed to the housing 32. By operating the stepping motor 95, the
vibrator 31 to which the BLT 29 is attached is attached to the housing 32. It can be rotated
against. Reference numeral 97 denotes a motor drive circuit that drives the stepping motor 95 in
accordance with an instruction from the calculation unit 98. The other configuration is the same
04-05-2019
14
as that of the apparatus shown in FIG. The operation of this modification is as follows.
[0050]
Basically, it is the same as the device shown in FIG. 7, but if the sound pressure pattern displayed
on the ultrasonic observation device 23 is not the desired one, the stepping motor 95 is operated
by an input device (not shown). When the vibrator 31 is rotated with respect to the housing 32,
the encoder 85 is fixed to the housing 32, so that the relative rotational angle between the
vibrator 31 and the ultrasonic probe 22 changes, and the output from the pattern generator 90
is Pattern is switched. Thus, the rotation angle of the vibrator 31 may be changed until the
desired pattern is obtained.
[0051]
Further, as a modification of this modification, a desired pattern is set in advance by an input
device (not shown), and a signal is output to motor drive circuit 97 until calculation pattern is
automatically set by operation unit 98. The stepping motor 95 can also be operated. According to
this modification, in addition to the effect of the apparatus of FIG. 7, even when the sound
pressure pattern is not desired, there is an effect that the relative position of the BLT 29 to the
living body can be easily changed so as to become the pattern. The devices shown in FIGS. 7 and
9 can also be applied to the case of a vibrating body other than the one in which the counterbore
38 is formed in the vibrating body 31.
[0052]
FIG. 10 is a schematic view of an ultrasonic therapeutic apparatus 1 according to a second
embodiment of the present invention. The second embodiment is configured substantially the
same as the first embodiment shown in FIG. 1, except for the mechanism for supporting and
fixing the BLT 29. The description of the same components as those of the apparatus of the first
embodiment is omitted. Further, in FIG. 10, only one BLT 29 is shown and the other is omitted.
[0053]
04-05-2019
15
Here, the BLT 29 is fixed by a bolt 39 to the diaphragm 100 having a substantially uniform
thickness, and the diaphragm 100 is further formed by a fastening member 101 such as a screw
in the vibrator 31 after the counterbore 38 is formed. The diaphragm 100 is attached to a
circular opening 103 (formed at the central portion to which the diaphragm 100 to which each
BLT 29 is fixed is attached). In this embodiment, the diaphragm 100 having a substantially
uniform thickness to which the BLT 29 is fixed is integrally attached to the vibrator 31 by
counterbore processing of further forming an opening 103 in the counterbore hole 38.
[0054]
The BLT 29 and the diaphragm 100 may be fixed not only by the fastening member 101 but also
by bonding or the like. Further, although the diaphragm 100 is fixed by the fastening member
101 from the inside of the vibrator 31, it may be fixed from the outside. The operation of the
second embodiment is the same as that of the first embodiment and thus will be omitted. In this
first embodiment, in order to fix the BLT 29 directly to the vibrating body 31, a jig for
attachment is required. However, in the ultrasonic treatment apparatus of this embodiment, the
BLT 29 is vibrated via the vibrating plate 100. In addition to the effects of the first embodiment,
there is an effect that the assembly is further facilitated.
[0055]
Further, in the first embodiment, when each BLT 29 is attached to the counterbore 38, if it is
attempted to set the circular portion of the vibrator 31 in contact with the radiation surface of
the BLT 29 exactly to a uniform thickness, the ultrasonic transmission medium 35 It is also
necessary that at least the circular portion of the side surface is a plane, but in this embodiment,
the surface on the counterbore hole 38 side in contact with the diaphragm 100 may be a plane
(desirably), the ultrasonic transmission medium 35 side The face of the face does not necessarily
have to be a plane, and for example, the face on the ultrasonic transmission medium 35 side may
be a conical face or another curved face. For this reason, it has the advantage of being able to
reduce the number of processing steps for the vibrator 31.
[0056]
Further, the method of attaching the diaphragm 100 to the vibrator 31 enables fine adjustment
of the focusing point. For example, in FIG. 10, ultrasonic wave radiation is achieved by fixing a
04-05-2019
16
thin ring plate between the vibrating body 31 and the diaphragm 100 on one of the two
fastening members 101 along the radial direction with the fastening member 101. You can
change the direction.
[0057]
FIG. 11 is an enlarged view of an essential part of an ultrasonic therapeutic apparatus 1
according to a third embodiment of the present invention. The third embodiment is configured
substantially the same as the second embodiment. That is, instead of the diaphragm 100, a BLT
(hereinafter referred to as F-BLT) 29 'provided with a flange in part is used, and the radiation
surface side of the F-BLT 29' is inserted into the opening 103. The only difference is that they are
fixed.
[0058]
Here, in the F-BLT 29 ', a hole (not shown) is opened in the flange 104, and is fixed to the direct
vibrating body 31 provided with the opening 103 by the fastening member 101. Others are the
same as those of the first embodiment, and therefore, the illustration of the other device
components is omitted and the description thereof is also omitted. The operation of this
embodiment is the same as that of the first embodiment and thus will be omitted. Also, the effect
of this embodiment can be easily assembled while using a small number of parts by using the FBLT 29 '.
[0059]
As described above, according to the present invention, according to the present invention, a
diaphragm having a structure in which the vibration body has a substantially uniform thickness
at an emission surface portion of ultrasonic waves, or a diaphragm having a substantially
uniform thickness Since the structure is fixed to the vibrator, a plurality of BLTs can be reliably
fixed, and a plurality of BLTs can make strong and accurate ultrasonic irradiation possible, and a
dissolution acceleration treatment by ultrasonic waves can be effectively performed.
[0060]
Brief description of the drawings
04-05-2019
17
[0061]
1 is a cross-sectional view showing an ultrasonic applicator in the first embodiment of the
present invention.
[0062]
2 is a plan view showing the structure of the vibrator as viewed from the direction A of FIG.
[0063]
3 is a front view showing the overall configuration of the ultrasonic therapeutic apparatus of the
first embodiment.
[0064]
4 is a perspective view showing a support of the ultrasonic applicator.
[0065]
5 is an enlarged view showing the angle change mechanism of the ultrasonic applicator of FIG.
[0066]
6 is an enlarged view showing a modification of the angle changing mechanism of FIG.
[0067]
7 is a configuration diagram in which the sound pressure distribution state can be displayed in
the first embodiment.
[0068]
8 is a distribution diagram showing an example of the sound pressure distribution detected by
FIG.
[0069]
9 is a configuration diagram showing a modification of FIG.
[0070]
04-05-2019
18
10 is a cross-sectional view showing an ultrasonic applicator in the second embodiment of the
present invention.
[0071]
11 is a cross-sectional view showing the attachment portion to the vibrator of the ultrasonic
applicator in the third embodiment of the present invention.
[0072]
Explanation of sign
[0073]
DESCRIPTION OF SYMBOLS 1 ... Ultrasonic treatment apparatus 2 ... Human body 3 ... Treatment
stand 4 ... Gallbladder 5 ... Stone 6 ... Catheter 10 ... Injection pump 11 ... Suction pump 14 ...
Ultrasonic applicator 15 ... Support arm 19 ... Control unit 20 ... Input / control device 21 ...
support member 22 ... ultrasonic probe 23 for observation ... ultrasonic observation device 24 ...
monitor 29 ... BLT (bolt-clamped Langevin type vibrator) 31 ... vibrating body 32 ... housing 33 ...
film 34 ... ring 35 ... ultrasonic transmission medium 36 ... back cover 38 ... counterbore hole 39
... bolt
04-05-2019
19
Документ
Категория
Без категории
Просмотров
0
Размер файла
33 Кб
Теги
jph04336061
1/--страниц
Пожаловаться на содержимое документа