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JP2014161434

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DESCRIPTION JP2014161434
The present invention relates to an ultrasonic fracture treatment apparatus for promoting the
healing of a fracture by irradiating the fracture site with ultrasonic waves from outside the body,
and the treatment by the ultrasonic stimulation can be widely applied to fracture patients in
various circumstances. Provided is an ultrasonic fracture treatment apparatus. SOLUTION: An
ultrasonic transducer 20 having a plurality of transducers 21 arranged to be responsible for
conversion of energy between electric energy and ultrasonic energy, and a plurality of super
waves transmitted by a plurality of transducers 21. A patient suffering from a fracture,
generating a plurality of electrical pulses whose relative delay amounts are adjusted according to
a set delay profile so that an ultrasonic pulse beam by a set of acoustic pulses is transmitted. The
ultrasonic transducer 20 transmits an ultrasonic pulse beam into the patient's body by applying
each of a plurality of electric pulses to each of the plurality of transducers 21 constituting the
ultrasonic transducer 20 addressed to 2. And a unit 11. [Selected figure] Figure 1
Ultrasonic fracture treatment device
[0001]
The present invention relates to an ultrasonic fracture treatment apparatus that applies
ultrasonic waves to a fracture site from outside the body to promote healing of the fracture.
[0002]
It has been known that the application of ultrasonic stimulation to a fracture site accelerates the
healing of the fracture, and an ultrasonic fracture treatment apparatus has been developed which
applies ultrasonic waves to the fracture site.
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[0003]
For example, in Patent Literatures 1 and 2, by providing means for detecting separation of an
acoustic impedance matching layer and temperature detection means, it is detected whether
ultrasonic waves are reliably emitted from the ultrasonic wave irradiation means toward the
inside of the body. Ultrasound treatment device having the function of
[0004]
In Patent Documents 3 and 4, the ultrasonic wave is irradiated to the affected area by providing
an ultrasonic transducer for receiving the ultrasonic wave reflected by the affected area
separately from the ultrasonic transducer for irradiating the ultrasonic wave toward the affected
area from outside the body. There is disclosed a treatment apparatus having a function of
confirming the health of the patient and diagnosing a healing effect.
[0005]
Furthermore, Patent Document 5 includes a plurality of ultrasonic transducers, generates a
plurality of independent ultrasonic stimulation pulses within the same time, and simultaneously
performs a plurality of diseased portions simultaneously within a predetermined treatment time.
A therapeutic device with ultrasound stimulation is disclosed that is capable of performing
ultrasound stimulation therapy.
[0006]
Patent Document 1: JP-A-2004-154304 Patent Document 2: JP-A-2005-270510 Patent
Document 2: International Patent Publication WO 2008/018612 Patent Document 2: JP-A 2001299772 Patent Document 2: JP-A 7-108054
[0007]
In many fracture patients, cast bandages are applied to fix the fracture site so as not to move
carelessly, and there is a problem that it is difficult to treat with ultrasound.
[0008]
An object of this invention is to provide the ultrasonic fracture therapeutic device which can
apply widely the treatment by ultrasonic stimulation to the fracture patient of various
circumstances in view of the above-mentioned situation.
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[0009]
An ultrasonic fracture treatment apparatus according to the present invention for achieving the
above object comprises: an ultrasonic transducer comprising a plurality of transducers arranged
in order to convert energy between electrical energy and ultrasonic energy; In order to transmit
an ultrasonic pulse beam by a set of a plurality of ultrasonic pulses transmitted by the child, a
plurality of electric pulses whose relative delay amounts are adjusted according to a set delay
profile are generated And transmit an ultrasonic pulse beam to the ultrasound transducer by
applying each of a plurality of electric pulses to each of a plurality of transducers constituting an
ultrasound transducer addressed to a patient suffering from a fracture. And a wave transmitting
unit.
[0010]
Since the ultrasonic fracture treatment device of the present invention transmits an ultrasonic
pulse beam traveling in the direction according to the above-mentioned set delay profile, for
example, it travels obliquely toward the fracture site from a position avoiding the cast bandage A
variety of usage methods are possible, such as generating an ultrasonic pulse beam to apply
ultrasonic stimulation to the fracture site or cyclically applying ultrasonic stimulation to the
entire fracture affected area when the fracture affected area is spread. This ultrasonic fracture
treatment device can be widely applied to fracture patients in various circumstances.
[0011]
Here, in the ultrasonic fracture treatment apparatus of the present invention, the ultrasonic
fracture treatment device includes an operation unit that receives an operation for instructing the
direction of an ultrasonic pulse beam transmitted from the ultrasonic transducer, and the
transmission unit receives the operation received by the operation unit. Preferably, the plurality
of electrical pulses are generated in accordance with a delay profile corresponding to the
direction of the instructed ultrasonic pulse beam.
[0012]
The direction of the ultrasonic pulse beam is, for example, a hospital or the like, a leader who is
used to this ultrasonic fracture treatment device in the hospital from the geometrical relationship
such as the position of the ultrasonic transducer and the fracture site on the body surface. May
be set fixedly, and the patient himself may use this ultrasonic fracture treatment apparatus as
taught, but with the above operation part, the patient himself can be operated and usability
improves Do.
[0013]
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Alternatively, in the ultrasonic fracture treatment apparatus according to the present invention,
the transmission unit may sequentially sequentially correspond to cyclically different directions
of ultrasonic pulse beams transmitted by the ultrasonic transducer. By sequentially generating a
plurality of sets of electrical pulses according to different delay profiles and sequentially applying
them to a plurality of transducers constituting the ultrasonic transducer, ultrasonic waves having
different directions directed circularly sequentially to the ultrasonic transducer It is also a
preferred embodiment to transmit a pulse beam.
[0014]
Patients are often unfamiliar with the usage of this ultrasonic fracture treatment device, and even
if they intend to apply ultrasound to the fracture site, it is conceivable that the ultrasound is
deviated from the fracture site.
[0015]
Therefore, if a configuration in which the ultrasonic pulse beam is cyclically sequentially
transmitted in different directions as described above is adopted, ultrasonic waves can be reliably
applied to the fracture site.
[0016]
Here, the operation unit is configured to receive an operation to designate the angular range of
the direction of the ultrasonic pulse beam sequentially transmitted from the ultrasonic
transducer, and the transmission unit is an ultrasonic pulse beam transmitted by the ultrasonic
transducer. A plurality of sets of electrical pulses are sequentially generated according to
cyclically different delay profiles corresponding respectively to cyclically different directions
within the angular range instructed by the operation received by the operation unit. By
sequentially applying to the plurality of transducers constituting the ultrasonic transducer, the
ultrasonic transducer transmits ultrasonic pulse beams having different directions cyclically
sequentially within the above-mentioned angle range. Is preferred.
[0017]
When the above-described operation unit is configured to set an angle range in which the
direction of the ultrasonic pulse beam is cyclically changed, a patient who is used to the
ultrasonic fracture treatment apparatus or ultrasonic waves are transmitted perpendicularly to
the fracture site. Patients who should do so should narrow this angle range, and in the case of
patients who need to apply ultrasonic waves obliquely to the fracture site and can not clearly
know the angle at which the ultrasound is reliably applied to the fracture site, extend the angle
range, etc. Usage that suits the patient is possible.
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[0018]
Furthermore, in this case, the time from the start of transmission of the ultrasonic pulse beam is
measured, and transmission of the ultrasonic pulse beam is stopped when the time reaches a
time determined according to the above-mentioned angular range. Preferably, further comprising
a timer.
[0019]
The medical device may be provided with a timer so as to be forcibly stopped when a
predetermined time elapses, so that measures may be taken to prevent unnecessary long-term
use.
[0020]
When the ultrasonic pulse beam is cyclically sequentially transmitted in different directions, the
time at which the ultrasonic waves impinge on one place in the patient will differ depending on
the above-mentioned angular range.
Here, appropriate management of the treatment time is performed by varying the time until the
operation of the ultrasonic pulse beam is stopped according to the above-mentioned angle range.
[0021]
According to the ultrasonic fracture treatment apparatus of the present invention described
above, treatment by ultrasonic stimulation can be widely applied to fracture patients in various
circumstances.
[0022]
It is a block diagram showing a schematic configuration of an ultrasonic fracture treatment
apparatus as an embodiment of the present invention.
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It is a schematic diagram which shows the relationship between a delay profile and an ultrasonic
pulse beam.
It is a figure showing an example of a display mode on a display.
It is a schematic diagram of the scan by an ultrasonic pulse beam.
[0023]
Hereinafter, embodiments of the present invention will be described.
[0024]
FIG. 1 is a block diagram showing a schematic configuration of an ultrasonic fracture treatment
apparatus according to an embodiment of the present invention.
[0025]
The ultrasonic fracture treatment device 1 shown in FIG. 1 includes a treatment device main
body 10 and an ultrasonic transducer 20.
[0026]
The ultrasonic transducer 20 is applied to the body surface of the patient 2.
The ultrasonic transducer 20 is configured of an array of a plurality of transducers 21.
Each of the plurality of transducers 21 transmits ultrasonic pulses.
The ultrasonic pulse transmitted from each of the plurality of transducers 21 forms an ultrasonic
pulse beam as a whole to give ultrasonic stimulation to the fracture site 3.
[0027]
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Each transducer 21 constituting the ultrasonic transducer 20 is vibrated by the ultrasonic wave
reflected back within the body of the patient 2 and generates an electrical signal according to the
vibration.
[0028]
The treatment device main body 10 is provided with a plurality of transmitting and receiving
units 100 corresponding to a plurality of transducers 21 constituting the ultrasonic transducer
20 in a one-to-one manner.
Each transmission / reception unit 100 includes a pulse transmitter 11, a capacitor 12, a diode
pair 13, a preamplifier 14, a variable gain amplifier 15, and an A / D converter 16.
Furthermore, the treatment device main body 10 includes a delay control unit 101, a delay
addition unit 102, a CPU 103, an operation element 104, a timer 105, and a display 106.
[0029]
The pulse transmitter 11 receives the timing signal from the delay control unit 101 and applies
an electric pulse to the corresponding vibrator 21.
Then, the transducer 21 converts the electric energy of the electric pulse into ultrasonic
vibrational energy and transmits the ultrasonic pulse into the patient 2's body.
Although details will be described later, an ultrasonic pulse beam is formed by a set of ultrasonic
pulses transmitted respectively from a plurality of arranged transducers 21 and travels inside the
patient 2 The capacitor 12 and the diode pair 13 The electric pulse output from the transmitter
11 is applied to the preamplifier 14 as it is to prevent the preamplifier 14 from being broken.
[0030]
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The ultrasonic waves transmitted from the ultrasonic transducer 20 into the body of the patient
2 are reflected inside the patient 2 and a part thereof is returned to the ultrasonic transducer 20
to vibrate the respective transducers 21 constituting the ultrasonic transducer 20. Let
Each transducer 21 picks up the vibration due to the reflected ultrasonic wave by converting the
vibrational energy into electric energy.
The electric signal obtained by picking up the vibration by each vibrator 21 is converted to the A
/ D converter of the next stage by the preamplifier 14 and the variable gain amplifier 15 which
constitute each transmission / reception unit 100 corresponding to each vibrator 21. The signal
is amplified to be a signal having an amplitude suitable for A / D conversion at 16.
The electric signal output from the variable gain amplifier 15 is an analog electric signal, and the
electric signal is input to the A / D converter 16, converted into a digital signal, and input to the
delay adder 102.
Although the details of the operation of the delay addition unit 102 will be described later, the
delay addition unit 102 integrates a plurality of signals obtained by the pickup of ultrasonic
vibrations in the plurality of transducers 21 to form the body of the patient 2. Generating a signal
representative of the ultrasound reflectivity distribution of
[0031]
The signal obtained by the delay addition unit 102 is input to the CPU 103, and the CPU 103
generates an image based on the signal and causes the display 106 to display the image.
[0032]
The patient 2 can confirm that the ultrasonic wave is applied to the fracture site 3 or the like by
referring to the image displayed on the display 106.
[0033]
The operator 104 is a user interface for inputting an instruction of an operator such as the
patient 2 to the ultrasonic fracture treatment apparatus 10.
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Further, the timer 105 measures the time from the start of ultrasonic wave transmission into the
body of the patient 2 and instructs to stop the ultrasonic wave when a predetermined time has
elapsed.
[0034]
Next, the delay control unit 101 and the delay addition unit 102 will be described.
[0035]
The delay control unit 101 receives an instruction from the CPU 103, and controls the timing of
electric pulse output from each pulse transmitter 11 provided in each of the plurality of wave
transceivers 100 according to a predetermined delay profile (described later).
Then, the ultrasonic transducer 20 consisting of a set of a plurality of arranged transducers 21
transmits an ultrasonic pulse beam having a focus in a direction according to the delay profile
and at a depth according to the delay profile Be done.
In this case, for example, as shown in FIG. 1, an ultrasonic pulse beam is emitted from the
ultrasonic transducer 21 in an oblique direction.
[0036]
FIG. 2 is a schematic view showing the relationship between the delay profile and the ultrasonic
pulse beam.
[0037]
A plurality of transducers 21a, 21b, 21c, ..., 21n-1 and 21n are arranged here.
Here, it is considered to transmit an ultrasonic pulse beam having a focal point at one point O1 in
the patient 2's body.
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At this time, an arc 22 whose center is the focal point O1 and whose radius is a line connecting
the oscillator 21n closest to the focal point O1 among the oscillators 21a, 21b, 21c, ..., 21n-1,
21n is a radius When drawn, the transducers 21a, 21b, 21c,... Are separated from their arcs 22
by distances da1, db1, dc1.
[0038]
Therefore, in each of the transducers 21a, 21b, 21c,..., The time ta1, tb1, t1 and tb1 traveled by
the ultrasonic waves by the distances da1, db1, dc1. An electric pulse is applied at each timing
preceding by tc1.
[0039]
In other words, based on the time of applying the electric pulse to the vibrator 21a, the electric
pulse is applied to the vibrator 21b at a timing delayed by the time (ta1-tb1) at which the
ultrasonic wave travels by the distance difference (da1-db1). Apply an electric pulse to the
transducer 21c at a timing delayed by the time (ta1-tc1) at which the ultrasonic wave travels by
the distance difference (da1-dc1), and the time (ta1) at which the ultrasonic wave travels by the
distance difference An electric pulse is applied to the vibrator 21 n at a timing delayed by −0).
In this case, the ultrasonic pulses transmitted from the transducers 21a, 21b, 21c, ..., 21n-1, 21n
interfere with each other, pass through the focal point O1, and have the narrowest beam
diameter at the focal point O1. An ultrasonic pulse beam B1 traveling in the two bodies is
generated.
Such a set of delays of electric pulses applied to the transducers 21a, 21b, 21c,..., 21n-1, 21n is
referred to as a transmission-side delay profile.
[0040]
Similarly, to generate an ultrasonic pulse beam B2 passing through the focal point O2, an arc 23
is drawn with the focal point O2 as the center and the radius between the focal point O2 and the
transducer 21c closest to the focal point O2 as a radius.
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Then, the delay profile is determined in consideration of the time that the ultrasonic wave travels
by the distance da2 between the arc 23 and each of the transducers 21a, 21b, ..., and the delay
profile is determined and applied to each of the transducers 21a, 21b, 21c, ... Are delayed
according to the delay profile and then applied to each of the transducers 21a, 21b, 21c,.
By doing this, an ultrasonic pulse beam B2 which is narrowed to the narrowest diameter at the
focus O2 is generated toward the focus O2.
[0041]
By performing delay control according to the delay profile in this manner, it is possible to
transmit an ultrasonic pulse beam obliquely into the body of the patient 2.
It is also possible to scan the inside of the patient 2 with an ultrasonic pulse beam by performing
delay control according to the delay profile while cyclically changing the delay profile
sequentially.
[0042]
Further, the delay addition unit 102 receives an electrical signal that has been converted into a
digital signal by each A / D converter 16 of the plurality of transmission / reception units 100.
The delay adder 102 relatively delays the plurality of input electrical signals according to a
predetermined delay profile and adds them to each other.
In this way, an image in the patient's body by reflected ultrasound is generated.
[0043]
Here, the delay profile on the receiving side will be described with reference to FIG. 2 again.
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[0044]
The ultrasonic waves reflected at the point O1 (not necessarily at the focal point) and returned
toward the transducers 21a, 21b, 21c, ..., 21n-1, 21n are those transducers 21a, 21b, 21c, ... ,
21n-1 and 21n, consider the timing when the oscillator 21n closest to the point O1 is reached.
At this time, the reflected ultrasonic waves directed to the transducers 21a, 21b, 21c,... Excluding
the transducers 21n are respectively at distances da1, db1, dc1,.
Therefore, the electric signal obtained by picking up the ultrasonic wave by the vibrator 21 n is
delayed until the ultrasonic wave reaches the vibrator 21 a where the ultrasonic wave reaches
the latest.
Further, for example, the transducer 21c is delayed by the time when the ultrasonic wave travels
the distance difference (da1-dc1), and the transducer 21b is delayed by the time when the
ultrasonic waves travel the distance difference (da1-db1).
[0045]
When electric signals obtained by picking up ultrasonic waves by the respective transducers 21a,
21b, 21c, ..., 21n-1, 21n are respectively delayed in this way and added to each other, the electric
information which captures the reflection information at the point O1 A signal is generated. With
regard to the reflected ultrasonic wave from the point O2, the delay of the electric signal
obtained by each of the transducers 21a, 21b, 21c,... May be considered in consideration of the
arc 23 instead of the arc 22. A set of such electrical signal delays is referred to as a receiver
delay profile.
[0046]
When the delay profile in the delay control unit 101 and the delay profile in the delay addition
unit 102 are cyclically changed to scan the patient's body with an ultrasonic pulse beam, a
tomographic image in the patient's body can be obtained. An electrical signal representing an
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image (tomographic image) generated in this manner is sent to the display 106, and the image
(tomographic image) is displayed on the display 106.
[0047]
FIG. 3 is a diagram showing an example of a display mode on the display.
[0048]
Here, a tomogram inside a patient's body, that is, a B-mode image in an ultrasound diagnostic
apparatus is shown.
The B mode image includes the image 3 ′ of the fracture site 3 of the patient 2.
[0049]
When such a B-mode image is displayed on the display 106, the patient confirms the image 3 'of
the fracture site 3 and knows that ultrasound is applied to the fracture site 3 and the degree of
healing of the fracture. Can.
[0050]
In the manipulator 104, "fixed" repeatedly transmits an ultrasonic pulse beam from the
ultrasonic fracture treatment device 10 in the same direction in the patient's body, and "scan" for
scanning the patient's body with the ultrasonic pulse beam. Switching is performed.
Furthermore, in the case of fixed , the operator 104 indicates and inputs an angle θ1 of the
transmission of the ultrasonic pulse beam with respect to the direction of the ultrasonic
transducer 20. Thus, for example, even in a patient whose bone fracture site is compacted with a
cast bandage, the ultrasonic pulse beam can be transmitted obliquely toward the bone fracture
site from a position avoiding the cast bone bandage.
[0051]
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At this time, the timer 105 measures a time (for example, 15 minutes) corresponding to
fixed from the start point of ultrasonic pulse beam transmission. When the timer 105 times
out, a signal indicating that the time is up is transmitted to the CPU 103, and the CPU 103 stops
outputting the timing signal of electric pulse generation toward the pulse transmitter 11 to the
delay control unit 101. Instruct them to Thereby, transmission of the ultrasonic pulse beam to
the patient 2 is stopped.
[0052]
Further, when "scan" is designated by the operation element 104, the scan angle range θ2 is
further designated.
[0053]
FIG. 4 is a schematic view of scanning with an ultrasonic pulse beam.
[0054]
As described above, when the delay profile is cyclically and sequentially changed, an ultrasonic
pulse beam can be scanned in the body of the patient 2.
Here, the angular range θ2 of the scan is specified.
Then, the CPU 103 transmits the angle range to the delay control unit 101, and the delay control
unit 101 cyclically scans a plurality of delay profiles corresponding to the angular range so as to
scan the ultrasonic pulse beam only within the angular range. Delay control is used sequentially.
Then, the body of the patient 2 is scanned within the designated angular range.
[0055]
At this time, the CPU 103 sets the time corresponding to the designated angle range to the timer
105 and starts the timer 105. The timer 105 measures time and transmits a time-up signal to the
CPU 103 when the set time is reached. When the CPU 103 receives this time-up signal, it
controls the delay control unit 101 to stop the transmission of the ultrasonic pulse beam in the
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same manner as described above.
[0056]
When the patient's body is scanned with an ultrasonic pulse beam, the ratio of time in which the
ultrasound is irradiated to the same location in the patient's body to the unit time decreases as
the angular range of the scan increases. Therefore, here, the ultrasonic pulse beam is transmitted
for an appropriate time according to the angular range.
[0057]
As described above, when the body of the patient 2 is scanned with an ultrasonic pulse beam, for
example, a patient who is not familiar with the treatment of the ultrasonic fracture treatment
device 1 does not notice that the ultrasonic waves are out of the fracture site, and the treatment
is effective. It is possible to prevent mistakes such as not rising. Also, in the case of a patient
whose fracture site has spread, scanning can uniformly apply ultrasound to the wide fracture
site.
[0058]
1 ultrasonic fracture treatment device 2 patient 3 fracture site 3 'fracture site image 10
treatment device body 11 pulse transmitter 12 capacitor 13 diode pair 14 preamp 15 variable
gain amplifier 16 A / D converter 20 ultrasonic transducer 21 transducer 100 transmission and
reception Part 101 Delay control part 102 Delay addition part 103 CPU 104 Operator 105 Timer
106 Display
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