JP2001061880A - Ultrasonic sound insulation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a temperature rise in a bone by constituting an ultrasonic wave shielding material of an ultrasonic wave absorbing means sealed with oil or the like having an ultrasonic wave absorbing factor higher than an organism and a monitoring control means of a temperature of a sealing substance. SOLUTION: Ultrasonic wave shielding material cases 1-1 to 1-N are formed of flexible polyethylene deformable according to a shape of a body surface, and are constituted by sealing fluid 2 having an ultrasonic wave absorbing factor higher than an organism such as castor oil, and are fixed to a front part of ribs 3-1 to 3-N by an adhesive tape. This fluid 2 having a high ultrasonic wave absorbing factor is stored in a fluid server 4, and is circulated by a circulating tube 5 and a pump 6. A temperature of the circulating fluid 2 is detected by a temperature sensor 8 to control a temperature of the fluid 2 by a heating/ cooling means of a temperature adjusting part 7 on the basis of a detecting temperature. This constitution can prevent can prevent a temperature rise in a bone.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound insulating material for ultrasonic waves in treatment using ultrasonic waves.

[0002]

2. Description of the Related Art The treatment of malignant tumors by convergent ultrasound irradiation from outside the body is less invasive than surgery, and is fundamentally concerned with the loss of physical strength during surgery and the quality of life after surgery. It is thought that it will enhance its social value in the future.

[0003] Biological effects of ultrasonic waves mainly include a thermal effect caused by the absorption of ultrasonic energy by a living body and conversion into heat, and an acoustic cavitation phenomenon in which microbubbles are generated and collapsed by ultrasonic waves. The treatment method and apparatus using the respective actions have been devised.

[0004]

The ultrasonic absorption coefficient of a living body differs depending on the tissue, and the absorption coefficient of bone is about one digit higher than that of soft tissue such as liver. For this reason, the temperature of the bone tends to increase by the irradiation of the ultrasonic wave more than that of the soft tissue, and the treatment may be hindered by an excessive increase in the temperature. For this reason, when irradiating a converged ultrasonic wave from outside the body to an affected part in the body, it is necessary to take care that the ultrasonic wave does not hit the bone.

[0005] For this reason, in the conventional treatment apparatus, the organ to be treated is limited to an affected part which can irradiate an ultrasonic wave from outside the living body so that the focused ultrasonic wave does not hit the bone, and particularly an area surrounded by ribs. Was difficult to treat.

For example, the liver is located below a rib in a healthy person, but when a disease such as a tumor is present, the liver often atrophies and is located at a site surrounded by the rib. For this reason, in the conventional ultrasonic therapy apparatus, there is a problem that the energy of the ultrasonic waves to be irradiated cannot be sufficiently increased because the bone in front of the liver is heated when the liver is treated. Was.

In order to solve this problem, there is a method of using a transducer composed of a group of ultrasonic transducers finely divided, and using only a transducer in a place where the bone is not affected according to an irradiation target. Conceivable. However, in such a method, there is a problem in that the number of ultrasonic transducers to be controlled increases and the apparatus becomes complicated. In addition, the torso is more susceptible to respiration and heartbeat than the head, etc., so the spatial relationship between the oscillator and the bone changes, and the oscillator in a place where the bone is not affected changes over time. It may change.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an ultrasonic sound insulating material which can easily perform a treatment by an ultrasonic wave when a bone exists between an affected part and the ultrasonic wave.

By placing a substance having a high ultrasonic absorption coefficient, such as castor oil, between the living body and the ultrasonic vibrator, it is possible to prevent the above substance from absorbing ultrasonic waves and irradiating the living body with ultrasonic waves. it can. From this, it is conceivable to prevent a rise in bone temperature by arranging a substance having a high ultrasonic absorption coefficient so that ultrasonic waves are not irradiated to the bone existing between the affected part and the ultrasonic waves.

However, when a substance having a high ultrasonic absorption coefficient absorbs ultrasonic waves, the temperature of the substance having a high ultrasonic absorption coefficient rises. Since the absorption coefficient of these substances generally decreases as the temperature increases, the ultrasonic absorption capacity decreases as the temperature increases. For this reason, an ultrasonic absorber having a structure in which a substance having a high ultrasonic absorption coefficient is simply enclosed in a container cannot sufficiently prevent a rise in bone temperature.

[0011]

SUMMARY OF THE INVENTION An ultrasonic sound insulating material according to the present invention comprises an ultrasonic absorbing means in which a substance such as oil having an ultrasonic absorption coefficient higher than that of a living body is enclosed, and monitors and controls the temperature of the substance. And means.

A substance having an ultrasonic absorption coefficient higher than that of a living body
Any form of solid, liquid, or gas may be used, but oils such as castor oil and tung oil are particularly suitable for the purpose of the present invention.

The means for monitoring and controlling the temperature measures the temperature of a substance having a higher ultrasonic absorption coefficient than that of a living body or a part of the body where the sound is to be shielded from an ultrasonic wave, and heats or cools the element according to an offset from an appropriate temperature range. There is no particular limitation as long as it has a means for performing the operation.

The ultrasonic sound insulating material according to the present invention is a substance such as a metal having a specific acoustic impedance significantly higher than that of water.
Alternatively, it is composed of ultrasonic scattering means including a substance such as air having a specific acoustic impedance significantly lower than that of water, and means for monitoring and controlling the temperature thereof.

The substance having a specific acoustic impedance higher or lower than that of water in the present invention can be used in the form of a plate or a tube.

The substance having a specific acoustic impedance higher or lower than that of water in the present invention can be used in a form held in a plate-like or tube-like container.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the ultrasonic sound insulating material of the present invention will be specifically described below, but the present invention is not limited to these embodiments.

(Embodiment 1) An embodiment of an ultrasonic sound insulating material according to the present invention will be described with reference to FIG. The ultrasonic sound insulating material cases 1-1 to 1-N made of a material that can be deformed in accordance with the shape of the body surface, for example, soft polyethylene, contain a fluid 2 having a high ultrasonic absorption coefficient such as castor oil and the like.
It is configured so that it can be fixed to the front of each of 1-3 to N by an adhesive tape (not shown) or the like.

The fluid 2 having a high ultrasonic absorption coefficient enters the fluid server 4 and includes a circulation tube 5 and a pump 6.
It can be circulated. The temperature adjustment unit 7
A heating means for the fluid 2 and a cooling means for the fluid 2 are provided inside, and according to the temperature measured by the temperature sensor 8,
The fluid 2 having a high ultrasonic absorption coefficient can be heated or cooled. Further, feedback on deviation from the temperature range is performed by PID control.

When irradiating ultrasonic waves for treatment, the ultrasonic sound insulating materials 1-1 to 1-N are fixed to the front surface of the ribs, and the ultrasonic waves are circulated through the fluid 2 having a high ultrasonic absorption coefficient.

(Embodiment 2) An embodiment of an ultrasonic sound insulating material according to the present invention will be described with reference to FIG. A tube-shaped ultrasonic sound-insulating material sheath 9-1 to 9-N made of a material that can be deformed according to the shape of the body surface, such as polyethylene, is configured to be able to contain the fluid 2 having a high ultrasonic absorption coefficient such as castor oil. Is configured so that it can be fixed to the pad 11 which is brought into close contact with the body surface by the fixtures 10-1 and 10-2, and the tube-shaped ultrasonic sound insulating material sheaths 9-1 to 9-N are provided only at necessary portions. Can be installed.

Valves 13-1 to 13-N, 13-1 'to 13-N' attached to fluid distributors 12-1 and 12-2.
Is configured to be opened only when joined to the tubular ultrasonic sound insulating material sheaths 9-1 to 9-N. Further, the sheaths 9-1 to 9-N are also provided with valves 13-1 to 13-N and 13-1 '.
１３13-N '. The fluid 2 having a high ultrasonic absorption coefficient enters the fluid server 4 and is configured to be circulated by the circulation tube 5 and the pump 6.

The temperature adjusting unit 7 includes a temperature sensor, a heating unit for the fluid 2 and a cooling unit for the fluid 2. When the temperature of the fluid 2 having a high ultrasonic absorption coefficient deviates from a preset temperature range. Are configured to be able to heat or cool. Further, feedback on deviation from the temperature range is performed by PID control.

When irradiating ultrasonic waves for treatment, the pad 11 is brought into close contact with the body surface, and the ultrasonic sound insulating material sheaths 9-1 to 9-9 are applied.
-N is fixed to the front face of the rib, and the fluid distributors 12-1, 12
-2 valves 13-1 to 13-N, 13-1 'to 13-N'
Is bonded to the ultrasonic sound insulating material sheaths 9-1 to 9-N, and the fluid 2 having a high ultrasonic absorption coefficient is circulated.

(Embodiment 3) An embodiment of an ultrasonic sound insulating material according to the present invention will be described with reference to FIG. The pad 14 with a heat exchange function includes a heat medium 15 and is made of a material that can be deformed according to the shape of the body surface, for example, polyethylene. The heat medium 15 is contained in the fluid server 4 and can be circulated in the pad 14 with a heat exchange function by the circulation tube 5 and the pump 6. It is configured to include water 16 in which aluminum particles having a specific acoustic impedance higher than water are dispersed,
A tube-shaped ultrasonic sound insulating material sheath 9-1 to 9-N made of a material deformable according to the shape of the body surface, for example, polyethylene.
Is configured so that it can be fixed to the pad 14 by the fixtures 10-1 and 10-2, and the tubular ultrasonic sound insulating material sheaths 9-1 to 9-N can be installed only in necessary portions.

The temperature adjusting section 7 includes a temperature sensor and the fluid 2.
Heating means and cooling means for the fluid 2 are provided.
When the temperature of 5 deviates from a preset temperature range, heating or cooling can be performed.
Feedback for deviation from the temperature range is PI
This is configured to be performed by D control. The temperature sensor is
It can also be attached to the pad 14.

When irradiating ultrasonic waves for treatment, the pads 14 are brought into close contact with the body surface, the ultrasonic sound insulating materials 9-1 to 9-N are fixed to the front of the ribs, and the heat medium 15 is circulated. Do.

[0028]

As described above, the use of the ultrasonic sound insulating material of the present invention makes it possible to easily carry out treatment when there is a bone between the ultrasonic irradiation means and the affected part.

[Brief description of the drawings]

FIG. 1 is a perspective view of a sound insulating material showing a configuration of a first embodiment of the present invention.

FIG. 2 is a perspective view of a sound insulating material showing a configuration of a second embodiment of the present invention.

FIG. 3 is a perspective view of a sound insulating material showing a configuration of a third embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Case, 2 ... Fluid with high ultrasonic absorption coefficient, 3 ... Rib, 4 ... Fluid server, 5 ... Circulation tube, 6 ... Pump, 7 ... Temperature control unit, 8 ... Temperature sensor, 9 ... Ultrasonic sound insulation material Sheath, 10 fixture, 11 pad, 13 valve, 1
2 ... fluid distributor, 14 ... pad with heat exchange function, 15 ...
Heat medium, 16: Water in which fine particles having a specific acoustic impedance higher than water are dispersed.

Continuation of the front page F term (reference) 4C060 EE19 JJ13 JJ23 JJ27 4C099 AA01 CA19 JA13 LA23 4C301 FF21 GC21 5D061 AA33 DD06 DD07

Claims (3)

[Claims] 1. An ultrasonic sound insulating material placed between a treatment ultrasonic irradiation means and an affected body surface to be treated by the ultrasonic irradiation means, means for adjusting the temperature of the ultrasonic sound insulating material and monitoring the temperature. An ultrasonic sound insulating material, comprising: 2. The ultrasonic sound insulating material according to claim 1, wherein the sound insulating material contains a substance having an ultrasonic absorption coefficient higher than that of water. 3. The ultrasonic sound insulating material according to claim 1, wherein the sound insulating material includes a substance having an ultrasonic reflection coefficient higher than that of water.