JPS62192158A - Ultrasonic therapy apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an ultrasonic treatment device that performs treatment using ultrasonic energy.

[Technical background of the invention and dark spots]

Ultrasonic energy has excellent ability to penetrate deeply into the human body and focus energy, and is used in hyperthermia devices that treat cancer by heating it, and calculus that crushes stones by concentrating all energy from outside the body on stones inside the body. Recently, it has come to be used for crushing equipment pieces, etc. When used in such devices.

■Ultrasonic waves hardly propagate in the air.

■When driving ultrasonic consonants with high power, the ultrasonic transducer itself becomes high temperature and needs to be cooled. ■The skin of the living body also becomes high temperature and needs to be cooled. For these reasons, a method is often used in which a liquid (such as water) with an appropriate acoustic impedance is interposed between the ultrasound transducer and the living body.

In an ultrasonic treatment device using this method, for example, using hyperthermia, a water bag is placed over the area to be heated, an ultrasonic transducer is placed in the water bag, and an ultrasonic wave is applied. radiates downward. In this way, even if there are irregularities on the body surface of the living body, the water bladder changes its shape accordingly, so that ultrasonic waves can be emitted effectively. However, when an ultrasonic sensor is driven with high power, the propagation of ultrasonic waves is prevented by the formation of air bubbles in the water (cavitation).

Sometimes the energy is not emitted effectively into the living body. Conventionally, brackish water was sufficiently degassed to prevent cavitation, but once cavitation silane occurs, even if the power is lower than that at that time, the core remains and cavitation becomes more likely to occur. Therefore, there is a problem that a degassing operation is required and the treatment is interrupted.

[Purpose of the invention]

An object of the present invention is to provide an entire ultrasonic treatment device that supplies deaerated water without interrupting treatment even if cavitation occurs.

[Summary of the invention]

The container of the ultrasonic treatment device has multiple storage and deaeration tanks for supplying deaerated water, and one side performs circulation operation and the other side performs deaeration operation at the same time, and the tank is closed at regular intervals or when cavitation occurs. The switch always supplies fresh degassed water into the container of the ultrasound therapy it.

〔Effect of the invention〕

The inside of the container of the ultrasonic treatment device is always filled with sufficiently degassed water, which is necessary for the ninth treatment, which allows the frequency of cavitation to occur and the amount of ultrasonic power supplied until cavitation occurs to be high. This makes it possible to obtain a certain amount of ultrasonic strength, allowing efficient treatment. Furthermore, even if cavitation should occur, it is possible to switch to new degassed water, making it possible to continue treatment without interruption.

[Embodiments of the invention]

FIG. 1 shows the configuration of an example of an ultrasonic treatment device #Wono Hyperthermia according to an embodiment of the present invention.

A container 2 is provided in contact with the body surface of a living body 1, and an ultrasonic transducer 3 is disposed within the container 2.

The container 2 is sealed with a rubber membrane 4, and degassed water 5 is circulated inside through an inlet 61 and an outflow lower. The degassed water 5 is used to match the acoustic impedance between the ultrasound transducer 3 and the living body 1, and to suppress the temperature rise on the surface of the living body 10 and the temperature rise of the ultrasound transducer itself.

The ultrasonic transducer 3 is connected to a drive circuit (not shown) and driven by continuous waves or the like, and is used to heat and treat the abscess 8 within the living body 1.

As shown in FIG. Valve 14° Bump 9.
Inlet of container 2 6. Outflow lower 1. It circulates through the inlet port 15 of the storage/deaeration tank All with a 10° valve. On the other hand, at this time, the storage/deaeration tank 1312 is connected to the valve 1 through the exhaust port 16.
It is connected to a deaeration pump 19 via 7 to carry out deaeration operations under pressure.

At this time, the inside of the storage/deaeration tank 11 is opened to atmospheric pressure by a valve 18, and the rubber membrane 4 sealing the container 2 is prevented from being stretched by pressure proofing.

The valve controller 2 switches the storage/deaeration tanks All and B12t through these valves 10, 14, 17, and 18'.
It is 0. The valve controller 20 includes a timer 21 that issues instructions at regular intervals, or a manual changeover switch 22 that is operated by a doctor or nurse when cavitation occurs. a of valves 10, 14, 17, 18 is instructed via OR circuit 23e.
(direction shown) and b.

The timer 21 issues a switching instruction every time (for example, 20 minutes) determined by the deaeration efficiency corresponding to the capacities of the storage/deaeration tanks All and B12 and the capacity of the deaeration pump 19, and the heat treatment time.

New deaerated water is always supplied into the container 2 by this switching at regular intervals.

[Other embodiments of the invention]

In this example, the doctor or nurse visually judged the occurrence of cavitation in the water bag and used a manual switch to switch between the container for depressurizing and the container for circulating the liquid. A ninth embodiment of detecting and switching is shown in FIG.

While the ultrasonic transducer 3 is being continuously driven by the driving circuit 100, the incident wave/reflected wave power measuring section 101
What is the incident power and reflection to the ultrasonic transducer 3? d force is being measured. In normal cases, the reflected power is almost zero because the reflection coefficient of water is small.

However, when cavitation occurs in the water bag, air bubbles adhere to the ultrasonic transducer 3 and the reflection coefficient of the bubbles is large, resulting in a large reflected power.

The incident power and reflected power obtained by the incident wave/reflected wave power measurement section 101 are supplied to the cavitation detection section 102, and the presence or absence of cavitation is determined by the logic described above. At this time, an instruction is issued to the pigeon house in which cavitation has been detected by the cavity detection unit 102 and to the valve controller 20 to switch between a container for depressurization and a container for circulating liquid, and the containers are automatically switched.

Furthermore, in the embodiments, the treatment was explained using an example of hyperthermia, but the effect is the same even if a stone crushing device is used, and the treatment is not limited in any way.

[Brief explanation of drawings]

8g1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of another embodiment of the present invention. l...Living body 2...Container Total
・Ultrasonic vibrator 4...Rubber membrane 5...Deaerated water 6...Inflow lower...Outlet
8... Tumor fl, 9... Pump 16...
Exhaust port 17...Valve 18...Valve 22
...Manual changeover switch 23...OR circuit 1009
．． , drive circuit 101...incident wave/reflected wave 1f
Force measurement unit 102...Cavity stomach detection unit Representative Patent attorney Noriyuki Chika Yudo Kikuo Takehana Figure 2

Claims (3)

[Claims] (1) In an ultrasonic treatment device that includes a water bag that comes into contact with a living body, a liquid contained in the water bag, and an ultrasonic transducer that emits ultrasonic waves to the living body via this liquid, the liquid a means for circulating liquid from these containers to the water bag; a means for reducing the pressure in the container; and when the first container is being reduced in pressure by the pressure reducing means. means for switching the liquid in the second container to circulate to the water bladder and the liquid in the first container to circulate to the water bladder when the second container is under reduced pressure; An ultrasonic treatment device that is characterized by: (2) The ultrasonic treatment apparatus according to claim 1, wherein the means for switching between the container for reducing pressure and the container for circulating liquid is provided at regular intervals. (3) The scope of the claim characterized in that the means for switching between the container for depressurizing and the container for circulating liquid includes means for detecting the occurrence of cavitation in the water bag, and the detection is made by the detection means. The ultrasonic treatment device according to item 1.