JPH0611007Y2 - Electrode structure of high-frequency hyperthermia device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an electrode structure of a high-frequency thermotherapy apparatus for applying a high-frequency voltage to a cancer tissue of a patient to perform heat treatment.

(B) Conventional Technology FIG. 4 is a sectional view showing an example of an electrode structure of a conventional high-frequency thermotherapy device.

In this electrode structure (applicator consisting of an electrode and a liquid storage bag), a cylindrical portion 62 having a diameter smaller than the diameter of the mounting plate 61 is projectingly provided in the surface of a disc-shaped liquid bag mounting plate 61. The disk-shaped electrode 63 is arranged in the. That is, the electrode mounting shaft portion 64 of the electrode 63 is fixed so as to penetrate the mounting plate 61. Then, the opening end portion of the liquid bag 65 is brought into contact with the outer peripheral edge portion of the mounting plate 61 (outside the tubular portion 62), and the tubular portion 62
A collar plate-shaped ring body 66 having an inner hole corresponding to the outer diameter is fitted to the mounting plate 61, and the liquid bag 6 is fixed by a bolt 67.
5 is fixed to the mounting plate 61.

At the time of treatment, the electrode mounting shaft of this electrode structure (applicator) is mounted on the electrode mounting body (not shown) of the apparatus main body. Then, a pair of applicators is arranged on the affected area so as to face the skin surface of the affected area. That is, the liquid bag is placed in contact with the skin surface. On the other hand, in the liquid bag, a cooling liquid is circulated through a liquid plug provided on the mounting plate to cool and protect the skin surface. In this state, a high-frequency voltage is applied between both electrodes via the electrode mounting body to heat-treat the affected area.

(C) Problems to be solved by the device Since the liquid bag of the electrode structure (applicator including the electrode and the liquid bag) is a member that directly contacts the surface of the living body,
It is usually made of a flexible polymer material such as thin rubber, soft vinyl chloride, or silicone. Therefore, the liquid bag is liable to be deteriorated over time, dirty due to use, or damaged, and needs to be replaced frequently.

However, the conventional liquid storage bag is often firmly fixed to the mounting plate with a bolt or a fastening method such as adhesive fixing. For this reason, for example, when the necessity of exchanging the liquid storage bag arises during treatment, there is a disadvantage that the exchanging work cannot be executed simply and quickly by the clinical operator (doctor etc.).

An object of the present invention is to provide an electrode structure of a high-frequency thermotherapy device that can easily and quickly replace a liquid storage bag.

(D) Means and Actions for Solving the Problems In order to achieve this object, the electrode structure of the high-frequency hyperthermia treatment apparatus of the present invention has the following configuration.

The electrode structure of the high-frequency hyperthermia treatment device has a tubular main body having a fitting groove portion provided in a proper position on the outer peripheral portion, an electrode provided in the tubular main body, and a reduced diameter that is fitted into and removed from the fitting groove portion of the tubular main body. And a fixing means that is provided corresponding to the tubular body and is movable with respect to the tubular body and that presses and fixes the rib portion that fits in the groove portion. ing.

In the electrode structure having such a configuration, the diameter of the thick rib portion provided in the liquid storage bag is set to be smaller than the fitting groove diameter provided around the outer peripheral portion of the cylindrical body, that is, the groove circumferential diameter. ing. Therefore, when the liquid storage bag is attached, the rib portion is pulled and the diameter thereof is expanded, and the liquid storage bag is fitted into the fitting groove portion of the tubular main body. Further, the fixing means provided in the tubular body is, for example, a pressing plate having a flange portion that is fitted to the protruding cylindrical portion for pulling out the attachment shaft of the electrode provided in the tubular body to the outside, Similarly, it is composed of a pressing ring body screwed to the outer peripheral threaded portion of the protruding cylindrical portion.
The pressing plate is pressed against the tubular main body by the pressing ring body screwing with respect to the protruding cylindrical portion, and the flange portion presses and fixes the rib portion in the fitting groove portion.

Further, an elastic body (pusher pad) for urging the pressing plate toward the pressing ring body is provided between the contact surfaces of the pressing plate and the tubular body. Therefore, the pressing plate is pressed against the urging force of the elastic body, and conversely, when the pressing force is released by the reverse rotation of the pressing ring body, the pressing plate is moved by the elastic body to the original position. To return to the pressing ring body side. As a result, the rib portion in the fitting groove portion can be easily taken out and taken out. Thus, the liquid storage bag can be easily and quickly attached and detached by simply moving the pressing ring.

(E) Example FIG. 3 is a perspective view showing a high frequency thermotherapy device.

In the high-frequency hyperthermia treatment device 5, a curved C-shaped arm 52 is rotatably provided between a pair of support members 51 that are installed to face each other, and an electrode attachment body is provided at each end of the C-shaped arm 52. 53 are fixed to face each other. Then, the electrode structure of this invention, that is, the electrode 1
An applicator consisting of the liquid storage bag 2 and the liquid storage bag 2 is attached.

FIG. 1 is an enlarged view of an essential part of a partial sectional view showing a specific embodiment of the electrode structure of the high-frequency thermotherapy apparatus according to the present invention.

The electrode structure includes a tubular body 3, an electrode 1 arranged on the tubular body 3, a liquid storage bag 2 detachably attached to the tubular body 3, and the liquid storage bag 2 in the tubular body. 3 and a fixing means 4 which can be easily attached and detached.

The tubular main body 3 is formed of a synthetic resin material, and a short tubular portion 32 having an outer diameter equal to the disc diameter is projectingly provided on the inner surface side of the circular disc portion 31. A flange portion 33 that projects to the outside is provided. Then, in the in-plane central portion of the disc portion 31, a cylindrical portion 34 protruding toward the opposite side from the protruding side of the cylindrical portion 32.
Is projected. The cylindrical portion 34 inserts and fixes the electrode mounting shaft 11 of the electrode 1 described later. Further, a through hole 35 for introducing a cooling liquid is opened in the outer peripheral portion of the disc portion 31, and a plug 36 for circulating a cooling liquid is connected to the through hole 35. Further, a sponge pad ring 37 is attached to the inner surface side of the flange portion 33. In addition, the flange portion 33
At the base end portion of the above, that is, the connection portion between the flange portion 33 and the disc portion 31, there is provided a fitting groove portion 38 into which the rib portion 21 of the liquid storage bag 2 to be described later is fitted and removed.

The electrode 1 is a disc having a diameter slightly smaller than the diameter of the cylindrical portion 32,
An electrode mounting shaft portion 11 is provided so as to project in the central portion of the surface. The electrode 1 is fixed in a state where the electrode mounting shaft portion 11 penetrates the cylindrical portion 34 and is positioned inside the cylindrical portion 32. The electrode attachment shaft portion 11 protruding outward is attached to the electrode attachment body 53 shown in FIG. 3, and is electrically connected to a high frequency power supply member (not shown) of the electrode attachment body 53 to form the electrode 1 It is set to supply high frequency to.

The liquid bag 2 is formed of a flexible stretchable material such as silicone rubber or latex rubber into a bag body, and an opening peripheral edge of the bag body is provided with a thick rib portion 21 having a reduced diameter. That is, the diameter of the thick rib portion 21 is set to be smaller than the circumference diameter of the fitting groove portion 37, for example. The liquid bag 2 is fitted into the fitting groove portion 37 in a state where the peripheral edge portion of the opening is pulled and the diameter is enlarged. The liquid bag 2 is set so that the cooling liquid (saline water / distilled water) is always circulated through the through hole (cooling liquid circulation passage portion) 35.

The fixing means 4 is composed of a pressing plate 41, a pressing ring body 42, and an elastic body (pusher pad) 43.

The pressing plate 41 has a hole 41c that fits into the cylindrical portion 34 of the tubular body 3 in the surface of a horizontal plate 41b that has a fitting flange portion 41a on the outer periphery, and fits into the cylindrical portion 3. is doing. The diameter of the flange portion 41a corresponds to the outer diameter of the disc portion 31 of the cylindrical main body 3 and is set to a fitting size. The pressing ring body 42 is a ring having an inner peripheral surface provided with a threaded portion 42a, and is screwed to the threaded portion 34a provided on the outer peripheral surface of the cylindrical portion 34. That is, the pressing ring body 42 is arranged above the pressing body 41 in a superimposed state. Further, a ring-shaped pusher pad (elastic body) 4 is provided between the lower surface of the pressing plate 41 and the contact surface between the disc portion 31 of the cylindrical main body 3.
3 is provided, and the pressing plate 41 is constantly attached to the pressing ring body 42.
I am pushing to the side.

FIG. 2 is a partially cutaway front view showing another embodiment of the electrode structure.

In this embodiment, the fixing means 4 is a cylindrical slider 44. That is, the tubular slider 44 is a tubular body having an inner diameter that fits on the outer surface of the tubular wall 39 of the tubular body 3, and slides on the tubular wall 39. Then, a plurality of ridges 45 are provided around the inner surface of the cylindrical slider 44 at regular intervals.
On the other hand, the cylindrical wall 39 is provided with a receiving side projection 39a corresponding to the projection 45. A sliding ring 44a is provided around the opening of the cylindrical slider 44. This ring is
It is made of a material with good slidability such as Teflon or nylon. As a result, the tubular slider 44 is attached to the tubular body 3.
Sliding ring 44a at the tip when fitting (sliding) deeply
Converts the rotational force of the slider 44 into a pressing force, and the fitting groove 38
The inner rib portion 21 is pressed and fixed. When the tubular slider 44 slides, the projection 45 is received by the receiving projection 3.
By overcoming 9a, the backward movement is prevented and the liquid storage bag 2 is held fixed.

In the electrode structure of the high-frequency thermotherapy device having such a configuration, the thick rib portion 21 of the liquid bag 2 is firmly fitted in the fitting groove portion 38 of the tubular body 3. In the normal state, the pressing plate 41 is pressed downward by the pressing ring body 42, and the fitting flange portion 41a of the pressing plate presses and fixes the rib portion 21 in the fitting groove portion 38 toward the bottom of the groove portion 38 by one layer. . Therefore, in the normal state, the rib portion 21 is covered with the tip of the fitting flange portion 41a, and the liquid storage bag 2 is completely fixed. Now, when exchanging the liquid storage bag 2, the pressing ring body 42 is rotationally operated to rotate upward with respect to the cylindrical portion 34 to be screwed. As a result, the pressing force on the pressing plate 41 is released, and the pressing plate (flange portion 41a) 41 is moved upward (by the pressing ring body 42) by the urging force of the pusher pad 43.
Side). Therefore, the rib portion 21 pressed and covered by the fitting flange portion 41a is exposed. Here, by taking out the rib portion 21 from the fitting groove portion 38, the replacement work of the liquid storage bag 2 can be easily executed.

(F) Effect of the Invention In this invention, as described above, the fitting groove for fitting and removing the rib of the liquid storage bag is provided in the tubular body, and the rib pressing fixing means movable with respect to the tubular body is provided. On the other hand, since the liquid storage bag is provided with a thick rib portion having a reduced diameter on the periphery of the opening, the rib portion of the liquid bag is fitted in the groove portion, and then the rib pressing fixing means is attached to the tubular body. By moving
The rib portion is pressed into contact with the groove portion, so that the liquid bag is firmly fixed.

Therefore, since the liquid bag is only fixed by the fixing means that is movable with respect to the tubular body, it is possible to replace the liquid bag with an extremely simple operation as compared with the conventional bolt fastening. It has the excellent effect of achieving the purpose.

[Brief description of drawings]

FIG. 1 is an enlarged view of an essential part of a partial cross-sectional view showing an electrode structure of an embodiment, FIG. 2 is a partially cutaway front view showing another embodiment of the electrode structure, and FIG. 3 is a high-frequency thermotherapy. FIG. 4 is a perspective view showing the device, and FIG. 4 is a front view showing a conventional electrode structure. 1: electrode, 2: liquid storage bag, 3: tubular body, 4: fixing means,

Claims (1)

[Scope of utility model registration request] 1. A tubular main body having a fitting groove portion provided in a proper position on an outer peripheral portion thereof, an electrode provided in the tubular main body, and a reduced-thickness rib having a reduced diameter to be fitted into and removed from the fitting groove portion of the tubular main body. A high-frequency thermotherapy device comprising: a liquid storage bag having a portion; and a fixing means that is provided corresponding to the tubular body and is movable with respect to the tubular body and that presses and fixes a rib portion that fits in the groove portion. Electrode structure.