JPH0613758Y2 - Bolus for hyperthermia - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a bolus used for hyperthermia (thermotherapy), and particularly to a bolus suitable for an electromagnetic wave irradiation heating system.

[Prior art]

Hyperthermia, which is an electromagnetic wave irradiation and heating system, is a therapy for treating cancers and tumors by irradiating electromagnetic waves from outside the body to heat the inside of the body.

As shown in FIG. 3, this kind of device is equipped with an applicator (electromagnetic wave radiator) (1) and this applicator (1), and a bolus (2) inserted between the applicator (1) and the living body. It consists of and.

The bolus (2) cools the surface of the living body while performing impedance matching between the living body and the applicator.
The bag is filled with water or saline.

[Problems to be solved by the invention]

Since the bolus needs to be in close contact with the living body, the bag is made of a soft material such as vinyl or silicone rubber.

When the applicator (1) is positioned above the living body for treatment as shown in Fig. 3, no trouble will occur, but as shown in Fig. 4, the applicator (1) is placed on the side of the living body. If you do, the bolus (2) will hang down with the weight of the water in it,
The degree of adhesion with the living body surface deteriorates.

As a result, efficient heating cannot be performed, and it causes hot spots.

The applicator (1) may be pressed against the living body with a strong pressure in order to improve the adhesion, but in this case, the patient is distressed.

In view of the above, the present invention has an object to provide a bolus for hyperthermia in which the shape of the bolus does not change regardless of the orientation of the applicator such as to the side of the living body and has good adhesion to the living body.

[Means for solving problems]

This invention is a bolus for hyperthermia in which a matching liquid and a cooling liquid are contained in a bag body and adhered to the surface of a living body. A porous elastic body is contained in the bag body, and the porous elastic body and the bag body are brought into contact It is characterized in that the parts are joined at a plurality of points.

[Action]

 The operation of the present invention will be described with reference to FIG.

(1) is an applicator, (2) is a bag attached to the applicator (1), (3) is a porous elastic body contained with the liquid in the bag (2), and is attached to the bag (2). It is joined at multiple points.

Bag the applicator (1) sideways as shown (2)
Due to the gravity acting on the liquid inside, the bag body (2) tries to hang downward. Since the porous elastic body (3) is joined to the bag body (2) at multiple points, the tension acting on the bag body against gravity and the repulsive force of the porous elastic body cancel each other and the shape of the bag body (2) collapses. There is no.

As a result, the bolus can be brought into close contact with the living body at any position of the living body.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view showing the structure of an applicator-integrated bolus, where (1) is an applicator and (2) is a bolus bag.

Applicator (1) is a box with a flange (11) at the opening
(12), the electrode (13) disposed inside, and this electrode (1
3) and a power feeding section (15) for applying a high frequency voltage.

(16) is a resin plate that closes the opening of the box (12), and a non-conductive and hard sponge or other porous elastic body (3) is attached to the resin plate.
Is installed.

The porous elastic body (3) is covered with a sheet of elastic and flexible silicon rubber or the like that constitutes the bag body, and the peripheral edge of the sheet is pressed by the holding ring (17) to form a flange together with the resin plate (16).
It is concluded in (11).

The porous elastic body (3) is preferably housed in the bag body (2) in a compressed state, and the contact portion with the bag body (2) is joined to the bag body (2) at multiple points. There is. (18) indicates a junction. The bag (2) is filled with non-ionized water or degassed water.

Since the energy transfer efficiency decreases when air is present in the porous elastic body (3), the porous elastic body (3) is a substance having a three-dimensional skeleton structure in which the membranous substance is completely removed. , For example, "Everlight Scott" manufactured by Bridgestone Corporation is suitable.

According to the bolus configured as described above, the tension acting on the bag body and the repulsive force (elasticity) of the porous elastic body cancel the gravity acting on the bag body (2) even if the applicator is turned sideways, as described in the action. 、 Because the shape of the bolus is not broken,
The porous elastic body can be easily deformed by applying pressure, and the bolus can be adhered to the surface of the living body.

Although the bolus is attached to the applicator in the embodiment, it may be separated from the applicator.

However, if it is integrated with the applicator as in the embodiment,
Since the bolus holding mechanism is unnecessary, the structure is simple and it is advantageous in handling.

〔effect〕

If the bolus for hyperthermia of the present invention is used, the bolus can be kept in close contact with the surface of the living body at any angle of the applicator.

[Brief description of drawings]

FIG. 1 is a sectional view showing the structure of an embodiment of the present invention, FIG. 2 is a diagram for explaining the operation, FIG. 3 is a view showing the structure of a conventional bolus, and FIG. 4 is a problem of the conventional bolus. FIG. 1: Applicator (11 ...... flange, 12 ... box, 13 ...
… Electrode, 15 …… Feed part, 16 …… Resin plate) 2: Bag body, 3: Porous elastic body 17: Holding ring, 18: Joining point

Claims (1)

[Scope of utility model registration request] 1. In a hyperthermia bolus for accommodating a matching and cooling liquid in a bag body and closely contacting the surface of a living body, a porous elastic body is housed in the bag body, and the porous elastic body and the bag body are combined with each other. A bolus for hyperthermia, characterized in that the contact parts of are joined at multiple points.