JPS6047859B2 - Intracavitary irradiation device for uterine cancer treatment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to an intracavitary irradiation device using a brachytherapy source (radioactive substance) for treating uterine body pressure.

(B) Conventional technology and problems Radiation therapy for uterine body pressure includes local irradiation with brachytherapy sources such as 1 radium and cobalt, 2 telecobalt,
Methods include external irradiation using a linac, etc., or a combination of these.

Conventionally, as this type of apparatus, for example, the triangular container method (Dietel) shown in FIG. 1 and the packet method (Dietel) shown in FIG.
ietel) etc.

This method is used when the uterus has a tumor that is not very large, and can provide a dose distribution that covers the entire area. However, since a small number of radium tubes (capsules) 2 are arranged in a dispersed manner, if the tumor is thick in the anteroposterior direction, this will not be sufficient. In order to avoid such drawbacks, the backing method (Heyman) shown in Figure 3 is used.
, there is a cobalt piece method (Becker) shown in Figure 4 (Obstetrics and Gynecology M00KN0.2.1978, P215
~222). However, this method has the disadvantage of being disadvantageous in terms of radiation exposure protection, since the radiation source must be handled for a certain amount of time during operation. In short, in the conventional method, since one capsule 2 is used, it is difficult to spread the dose evenly over the entire inner wall surface of the uterine cavity, making it difficult to enhance the therapeutic effect. 2. During the manufacturing process, the capsules 2 are connected one by one, which is time consuming and inefficient, and when the capsules 2 are inserted into the uterine cavity 1 one by one, it takes time.

Therefore, there is a considerable risk of radiation exposure for those handling it. Furthermore, since uterine body pressure is common in nulliparous women and elderly people, it is surprisingly difficult to dilate the cervical canal prior to inserting the radiation source.
If it cannot be expanded all at once, it must be expanded over time using a laminaria or the like. Therefore, much time was required for treatment. The 3-packing method and the like have various problems such as the need to install the Taejo's canal in the cervical canal 4 to facilitate removal, making removal work difficult, and are therefore not suitable.

I/→ Purpose of the Invention The present invention eliminates such inconveniences, and its purpose is to easily distribute the dose to the entire inner wall of the uterine cavity to enhance the therapeutic effect, and to remove the radiation source with a simple operation. The aim is to reduce the risk of radiation exposure for the operator by inserting it into the uterine cavity, to shorten the treatment time, and to simplify the removal of the radiation source after treatment.

(d) Structure of the Invention The structure of the present invention includes a flexible hollow vibrator having a bent end portion filled with a radiation source, and a flexible hollow vibrator that is once stored and inserted into the uterine cavity. It is composed of an insertion tube that serves as a guide tube, and an insertion rod that is inserted into the insertion tube for inserting the hollow vibrator into the uterine cavity.

(e) Examples of the invention Typical embodiments will be described below with reference to the drawings.

FIG. 5 shows a flexible hollow vibrator 10 used in the device of the present invention, for example, a vibrator made of polyethylene, ethylene vinyl acetate, or the like is formed into a spiral shape with its tip shaped like a mosquito coil by any means such as heat treatment. A bent portion A is provided at the tip.

The size of the tip bent portion A consisting of the spiral 11 is preferably such that it occupies the entire area inside the uterine cavity. The hollow vibrator 10 is not limited to the mosquito coil-shaped spiral 11 shown in FIG. 5, as long as the bent portion A occupies the entire uterine cavity. , triangular spiral 12 (Figure 6), flower pattern fold 13 (Figures 7 to 11)
), serpentine shape 14 (FIG. 12), etc.

These tip bent portions A of the hollow vibrator 10 are filled with a radiation source (radioactive substance). The radiation source 15 contains radium, cobalt, cold 198, etc., for example, with a length of 2
．． 45, formed to a diameter of 0.825, or a granular material, for example, as shown in Fig. 13, the load 16 provided at the rear end
It is inserted from the side and filled into the hollow vibe 10. The filling amount is the amount necessary for radiation therapy and is determined by the doctor each time, but the dose may be adjusted by inserting an empty ball (not a radiation source) 23 in between, as shown in Figure 21. can.
The insertion tube 17 is provided with a flange 18 as shown in FIG.
It is made of a tube made of a hard material that conforms to the curvature of the tube.

A hollow vibrator 10 whose tube 17 is filled with a radiation source 15
is inserted while stretching it. The insertion tube 17 can be inserted into the cervical canal and uterine cavity with the hollow vibrator 10 once stored. The flange 18 combined with the insertion tube 17 serves as an index necessary for fitting the hollow vibrator 10 at an appropriate position according to the size of the uterus when inserting it into the uterine cavity. Insertion rod 19
A handle 20 is provided at the lower part, and is used when pushing the hollow vibrator 10 inserted into the insertion tube 17 into the uterine cavity 1.

This insertion rod 19 is inserted into the insertion tube 17 as shown in FIG. The intracavitary irradiation device for treating uterine body cancer configured as described above is operated as follows.

For example, when using the hollow vibrator 10 in FIG.
As shown in the figure, after attaching the spherical stopper 21 to the tip 1'' of the spiral 12 of the hollow vibe 10, the load 16 is attached to the rear end 102 of the hollow vibe 10, and while the hollow vibe 10 is being extended, for example, a length of 2. 45? , the required amount of radiation sources 15 having a diameter of 0.825 are filled.

After that, attach the stopper 22 to the rear end 1' of the hollow vibrator 10, and insert it into the insertion tube 17 from the rear end 1' while extending the hollow pipe 10 as shown in Figure 16, and insert it as shown in Figure 17. It is stored in the cylinder 17. In this way, insert tube 1
A spherical stopper 21 is positioned at the tip 17'' of the hollow vibrator 10 so that the insertion tube 17 can be easily inserted into the uterus (FIG. 17). Next, as shown in FIG. 18, insert the insertion tube 17 into the uterus from the tip 17'',
With the flange 18 located at the entrance 5 of the cervical canal 4,
As shown in FIG. 19, the insertion rod 19 is pushed into the insertion tube 17, and the hollow vibe 10 inside the insertion tube 17 is pushed out into the uterine cavity 1.

At this time, since the insertion tube 17 serves as a guide tube, the hollow vibrator 10 can be easily inserted into the uterine cavity 1. Note that the hollow vibrator 10 can be inserted into the uterine cavity 1 by pushing the insertion rod 19 or by inserting the tip 17 of the insertion tube 17 close to the uterine fundus so that the tip bent part A of the hollow vibe 10 is inserted into the uterine fundus. Alternatively, the insertion tube 17 may be pulled while the insertion rod 19 is fixed in contact with the insertion tube 17. As a result, the hollow vibrator 10 is restored to its original shape by the restoring force as shown in FIG. 20, and the volute 12 comes to occupy almost the entire area inside the uterine cavity 1. Then, the insertion tube 17 is pulled out and the loading operation is completed. (f) Effects of the invention As mentioned above, the bent tip of the hollow vibrator filled with the radiation source pushed out from the insertion tube returns to its original shape due to the restoring force and occupies almost the entire area inside the uterine cavity, so that it is not irradiated. The radiation dose can be distributed throughout the uterine cavity wall, further enhancing the therapeutic effect.

In addition, since the hollow vibrator filled with the radiation source is pushed into the uterine cavity using the insertion tube as a guide, the radiation source can be inserted with a simple operation and can be prepared in a short time using a laminar. Complete. Therefore, the risk of radiation exposure to the operator can be reduced, and the time required for treatment can be shortened. In addition, the radiation source can be removed after treatment by simply grasping and pulling the rear end of the hollow vibrator protruding from the external cervical os, which is extremely simple, and the present invention has great effects.

[Brief explanation of the drawing]

Figures 1 to 4 are cross-sectional views showing the conventional method, and Figures 5 to 1.
Fig. 2 is a plan view of the hollow vibrator used in the present invention, Fig. 13 is a side view showing the state in which the hollow vibrator is filled with a radiation source, and Fig. 14 is a plan view of the hollow vibrator used in the present invention.
The figure is a perspective view of the insertion tube used in the present invention, FIG. 15 is a perspective view of the insertion rod used in the present invention, FIG. 16 is a side view showing the state in which the hollow vibrator is inserted into the insertion tube, and FIG. 17 is the insertion tube. FIG. 18 is a sectional view showing the insertion tube inserted into the uterus; FIG. 19 is a sectional view showing the hollow vibe being pushed into the uterine cavity;
Figure 0 is a cross-sectional view showing a state in which a hollow vibrator is loaded into the uterine cavity, and Figure 21 is a cross-sectional view showing a state in which a blank vibrator is inserted to adjust the dose.1.・Uterine cavity, 2... Radium tube (capsule), 3... String, 4... Cervical canal, 5... External cervical os, 10 ...Hollow vibe, 11 ... Vortex, 12 ... Vortex, 13
...Bend, 14...Meandering shape, 15...
・Radiation source, 16... Load, 17... Insertion tube, 18... Flange, 19... Insertion rod, 20... Handle , 21, 22...
Plug, 23...Empty ball, A...Tip bent part.

Claims (1)

[Claims] 1. A flexible hollow pipe having a bent end portion filled with a radiation source, an insertion tube that temporarily houses the hollow pipe and serves as a guide tube when inserted into the uterine cavity, and the hollow pipe. 1. An intracavitary irradiation device for treating uterine body cancer, comprising an insertion rod inserted into the insertion tube for inserting the uterine cancer into the uterine cavity.