JPH0119934Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a microwave surgical instrument that uses microwaves to coagulate living tissue and stop bleeding, and its purpose is to perform surgical treatments such as coagulation and hemostasis of diseased tissues deep within living tissues. .

Conventionally, when treating diseased tissue deep within a living body, a method has been adopted in which the patient undergoes a deep laparotomy, but in this case, opening the living body's abdomen carries many risks such as bleeding, and the surgery is large-scale. Moreover, it is accompanied by the inconvenience of prolonging the recovery period after surgery.

In addition, there is a method of using biopsy forceps or the like to perform treatment without opening the abdomen. That is, biopsy forceps or the like are inserted deep into the body from outside the body through a biopsy puncture tube, and surgical treatment is performed under laparoscopy or ultrasonic examination. However, in this case, although a prescribed treatment can be performed without abdominal surgery, it is extremely difficult to stop the bleeding at the puncture hole using biopsy forceps or the like.

This invention was made with the above-mentioned points in mind, and includes a tubular ground electrode that is inserted into living tissue, and a tube-shaped ground electrode that is provided at the core of the ground electrode and has a tip that is led out from the tip of the ground electrode. a tubular insulator;
Microwave surgery comprising a rod-shaped central electrode provided in the core of the insulator, a microwave irradiation part at the tip, and a rod-shaped center electrode led out from the tip of the insulator and inserted into the living tissue together with the tip of the insulator. It provides equipment.

Therefore, according to the microwave surgical instrument of this invention, a spindle-shaped microwave electric field can be formed between the microwave irradiation part at the tip of the center electrode and the tip of the ground electrode, so that laparoscopy can be performed. Under examination and ultrasonic examination, an insulator and a center electrode are inserted from outside the body, along with a ground electrode, deep into living tissue and irradiated with microwaves. Necessary surgical treatments such as hemostasis can be performed, and surgical treatments such as coagulation of the puncture hole with biopsy forceps and hemostasis can also be performed easily.This device is a microwave surgery suitable for percutaneous treatment deep inside the body. It provides equipment.

Next, this invention will be explained in detail with reference to drawings showing embodiments thereof.

First, FIGS. 1 to 3 showing one embodiment will be explained.

In these drawings, 1 is a flexible coaxial cable connected to a microwave oscillator (not shown);
2 is a surgical handpiece provided at the tip of the coaxial cable 1; 3 is a long and thin percutaneous surgical electrode for deep inside the body that is supported by the handpiece 2 and penetrates the skin from outside the body and is inserted deep into the living tissue; 4 is a tubular ground electrode that serves as an external conductor of the surgical electrode 3; 5 is a tubular microwave insulator that is provided in the core of the ground electrode 4 and whose tip is led out from the tip of the ground electrode 4; 6 is an insulator 5; The microwave irradiation part 6a at the tip provided in the core is a rod-shaped center electrode led out from the tip of the insulator 5, and a sharp conical point 6b is formed at the tip of the microwave irradiation part 6a. has been done.

Note that tapered parts 4a and 5a are formed at the distal ends of the ground electrode 4 and the insulator 5 to facilitate insertion of the surgical electrode 3 into living tissue, and the center electrode 6 and the ground It is insulated from the electrode 4 by an insulator 5 and connected to the coaxial cable 1 inside the handpiece 2, and is irradiated with 2450 MHz microwaves from the microwave irradiation part 6a of the center electrode 6.

Then, under ultrasonic examination, as shown in FIG.
When inserted into the deep diseased tissue and irradiated with microwaves, an insulator 5 is formed between the microwave irradiation part 6a and the tip of the ground electrode 4, as shown by the broken line in the figure.
The microwave irradiation part 6a is centered around the tapered part 5a of
A spindle-shaped microwave electric field is formed in a region approximately twice the length of , with the tapered portion 5a having the maximum diameter and gradually weakening at both ends. Therefore, due to the dielectric heat generated in the biological tissue 7 by the microwave electric field, the deep diseased tissue stops bleeding, coagulates, and becomes necrotic.
Predetermined surgical treatment is performed.

Therefore, according to the embodiment, the surgical electrode 3
It is possible to coagulate and stop bleeding of diseased tissue deep within the body by directly puncturing the living tissue from outside the body, and it is possible to perform the necessary surgical treatment such as coagulation and hemostasis without opening the abdomen of the diseased tissue. It is something that

Next, FIG. 4 showing another embodiment will be explained.

In the figure, the difference from the above is that the center electrode 6
The point is that a rounded curved surface 6c for insertion into a living body is formed at the tip of the microwave irradiation part 6a.

Therefore, under ultrasound examination, the tube is inserted deep into the body from the skin surface using a laparoscopic cannula.
It enables localized microwave surgery on the affected area, and is also suitable for hemostasis and coagulation of puncture holes made with biopsy forceps inserted from outside the body.

[Brief explanation of the drawing]

The drawings show an embodiment of the microwave surgical instrument of this invention, and Fig. 1 to Fig. 3 show one embodiment, Fig. 1 is a front view, Fig. 2 is a partially cutaway front view of the main part,
FIG. 3 is a cutaway front view during surgical treatment, and FIG. 4 is a partially cutaway front view of main parts of another embodiment. 4... Ground electrode, 5... Insulator, 6... Center electrode, 6a... Microwave irradiation section, 7... Living tissue.

Claims (1)

[Scope of utility model registration request] a tubular ground electrode to be inserted into living tissue; a tubular insulator provided in the core of the ground electrode and with a distal end extending from the distal end of the ground electrode; and a distal end provided in the core of the insulator. A microwave surgical instrument comprising: a rod-shaped center electrode that is led out from the tip of the insulator and inserted into living tissue together with the tip of the insulator.