JPH0584255A - Microwave operating device - Google Patents

Abstract

PURPOSE:To provide the microwave operating device which simultaneously and effectively executes the incision, disconnection, excision, etc., and blood stopping and clotting of the vital tissue, is easy to use and can execute adhesiotomy as well. CONSTITUTION:An operating blade 1 for the incision, disconnection, excision, etc., of the vital tissue constituting a central electrode for microwave irradiation is connected to an internal conductor 2 for microwave transmission. The operating blade 1 is coated with an insulator 3 exclusive of the front end of the operating blade 1. A convergent cylindrical outside electrode 7 is provided on the outer side of the insulator 3 and the outside electrode 7 is connected to an external conductor 5 for microwave transmission.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave surgical instrument for performing incision, dissection, excision, etc. of living tissue by microwaves.

[0002]

2. Description of the Related Art In a conventional microwave surgical instrument, a central electrode for microwave irradiation is a monopolar type electrode having a needle shape, a ball shape or the like, and the electrode is pierced or pressure-contacted with a diseased tissue of a living body. A microwave is generated between the electrode and the outer conductor located at the base of the electrode, and the hemostasis and coagulation of the microwave are performed very effectively by the dielectric heat of the microwave. Particularly, a tumor of a parenchymal organ or an ulcer accompanied by jet bleeding Has achieved great results in surgical treatment.

However, in the case of this needle-shaped or ball-shaped electrode, it is not possible to cut the tissue while bleeding the tissue when the tissue is cut, cut or cut. Therefore, Japanese Examined Japanese Patent Publication 63-610
21 (A61B 17/36) has invented the microwave surgical instrument to enable incision and hemostasis at the same time.

On the other hand, in the recent new gastrointestinal surgery, a laparoscopic non-laparoscopic surgery method is performed for surgery on liver, gall, spleen and other parenchymal organs without laparotomy.

[0005] For example, in surgery for removing gallstones, a hole having a diameter of 5 to 10 mm is punched from outside the body to a plurality of places (generally four places) around the navel without opening the abdomen, and the abdominal cavity is previously made with harmless gas. A trocar (mantle tube) for operating the electrodes of the microwave scalpel, laser scalpel, electric scalpel, etc. inside the inflated hole, the light guide and the CCD containing the CCD in the hole of the navel, and the appropriate holes around it. A trocar for inserting one of the forceps operated by the surgical attendant into the abdominal cavity is inserted into the other two appropriate holes from outside the body.

[0006] Then, the operator and the caregiver dissect the gall bladder while observing the inside of the abdominal cavity on the television monitor, and remove the gallstone outside the body. Then, it takes about one month or more for laparotomy to rehabilitate due to the recovery of the patient, and the surgical scar remains about 10 cm, but with this non-laparotomy, rehabilitation is only 4,5 days, There are only a few surgical scars with a diameter of only a few millimeters.

[0007]

In the case of the conventional microwave surgical instrument described in the above publication, there is a problem that the hemostatic effect is not sufficient, the electrode itself is difficult to use due to its structure, and it is not practically used clinically. . Further, in the conventional non-laparotomy surgery method, if adhesion is present in the affected tissue, the adhesion cannot be removed by the operation using a laser scalpel or an electric scalpel, and it is difficult to carry out the procedure. However, there is a problem that we have to resort to open surgery.

In consideration of the above points, the present invention can effectively perform incision, incision, excision and the like of tissue and hemostasis and coagulation at the same time, and it is easy to use, and adhesion detachment is smooth. An object is to provide a microwave surgical instrument that can be performed.

[0009]

In order to solve the above-mentioned problems, the microwave surgical instrument of the present invention is provided with an incision, an incision, and an incision of a biological tissue forming a microwave irradiation center electrode on an internal conductor for microwave transmission. Connect the surgical blade for excision, etc., cover the surgical blade with the insulator leaving the tip of the surgical blade, provide a tapered cylindrical outer electrode on the outside of the insulator, and use the outer electrode as an outer conductor for microwave transmission. It is connected.

[0010]

In the microwave surgical instrument of the present invention configured as described above, the surgical blade is connected to the microwave transmission inner conductor, and the surgical blade is covered with an insulator while leaving the distal end of the surgical blade. Since a tapered cylindrical outer electrode connected to the outer conductor for microwave transmission is provided on the outside of the body, a surgical blade cuts and cuts tissue. When excision is performed, dielectric heat is generated in the tissue due to the strong electric field of microwaves, resulting in incision, dissection,
Hemostasis and coagulation are simultaneously performed on the local tissue where the excision or the like has been performed, and the surgery is performed very safely and surely and smoothly.

[0011]

EXAMPLES Examples will be described with reference to the drawings. First, FIGS. 1 to 4 showing one embodiment will be described. Reference numeral 1 denotes a blade, a razor blade-shaped surgical blade, which is connected to the microwave transmission inner conductor 2 and constitutes a microwave irradiation central electrode, which is used for incision, dissection, excision, etc. of living tissue. Reference numeral 3 is an insulator that insulates microwaves. The insulator 3 covers the surgical blade 1 by leaving the tip portion of the surgical blade 1, that is, the cutting edge as much as necessary, and is composed of a flat, tough Teflon or the like.

Reference numeral 4 is an insulator covering the inner conductor 2, 5 is an outer conductor for microwave transmission provided on the outer periphery of the insulator 4,
Reference numeral 6 denotes a locking projection provided at two locations on the outer periphery of the outer conductor 5,
Reference numeral 7 denotes a tapered cylindrical external electrode, the flat end portion of which is located near the end portion of the insulator 3 of the surgical blade 1, and the base portion of which is connected to the outer conductor 5 to form a connector 8.

Reference numeral 9 is a grip, and 10 is a coaxial cable penetrating the grip 9. When the connector 8 is detachably connected to the tip of the grip 9, the inner conductor 2 and the outer conductor 5 are connected to the coaxial cable 10. It Reference numeral 11 is a switch.

When the tissue is incised, cut and excised with the surgical blade 1 while supplying microwaves to the surgical blade 1 and the external electrode 7, dielectric heat is generated in the tissue by the strong electric field 12 of the microwave. However, hemostasis and coagulation are simultaneously performed on the local tissue where the incision, dissection, and resection are performed.

Next, FIGS. 5 and 6 showing another embodiment will be described. Hereinafter, the same reference numerals as those in FIGS. 1 to 4 denote the same or corresponding parts. This has a surgical blade 1 and an inner conductor 2 covered with an insulator 3, an outer electrode 7 provided on the outer periphery thereof, and a connector 8 at the base, and has a total length of 3 to 3
It is preferable that the thickness is 0 cm and the thickness is 10 mm or less. In the case of laparoscopic surgery, the total length is 20 to 30 cm, and in the case of open surgery, the total length is 3 to 10 cm. Next, FIG. 7 is an illustrative view of the surgical blade 1, where A is a protruding type, B is a sickle type, and C is a push-cut type.

[0016]

Since the present invention is configured as described above, it has the following effects. The surgical blade 1 is connected to the internal conductor 2 for microwave transmission, and the surgical blade 1 is covered with the insulator 3 except for the tip of the surgical blade 1.
Since the tapered cylindrical outer electrode 7 connected to the microwave transmission outer conductor 5 is provided on the outside of the body, when the surgical blade 1 cuts, cuts, or cuts tissue, the microwave power is increased. Dielectric heat is generated in the tissue due to the electric field, and it is possible to stop bleeding, coagulate, and coagulate the local tissue that has undergone incision, dissection, excision, etc. at the same time, and it is possible to perform surgery very safely and surely, and adhesion detachment Surgery can be performed.

[Brief description of drawings]

FIG. 1 is a cut front view of an embodiment of a microwave surgical instrument of the present invention.

2 is a cutaway plan view of FIG. 1. FIG.

FIG. 3 is a plan view of FIG.

FIG. 4 is a front view in which a grip is attached to FIG.

FIG. 5 is a cut front view of another embodiment.

FIG. 6 is a perspective view of FIG.

7A, 7B and 7C are front views of modified examples of the surgical blade of FIG.

[Explanation of symbols]

 1 surgical blade 2 inner conductor 3 insulator 5 outer conductor 7 outer electrode

[Procedure amendment]

[Submission date] June 24, 1991

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction content]

[Figure 7]

Claims (1)

[Claims] 1. An internal conductor for microwave transmission is connected to a surgical blade for cutting, separating, excision, etc. of a biological tissue constituting a central electrode for microwave irradiation, and an insulator is used to leave the distal end of the surgical blade. A microwave surgical instrument which covers the surgical blade, provides a tapered cylindrical external electrode on the outside of the insulator, and connects the external electrode to an external conductor for microwave transmission.