JP2000014678A - Mucosa dissection forceps used in digestive tract endoscope treatment and its use - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform dissection for the peripheral mucosa of a mucosa to be resected more safely and surely as compared with the operation using a needle knife, and easily and collectively resect a mucosal tumor of above a designated size difficult to be resected by the conventional operation by clamping the mucosa and then performing dissection with high-frequency current. SOLUTION: A liquid such as physiological saline or the like is first injected in the mucosa lower layer of mucosa to be dissected by a local injection needle to raise up the mucosa. The raised mucosa to be dissected is clamped by a mucossa dissection forceps. After it is enough confirmed that the region to be dissected is well clamped and a muscular tunics is not clamped, and further the safety is confirmed, a high-frequency current is let flow to dissect the mucosa while the forceps is pulled. By repeating the operation, a resection line is extended to complete the predetermined mucosa dissection. Thus, the forceps can be used in treating and inspecting a mucosal lesion of an esophagus, stomach or large intestine and used for mucosal dissection as assistance for the endoscopic mucosal resection.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gastrointestinal endoscopic procedure as a medical technique, and is a completely new method for incising a mucous membrane.

[0002]

2. Description of the Related Art As a conventional endoscopic mucosal incision technique, there is an incision method using a needle knife in addition to an incision of the duodenal papilla using a papillotome knife.

[0003]

The papirotomy knife can only be used for special purposes such as duodenal papilla incision and is not suitable for general mucosal incision. In addition, in the incision of the mucous membrane with the needle knife, holding of the tip of the needle knife is unstable, and it is difficult to adjust the depth and direction of the incision. For this reason, there is a problem that a proper incision requires a technique, and if it is cut too deeply, there is a risk of bleeding or perforation.

[0004]

In order to solve the above-mentioned problems, in the present invention, a mucous membrane to be incised is first sandwiched between forceps, and after confirming that the incised portion is appropriate, a high-frequency current is applied to the mucosa to perform the incision. I am trying to do it. By adopting such a method, the incision position and depth can be appropriately determined, and if the entrapment is performed at an inappropriate position, the incision can be performed again before the high-frequency current flows, and Incision can be prevented beforehand. This method enables more reliable and safe mucosal incision.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a liquid such as saline is injected into a submucosa layer immediately below a mucosa to be incised by using a local injection needle so that the mucous membrane is raised. The raised mucous membrane to be dissected is sandwiched by the forceps for mucosal dissection according to claim 1. Make sure that the part to be incised is properly sandwiched and that the muscle layer is not sandwiched, and after confirming safety, apply high-frequency current and incise the mucous membrane while pulling the forceps. By repeating the above operation, the incision line is extended, and the mucosal incision is completed as scheduled.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention can be used for mucosal incision and the like for assisting endoscopic mucosal resection, which is performed for treatment or examination of mucosal lesions of the digestive tract such as esophagus, stomach, and large intestine.

[0007]

According to the present invention, the incision of the mucous membrane around the mucosa to be resected can be performed more safely and more reliably than with the use of a needle knife. It is possible to safely perform the above-described simultaneous resection of mucosal tumors.

[Brief description of the drawings]

FIG. 1 is an overall view of a forceps for mucosal incision. The outer surfaces of the insertion section and the operation section are electrically insulated.

FIG. 2 is an enlarged view of a distal end portion of a forceps for mucosal incision. The outer surface of the hatched portion is electrically insulated.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mucosa incision forceps operation part 2 Mucosa incision forceps insertion part 3 Mucosa incision forceps tip part 4 High frequency connection plug 5 Intramucosal penetration and incision part (exposed metal surface) 6 Mucosa incision forceps tip part outer surface insulating part

Claims (3)

[Claims] A forceps for incising a mucous membrane with a high-frequency current after sandwiching the mucous membrane. 2. A method for localizing the action of a high-frequency current by leaving only a part of a treatment tool and insulating the other part. 3. A mucosal incision as a gastrointestinal endoscopic procedure performed using claim 1.