Disposable mucosal incision knife with injection needle and usage method

Abstract

Disposable mucosal incision knife with injection needle and using method, including mucosal incision knife assembly (1) and injection needle assembly (2), and mucosal incision knife assembly (1) and injection needle assembly (2) ) to form an integrated connection block (3). The mucosal incision knife assembly (1) includes an incision knife core rod, a thumb ring, a scale line, a sheath tube, a finger ring, a high-frequency current connector, a cutter steel pipe, a slide block, a connector fixing groove and an incision knife. The injection needle assembly (2) includes an injection needle core rod, a protective tube, a telescopic rod, a handle, an injection port, an injection needle and a marking line. The connection block (3) includes a fixed body, a connection body, a reserved port B and a reserved port A. The invention is easy to operate, easy to master, convenient for surgeons to use and control the length of the knife head and the needle head, improves the safety of using the device, and saves the time of operation and treatment.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a disposable mucosal incision knife with an injection needle and a usage method. Background technique [0002] Endoscopic-submucosal-dissection (ESD) is a new treatment method that has emerged in recent years. It refers to the endoscopic minimally invasive technique of submucosal dissection for lesions > 2cm by using various electric scalpels. Treatment of precancerous lesions such as giant polyps of the gastrointestinal tract, lateral developmental tumors, severe dysplasia and high-grade intraepithelial neoplasia, early cancer of the esophagus and gastrointestinal tract, and submucosal tumors of the esophagus and gastrointestinal tract. This technique enables en bloc resection of larger lesions and provides accurate pathological diagnostic staging. With the continuous development of endoscopic instruments, ESD has become the first choice for the treatment of early di...

AI Technical Summary

Problems solved by technology

[0009] Question 1: The mucosal incision knife and the injection needle commonly used in clinical practice are two independent devices, which are expensive and increase the cost of the hospital and the financial burden of the patient

[0010] Problem 2: The mucosal incision knife and the injection needle are two independent instruments, which are difficult for the operator to operate, and the resection depth of the mucosal incision knife is not easy to control

[0011] Question 3: Before removing the lesion, it is necessary to inject a water cushion into the lesion with an injection needle to elevate the lesion, and then use a mucosal incision knife to peel it off. Both the mucosal incision knife and the injection needle are two independent instruments, and the operator needs to replace them back and forth , which is tedious and time-consuming

[0012] Question 4: The device must be closed and recovered when it enters and exits the endoscopic cavity, but in reality, in the process of repeated replacement of the device, there are often cases of improper use of the device (forgetting to close and recover the knife head and injection needle into the protective sheath) phenomenon, resulting in damage to the precise and expensive endoscope, which cannot be used normally, increasing the failure rate and maintenance cost of the endoscope, and also increasing the treatment time and effect of the patient

[0013] Question 5: Although some mucosal incision knives currently on the market have injection functions, the head of the mucosal incision knife is the same as the needle of the injection needle, the injection wound is large, and it is equipped with an electric pump, which increases the cost, is expensive, and has a complicated structure , when the injection force is too large, the water volume is difficult to control, it is easy to inject too deep, and the injection fluid is wasted; the length of the knife head of the mucosal incision knife is too long and the length is not easy to control, which may easily cause the lesion to be peeled too deep, increasing the risk of bleeding and perforation

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