Straight liver cancer portal vein cancer thrombus fetching tongs

Abstract

The invention relates to straight liver cancer portal vein cancer thrombus fetching tongs. The middle sections of two tong arms are connected through a rivet rotary shaft in a riveted mode, tong heads are arranged at the front ends of the tong arms, the tong heads and the tong arms are connected in a straight shape, the tong heads have front-flat rear-wide gradual flat arc concave surface structures, and the inner side walls of the tong heads are of wavy arc conical surface structures. When a cancer thrombus is clamped, the wavy arc conical surface structures of the inner side walls of the two tong heads are tightly engaged, when the two tong arms drive the two tong heads to be closed, the front-flat rear-wide gradual flat arc concave surface structures of the head ends of the two tong heads are folded, and a sealed thrombus fetching cavity is formed. According to the tong heads with open gradual flat arc concave surfaces, the portal vein cancer thrombus can be effectively clamped, the opening degree of the tong heads is maximized when the tong heads partially stretch into a blood vessel, the single clamping amount is large, when the tong heads are closed, conical surfaces of the side walls of the tong heads are tightly engaged, the cancer thrombus is not prone to disengagement after the tong heads are closed, no wound surface is contaminated, the radical treatment of the portal vein cancer thrombus embolectomy is guaranteed, operation is convenient, the surgical time is shortened, and efficiency is improved.

Description

technical field [0001] The invention relates to a clamp for taking out tumor thrombus or thrombus in portal vein in liver surgery, in particular, a clamp for removing tumor thrombus in portal vein in surgery for portal vein tumor thrombus of liver cancer. Background technique [0002] When the liver tumor develops to the middle and late stage, tumor emboli often invade the main blood vessels of the liver, such as the portal vein and hepatic vein. Whether the tumor emboli in the blood vessels can be removed will directly affect the patient's tumor recurrence and survival time. At present, there is no special thrombectomy forceps for vascular cancer thrombus clinically, and the thrombectomy instruments used are mostly replaced by existing instruments such as biliary tract lithotripsy forceps or tweezers. This type of forceps has many disadvantages in the operation process: the head of the forceps is mostly arc-shaped, and when it is inserted into the blood vessel to remove the...

AI Technical Summary

Problems solved by technology

This type of forceps has many disadvantages in the operation process: the head of the forceps is mostly arc-shaped, and when it is inserted into the blood vessel to remove the thrombus after opening, the opening size of the arc head is small, resulting in a tumor thrombus. The amount of grasping is small, and the tumor thrombus may be pushed into the blood vessel, making it difficult to remove the thrombus. Moreover, the texture of the portal vein tumor thrombus is relatively soft, and most of the tumor thrombi are more or less adhered to the wall of the portal vein (see figure 1 ), and there are even small blood vessels connected, so when removing the thrombus, only use forceps of different shapes that have been clinically used to hold the tumor thrombus. Too much clamping force will crush the tumor thrombus and cause tumor spread; The tumor thrombus cannot be effectively removed, and during the process of removing the tumor thrombus, due to a series of problems such as operating strength, the tumor thrombus may drip slightly, which can easily cause final tumor metastasis and affect the surgical effect

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