Bent thrombus extraction forceps for liver cancer portal vein tumor thrombus

Abstract

The invention relates to a pair of bent thrombus extraction forceps for a liver cancer portal vein tumor thrombus. Through a rivet rotating shaft, middle sections of two forceps arms are riveted with each other; forceps heads are arranged at the front ends of the forceps arms; handles are arranged at the back ends of the forceps arms; angles between the forceps heads and the forceps arms are 150 degrees; the forceps heads are provided with gradually changed flat arc hollow concave structures which protrude outwards; when the forceps heads are closed, the gradually changed flat arc hollow concave structures, which are flat at the front parts and wide at the back part, of the two forceps heads are buckled with each other to form a sealed thrombus extraction chamber; the internal side walls of the forceps heads are of wavy arc cone structures; and during extracting tumor thrombus, the wavy arc cone structures on the internal side walls of the two forceps heads are closely engaged with each other and closely embedded with each other to clamp tumor thrombus tissues. According to the invention, the portal vein tumor thrombus can be effectively extracted by using open forceps heads with gradually changed flat arc hollow concave planes and the forceps heads are opened in a maximized way when the forceps head parts extend into blood vessels, so that the single extraction amount is large. The forceps head walls are closely engaged with each other after the forceps heads are closed; therefore, the tumor thrombus is not prone to fall off, wound surfaces cannot be polluted and the received radical performance of the portal vein tumor thrombus embolectomy is guaranteed. The pair of bent thrombus extraction forceps for the liver cancer portal vein tumor thrombus, provided by the invention, has the advantages that the convenience in operation is realized, the operation time is shortened and the 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 to a clamp for removing thrombus in portal vein branch vessel tumor thrombus in portal vein tumor thrombus surgery for 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 bloo...

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 at the same time, it may push the tumor thrombus to the inside of the blood vessel, making it difficult to remove the thrombus

Moreover, the texture of portal vein tumor thrombi 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 operation strength, the tumor thrombus may drip slightly, which can easily cause secondary infection and affect the surgical effect

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