Porta hepatis blood flow blocking device used in liver operation

Abstract

The invention provides a porta hepatis blood flow blocking device used in liver operation. The porta hepatis blood blocking device comprises a catheter, a storage tube, a positioning head and an installation tube, the catheter is connected with the storage tube, the tail end of the catheter is closed, the installation tube is located in the catheter and the storage tube, the tail end of the installation tube is installed at the closed tail end of the catheter in a penetrating mode, the head end of the installation tube extends out of the storage pipe and is provided with the positioning head, and a blocking part which can be stored in a sliding manner is mounted on the installation tube between the storage tube and the positioning head. According to the invention, the expanding and folding states of a blocking disc can be quickly adjusted, the control time is shortened, medical personnel can accurately master the entering condition of the blocking device and accurately master, position and determine the insertion position of the blocking device, the working efficiency is improved, the ischemia reperfusion injury of the lesion liver can be reduced to the maximum extent, and the liver function is retained; and the probability of portal vein metastasis is reduced, and the survival rate of the patient in the perioperative period after operation is improved.

Description

technical field [0001] The invention relates to the technical field of medical appliances, in particular to a hepatic portal blood flow blocking device used in liver surgery. Background technique [0002] In the prior art, blood flow occlusion is required during liver surgery. Ultrasound-guided transhepatic portal vein occlusion at the present stage is to insert a balloon catheter under the guidance of intraoperative ultrasound to resect the hepatic portal vein branch, and fill the balloon to block the blood flow. At the same time, dye can be injected, and the liver parenchyma will be stained as a sign of liver separation, so as to perform precise resection. It can minimize the ischemia-reperfusion injury of the diseased liver, preserve liver function, and reduce the chance of portal vein metastasis. However, this technology requires corresponding ultrasound technology and puncture technology, which limits its clinical application. [0003] For example, the authorized ann...

AI Technical Summary

Problems solved by technology

But it still has the following disadvantages: because the blocking capsule uses shape memory alloy to control the expansion and contraction, the expansion and contraction is based on the temperature change in the body, and the temperature rise and fall is a gradual change process. Afterwards, the injection of low-temperature chemotherapy marked liquid is used to shrink the blocking sac due to cold, and the liver is an important organ. The chemotherapy liquid cannot be injected in large quantities. The temperature of the cooling liquid will affect the contraction of the shape memory alloy, so the blocking sac cannot be adjusted for rapid expansion and contraction. , relying on changes in body temperature to control the expansion and contraction time of the shape memory alloy needs to be improved, and the positioning of the positioning head cannot be quickly judged to determine the insertion position of the blocking device

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