A hepatic portal blood flow blocking device

Abstract

The invention discloses a hepatic portal blood flow blocking device, which relates to the field of clinical medicine, and comprises a catheter, a blocking bag and a positioning head. The base end of the catheter is provided with a protective plug to prevent external impurities from entering the catheter; At least one layer of flexible layer material, the inner surface of the flexible layer or in the flexible layer is provided with linear support frames arranged at intervals, and the support frames are made of shape memory alloy; the flexible layer surrounds the interior to form a cavity; the end of the cavity The positioning head is formed by a protrusion away from the catheter. The center of the positioning head is provided with a pinhole-shaped through hole connecting the outside to the cavity. The positioning head is also covered with an annular positioning ring. It realizes the ability to reduce the requirements for ultrasound-guided technology and puncture technology during use, and realizes simple and rapid blood flow occlusion in the hepatic portal vein, so as to implement precise resection. The technical effect of reducing the chance of portal vein metastasis and improving the survival rate of patients in the perioperative period after surgery.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a hepatic portal blood flow blocking device. Background technique [0002] Surgery on high-risk parts of the liver generally requires hepatic blood flow occlusion to prevent excessive bleeding during surgery. The duct system in the liver is very complicated, with three sets of blood vessels criss-crossing and one set of bile duct system, so liver cancer surgery in high-risk areas is often accompanied by bleeding. Chinese patients with liver cancer often have liver cirrhosis in varying degrees and have more bleeding than ordinary patients. [0003] Therefore, we need to perform blood flow occlusion during liver surgery. Blood flow occlusion is divided into local blood flow occlusion, regional blood flow occlusion and whole liver blood flow occlusion. Whole liver blood flow occlusion can ensure "bloodless liver resection", but usually the resection of liver tumors in high-risk p...

AI Technical Summary

Problems solved by technology

Hemihepatic blood flow occlusion still has obvious disadvantages: when the liver is cut, the unblocked hemihepatic section will continue to bleed, and in addition to the possible existence of left and right hepatic communication branches, sometimes the bleeding of the hemihepatic section may be very serious. Not as good as the Pringle method

However, this technology requires corresponding ultrasound technology and puncture technology, which limits its clinical application.

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