Local photodynamic therapy balloon drainage catheter system used in biliary tract cavity

Abstract

The invention discloses a local photodynamic therapy balloon drainage catheter system used in a biliary tract cavity, wherein the system is characterized by comprising a catheter; two balloons are arranged on the catheter, three channels which are not communicated with each other are arranged in the catheter, the three channels are respectively a filling cavity, a drainage cavity and a medicine injection cavity, and the catheter is provided with a liquid through hole for communicating the balloons with the filling cavity; a first side hole communicated with the drainage cavity is formed in the head end of the catheter, and a medicine injection hole communicated with the medicine injection cavity is formed in the position, between the two balloons, of the catheter; and a laser optical fiber with one end penetrating through the medicine injection hole is arranged in the medicine injection cavity. The biliary drainage catheter and the photodynamic therapy balloon are integrally designed, and the two balloons are designed, so that a drainage tube can be fixed, a tumor obstruction part can be accurately positioned, a photosensitizer is locally used, other parts of a body can be prevented from being damaged by photodynamic irradiation as far as possible, photodynamic therapy is accurately implemented, symptoms are relieved, and tumors are treated synchronously, so that the malignant obstructive jaundice is effectively treated in time.

Description

technical field [0001] The invention relates to a local photodynamic therapy balloon drainage catheter system used in a biliary cavity, belonging to the technical field of medical equipment. Background technique [0002] The incidence rate of obstructive jaundice is as high as 90% in cholangiocarcinoma and 56-80% in pancreatic cancer. Due to the late stage of diagnosis, the special anatomical location of the tumor, and the poor general condition of the patients, they cannot tolerate high-intensity tumor treatment. Only a very small number of patients can receive surgical treatment. At present, clinical treatment has mainly relieved symptoms. The conventional clinical treatment is to place drainage tubes and open stents. After the patient's jaundice subsides, anti-tumor treatment will be performed. Biliary drainage and biliary stent implantation have the characteristics of less damage and good drainage effect, and have become the standard treatment methods for obstructive ja...

AI Technical Summary

Problems solved by technology

However, the introduction of the light source and the need for repeated treatments are the pain points in the development of photodynamic therapy for intracavitary lesions. Most of the current reports are guided by the cholangioscope (ERCP approach) through the digestive tract. The introduction of optical fiber therapy requires high surgical requirements and high costs.

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