Spiral particle stent

Abstract

The invention discloses a spiral particle stent. The spiral particle stent comprises a tubular particle carrier, radioactive particles are arranged in the particle carrier, and the particle carrier is in a tightly arrayed spiral state under natural conditions. When the two ends of the particle carrier are pulled, adjacent spiral coils are separated. When the spiral particle stent is used in a patient, the radioactive particles are fixed into the particle carrier, the particle carrier is pulled into a long and thin state from a thick spiral state, so that the particle carrier is convenient to introduce into the patient body, after the particle carrier enters the patient body, pull force of the particle carrier is removed, the particle carrier is retracted into the thick spiral state again, an obstruction position of a patient cavity is expanded, it is ensured that the patient cavity is smooth up and down, and the radioactive particles in the particle carrier can further carry out irradiating treatment on the neoplastic lesion position. The tubular particle carrier can conveniently carry the radioactive particles, and the situation that the radioactive particles fall in the human body and accordingly the health organization of the patient is affected is avoided.

Description

technical field [0001] The invention relates to a helical particle support. Background technique [0002] In the field of malignant tumors, Nitinol or plastic stents are placed to restore the patency of the cavity for patients who cannot be operated due to cavity obstruction caused by tumors, which is currently more commonly used in clinical practice. The nickel-titanium memory alloy or plastic stent only plays a supporting role to restore the patency of the lumen, but it cannot inhibit the growth of the tumor. After 3 to 5 months, the tumor will continue to grow along the gap of the stent to the inside of the stent, causing the lumen tumor again. Stenosis or obstruction. [0003] The particle stent currently used clinically is a nickel-titanium memory alloy mesh structure. The radiated particles are bound on the wire and are in a contracted state before being introduced into the lumen. After being introduced, the mesh automatically expands to expand the obstructed lumen. ...

AI Technical Summary

Problems solved by technology

Due to the special structure of the biliary tract, the particle stent used in the biliary tract is a sleeve-in type. The advanced bare stent is inserted into a simple particle stent. However, the current structure of the particle stent is more difficult to bind the particles, and it is easy to fall off. The operation is more difficult than the ordinary stent Implant complex

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