Radioactive particles for treating tumor and implantation method

Abstract

The invention relates to radioactive particles for treating a tumor. The radioactive particles comprise rigidity units and elastic units, wherein the rigidity units internally contain radioactive isotopes which are capable of treating the tumor, the elastic units are elastic bodies which can deform under the action of an external force and can recover the shape after the external force is withdrawn, and each elastic unit is positioned between every two rigidity units and is respectively connected with the rigidity units at two ends. Each elastic unit is arranged between every two rigidity units, the elastic unit can be bent and deform, thus the radioactive particles have good flexibility and can be released through a complicated curved pipeline, and the requirements of implanting conformal radioactive particles in a tumor clinically can be met.

Description

technical field [0001] The invention relates to a radioactive particle, especially an implanted radioactive particle for treating tumors. Background technique [0002] by implanting 125 I, that is, I (iodine) 125 radioactive particles to treat tumors, has become one of the effective methods for the treatment of solid tumors. prior art 125 The typical structure of an I radioactive particle is as follows: 125 I is adsorbed on a silver metal rod with a diameter of 0.5mm and a length of 3.5mm, and then this adsorbed 125 The silver rod of I is packaged in a titanium thin-walled tube with an outer diameter of 0.8 mm and a length of 4.5 mm. Due to this prior art 125 I radioactive particles are rigid cylinders, so they can only be placed through a straight needle implanter. Repeated puncture of the tumor part is required to form effective radioactivity distribution and coverage. There is following shortcoming in this prior art: [0003] 1) One radioactive seed implantation ne...

AI Technical Summary

Problems solved by technology

However, in the process of tumor treatment, it is often necessary to implant radiation particles in multiple directions and distribute them in multiple parts of the tumor, so it is necessary to implement multi-channel puncture particle implantation, that is, multiple percutaneous puncture points, multiple puncture needles and tubes are required. Multiple puncture needle cores, more instruments used, inconvenient distribution and operation, great damage to patients, and high treatment costs

[0004]2) For tumors in special locations, such as retro-rib or retrosternal tumors blocked by bones, intracranial tumors, and tumors in parts with more peripheral blood vessels and intestines, such as Pancreatic tumors, etc., it is difficult for the implantation needles of the prior art to reach the desired position, so it cannot be implemented and operated

[0005]3) The direction and site of implantation cannot be selected and changed, so it is difficult to adapt to the shape of the tumor and cannot achieve conformal implantation

However, the head of this new particle implantation device is a curved needle, that is, a curved needle. The rigid cylindrical 125I radioactive particles in the prior art cannot pass through the curved part of the curved needle. Therefore need to improve the radioactive particle of prior art, provide a kind of new 125I radioactive particle

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