| 摘要 |
The present invention relates to a plastic stent that is inserted into a lesion, which has become narrow on account of a tumor or disease in a bile duct, a pancreatic duct, etc. of a human body, in order to widen the lesion. The plastic stent comprises: a body part (10) that is particularly a plastic shape-memory tube and has an inlet (11) and an outlet (12) formed in the upper and lower ends thereof for the inflow and outflow of a body fluid; an upper support part (20) that has a spiral shape and is formed on the upper portion of the body part (10) to support the body part (10) so as to prevent the stent from being separated from an installation position in a human body; and a lower discharge part (30) formed on the lower portion of the body part (10), wherein the lower discharge part is wound and bent in a circular shape. The upper support part (20) can prevent the plastic stent from piercing a tissue to damage or perforate the tissue when being inserted into, and installed in, a lesion and can maximize the contact area with the internal tissue to enhance a support force, thereby effectively preventing the plastic stent from being separated from the installed state, and the lower discharge part (30) can also prevent a perforation and blockage of the lower portion due to food, etc. and can make a body fluid smoothly flow. |
