Self-expandable plastic support and placement device

Abstract

The invention discloses a self-expandable plastic support which comprises a drainage tube. The drainage tube comprises a near end and a far end, more than one elastic cage-shaped protrusion is arranged between the near end and the far end of the drainage tube, each cage-shaped protrusion is composed of two or more elastic connecting ribs, gaps are formed between the connecting ribs, the inside of the drainage tube is communicated with the outside of the drainage tube through the gaps, a drainage tube developing ring is arranged at the far end of the drainage tube and in the first cage-shaped protrusion close to the far end, and the drainage tube developing ring is fixed on the inner wall of the drainage tube. The invention further discloses a support adapting placement device matched with the self-expandable plastic support. One end of an inner tube is connected with a booster tube, the other end of the inner tube sequentially penetrates through a front handle, a nut, an outer tube, a straightening tube and the self-expandable plastic support, an outer tube developing ring is arranged on the outer wall of the outer tube, an inner tube developing ring is arranged on the outer wall of the inner tube, and the inner tube developing ring is in butt joint with the drainage tube developing ring to form boost of the inner tube on the self-expandable plastic support.

Description

technical field [0001] The invention relates to a medical device implanted in a human body, in particular to a self-expanding plastic bracket and an inserter. Background technique [0002] A plastic stent is a medical device placed in the gallbladder of the human body to guide the flow of bile from the gallbladder to the duodenum. The commonly used stent is usually a catheter-like device with openings at both ends, and the catheter is usually provided with holes. Used for drainage, or with barbs, used for internal fixation of catheters. Because the catheter usually slides back and forth in the human body, there is a risk of falling off, so the two ends of the plastic stent are usually designed into a large bend, pigtail shape, etc., to fix the position of the stent. [0003] However, only small round holes are made at both ends of the stent or on the stent. After a long time, the tissue hyperplasia in the bile duct will easily block the small hole, resulting in narrowing an...

AI Technical Summary

Problems solved by technology

[0003] However, only small round holes are made at both ends of the stent or on the stent. After a long time, the tissue hyperplasia in the bile duct will easily block the small hole, resulting in narrowing and blockage again, requiring a second operation.

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