Lumen stent system

Abstract

A lumen stent system comprises a lumen stent and a conveying device. The conveying device comprises a sheath, a push tube, an inner core tube, a first anchoring member and a second anchoring member, the push tube is penetratingly arranged in the sheath, the inner core tube penetrates the push tube and extends out from the sheath, the first anchoring member is arranged at the far end of the inner core tube, at least part of the second anchoring member is arranged at the far end of the push tube, and the first anchoring member and the second anchoring member are connected with the far end and the near end of a lumen stent respectively to respectively provide first axial acting force and a second axial acting force opposite in direction so as to load the lumen stent into a cavity formed by surrounding of the inner core tube and the sheath. When the sheath moves to the far end of the sheath along the axial direction of the inner core tube to be flush with the far end of the push tube, thefar end of the lumen stent maintains connection with the first anchoring member while the near end of the same maintains connection with the second anchoring member to enable outer diameter of the lumen stent to be smaller than 90% that of the same in a natural state at least. The lumen stent system can accurately control release position of the lumen stent.

Description

technical field [0001] The invention relates to the field of interventional medical devices, in particular to a lumen stent system. Background technique [0002] At present, in the field of interventional medicine, interventional surgery with compressible lumen stent has become the main method for the treatment of vascular stenosis, aneurysm and dissection due to its small trauma, few complications and good effect. [0003] The lumen stent generally adopts a compressible stent and compresses it into a hollow catheter. Through the puncture port of the human lumen, the stent compressed in the catheter is sent to the lesion under the guidance of digital imaging equipment, and then Through a certain method, the stent is freed from the constraints of the catheter, and the stent is deployed by its own radial support force and attached to the vessel wall to achieve the purpose of treating or alleviating the disease. [0004] In the prior art, the metal structure of the luminal ste...

AI Technical Summary

Problems solved by technology

The delivery and release method of this endoluminal stent cannot adjust the release position of the stent after the sheath is withdrawn

For endoluminal stents with shortening characteristics, when they are released from the sheath, they will shorten from the distal end to the proximal end, so it is difficult to precisely control the release position of the endoluminal stent

Since the existing luminal stent delivery device cannot adjust the position of the luminal stent twice after the luminal stent is released, it cannot accurately control the release position of the luminal stent, and it is difficult to meet the clinical application requirements, especially when There are many branch vessels in the diseased blood vessel where the luminal stent is released, and it is more necessary to precisely adjust the release position of the luminal stent

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