Stent conveying and releasing device and stent conveying and releasing system
A technology for releasing devices and releasing components, which is applied in the field of medical devices and can solve problems such as stent release failure and inaccurate stent release position
Pending Publication Date: 2021-07-09
HANGZHOU WEIQIANG MEDICAL TECH CO LTD
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Problems solved by technology
[0004] The purpose of the present invention is to provide a stent delivery release device and a stent delivery release system to solve the problem that the proximal or distal end of the stent has been released when the stent has not reached the release condition, resulting in inaccurate release position of the stent. Technical issues that ultimately lead to failure of stent release
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[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0040] It should be noted that, for a stent, the end close to the heart after being implanted in the blood vessel is generally called the "proximal end" of the stent, and the end far away from the heart after being implanted in the blood vessel is called the "distal end" of the stent, and the definition is based on this principle. The "proximal" and "distal" ends of any part of a stent. For the conveyor, generally, the end that is relatively close to the operator i...
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The invention provides a stent delivery and release device, which is used for releasing a stent in a blood vessel and comprises a guide head, a sheath core assembly, a sheath tube assembly, a control piece and a stent near-end release assembly, the guide head is arranged at the far end of the sheath core assembly, and the stent near-end release assembly is arranged at the near end of the sheath core assembly. The sheath core assembly is sleeved with the sheath tube assembly, the control piece is detachably connected with the guide head, and the stent near-end releasing assembly repeatedly tightens or releases the stent near end by controlling the axial length of the control piece. According to the invention, the technical problem that the release position of the stent is inaccurate and finally the stent is failed to release because the near end or the far end of the stent is released under the condition that the release condition of the stent is not met is solved.
Description
technical field [0001] The invention relates to the field of medical devices, in particular to a stent delivery and release device and a stent delivery and release system. Background technique [0002] Endovascular repair of thoracoabdominal vascular disease is an effective treatment option that has gained enormous popularity over the past decade. A stent graft is an implantable device consisting of a tubular surgical graft sheath and a self-expanding frame. The vascular stent needs to be released in the vascular segment that needs to be repaired through the cooperation of the delivery system. The vascular stent is placed in the blood vessel, which can block the aneurysm and rebuild the blood flow path, so that the hemodynamic pressure cannot reach the vascular lesion site. Because whether it is a true aneurysm, a false aneurysm or a dissecting aneurysm, it is due to different degrees of damage and disease of the blood vessel, and the shape of the blood vessel itself may b...
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IPC IPC(8): A61F2/966
CPCA61F2/966
Inventor 李安伟桂鹏王雷赵文斌王永胜
Owner HANGZHOU WEIQIANG MEDICAL TECH CO LTD