An interventional device delivery system and sheath core thereof

Abstract

The invention discloses an interventional device delivering system and a sheath core thereof. The sheath core comprises a core tube, wherein one end of the core tube is a far end connected with an interventional device, and the other end of the core tube is a near end; and a damping layer is coated on the periphery of the core tube. The interventional device delivering system comprises a sheath tube and the sheath core inside the sheath tube. Through simple improvement on the structure of the sheath core, the interventional device can be released more easily, safely and reliably, positioning of the interventional device in a human body is facilitated, water injection and gas exhaust are more complete and the production cost is not increased.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an interventional device delivery system and a sheath core for facilitating the release and recovery of the interventional device. Background technique [0002] When the patient's own heart valve (mitral valve, tricuspid valve, aortic valve or pulmonary valve) is mutated due to congenital or acquired diseases, causing the valve to fail to open and close normally, it will affect healthy life and even life. The variation of the heart valve can be divided into insufficiency and insufficiency, both of which can cause increased heart load. Whether the heart can still work normally under this load is the main basis for deciding whether the human heart valve should be replaced. [0003] When the patient needs to replace the valve, the existing method is to adopt an open surgical operation to replace the valve. The doctor will open the patient's chest and stop the heart, and then...

AI Technical Summary

Problems solved by technology

[0007] At present, the core tube of the sheath core is a spring tube made of steel wire, with a rough surface and high friction, which increases the resistance of the relative movement between the sheath tube and the sheath core, and increases the difficulty of recovering and releasing the stent

[0008] In addition, before the valve replacement operation, the sheath core needs to be injected with water (heparinized saline) and exhausted outside the body to prevent the gas from entering the human body during the operation and forming an air embolism, which threatens the safety of the patient. However, the spring The tubular sheath core is not tightly sealed and is prone to water leakage, which may lead to the risk of incomplete exhaust

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