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Necking-down and bending-adjustable micro catheter

A technology of microcatheter and bending adjustment, applied in the field of microcatheter, which can solve the problems of blood vessel blockage and inability to bend

Pending Publication Date: 2021-05-11
NANJING DRUM TOWER HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a microcatheter that can be narrowed and can be bent to solve the problem of the catheter in the prior art. The problem of not being able to flexibly bend according to blood vessels

Method used

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  • Necking-down and bending-adjustable micro catheter
  • Necking-down and bending-adjustable micro catheter
  • Necking-down and bending-adjustable micro catheter

Examples

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Embodiment

[0026] Example: such as figure 1 As shown, a microcatheter that can be narrowed and can be bent includes a catheter body used to deliver a stent or a brain protection device to a vascular site in a patient. The catheter body includes a head end, a proximal end, and a connecting head end and The tube body at the proximal end includes multiple leaves that can be opened and closed independently at the head end, and a serpentine tube is installed in each leaf, and the proximal end includes a retractor and a plurality of tractors that are uniformly installed on the side of the retractor and are used to operate the retractor. The handle, along its axial direction in the tube body, is equipped with a plurality of traction lines corresponding to the positions of each blade, wherein each traction line is used to connect the corresponding snake tube and the handle, operate each handle, and control the tractor to pull each traction line , to drive each snake tube to shrink or stretch, an...

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PUM

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Abstract

The invention discloses a necking-down and bending-adjustable micro-catheter, and belongs to the technical field of medical instruments. The necking-down and bending-adjustable micro-catheter comprises a catheter main body used for conveying a stent or a protection device to a vessel part in a patient body, and the catheter main body comprises a head end, a near end and a catheter body connecting the head end with the near end. Each handle is used for operating a tractor, so that a traction line connected with the handles is retracted and released, each blade is controlled to swing under the traction of the traction line, the head end can turn towards an expected direction according to requirements, and the catheter can be freely and flexibly pushed in a bent multi-fork blood vessel in a human body to reach a targeted part; and in addition, one ends, away from the catheter body, of the blades can be controlled to be synchronously folded inwards to form a conical head end under simultaneous operation of the handles, the problems that the catheter is large in outer diameter and poor in passing ability, and thrombus on the blood vessel wall is easily scraped off are solved, the functionality and reliability of the catheter are improved, and the catheter is simple in structure, flexible to operate and convenient to use.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a shrinkable and adjustable bendable microcatheter. Background technique [0002] Microcatheters are used to deliver stents, coils, stents or brain protection devices to vascular sites in patients. During the arterial opening process of acute cerebral artery occlusion, the protection against distal embolism is still blank, but once distal embolism occurs, it will Seriously damage the patient's health. At present, the protective device on the market is a self-contained delivery catheter, which cannot be delivered through a microcatheter. The outer diameter of the catheter is large and the passability is poor, so it cannot be used for the opening protection of acute aortic occlusion. The thrombus scrapes off and enters the distal end of the nerve and blood vessel, causing the distal blood vessel to be blocked and forming a cerebral infarction. In addition, when the cathete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/22A61M25/01A61M25/00
CPCA61B17/22A61M25/0105A61M25/0136A61M25/0054A61M25/0082
Inventor 李敬伟董海林叶永红徐运罗云
Owner NANJING DRUM TOWER HOSPITAL
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