Delivery catheter and delivery device for prosthetic valve

A technology of artificial valve and delivery catheter, which is applied in the field of medical devices and can solve the problems of difficult and precise release of artificial valve.

Pending Publication Date: 2020-07-07
SHANGHAI MICROPORT CARDIOFLOW MEDTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a new type of artificial valve delivery catheter and delivery device to solve the problem that artificial valves with irregular cross-sections are difficult to accurately release

Method used

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  • Delivery catheter and delivery device for prosthetic valve
  • Delivery catheter and delivery device for prosthetic valve
  • Delivery catheter and delivery device for prosthetic valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment one: if Figure 5 As shown, the inner wall of the sheath tube 12 and the outer wall of the fixing head 14 form a nested structure, which can realize the fixing of the sheath tube 12 and the fixing head 14 in the circumferential direction. Specifically, such as Figure 6-7 As shown, the inner wall of the sheath tube 12 is provided with protrusions or grooves (C), and the outer wall of the fixing head 14 is provided with grooves or protrusions matching the inner wall protrusions or grooves of the sheath tube 12 .

[0046]Optionally, the shapes of the protrusions or grooves on the inner wall of the sheath tube 12 and the outer wall of the fixing head 14 may be square, triangular, circular or other irregular shapes. Also, the number of protrusions or grooves may be one or plural.

[0047] Optionally, the plurality of protrusions or grooves can be of the same shape or different shapes, and can be evenly distributed in the circumferential direction of the outer w...

Embodiment 2

[0049] Embodiment two: if Figure 8 As shown, the outer wall of the fixing head 14 is provided with at least one section of embedded section 141, and the friction force generated between the embedded section 141 and the sheath tube 12 is greater than the friction force generated between the artificial valve 3 and the sheath tube 12, so that the fixing head 14 and the sheath tube 12 produce friction greater than the valve release force and recovery force. In this embodiment, the sheath tube 12 and the fixed head 14 are locked by friction force to realize coordinated rotation.

[0050] Specifically, a certain section or several sections of material with a high friction coefficient are embedded in the outer wall of the fixing head 14 , and the outer diameter of the embedded section 141 can be changed to achieve frictional locking and unlocking with the sheath tube 12 .

[0051] Preferably, in the above-mentioned delivery device for an artificial valve, the static friction coeffi...

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PUM

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Abstract

The invention provides a delivery catheter and a delivery device for a prosthetic valve. The delivery catheter comprises an outer tube assembly and an inner tube assembly, wherein the outer tube assembly comprises a sheath tube which can accommodate the prosthetic valve and an outer tube fixedly connected to one end of the sheath tube; the inner tube assembly comprises an inner tube and a fixed head fixedly connected with the inner tube; the inner tube assembly is arranged in a cavity of the outer tube assembly; and circumferential positioning fit is formed between the sheath tube and the fixed head; and therefore, when the inner tube rotates in the circumferential direction, the fixed head and the sheath tube are driven to integrally rotate to adjust the matching between the prosthetic valve and a native valve ring, and a three-dimensional configuration required for positioning is maintained. After the proper adjustment is realized, the outer tube serves as the driving force of the sheath tube, and when the sheath tube needs to do axial movement, the sheath tube is driven to move in the axial direction by the outer tube to achieve the purpose of releasing the prosthetic valve.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a delivery catheter and a delivery device for an artificial valve. Background technique [0002] With the development of social economy and the aging of the population, the incidence of valvular heart disease has increased significantly. Studies have shown that the incidence of valvular heart disease in the elderly population over 75 years old is as high as 13.3%. At present, traditional surgical treatment is still the first choice for patients with severe valvular disease, but for patients who are elderly, complicated with multiple organ diseases, have a history of thoracotomy, and have poor heart function, the risk of traditional surgery is high and death The rate is high, and some patients do not even have the chance of surgery. Transcatheter heart valve replacement has the advantages of no need for thoracotomy, less trauma, and faster recovery of patients, and has at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/24
CPCA61F2/2466A61F2/0095A61F2/2436A61F2002/9665A61F2/9517A61F2/962A61F2/9522A61F2/2418
Inventor 吴旭闻梅杰桂宝珠陈国明李雨
Owner SHANGHAI MICROPORT CARDIOFLOW MEDTECH CO LTD
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