Adjustable curved sheath tube and inferior vena cava filter delivery device

CN110693628BActive Publication Date: 2025-01-10PEKING UNION MEDICAL COLLEGE HOSPITAL
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Patent Information

Application Number
CN201910858389.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2019-09-11
Publication Date
2025-01-10
Estimated Expiration
2039-09-11

AI Technical Summary

Technical Problem

In the prior art, the sheath cannot accurately adjust the distal direction when it travels in the blood vessel, resulting in the inability to release the inferior vena cava filter in parallel, increasing the risk of filter fixation instability and complications.

Method used

An adjustable curved sheath tube is designed. By setting a channel along the length direction in the interlayer of the sheath tube wall, the adjustment wire is used to deflect the distal fixation section of the sheath tube as a whole, so as to realize the sheath tube at the confluence of the left and right iliac veins. Upward bends to reach the parallel state of the inferior vena cava, thus ensuring accurate release of the filter.

Benefits of technology

It improves the safety and effectiveness of filter release and reduces the incidence of complications such as late filter displacement and venous wall penetration.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

The technical scheme disclosed in the present invention relates to an adjustable bending sheath tube and an inferior vena cava filter delivery device. An adjustable bending sheath tube includes a sheath tube body, an adjusting wire and a regulator, wherein the sheath tube body is made of a flexible material, and after entering the body, it can bend along the direction of the blood vessel under the action of the guide wire; the proximal end of the sheath tube body is exposed outside the body and is fixedly connected to the regulator; a channel is provided in the tube wall interlayer of the sheath tube body that runs through along its length direction, and the adjusting wire penetrates from the proximal end of the channel, reaches the distal end of the channel and is fixed to a fixed section arranged in the middle section of the sheath tube body, and the adjusting wire is fixed to the entire length of the fixed section, and the fixed section is in a straight line state in a natural state; the proximal end of the adjusting wire is connected to the adjusting unit of the regulator, and the adjusting wire causes the fixed section to deflect at an angle as a whole under the pulling of the adjusting unit. The technical scheme of the present invention helps to obtain the best fixed position when the vena cava filter is released.
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Citation Information

Patent Citations

  • Adjustable bending sheath tube

    CN102580225A

  • Conveying system of vena cave filter

    CN208741206U

  • Adjustable bent sheathing canal and inferior vena cava filter conveying device

    CN211325884U

  • Adjustable curved sheath and medical instrument

    WO2019019937A1