Conveying sheath

A sheath tube and reinforcing section technology, applied in the field of delivery sheath tube, can solve the problems of difficulty in maintaining the bending shape, sheath tube rebound or bending, etc., and achieve the effect of good bending compliance and easier expansion.

Active Publication Date: 2019-04-05
东莞市先健医疗有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, due to the large size of the sheath tube, the sheath tube is prone to rebo

Method used

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Examples

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Embodiment Construction

[0026] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention will be described with examples below in conjunction with the accompanying drawings.

[0027] In the field of interventional medicine, the end close to the operator is defined as the "proximal end", and the end far away from the operator is defined as the "distal end"; for long objects, the direction parallel to its length extension direction is defined as "axial"; for transverse For an object with a circular cross section, define the direction surrounding its axial direction as the "circumferential direction", and the line along the circumferential direction as the "circumferential line"; when the object is bent, define the side with the larger bending radius as the "big curved side" , the side with the smaller bending radius is the "small bending side". The following "cutting" refers to completely cutting off the material in the area to form a t...

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Abstract

The invention discloses a conveying sheath. The conveying sheath comprises an inner layer, a middle layer and an outer layer which are arranged from inside to outside in sequence, wherein the middle layer at least comprises a first reinforced segment and a second reinforced segment which is located at the far end of the first reinforced segment and is connected with the first reinforced segment; the second reinforced segment comprises a plurality of repeated cutting units; the plurality of cutting units are arranged along the axial direction of the conveying sheath; the cutting units comprisefirst cutting areas and second cutting areas; the projection lengths of the first cutting areas on the cross section of the second reinforced segment are larger than the projection lengths of the second cutting areas on the cross section of the second reinforced segment; the average axial cutting lengths of the first cutting areas are smaller than the average axial cutting lengths of the second cutting areas. According to the conveying sheath of the invention, the bending angle is not liable to rebound and a good bending shape can be kept after the far end of the conveying sheath is bent and sized towards the first cutting areas.

Description

technical field [0001] The invention relates to the field of interventional medicine, in particular to a delivery sheath. Background technique [0002] Surgical treatment of aortic disease is extremely challenging. Although the relevant surgical techniques, anesthesia, and intensive care measures have been significantly improved, thoracotomy may still lead to a relatively high mortality rate and complication rate. Since the 1990s, minimally invasive interventional techniques have been continuously developed in endovascular exclusion. Compared with traditional surgical operations, minimally invasive interventional techniques have the advantages of less trauma, lower complications and lower mortality. However, limited by the shape of the aorta and the perfusion requirements of the upper branch vessels (the upper branch vessels control all the blood supply to the upper limbs, head, and neck), endovascular treatment in the aortic arch area is still relatively forbidden. [000...

Claims

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Application Information

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IPC IPC(8): A61F2/966
CPCA61F2/966A61F2210/0004
Inventor 谢惠雄江巍王刚
Owner 东莞市先健医疗有限公司
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