Patent ID: 11890182
Assignee: LIFETECH SCIENTIFIC (SHENZHEN) CO., LTD
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 2:
3. A covered stent, wherein the covered stent comprises:
a covered unit; and
a bare unit, which is a ring-shaped structure and arranged on a periphery of an end portion of the covered unit, wherein the bare unit comprises an inward-tilting wave body comprising a first wave crest and a first wave rod, with the first wave rod connected to the first wave crest, the first wave crest is further from the covered unit than other positions of the inward-tilting wave body, the first wave rod is planar, and from the first wave crest to an end of the bare unit adjacent to the covered unit a radial distance from the inward-tilting wave body to a central axis of the covered unit gradually increases;
wherein the covered unit comprises a first wave ring, a second wave ring and a connector, the first wave ring is relatively closest to the bare unit, and the connector extends parallel to the central axis and is connected between the first wave ring and the second wave ring; an extension line of the connector has an intersection point with the periphery of the end portion of the covered unit, the inward-tilting wave body, which occupies a circular arc on the periphery of the end portion of the covered unit close to the bare unit, has a midpoint that circumferentially bisects the arc, and a center angle of a minor arc between the intersection point and the midpoint on the periphery of the end portion of the covered unit close to the bare unit is less than or equal to 120°.