Patent ID: 11925544
Assignee: SHANGHAI TENDFO MEDICAL TECHNOLOGIES CO. LTD.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A pulmonary artery stent, comprising:
a metal stent capable of circumferential expansion; and
an isolation membrane wrapping the metal stent to isolate the metal stent from an external environment, and the isolation membrane having a circumferential tensile strength less than an axial tensile strength, wherein
the metal stent includes a plurality of support segments, wherein the support segments include a plurality of double wave segments arranged in a circumferential direction, each double wave segment includes two wave segments, and the two wave segments are symmetrically arranged, wherein each of the two wave segments is composed of a plurality of end-to-end support ribs arranged in a wavy shape, support ribs located at connecting ends of the double wave segments and in close proximity to each other are used as connecting ribs, and connecting ribs of any two double wave segments adjacent to each other in the circumferential direction are cross-connected, wherein each of the connecting ribs of each of the two wave segments has a telescopic segment;
the isolation membrane includes an inner film and a plurality of segments of strip-shaped outer film or a plurality of segments of cylinder-shaped outer film;
the inner film covers an inner surface of the metal stent, and each segment of the outer film is connected to the inner film and covers each of the support segments, respectively; and
each of the support segments is connected by the isolation membrane.