1. A medical device, comprising: (a) an elongated tubular body with inner and outer edges； (b) at least one expandable element on the outer edge of the elongated body； and (c) an expandable tubular sleeve surrounding at least one portion of the expandable member, said tubular sleeve comprising at least two portions with different sealing ratios. The medical device according to claim 1, in which the expandable element is a cylinder. The medical device according to claim 1, wherein the expandable member is self-expanding. The medical device of claim 1, wherein the expandable member is mechanically expandable. The medical device of claim 1, wherein the expandable member has a constant thickness. The medical device according to claim 1, wherein the expandable tubular sleeve has a constant thickness after expansion. The medical device of claim 1, wherein the expandable tubular sleeve has a constant thickness prior to expansion. The medical device according to claim 1, wherein the expandable tubular sleeve is attached to the expandable element. The medical device of claim 1, wherein the expandable tubular sleeve comprises one or more materials having a porous microstructure. The medical device according to claim 9, wherein the material is expanded polytetrafluoroethylene. The medical device according to claim 9, in which the material is ultra high molecular weight polyethylene. The medical device according to claim 9, in which the material is fibrous. The medical device according to claim 1, in which various sealing coefficients of at least two sections of the expandable tubular sleeve in1. Устройство медицинское, содержащее:(a) продолговатый трубчатый корпус с внутренним и внешним краями；(b) по меньшей мере, один расширяемый элемент на внешнем крае продолговатого корпуса； и(c) расширяемый трубчатый рукав, окружающий, по меньшей мере, один участок расширяемого элемента, указанный трубчатый рукав содержит, по меньшей мере, два участка с различными коэффициентами уплотнения
