Abstract: A sheath facilitating retraction of prosthetic implant is provided. The sheath includes a tubular body, and the distal end of the body is connected with an expandable section. The expandable section has relative converged configuration and flared configuration and includes a primary expandable area and a secondary expandable area. The primary expandable area includes a plurality of first expandable pieces arranged at intervals in a circumferential direction of the body. The secondary expandable area includes a plurality of second expandable pieces arranged at intervals in the circumferential direction of the body, and all the second expandable pieces include two alternating groups consisting of a first group formed by further extending the first expandable pieces to the distal end and a second group formed by connecting strips wound between two adjacent first expandable pieces.

Abstract: The embodiments of this application provide a user resource management method, apparatus and device and a computer readable storage medium. The user resource management method provided by a computer executing software includes: obtaining basic information of a user resource and association information of the user resource and a first resource via a human-machine interface or a network interface; determining whether the first resource is in need of to be invoked based on the association information; invoking the first resource in response to determination of the need; and determining change of the first resource required by the user resource utilizing a rule-based engine according to at least part of the basic information, and updating the first resource using the change.