Retractor device for transforming a retrieval device from a deployed position to a delivery position

A method comprising:

• positioning at least a portion of a retrieval assembly of a retrieval device within a channel defined by a retractor such that least a distal terminus of a capture structure of the retrieval assembly is within the channel, wherein the retrieval assembly is coupled to an elongated shaft, and wherein the retrieval assembly is in a deployed configuration in which a cover of the retrieval assembly extends distally relative to the capture structure and surrounds at least a portion of the capture structure;
• securing part of the cover against an outer surface of the retractor;
• and
• while securing the part of the cover, advancing the retrieval assembly distally through the channel such that at least the distal terminus of the capture structure extends distally from the retractor and the cover.