A medical device includes an elongate body having a proximal portion and a distal portion. The proximal portion of the elongate body terminates in a free end and the distal portion forms a loop. The loop includes a proximal portion and a distal portion, and a plurality of barbs disposed along a surface thereof. A pledget is disposed adjacent the proximal portion of the loop. The elongate body, loop, and/or barbs may be formed from shape memory polymers that are configured to change shape in vivo upon application of energy. Methods for securing medical devices of the present disclosure are also disclosed.