Retrieval assemblies configured to capture an obstruction located in a bodily duct of a patient and associated methods are provided. According to one implementation a retrieval assembly is provided that includes a proximal collar, a distal collar and a plurality of elongate clot capturing elements that each has proximal and distal ends that are respectively coupled to the proximal and distal collars. The retrieval device is mounted on an elongate wire with at least one of the proximal collar and distal collar being slideable along a portion of the length of the elongate wire to enable the retrieval device to transition from an unexpanded state to an expanded state. At least a portion of one or both of proximal and distal end sections of the elongate clot capturing elements being arranged curved about a longitudinal axis of the retrieval device when the retrieval device is in the unexpanded state.