Thrombectomy systems and devices and methods of using the same. In an exemplary embodiment of a thrombectomy system of the present disclosure, the thrombectomy system comprises a thrombectomy sheath, comprising a circumferential outer wall reinforced with a reinforcement, configured as an elongated tube having a lumen therethrough； and a sonovisible element positioned at or near a distal end of the circumferential outer wall； wherein the thrombectomy sheath is sized and shaped to be at least partially positioned within a vein proximal to a thrombus or other item within the vein and further configured to expand to contact the vein to secure the thrombectomy sheath within the vein； and wherein the lumen is sized and shaped to receive a device selected from the group consisting of a balloon catheter and a snare having a loop.
