A stent retriever for removing a thrombus from a blood vessel includes a body portion formed by a mesh sheet formed into a substantially cylindrical shape. The mesh sheet includes a pair of undulating wire members coupled to a connecting member, each wire member having a plurality of protrusions and a plurality of recesses. The plurality of protrusions on a first side of the mesh sheet are offset from the plurality of protrusions on a second side of the mesh sheet such that when the mesh sheet is formed into the substantially cylindrical shape, the wire members are disposed in an interlocking arrangement such that the recesses on the first side receive at least portions of the protrusions on the second side. At least one of the plurality of protrusions includes a subprotrusion formed in the wire member to increase the mesh density of the stent retriever.
