Patent ID: 7824416

Claim:
A medical retrieval device, comprising: a handle; a sheath extending distally from the handle and comprising a proximal end, a distal end, and a lumen extending therethrough; a retrieval assembly moveable relative to the sheath, the retrieval assembly achieving an enclosed position when within the lumen of the sheath and an extended position when beyond the distal end of the sheath, the retrieval assembly comprising a proximal end, a distal end, a lumen, and a plurality of legs, at least one of the plurality of legs comprising an axially disposed lumen for receiving a fluid, the retrieval assembly further comprising a first diameter and a second diameter, wherein the second diameter is greater than the first diameter, wherein the retrieval assembly achieves the second diameter when the fluid is introduced into the lumen of the at least one leg, and the plurality of legs consisting of legs fixedly connected to one another only at both the proximal end of the retrieval assembly and the distal end of the retrieval assembly; and an elongated member extending from a distal end of the handle, the elongated member disposed within the lumen of the sheath and operably attached to the proximal end of the retrieval assembly, wherein the elongated member includes only one axially disposed lumen; and wherein the lumen of the sheath houses only the retrieval assembly and the elongated member having the only one axially disposed lumen.