Patent ID: 7621923
Filing Date: 2009-11-24
Classification: A61B

Abstract:
1. A retrieval device for collecting a specimen comprising: an outer cannula member having an inner lumen; an inner member received within the inner lumen such that the inner member can rotate relative to the outer cannula, the inner member having a solid distal end and a guide channel formed in the inner member at a location spaced from the distal end, the guide channel being open at a distal end along a side of the inner member, the guide channel being open at an opposite proximal end, the side of the inner member being continuous with an outer surface of the outer cannula when the inner member is in a first position and a head of the inner member is disposed adjacent a distal end of the outer cannula member; and a first snare coil having a first distal end and an opposing second proximal end, the first end of the snare coil being fixedly attached to an outer surface of the outer cannula, the snare coil having a portion that is looped about the outer cannula from the first end of the snare coil to the opening of the guide channel spaced from the distal end of the inner member where the snare coil enters the guide channel and extends therethrough such that the second end of the snare coil passes through the opening of the guide channel spaced from the distal end of the inner member to allow a length of the snare coil to be varied by an operator for increasing a diameter of the snare coil loops, the snare coil being actuated by rotating the inner member relative to the outer cannula so as to either open or close the snare coil for collecting the specimen.