US Patent 11071559 Tissue specimen retrieval devices with integrated bag cut-off mechanism

A tissue specimen retrieval device includes a first shaft and a second shaft telescopically movable relative to the first shaft. The second shaft supports an end effector assembly at a distal end portion thereof and is movable relative to the first shaft between a retracted position, wherein the end effector assembly is disposed within the first shaft, and a deployed position, wherein the end effector assembly extends distally from the first shaft. The end effector assembly includes a tissue specimen bag supported by a first arm and a second arm. The first and second arms are configured to open the tissue specimen bag when the second shaft is deployed. A cut-off slider is operably associated with the distal end portion of the second shaft and is configured to sever the tissue specimen bag upon retraction of the second shaft.