A retrieval device, comprising: a sheath (502, 702, 1804) including a distal end and a proximal end; an end effector (142, 1806) at the distal end of the sheath (502, 702, 1804), the end effector (142, 1806) including a support member (130, 132, 134, 703) fixedly coupled to the distal end of the sheath (502, 702, 1804), and a movable member (106, 108, 110, 118) extending through the support member (130, 132, 134, 703), wherein the movable member (106, 108, 110, 118) and the support member (130, 132, 134, 703) form capture members of the end effector (142, 1806); a handle assembly (744, 1802) at the proximal end of the sheath (502, 702, 1804), the handle assembly (744, 1802) including an actuation member (746, 1808) operable to move the movable member relative to the support member for transitioning the end effector (142, 1806) between an extended state and a retracted state; characterised by a biasing member (503, 703, 1816) coupled to at least one of the actuation member (746, 1808) and the sheath (502, 702, 1804), the biasing member (503, 703, 1816) controlling a force exerted by one of the movable member (106, 108, 110, 118) and the support member (130, 132, 134, 703) on the other of the movable member (106, 108, 110, 118) and the support member (130, 132, 134, 703), the force being generated by relative movement between the movable member (106, 108, 110, 118) and the support member (130, 132, 134, 703), wherein the biasing member (503, 703, 1816) is movable between a rest state and a biasing state, the biasing member (503, 703, 1816) being compressed or elongated when moving from the rest state to the biasing state, wherein the biasing member (503, 703, 1816) moves to the biasing state and takes up forces when the force exerted between the support member (130, 132, 134, 703) and the movable member (106, 108, 110, 118) is outside of a predetermined range, wherein the predetermined range is selected to ensure that the force between the movable member (106, 108, 110, 118) and the support member (130, 132, 134, 703) is limited to avoid damages of the support member (130, 132, 134, 703) by the movable member (106, 108, 110, 118), wherein the biasing member (503, 703, 1816) surrounds at least a portion of the sheath (502, 702, 1804). a sheath (502, 702, 1804) including a distal end and a proximal end; an end effector (142, 1806) at the distal end of the sheath (502, 702, 1804), the end effector (142, 1806) including a support member (130, 132, 134, 703) fixedly coupled to the distal end of the sheath (502, 702, 1804), and a movable member (106, 108, 110, 118) extending through the support member (130, 132, 134, 703), wherein the movable member (106, 108, 110, 118) and the support member (130, 132, 134, 703) form capture members of the end effector (142, 1806); a handle assembly (744, 1802) at the proximal end of the sheath (502, 702, 1804), the handle assembly (744, 1802) including an actuation member (746, 1808) operable to move the movable member relative to the support member for transitioning the end effector (142, 1806) between an extended state and a retracted state; characterised by a biasing member (503, 703, 1816) coupled to at least one of the actuation member (746, 1808) and the sheath (502, 702, 1804), the biasing member (503, 703, 1816) controlling a force exerted by one of the movable member (106, 108, 110, 118) and the support member (130, 132, 134, 703) on the other of the movable member (106, 108, 110, 118) and the support member (130, 132, 134, 703), the force being generated by relative movement between the movable member (106, 108, 110, 118) and the support member (130, 132, 134, 703), wherein the biasing member (503, 703, 1816) is movable between a rest state and a biasing state, the biasing member (503, 703, 1816) being compressed or elongated when moving from the rest state to the biasing state, wherein the biasing member (503, 703, 1816) moves to the biasing state and takes up forces when the force exerted between the support member (130, 132, 134, 703) and the movable member (106, 108, 110, 118) is outside of a predetermined range, wherein the predetermined range is selected to ensure that the force between the movable member (106, 108, 110, 118) and the support member (130, 132, 134, 703) is limited to avoid damages of the support member (130, 132, 134, 703) by the movable member (106, 108, 110, 118), wherein the biasing member (503, 703, 1816) surrounds at least a portion of the sheath (502, 702, 1804).