A surgical instrument includes a housing, a shaft extending therefrom, an end effector assembly supported by the shaft, a movable handle, and a drive assembly. The drive assembly includes a translatable drive member for actuating the end effector assembly, and a torsion spring including first and second legs. The first leg is configured to translate through the housing in response to movement of the movable handle relative to the housing. The second leg is configured to translate through the housing in cooperation with the first leg to move the drive member longitudinally when a force acting on the drive member is less than a threshold force, and to remain in fixed position, thereby tensioning the torsion spring and retaining the drive member in fixed position when the force acting on the drive member is equal to or exceeds the threshold force.

A surgical instrument includes a housing, a shaft extending therefrom, an end effector assembly supported by the shaft, a movable handle, and a drive assembly. The drive assembly includes a translatable drive member for actuating the end effector assembly, and a torsion spring including first and second legs. The first leg is configured to translate through the housing in response to movement of the movable handle relative to the housing. The second leg is configured to translate through the housing in cooperation with the first leg to move the drive member longitudinally when a force acting on the drive member is less than a threshold force, and to remain in fixed position, thereby tensioning the torsion spring and retaining the drive member in fixed position when the force acting on the drive member is equal to or exceeds the threshold force.

A surgical instrument includes a housing, a shaft extending therefrom, an end effector assembly supported by the shaft, a movable handle, and a drive assembly. The drive assembly includes a translatable drive member for actuating the end effector assembly, and a torsion spring including first and second legs. The first leg is configured to translate through the housing in response to movement of the movable handle relative to the housing. The second leg is configured to translate through the housing in cooperation with the first leg to move the drive member longitudinally when a force acting on the drive member is less than a threshold force, and to remain in fixed position, thereby tensioning the torsion spring and retaining the drive member in fixed position when the force acting on the drive member is equal to or exceeds the threshold force.

A surgical instrument includes a housing, a shaft extending therefrom, an end effector assembly supported by the shaft, a movable handle, and a drive assembly. The drive assembly includes a translatable drive member for actuating the end effector assembly, and a torsion spring including first and second legs. The first leg is configured to translate through the housing in response to movement of the movable handle relative to the housing. The second leg is configured to translate through the housing in cooperation with the first leg to move the drive member longitudinally when a force acting on the drive member is less than a threshold force, and to remain in fixed position, thereby tensioning the torsion spring and retaining the drive member in fixed position when the force acting on the drive member is equal to or exceeds the threshold force.

A tissue removal tool for use with an endoscope. The tool includes a loop formed by a piece of wire. The loop is movable between an open position and a closed position. The shape of the loop is defined in the open position by a proximal portion and a distal portion. The piece of wire may have a cross-sectional height in the proximal portion unequal to a cross-sectional height in the distal portion.

Embodiments of the present disclosure provide a device for extracting and/or morcellating tissue or other unwanted material from within a patient's body. In one embodiment, a medical device may include an elongate member including a proximal end, a distal end, and a lumen extending therebetween. The medical device may also include an expandable member disposed at the distal end, wherein an interior of the expandable member is in fluid communication with the lumen in the elongate member, wherein the expandable member includes a plurality of conducting elements extending from and disposed circumferentially about the elongate member, wherein at least two of the plurality of conducting elements are joined together by a material extending therebetween.

A tissue grasping device includes a longitudinal axis member; an actuating member provided at a distal end portion of the longitudinal axis member; a wire member elongated to an outside of the actuating member and being curved in a loop shape; a through hole formed in a distal end surface of the actuating member and holding a first end side of the wire member such that the first end side of the wire member is capable of moving with respect to the actuating member; and a direction restriction portion provided at a side surface of the actuating member and fixing a second end portion of the wire member to the actuating member such that an elongated direction of a second end side of the wire member is coincide with a direction intersecting a side surface of the actuating member.

A snare for retrieving foreign objects within the body of a patient including a hollow elongate tubular member comprising an inner surface and an outer surface and a lumen defined by the inner surface, a proximal end and a distal end, the hollow elongate tubular member forms a loop at the distal end, the loop having an open position and a closed position, the loop comprising at least one opening and a wire slidably disposed in the lumen of the elongate tubular member, the wire comprising at least one engaging member for engaging tissue, the at least one engaging member extends through the at least one opening in the hollow elongate tubular member when the wire is in a first position and the at least one engaging member retracts into the lumen of the elongate tubular member when the wire is moved to a second position.

An article including: a battery support containing battery lead wires attached to terminals; an opposing battery support attached to the battery support to create a battery closure; one or more batteries having battery contacts in the opposing battery support; and one or more activation tabs; wherein the terminals are attached to spring-loaded members; wherein the one or more activation tabs are spaced between the terminals and the battery contacts; wherein the spring-loaded members provide a biasing force that biases the terminals against the activation tabs keeping the one or more activation tabs in place in either a first position or a second position of the opposing battery support; wherein the opposing battery support is securely connected to the battery support in both the first position and the second position; and wherein the biasing force is greater in the second position than in the first position.

An apparatus for collection and removal of morcellated tissue includes a flexible sheet material including a top surface and a bottom surface. The sheet material is configurable from a roll configuration, to a substantially planar mat configuration, to a pouch configuration.