An adaptor for a powered surgical instrument includes a casing, a cam drum, a first linear driver, and a second linear driver. The cam drum defines and is translatable along a longitudinal axis of the adaptor between a retracted position and an advanced position. The cam drum is being supported for rotation about the longitudinal axis. The cam drum defines first and second radial cam grooves about an outer surface thereof. The first cam groove defines a first profile and the second cam groove defines a second profile. The first linear driver includes a first cam follower disposed in the first cam groove and the second linear driver includes a second cam follower disposed in the second cam groove. The first and second linear drivers are supported for movement between advanced and retracted positions in response to rotation of the cam drum.

A manipulator adapted to grasp and draw tissue comprises first and second arms having proximal ends and distal ends separated by a distance. First and second grasping surfaces each connected to and extending from respective distal ends of the first and second arms are biased toward each other by a respective spring force. When the first and second arms are actuated to reduce the distance, the manipulator is configured such that tissue arranged between the first and second grasping surfaces resist actuation of the first and second arms. The first and second arms are further actuatable to overcome the spring force of the first and second grasping surfaces so that the first and second grasping surfaces pivot at respective pivot points such that the distance between the distal ends of the first and second arms is reduced.

Methods for treating tissue, and surgical assemblies and related methods are disclosed in which a single input is used to sequentially articulate two members. A medical device includes an input link movable through an input link range of motion, a jaw coupled with the input link, and a tissue manipulation member coupled to the input link and positioned to manipulate a tissue gripped by the jaw. The input link range of motion includes a first portion and a second portion. The input link within the first portion of the input link range of motion drives the jaw through a jaw range of motion. The input link within the second portion of the input link range of motion drives the tissue manipulation member through a tissue manipulation member range of motion.

A surgical device includes an adapter assembly and a tool assembly that is coupled to the adapter assembly by a pivot member to facilitate articulation of the tool assembly in relation to the adapter assembly. The adapter assembly supports a drive assembly for actuating or firing the tool assembly. The adapter assembly includes an articulation mechanism that adjusts the position of the tool assembly in relation to the drive assembly to compensate for changes in stroke length of the drive assembly that result from articulation of the tool assembly.

An elongate shaft assembly for use with a stitching device includes a hub assembly and an end effector. The hub assembly includes insertion and engaging portions. The insertion portion includes a main rod, a rotatable hub operatively coupled with the main rod such that axial displacement of the main rod rotates the rotatable hub, and first and second arms operatively coupled with the rotatable hub such that rotation of the rotatable hub causes reciprocating axial displacement of the first and second arms. The engaging portion is movable relative to the insertion portion between a reload position in which the rotatable hub is in a distal-most position and rotatable independent of axial displacement of the main rod, and a loaded position in which axial displacement of the main rod rotates the rotatable hub.

Methods for treating tissue, and surgical assemblies and related methods are disclosed in which a single input is used to sequentially articulate two members. A surgical assembly includes an end effector, a base supporting the end effector, an input link movable relative to the base through a range of motion between a first configuration and a second configuration, and an actuation mechanism. The end effector includes a first articulated member and a second articulated member. The actuation mechanism drivingly couples the input link to the first articulated member within a first portion of the range of motion and drivingly coupling the input link with the second articulated member within a second portion of the range of motion so that a movement of the input link from the first configuration to the second configuration articulates the first articulated member and then articulates the second articulated member.

An instrument including an actuation gear mechanism that provides two functions of a tool. The actuation gear mechanism comprises a cam mechanism and a gear segment mechanism. The circumference of the cam disk of the cam mechanism—in a first section (α1)—is a spiral curve for generating a stroke for closing the forceps tool, while the circumference of the cam disk—in a second, adjoining, angular range (α2)—is circular. When the cam disk with the circular curved line biases the spring means, no further movement takes place on the output of the cam mechanism. Preferably, two congruent cam disks are provided, whereby these—together with the driving gear and the segment gear, as well as the shaft—form a one-piece plastic injection-molded part. The installation space between the cam disks can be utilized for a slide with a gear rack for shifting the knife.

A surgical device includes an adapter assembly and a tool assembly that is coupled to the adapter assembly by a pivot member to facilitate articulation of the tool assembly in relation to the adapter assembly. The adapter assembly supports a drive assembly for actuating or firing the tool assembly. The adapter assembly includes an articulation mechanism that adjusts the position of the tool assembly in relation to the drive assembly to compensate for changes in stroke length of the drive assembly that result from articulation of the tool assembly.

A manipulator adapted to grasp and draw tissue comprises first and second arms having proximal ends and distal ends separated by a distance. First and second grasping surfaces each connected to and extending from respective distal ends of the first and second arms are biased toward each other by a respective spring force. When the first and second arms are actuated to reduce the distance, the manipulator is configured such that tissue arranged between the first and second grasping surfaces resist actuation of the first and second arms. The first and second arms are further actuatable to overcome the spring force of the first and second grasping surfaces so that the first and second grasping surfaces pivot at respective pivot points such that the distance between the distal ends of the first and second arms is reduced.

A retrieval device attachable to a scope includes a handle which has an attachment portion configured to couple the handle to the scope; a shaft coupled to the handle having a wire immovably coupled to the handle; and a sheath movable relative to the handle over the wire between a distal position and a proximal position via an actuator of the handle. The actuator actuates a slider assembly of the handle. The slider assembly is coupled to the sheath and movable relative to the attachment portion to move the sheath and an expandable end effector coupled to the distal end of the wire. The end effector is movable between a collapsed configuration when the sheath is moved distally to the distal position to cover the end effector and an expanded configuration when the sheath is moved proximally to the proximal position, uncovering the end effector.