Medical devices, such as forceps including a handpiece having a housing and an inner shaft that extends out of the handpiece along a longitudinal axis to transfer motion to an end effector. The inner shaft being rotatable with respect to the handpiece. An outer shaft that is rotatable with respect to the housing is boated around the inner shaft. The medical device further including an end effector coupled to the inner shaft and the outer shaft. The outer shaft rotationally constrained to the inner shaft at a first longitudinal location and at a second longitudinal location.

An ultrasonic instrument comprises a handle assembly or other kind of body configured to receive an ultrasonic transducer, a shaft assembly having an acoustic waveguide and an ultrasonic blade, and a removable clamp arm. The ultrasonic blade is in acoustic communication with the acoustic waveguide such that the ultrasonic transducer is operable to drive the ultrasonic blade to vibrate ultrasonically via the acoustic waveguide. The clamp arm is configured to selectively couple with and decouple from the shaft assembly and/or handle assembly of the ultrasonic instrument. The clamp arm may include a coupler or other coupling feature configured to selectively couple the clamp arm with the shaft assembly and/or the handle assembly. The ultrasonic instrument may further comprise a guidance system configured to position and/or orient the clamp arm relative to the ultrasonic instrument.

An ultrasonic surgical device including an elongate waveguide having a longitudinal axis an a distal end, and a blade extending away from the distal end of the waveguide, the blade including a curved portion that includes first and second opposed faces extending lengthwise along at least a portion of the length of the blade. Each of the first and second faces has a width that extends perpendicular to the longitudinal axis of the waveguide and a length that extends orthogonal to the width. A pair of hook portions are located on opposite sides of the blade. A method of fabricating an ultrasonic surgical device is also provided.

Surgical devices are disclosed herein that generally include an intracorporeal elbow joint to facilitate translational movement of an end effector while allowing a body portion of the surgical device and a trocar or working channel through which the device is inserted to be maintained in a fixed angular orientation relative to the patient. This allows a plurality of such devices to be used effectively with a single incision or access device. Such devices also generally provide end effector movement with six degrees of freedom, while maintaining a mechanical linkage between the user and the end effector and while mimicking and/or mirroring natural user movement. Various methods related to such devices are also disclosed.

A surgical instrument, has an end effector that includes an ultrasonic blade, and a clamp arm that moves relative to the ultrasonic blade from an opened position toward an intermediate position and a closed position. The clamp arm is offset from the ultrasonic blade to define a predetermined gap in the intermediate position between the opened position and the closed position. A clamp arm actuator connects to the clamp arm and moves from an opened configuration to a closed configuration to direct the clamp arm from the opened position toward the intermediate position and the closed position. A spacer connects with the clamp arm to inhibit movement of the clamp arm from the intermediate position toward the closed position for maintaining the predetermined gap between the clamp arm and the ultrasonic blade.

Provided is a joint mechanism including two spur gears and; a support member that supports the two spur gears and so as to be rotatable about two joint shafts and that are disposed in a skew-lines positional relationship with a space between each other; and a rotational-force transmitting mechanism that transmits a rotational force between the spur gears and, wherein the rotational-force transmitting mechanism is provided with a transmission member formed of a rigid piece that is supported so as to be movable only in a direction parallel to a line of intersection between planes and that are respectively orthogonal to the two joint shafts and cam mechanisms or linkage mechanisms that are disposed between the transmission member and the two spur gears and, respectively, and that convert rotational motions of the spur gears and to a linear motion of the transmission member.

A treatment tool includes a sheath, a first grasping member, a second grasping member and a swing member. The first grasping member protrudes from a distal portion of the sheath. The second grasping member is rotatably provided to the sheath so that a first angle, which is an angle formed with the first grasping member, changes. The swing member is provided to the second grasping member so as to swing and so that a second angle, which is an angle formed with the second grasping member, changes. When the second angle is at its maximum, there is a first angle at which the first grasping member and the swing member do not contact each other.

A forceps-type treatment instrument includes an end effector including a pair of clamps. In one of the clamps, a swinger is extended along an extending axis and swings relative to a supporting section around a swing axis extended along a direction intersecting with the extending axis and intersecting with an open and close direction of the clamp. A regulating section regulates movement of the swinger in the direction along the swing axis in at least two portions separated from each other in a direction along the extending axis, and thereby prevents rotation of the swinger around a rotation axis along the open and close direction.

A surgical instrument has a first modular assembly and a second modular assembly. The first modular assembly has a body, an ultrasonic waveguide, an ultrasonic blade connected to a distal end of the ultrasonic waveguide, and a coupling member that movably couples with the body. The second modular assembly has a clamp arm assembly with a first pivot coupling, a clamp pad assembly with a second pivot coupling, and a distal outer sheath that selectively couples to the body of the first modular assembly via the coupling member. The distal outer sheath has an interior surface that houses a portion of the ultrasonic waveguide, and this interior surface also houses the first pivot coupling and the second pivot coupling.

A surgical instrument has an ultrasonic blade that connects to a distal end of an ultrasonic waveguide. A clamp arm assembly is moveable from an opened position for receiving a tissue, toward a closed position for clamping the tissue. A clamp arm actuator connected to the clamp arm assembly directs the clamp arm assembly from the opened position toward the closed position. An outer sheath surrounds at least a portion of the ultrasonic waveguide. The outer sheath includes a cover removably received against a sheath body, and a sheath securement feature able to detachably couple the cover to the sheath body such that the cover can be detached from the sheath body for accessing the ultrasonic waveguide within the outer sheath.