Abstract: A forceps includes an instrument housing, an elongated shaft assembly extending distally from the instrument housing, and a rotation knob assembly. The rotation knob assembly is supported in the instrument housing and includes a rotation knob and an inner housing. The rotation knob is coupled to the shaft assembly and positioned to rotate about the inner housing to rotate the elongated shaft assembly relative to the instrument housing. The inner housing is coupled to the instrument housing and supports electrical contacts configured to transmit electrical energy through the rotation knob assembly.

Abstract: A surgical instrument includes a movable handle movable relative a housing to manipulate an end effector assembly, and a latch assembly. The latch assembly includes a latch arm including a latch post, and a latch track defining an entry path, a latching path, a saddle, an un-latching path, and a return path. The latch post moves through the entry path, the latching path, and into the saddle upon movement of the movable handle from an un-actuated position to an over-actuated position and back to an actuated position to lock the movable handle. The latch post moves from the saddle through the un-latching path and the return path upon movement of the movable handle from actuated position to the over-actuated position and back to the un-actuated position. The return path includes a ramped surface configured to inhibit reverse travel of the latch post into the return path.

Abstract: A forceps includes an instrument housing, an elongated shaft assembly extending distally from the instrument housing, and a rotation knob assembly. The rotation knob assembly is supported in the instrument housing and includes a rotation knob and an inner housing. The rotation knob is coupled to the shaft assembly and positioned to rotate about the inner housing to rotate the elongated shaft assembly relative to the instrument housing. The inner housing is coupled to the instrument housing and supports electrical contacts configured to transmit electrical energy through the rotation knob assembly.

Abstract: A method of disassembling a surgical instrument for reprocessing, includes accessing an interior housing of a surgical instrument to expose a slider assembly, an elongated outer shaft including a drive plate and knife assembly extending therethrough, and a torsion spring of the surgical instrument. The method further includes grasping an upper leg of the torsion spring to disengage the upper leg from a slot defined within the drive plate, disengaging the drive plate from the slider assembly, and removing the torsion spring from the slider assembly.

Abstract: A method of disassembling a surgical instrument for reprocessing, includes accessing an interior housing of a surgical instrument to expose a slider assembly, an elongated outer shaft including a drive plate and knife assembly extending therethrough, and a torsion spring of the surgical instrument. The method further includes grasping an upper leg of the torsion spring to disengage the upper leg from a slot defined within the drive plate, disengaging the drive plate from the slider assembly, and removing the torsion spring from the slider assembly.

Abstract: A surgical instrument includes a housing, a shaft having a proximal end portion disposed within the housing, and an end effector assembly supported at a distal end portion of the shaft distally-spaced from the housing. A bobbin includes a body, a proximal rim, and a distal cylinder. The bobbin is disposed about the shaft such that at least one protrusion of the shaft is captured within a track defined within the distal cylinder. The bobbin is configured for positioning within the housing such that the body extends through a shaft aperture of a partition of the housing with the proximal rim disposed on a proximal side of the partition and the distal cylinder disposed within an interior cavity defined between the partition and a distal end of the housing on a distal side of the partition, thereby rotatably supporting the proximal end portion of the shaft within the housing.

Abstract: A surgical instrument includes a housing and a trigger assembly. The trigger assembly includes a trigger including a drive portion and a manipulation portion, a rocker, a linkage, and a slider. The trigger is pivotably coupled to the housing such that the drive and manipulation portions are moved in different directions in response to actuation of the trigger. The drive portion of the trigger is pivotably coupled to the rocker. The linkage is pivotably coupled to the rocker and the housing at opposing end portions thereof. The slider is pivotably coupled to the rocker and operably coupled to the deployable component. Actuation of the manipulation portion of the trigger moves the drive portion of the trigger distally to thereby urge the rocker distally, pivot the linkage about the second end portion thereof, and slide the slider distally to deploy the deployable component distally.

Abstract: A surgical instrument includes a housing, a shaft extending distally from the housing, an end effector assembly at a distal end portion of the shaft, and a drive assembly. The drive assembly includes a movable handle, a carriage operably coupled to the movable handle, an inner drive operably coupled to the end effector assembly, and a spring assembly operably coupling the carriage and the inner drive. The spring assembly includes inner and outer coil springs arranged in a nested configuration. Initial actuation of the movable handle slides the carriage such that the spring assembly transfers the sliding of the carriage into translation of the inner drive to apply a jaw force by the end effector assembly. Subsequent actuation of the movable handle slides the carriage to compress the spring assembly to substantially maintain a position of the inner drive, thereby controlling the jaw force.

Abstract: A surgical instrument includes a movable handle movable relative a housing to manipulate an end effector assembly, and a latch assembly. The latch assembly includes a latch arm including a latch post, and a latch track defining an entry path, a latching path, a saddle, an un-latching path, and a return path. The latch post moves through the entry path, the latching path, and into the saddle upon movement of the movable handle from an un-actuated position to an over-actuated position and back to an actuated position to lock the movable handle. The latch post moves from the saddle through the un-latching path and the return path upon movement of the movable handle from actuated position to the over-actuated position and back to the un-actuated position. The return path includes a ramped surface configured to inhibit reverse travel of the latch post into the return path.

Abstract: A surgical instrument includes a housing, a movable handle, a trigger, a drive assembly operably coupled between the movable handle and an end effector assembly such that movement of the movable handle from an initial position to a compressed position manipulates the end effector assembly, and a linkage operably coupled between the trigger and a knife such that movement of the trigger from an un-actuated position to an actuated position rotates the linkage to deploy the knife relative to the end effector assembly. A drive housing of the drive assembly inhibits rotation of the linkage when the movable handle is disposed in the initial position and the trigger is disposed in the un-actuated position. The drive housing cams along a surface of the linkage to urge the linkage to rotate when the movable handle is returned towards the initial position, thereby returning the trigger towards the un-actuated position.

Abstract: An endoscopic bipolar forceps includes a housing having a shaft extending therefrom including an end effector assembly disposed at a distal end thereof having jaw members. A movable handle is pivotable relative to the housing from an initial position wherein the jaw members are spaced relative to one another to a compressed position wherein the jaw members are closed about tissue. A trigger assembly is pivotably coupled to the movable handle and includes a trigger operably coupled to a knife assembly having a knife, a knife drive bar and a cam pin. The trigger includes an elongated slot defined therein configured to house the cam pin for translation therein. Upon actuation of the movable handle, the trigger moves in unison with the movable handle to the compressed position and the cam pin rides within the elongated slot maintaining consistent angle between the movable handle and the trigger during movement thereof.

Abstract: A method of disassembling a surgical instrument for reprocessing, includes accessing an interior housing of a surgical instrument to expose a slider assembly, an elongated outer shaft including a drive plate and knife assembly extending therethrough, and a torsion spring of the surgical instrument. The method further includes grasping an upper leg of the torsion spring to disengage the upper leg from a slot defined within the drive plate, disengaging the drive plate from the slider assembly, and removing the torsion spring from the slider assembly.

Abstract: A method of disassembling a surgical instrument for reprocessing, includes accessing an interior housing of a surgical instrument to expose a slider assembly, an elongated outer shaft including a drive plate and knife assembly extending therethrough, and a torsion spring of the surgical instrument. The method further includes grasping an upper leg of the torsion spring to disengage the upper leg from a slot defined within the drive plate, disengaging the drive plate from the slider assembly, and removing the torsion spring from the slider assembly.

Abstract: A surgical instrument includes a housing, a shaft extending distally from the housing, an end effector assembly disposed at a distal end of the shaft, a knife slidably disposed within the shaft, a movable handle operably coupled to the housing, a trigger operably coupled to the housing, a drive assembly operably coupled between the movable handle and the end effector assembly such that movement of the movable handle manipulates the end effector assembly, and a linkage operably coupled between the trigger and the knife such that movement of the trigger deploys the knife. In an initial position of the movable handle, a portion of a drive housing of the drive assembly intersects a path of movement of the linkage to inhibit movement of the linkage, thereby inhibiting actuation of the trigger.

Abstract: A surgical instrument includes a housing having a movable handle operably coupled to the housing and movable relative thereto between an initial position and a compressed position. A trigger is operably coupled to the housing within a slot defined therein and movable relative to the housing and the movable handle between an un-actuated position and an actuated position. A flange is disposed on the trigger and configured to extend distally therefrom. The flange is dimensioned to cover the slot when the trigger is moved between the un-actuated and actuated positions to avoid creating a potential pinch point between the trigger and the slot.

Abstract: A surgical instrument includes a housing, a shaft extending distally from the housing, an end effector assembly disposed at a distal end of the shaft, a knife slidably disposed within the shaft, a movable handle operably coupled to the housing, a trigger operably coupled to the housing, a drive assembly operably coupled between the movable handle and the end effector assembly such that movement of the movable handle manipulates the end effector assembly, and a linkage operably coupled between the trigger and the knife such that movement of the trigger deploys the knife. In an initial position of the movable handle, a portion of a drive housing of the drive assembly intersects a path of movement of the linkage to inhibit movement of the linkage, thereby inhibiting actuation of the trigger.

Abstract: A surgical instrument includes a housing having a rounded barrel with a distal end and proximal end configured to seat within a palm of a user. A shaft extends from the distal end of the barrel and supports an end effector at a distal end thereof including first and second jaw members. A rotating assembly is disposed on the barrel and is actuatable to rotate the jaw members. A jaw actuation assembly is disposed on the barrel and is actuatable to move the jaw members between open and closed positions. An energy activation assembly is disposed on the barrel and is actuatable to supply electrosurgical energy to the jaw members. A knife actuation assembly is disposed on the barrel and is actuatable to cut tissue disposed between the jaw members.

Abstract: A cleaning fixture for a surgical instrument includes a handle receiving portion configured to receive a housing of a surgical instrument, a shaft receiving portion configured to receive a shaft and an end effector assembly of the surgical instrument, and a knife actuation assembly movably coupled to the handle receiving portion or the shaft receiving portion. The shaft receiving portion extends distally of the handle receiving portion. The knife actuation assembly is configured to selectively actuate a knife trigger assembly of the surgical instrument to advance a knife of the surgical instrument between jaw members of the end effector assembly thereof.

Abstract: Methods and devices are described for the design and manufacturing of a knife with a robust double bevel cutting edge profile for use in surgical procedures. The double bevel cutting edge profile may be defined by a combination of a cutting edge angle and a radius of the cutting edge tip. In some embodiments, the cutting edge profile may be defined by a combination of a web thickness profile and a radius of the cutting edge tip. Numerical ranges are identified for each of the various geometric parameters which may define a cutting edge that provides sufficient knife sharpness over many cutting repetitions. In some embodiments a medical device, which implements a knife with a cutting edge, for use in surgical procedures is described.

Abstract: A surgical instrument includes a housing having a barrel with distal and proximal end portions. The barrel includes a handle depending from a lower end thereof and a concave portion defined within and extending along an upper surface thereof from the proximal end portion of the barrel to the distal end portion of the barrel. A shaft extends from the distal end portion of the housing and supports an end effector assembly at a distal end thereof configured to treat tissue. The concave portion is configured to enhance visibility of the end effector assembly during tissue treatment.