Various examples are directed to systems and methods for operating a surgical instrument comprising a firing member translatable proximally and distally along a longitudinal axis between a stroke begin position to a stroke end position distal of the stroke begin position; a knife coupled to the firing member; and a motor coupled to the firing member to translate the firing member between the stroke begin position and the stroke end position. A control circuit may receive a firing signal and begin a firing member stroke by providing an initial motor setting to the motor. The control circuit may maintain the initial motor setting for an open-loop portion of the firing member stroke. The control circuit may receive firing member motion data describing a motion of the firing member during the open-loop portion of the firing member stroke and may select a firing control program based at least in part on the motion of the firing member during the open-loop portion of the firing member stroke.

The instant invention is directed to a universal bone screw screwdriver and in particular to a universal screwdriver that permits the removal of screws from bone plates that are manufactured by different manufacturers having distinct characteristics. The universal bone screw screwdriver is adapted to removably receive an elongated tool bit having a hollow center. The elongated tool bits correspond to the screw heads of different manufacturers and comprises a torque limiting and locking spring assembly to secure the elongated tool bit to the driver shaft and inhibit over-tightening of the bone screw into the bone or bone plate as the case may be.

A surgical system is disclosed including impedance sensors and a control circuit. The impedance sensors are configured to apply a therapeutic level of RF energy to tissue, sense a real time impedance of the tissue, sense a first tissue impedance based on an initial contact with the tissue, sense a second tissue impedance of the tissue without applying a therapeutic amount of RF energy to the tissue. The control circuit is configured to determine a control parameter of a motor based on the first tissue impedance and the second tissue impedance, determine a percentage of use of an end effector, detect a change of the real time impedance of the tissue, adjust the control parameter of the motor based on the change of the real time impedance and the percentage of use of the end effector, and control delivery of a therapeutic energy application to the tissue.

Provided is a medical handpiece having liquid spray and suction functions and capable of being replaced with a drill. The medical handpiece includes a handpiece body having an accommodation space therein, a spray unit receiving liquid from an outside to spray the liquid onto a target to be treated, a pump unit transmitting air pressure to the spray unit to increase a spray speed of liquid sprayed by the spray unit, a drive unit converting a rotary motion into a reciprocating motion to transmit power to the pump unit, and a suction unit sucking liquid and foreign matter from the target to be treated.

A shaft assembly for a surgical instrument that includes a movable drive member. In at least one form, the surgical instrument includes a spine assembly that is couplable to the surgical instrument and has a surgical end effector coupled thereto by an articulation joint. The shaft assembly in one form includes a proximal firing member and an intermediate firing member that is coupled to a distal firing member. The distal firing member is configured for selective travel through the surgical end effector. At least one articulation driver is coupled to the surgical end effector to apply articulation motions thereto. A clutch assembly interfaces with the primary and intermediate firing members and the articulation driver such that when in an articulation orientation, movement of the drive member results in movement of the articulation driver and when in a firing orientation, movement of the drive member results in movement of the intermediate and distal firing members. A separate articulation motor may be employed to actuate the articulation driver.

An adapter assembly is provided for selectively interconnecting a surgical end effector that is configured to perform a function and a surgical device that is configured to actuate the end effector, the end effector including at least one axially translatable drive member, and the surgical device including at least one rotatable drive shaft. The adapter assembly includes at least one drive converter assembly including a drive shaft; a drive coupling nut threadably connected to a distal end portion of the drive shaft; and an axially translatable drive bar connected to the drive coupling nut, wherein rotation of the drive shaft results in axial translation of the drive bar. The drive coupling nut engages 29 teeth of the threaded distal end portion of the drive shaft. The drive coupling nut is manufactured from unreinforced PEEK thermoplastic polymer.

A treatment system can include a treatment instrument with an operation input element that has a magnet; and a sensor that detects a parameter that changes with a movement of the magnet together with the operation input element based on an operation of the operation input element. The treatment system can also include a control apparatus that can control the supply of electrical energy to the treatment instrument for operation of the treatment instrument. The control apparatus includes a processor that can determine a relationship between a change in a distance between the sensor and the magnet and a change in the parameter, and to set, based on the relationship, a threshold for switching between an ON state and an OFF state of the supply of the electrical energy to the treatment instrument.

An ultrasonic device may include an electromechanical ultrasonic system that includes an ultrasonic transducer coupled to an ultrasonic blade. A method of delivering energy to the ultrasonic device may include sensing a vessel type in contact with the blade, determining that the vessel type is either a vein or an artery, and delivering power to the transducer based on the vessel type. Power may be applied to the transducer at a power level P that differs from a nominal power level Pn for a period T that differs from a nominal period Tn based on the vessel. The power level P may be lower than Pn for a period T that is longer than Tn when the vessel is a vein. Alternatively, the power level P my be greater than Pn for a period T that is shorter than Tn when the vessel is an artery.

A surgical instrument insertable through a trocar comprising a shaft including a frame, an end effector, and an articulation joint, wherein the end effector is rotatable about the articulation joint. The shaft further comprises an outer housing slidable relative to the shaft frame including a distal non-round housing portion adjacent the articulation joint and a longitudinal round housing portion extending proximally from the distal housing portion, wherein the longitudinal round housing portion comprises a first diameter, and wherein the distal housing portion comprises a second diameter which is less than the first diameter. The surgical instrument further comprises an articulation lock configured to prevent the rotation of the end effector, wherein the articulation lock is positioned within the distal non-round housing portion.

Disclosed is an instrument assembly for performing a procedure. The instrument assembly may include a powered motor for moving, such as rotating, a tool tip. The instrument assembly may include a transmission or a gear assembly to provide varying speed and/or torque to the tool tip.