Power assist device for a surgical instrument

A surgical instrument including an electrical assist device and its method of use for deploying surgical fasteners is described. The surgical instrument may include a handle, an elongated shaft extending from the handle, and a surgical clip deployment system including a drive shaft. The drive shaft is operable between at least a first proximal position and a second distal position. A firing pin is movable with respect to the drive shaft and an impact surface is associated with the drive shaft. The impact surface is constructed and arranged to be struck by the firing pin to displace the drive shaft to the second distal position and deploy the surgical fastener.</p> <p>(Automatic translation with Google Translate, no legal value)