Abstract: A surgical device includes a power source, a motor coupled to the power source, and a transmission assembly movable by the motor. The device also includes a reload coupled to the transmission assembly. The reload includes a plurality of staples ejectable by the transmission assembly. The device further includes a distance sensor configured to monitor operation of the transmission assembly and output distance data. The device additionally includes a controller configured to operate the motor to move the transmission assembly proximally from a distal position until a hard stop is reached, and determine whether the plurality of staples have been previously ejected based on the distance data.

Abstract: In certain embodiments, an intrusion detection device includes a magnetic field activated sensor and a cascading circuit. The magnetic field activated sensor is operable to detect movement of a corresponding component by sensing a magnetic flux variation of a magnetic device coupled to the component and generate a signal indicating that the corresponding component has moved. The cascading circuit is coupled to the magnetic field activated sensor and is operable to receive the signal generated by the magnetic field activated sensor and to generate a tamper detection signal if the signal indicating that the corresponding component has moved is received or if another tamper detection signal generated by another intrusion detection device is received.