A notification system for receiving a request for a remote status update from a remote device is disclosed. The outer valve seating defines first and second seats for the outer valve needle, wherein co-operation between the outer valve needle and the first seat controls fuel flow between a first delivery chamber and the first nozzle outlet and co-operation between the outer valve needle and the second seat controls fuel flow between a second delivery chamber and the first nozzle outlet. The device detects patterns of electrical impulses sent from the brain to an impaired muscle and measures the strength of the impulses against a threshold value. Still another method of the present invention may be employed to crosslink biomolecules comprising unsubstituted amide moieties immobilized on medical device surfaces. When the external tool is connected, the inhibition state is released. A shroud is configured to partially encircle the drum, and rotatable interior rollers are circumferentially spaced around the interior of the shroud.