A plug system for a low profile hollow catheter or other guidewire or balloon catheter, which catheter has a distal portion and a proximal portion and at least one lumen in fluid communication therebetween. According to an example embodiment, packet-based data is arbitrated and output with verification data. Electromagnetic energy generated by an energy generation unit located outside the surgical instrument is received by a reception coil incorporated in the surgical instrument with the surgical instrument by induction from the energy generation unit.