The present disclosure relates to an apparatus and method for preventing reuse of a surgical instrument. The EHE system uses multiple parameters, such as engine load, gear, number of cylinders operating, and transmission ratio, to determine EHE gains to determine EHE gain. These comprise a lower base layer and an upper layer, a cavity layer. The emitters and bases corresponding to the different EB junctions are provided during a chain implant. In preferred embodiments the inner layer extrudate and the outer layer extrudate are joined to the preencapsulated core extrudate before, or alternatively while, the preencapsulated core extrudate is fed through the coextrusion die. The compact system may be made portable and may further include an on-board spectrometer with or without a display unit.