The severity of carpal tunnel syndrome (CTS) may be categorised in a number of ways and utilising one of a range of presently available grading tools. The grading systems proposed by Bland and Padua, et al. are most commonly used. However, both are not without limitations, which are discussed comprehensively in this paper. The aim of this research is to establish, using best available evidence, a clinically appropriate revision of the current CTS nerve conduction grading tool and to evaluate its...