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Pulse Wave Velocity Testing in the Baltimore Longitudinal Study of Aging
Published on: February 7, 2014
Comparison of automated and manual F-wave latency measurements
1Department of Neurology, Stritch School of Medicine, Hines VAH and Loyola University Chicago, Neurology (127), Hines, IL 60141, USA. morris.fisher@med.va.gov
Objective:
F-waves are well-established clinical neurophysiological studies. F-wave analysis is now cumbersome limiting the usefulness of F-waves. This study evaluates the accuracy and reliability of an automated analysis method for F-wave latencies.
Methods:
F-waves following 20 supramaximal stimuli recorded from the extensor digitorum brevis muscle of 80 limbs (55 subjects) were analyzed. F-wave latencies were determined using a computer program developed by NEUROMetrix (Waltham, MA). These results were compared in a blinded fashion with manual measurements of the same datasets by a clinical neurophysiologist with established expertise in F-waves. The manual measurements were repeated once.
Results:
The yield rate of automated median F-wave latencies was 100% with a correlation coefficient (CC) of 0.996 when compared with manual assignment results. For individual F-wave latency measurements, comparable values were 90% and 0.977, respectively. The repeated manual measurements revealed a yield rate and CC for median latencies of 100% and 0.998, respectively, with comparable values for individual latency measurements of 95% and 0.992.
Conclusions:
These results indicate the feasibility of a reliable computerized automated analysis of F-wave latencies.
Significance:
A reliable automated analysis of F-waves should add meaningfully to the value of these responses in clinical neurophysiology.
