Autor: S Qadir, Cephas P. Swamidoss, Arne O. Budde, Maximilian W. B. Hartmannsgruber, David G. Silverman, S. J. Brull
Rok vydání: 1999
Předmět:
Zdroj: Journal of Clinical Monitoring and Computing. 15:455-459
ISSN: 1387-1307
DOI: 10.1023/a:1009961222017
Popis: Objective.The Verbal Numerical Scale (VNS) for rating pain isbounded between 0 (= no pain) and 10 (= worst pain imaginable). Wehypothesized that the limitations inherent to this boundary when ratingextremely painful stimuli may be identified by integrating the VNS with anunbounded score such as magnitude estimation of relative change. Methods.Volunteers received stimuli of increasing current via cutaneous electrodesuntil they rated > 5 on the VNS scale. This stimulus, termed S, wasarbitrarily assigned a magnitude estimate of 100%. Then, stimuli of varyingcurrents were delivered; two were 10 mA and 20 mA higher than S(S+10 and S+20), two were 1/2 of the current for the Sstimulus (S1/2), and one was at the original current(Srepeat). The pain elicited by each stimulus was scored inproportion to the S stimulus. The extrapolated VNS score (VNSext)was determined by multiplying this magnitude estimate (%) by the VNS score forS. Main Results.Seventy percent of the stimuli with higher intensitythan S generated a VNSext score above 10. The mean magnitudeestimations for S+10 and S+20 were 186% and 242%: theygenerated mean (median) VNSext values of 12.4 [12] and16.2 [14], respectively (p = 0.019 for the differencebetween them by Wilcoxon signed rank test). Conclusions.The combineduse of VNS and magnitude estimation confirmed that the ceiling of the boundedpain scale may significantly limit a patient's ability to describe a newpain stimulus. VNSext may provide a means of overcoming thislimitation.
Databáze: OpenAIRE
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