Int J Sports Med 1999; 20(8): 555-559
DOI: 10.1055/s-1999-8845
Training and Testing
Georg Thieme Verlag Stuttgart ·New York

Reproducibility of Resting Peripheral Blood Flow Using Strain Gauge Plethysmography

P. C. Fehling, P. J. Arciero, C. J. MacPherson, D. L. Smith
  • Department of Exercise Science and Dance, Skidmore College, Saratoga Springs, NY, USA
Further Information

Publication History

Publication Date:
31 December 1999 (online)

The purpose of this study was to examine the intra-tester and inter-tester reliability of strain gauge plethysmography (SGP) using the Hokanson EC-5R plethysmograph among three investigators. An arterial inflow test was performed by each of the investigators on fifteen college-aged volunteers at the forearm and calf sites. Intra-tester reliability was assessed by analyzing three serial measurements obtained at both sites. Inter-tester reliability was assessed in two ways: first, by having the three investigators obtain and analyze their own recordings, and, second, by having all three investigators (Testers 1, 2, and 3) analyze SGP recordings obtained by the most experienced investigator (Tester 1). The mean coefficient of variation (CV) for the intra-tester analysis was similar at the forearm (4.9 %) and calf (4.0 %) sites. The inter-tester analysis revealed that there were no significant differences among the three testers at either site when investigators obtained and analyzed their own waveforms. The CV calculated from the means of the three investigators was greater at the forearm site (10.7 %) than at the calf site (2.5 %). Similarly, when Testers 2 and 3 analyzed Tester 1's waveforms there were no significant differences found among testers at either site and the CV was less than when each investigator obtained his/her own waveforms. Strain gauge plethysmography blood flow measures obtained by experienced testers, under controlled laboratory conditions, are reproducible. The small variability in blood flow that exists is more attributable to variability in the acquisition of the waveforms than in the analysis of the waveforms.

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Ph.D. Patricia C. Fehling

Department of Exercise Science and Dance Skidmore College

North Broadway

Saratoga Springs, NY 12866

USA

Phone: +1 (518) 580-5376

Fax: +1 (518) 580-5396

Email: pfehling@skidmore.edu

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