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Special Section Technical Briefs

Assessment of Reactive Hyperemia Using Peripheral Arterial Tonometry1

[+] Author and Article Information
Ashish Singal

Department of Cardiovascular Medicine,
University of Minnesota,
Minneapolis, MN 55455;
Department of Biomedical Engineering,
University of Minnesota,
Minneapolis, MN 55455

Evan Johnson

Department of Biomedical Engineering,
University of Minnesota,
Minneapolis, MN 55455

Harrison Kelner, Peter Eckman

Department of Cardiovascular Medicine,
University of Minnesota,
Minneapolis, MN 55455

Accepted and presented at The Design of Medical Devices Conference (DMD2015), April 13-16, 2015, Minneapolis, MN, USA.

Manuscript received March 3, 2015; final manuscript received March 13, 2015; published online April 24, 2015. Editor: Arthur Erdman.

J. Med. Devices 9(2), 020902 (Jun 01, 2015) (3 pages) Paper No: MED-15-1037; doi: 10.1115/1.4030112 History: Received March 03, 2015; Revised March 13, 2015; Online April 24, 2015

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Copyright © 2015 by ASME
Topics: Signals , Blood flow
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Figures

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Fig. 1

System setup for recording PAT signals for assessment of RH

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Fig. 2

Representative example of PAT signal amplitude during pre-occlusion (5 min), occlusion (2 min), and postocclusion (5 min) phases

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Fig. 3

For the raw data shown in Fig. 2, the mean and standard deviation of the PAT signal amplitude were calculated and shown during the pre-occlusion, occlusion, and postocclusion phases

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Fig. 4

Mean and standard deviation of PAT signal amplitude in the initial pre-occlusion phase, occlusion phase, and each of the individual 5 min postocclusion phases

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Fig. 5

Percent change in PAT signal amplitude, compared to the pre-occlusion signal amplitude, for each of the 5 min postocclusion phases

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Fig. 6

Percent change in PAT signal amplitude at 1–4 min postocclusion analysis time. The x axis in each graph is the duration of occlusion/ischemia that induced RH. Results between 1 and 3 min were observed to be statistically significant (p < 0.05).

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