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Comparison of skin perfusion response with alternating and constant pressures in people with spinal cord injury

Jan, YK and Brienza, DM and Boninger, ML and Brenes, G (2011) Comparison of skin perfusion response with alternating and constant pressures in people with spinal cord injury. Spinal Cord, 49 (1). 136 - 141. ISSN 1362-4393

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Study design: Two-way factorial mixed design, the between-subjects factor as the spinal cord injury (SCI) status (SCI and non-SCI) and the within-subjects factor as the pressure pattern (alternating and constant pressures).Objectives: To compare the effects of alternating and constant pressures on weight-bearing tissue perfusion in people with SCI, with application for improving alternating pressure support surface usage.Setting: University research laboratory.Subjects: A total of 28 participants were studied, 7 participants with cervical injury, 7 participants with injury below T6 and 14 healthy controls.Methods: Sacral skin perfusion was continuously measured using laser Doppler flowmetry under 10 min preloading, 20 min loading (alternating or constant pressures) and 10 min postloading. Alternating pressure was applied with low-interface pressure at 0 mm Hg and high-interface pressure at 60 mm Hg with a cycle time of 5 min; constant pressure was applied with interface pressure at 30 mm Hg.Results: The results showed that pressure pattern affects skin perfusion responses in weight-bearing tissues (P<0.01). Alternating pressure stimulates an increase in skin perfusion (1.210.08 au) as compared with constant pressure (0.740.07 au) in people with SCI (P<0.01). There was no overall difference in the skin perfusion responses of patients with SCI as compared with non-SCI patients (P<0.05).Conclusion: This study has shown that alternating pressure enhances the skin perfusion of weight-bearing tissues as compared with constant pressure in people with SCI. The protocol tested in this study may be used to guide the selection of parameters of commercial alternating pressure support surfaces for preventing pressure ulcers in people with SCI. © 2011 International Spinal Cord Society All rights reserved.


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Item Type: Article
Status: Published
CreatorsEmailPitt UsernameORCID
Jan, YK
Boninger, MLboninger@pitt.eduBONINGER
Brenes, G
Centers: Other Centers, Institutes, Offices, or Units > Human Engineering Research Laboratories
Date: 1 January 2011
Date Type: Publication
Journal or Publication Title: Spinal Cord
Volume: 49
Number: 1
Page Range: 136 - 141
DOI or Unique Handle: 10.1038/sc.2010.58
Schools and Programs: School of Health and Rehabilitation Sciences > Rehabilitation Science and Technology
Refereed: Yes
ISSN: 1362-4393
MeSH Headings: Adult; Female; Humans; Male; Middle Aged; Pressure--adverse effects; Pressure Ulcer--etiology; Pressure Ulcer--physiopathology; Pressure Ulcer--prevention & control; Regional Blood Flow--physiology; Skin--blood supply; Skin Physiological Processes; Spinal Cord Injuries--complications
PubMed ID: 20514054
Date Deposited: 03 Oct 2012 21:41
Last Modified: 05 Feb 2019 03:55


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