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The effect of chair designs on sitting pressure distribution and tissue perfusion.
MedLine Citation:
PMID:  23397814     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
OBJECTIVE: The aim of this study was to investigate the effect of five chair designs on interface pressure distribution and tissue perfusion in the buttock-thigh region.
BACKGROUND: Prolonged sitting has been found to contribute to the symptoms of work-related low back pain. Studies have found that chair design affects users' sitting posture and comfort. As sitting applies pressure to the user, it is necessary to investigate how chair design affects sitting pressure and tissue perfusion during sitting.
METHOD: We tested five chair designs (Suspension A, Suspension B, Foam A, Foam B, and bicompliant) on 15 young, healthy females. Sitting interface pressure and buttock-thigh tissue perfusion (in terms oftranscutaneous partial pressure of oxygen and carbon dioxide, tcPO2 and tcPCO2, respectively) were measured during 10-min sitting on each chair.
RESULTS: We found that chair design significantly affected the distribution of the sitting pressure (p < .001) and buttock-thigh tissue perfusion (p < .023). Average pressure and total contact area were found highest in both foam designs, and the average pressure was the lowest in one of the suspension designs. Across all tested chair designs, the anterior portion of the seat sustained the lowest contact pressure. It was also found that tcPO2 was the lowest (p < .003) and tcPCO2 was the highest (p < .001) in tissue around ischial tuberosity for all chair designs.
CONCLUSION: Chair design and materials of the seat significantly affect the sitting interface pressure distribution and tissue perfusion in sitting area. Further evaluation of these outcomes may provide useful information to correlate chair design with sitting comfort.
Authors:
Mohsen Makhsous; Fang Lin; David Hanawalt; Shannon Lynn Kruger; Angie LaMantia
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Human factors     Volume:  54     ISSN:  0018-7208     ISO Abbreviation:  Hum Factors     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2013-02-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374660     Medline TA:  Hum Factors     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1066-74     Citation Subset:  IM; S    
Affiliation:
Department of Physical Therapy and Human Movement Sciences, Chicago, IL 60611, USA. m-makhsous2@northwestern.edu
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