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Laboratory Research
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Investigation of interface pressure changes on an air fluidized support surface Rosalyn Jordan, RN, BSN, CWOCN, Huntleigh Healthcare LLC Purpose: .Technical measurements were completed to analysis an air fluidized support surface system to draw some conclusions if this therapy displayed a variation of tissue interface pressure measurement over time or if the tissue interface pressure measurements remained the same. Methodology: .Tissue interface pressures were measured using a pressure mapping system. After careful calibration, a 59 kg (130 lb) male was place on an air fluidized system for 10 minutes. Pressure map recordings were taken once per second and then plotted once per minute for a long term view and once per second for a short term view. Pressure over time was analyzed on both right and left heels and the sacrum for 10 minutes. Pressure was then analyzed on the same sites using a pneumatic pressure sensor for further verification and replication. Results: .There was no evidence of cyclic interface pressure variation over a 10 minute period or the 10 second time period either. Also, interface pressure remained at broadly constant levels throughout the tests, even though two different interface pressure sensors were utilized for this project. Conclusion: .The results of the findings will be presented graphically during the presentation and related to the new terms and definitions proposed by the NPUAP Support Surface Standards Initiative. Allen V, Ryan DW, Murray A. Repeatability of subject/bed interface pressure measurements. J Biomed Eng. 1993;15(4):329Ð 332 Allen V, Ryan DW, Lomax N, Murray A. Accuracy of interface pressure measurement systems. J Biomed Eng. 1993;15(4):344Ð348 Barnett RI, Shelton FE. Measurement of support surface efficacy: pressure. Adv Wound Care. 1997;10(7):21Ð 29 Bethaves T. Interface pressure measurement: testing and selecting sensors. J Wound Care. 2002;11(9):325Ð 329 Brienza DM, Geyer MJ. Understanding support surfaces technologies. Adv Skin Wound Care. 2000;13(5):237Ð 244 Cullum N, Deeks J, Shelton TA, Song F, Fletcher AW. Beds, Mattresses and Cushions for Pressure Sore Prevention and Treatment. Cochrane Review 2001. In: The Cochrane Library, 3 Devine B. Alternating pressure air mattesses in the management of established pressure sores. J Tissue Viability. 1995;5(3):94Ð98 Knox DM, Anderson TM, Anderson PS. Effects of different turn intervals on skin of healthy older adults. Adv Wound Care. 1994;7(1):48Ð 56 Maklebust J. An update on horizontal patient support surfaces. Ostomy Wound Manage. 1999;45(1A suppl):70SÐ 77S Patterson RP, Fisher SV. The accuracy of electrical transducers for the measurement of pressure applied to the skin. IEEE Transactions on Biomedical Engineering. BME 1979;26(8):450Ð 456. |
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