Distribution of internal pressure around bony prominences: implications to deep tissue injury and effectiveness of intermittent electrical stimulation

Annals of Biomedical Engineering
Leandro R SolisVivian K Mushahwar

Abstract

The overall goal of this project is to develop interventions for the prevention of deep tissue injury (DTI), a form of pressure ulcers that originates in deep tissue around bony prominences. The present study focused on: (1) obtaining detailed measures of the distribution of pressure experienced by tissue around the ischial tuberosities, and (2) investigating the effectiveness of intermittent electrical stimulation (IES), a novel strategy for the prevention of DTI, in alleviating pressure in regions at risk of breakdown due to sustained loading. The experiments were conducted in adult pigs. Five animals had intact spinal cords and healthy muscles and one had a spinal cord injury that led to substantial muscle atrophy at the time of the experiment. A force-controlled servomotor was used to load the region of the buttocks to levels corresponding to 25%, 50% or 75% of each animal's body weight. A pressure transducer embedded in a catheter was advanced into the tissue to measure pressure along a three dimensional grid around the ischial tuberosity of one hind leg. For all levels of external loading in intact animals, average peak internal pressure was 2.01 ± 0.08 times larger than the maximal interfacial pressure measured at the le...Continue Reading

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Citations

Mar 9, 2012·Annals of Biomedical Engineering·Leandro R SolisVivian K Mushahwar
Jul 30, 2014·Physical Medicine and Rehabilitation Clinics of North America·Chester H HoVivian K Mushahwar
Jan 1, 2014·Wound Repair and Regeneration : Official Publication of the Wound Healing Society [and] the European Tissue Repair Society·Lisa KawasakiK Ming Chan
Apr 3, 2014·IEEE Transactions on Medical Imaging·Kenton HamaluikMartin Ferguson-Pell
Jan 1, 2014·Journal of Rehabilitation Research and Development·Michael Wininger, Barbara Crane
May 6, 2016·American Journal of Physical Medicine & Rehabilitation·Christof A J SmitThomas W J Janssen

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