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Pressure/Motion Feedback
to Protect Skin of Sensorimotor Impaired Elders
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Principal Investigators: Eric E. Sabelman, PhD and
Jonathan Katz, MD
Project Staff: S. Ward, RN; L. Goldschmidt, PhD;
Ruth Yap, MS; David L. Jaffe, MS; and James H. Anderson, JEM
Project Category: Spinal Cord Injury - 2001
Objective: We propose to test whether a wearable
motion analysis and pressure feedback system will help prevent skin breakdown
in typically elderly individuals with sensorimotor deficits such as spinal cord
injury (SCI), stroke, diabetic neuropathy, prolonged post-surgical
immobilization and extreme frailty, who are at risk for the deleterious effects
of skin breakdown (i.e. pressure sores).
Research Plan: Past Merit Review projects (E601)
have led to the creation of a computerized wearable motion analysis system
("WAMAS") with wide potential as a diagnostic and therapeutic device
in elder care. The new WAMAS is able to interact with wireless measurement
devices, allow individuals to self-monitor pressure changes, provide real-time
sensory feedback (visual, tactile, auditory) to the user when pressure limits
have been exceeded, communicate patient status to a remote clinician, and
recognize when it is unused or incorrectly used if the patient is not complying
with pressure-relief instructions.
Field testing is being done with subjects in three
categories having somewhat different skin care needs: (a) SCI patients referred
by VAPAHCS Spinal Cord Injury Center, (b) frail elderly nursing facility
residents (from VAPA Long-Term Care), and (c) peripheral neuropathy patients
(from VAPA Neurology Service). 12 patients in each of the three categories are
to be recruited.
Work Accomplished: We are assembling additional
sets of the 2nd-generation WAMAS (in addition to those resulting from
design/development project E2182DA). Wired and wireless pressure input modules
are being fabricated for sending either full-resolution data or only
threshold-crossing data to the WAMAS by RF link A stand-alone speech module has
been made which is reprogrammable in the field with 32 patient-specific voice
messages 4.8 seconds long. We have determined that sensors located in bed and
chair cushions yield sufficient data, so that sensors would not have to be
attached to the body of non-ambulatory patients. Activity-of-daily-living and
pressure relief motion data are being collected using the WAMAS; this has been
done for 8 SCI and 5 nursing home subjects to date. The next stage is to
establish safe motion/pressure limits, followed by testing to see if assumed
limits are exceeded in everyday life.
Funding Source: VA RR&D Merit Review
Funding Status: Approved
Reprinted from the 2001 Annual Report
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