Stress Slows Down Wound Healing in Diabetic Foot Ulcers: Study @BCM @UofAZResearch

Results of a recent study conducted by a combined team from Baylor College of Medicine, the University of Arizona’s Southern Arizona Limb Salvage Alliance (SALSA) along with Qatar’s Hamad Medical Center suggests that rate of healing is poorly impacted by physiological stress. The novel study, which used advanced wearable technologies may soon lead to mobile applications that can promote simple relaxation techniques, measure their outcome and perhaps speed healing.

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Does Physiological Stress Slowdown Wound Healing in Patients With Diabetes?

Javad Razjouyan, PhD, MSc, Gurtej Singh Grewal, PhD, Talal K. Talal, MD, David G. Armstrong, DPM, MD, PhD, Joseph L. Mills, MD, Bijan Najafi, PhD, MSc
First Published April 24, 2017

Abstract
Background:
Poor healing is an important contributing factor to amputation among patients with diabetic foot ulcers (DFUs). Physiological stress may slow wound healing and increase susceptibility to infection.

Objectives:
The objective was to examine the association between heart rate variability (HRV) as an indicator of physiological stress response and healing speed (HealSpeed) among outpatients with active DFUs.

Design and Methods:
Ambulatory patients with diabetes with DFUs (n = 25, age: 59.3 ± 8.3 years) were recruited. HRV during pre–wound dressing was measured using a wearable sensor attached to participants’ chest. HRVs were quantified in both time and frequency domains to assess physiological stress response and vagal tone (relaxation). Change in wound size between two consecutive visits was used to estimate HealSpeed. Participants were then categorized into slow healing and fast healing groups. Between the two groups, comparisons were performed for demographic, clinical, and HRV derived parameters. Associations between different descriptors of HRV and HealSpeed were also assessed.

Results:
HealSpeed was significantly correlated with both vagal tone (r = –.705, P = .001) and stress response (r = .713, P = .001) extracted from frequency domain. No between-group differences were observed except those from HRV-derived parameters. Models based on HRVs were the highest predictors of slow/fast HealSpeed (AUC > 0.90), while models based on demographic and clinical information had poor classification performance (AUC = 0.44).

Conclusion:
This study confirms an association between stress/vagal tone and wound healing in patients with DFUs. In particular, it highlights the importance of vagal tone (relaxation) in expediting wound healing. It also demonstrates the feasibility of assessing physiological stress responses using wearable technology in outpatient clinic during routine clinic visits.

Source: Diabetes Science and Technology

David G. Armstrong

Dedicated to amputation prevention, wound healing, diabetic foot, biotechnology and the intersection between medical devices and consumer electronics.

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