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Microvascular changes in large flame burn wound in sheep.
Hiroyuki Sakurai1, Motohiro Nozaki, Lillian D Traber
1Department of Plastic and Reconstructive Surgery, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, 162-8666, Tokyo, Japan.
Burns : Journal of the International Society for Burn Injuries
|February 9, 2002
Summary
This study reveals that burned adipose tissue experiences altered blood flow, unlike the consistently reduced flow in skin layers, impacting burn wound healing. This biphasic change in adipose tissue blood flow is linked to edema formation post-resuscitation.
Area of Science:
- Burn research
- Wound healing physiology
- Tissue perfusion dynamics
Background:
- Early excisional therapy improves outcomes for severe burn patients.
- Understanding regional blood flow in burn wounds is crucial but understudied.
- Massive third-degree burns cause significant tissue damage and hemodynamic changes.
Purpose of the Study:
- To longitudinally assess regional blood flow in different layers of a burn wound.
- To investigate the relationship between blood flow alterations and fluid flux in burn tissues.
- To elucidate the biphasic changes in subburn adipose tissue perfusion.
Main Methods:
- Utilized a conscious ovine model with a 40% third-degree burn.
- Quantified regional blood flow in skin, panniculus carnosus, adipose tissue, and skeletal muscle using fluorescent microspheres.
- Monitored systemic hemodynamics and microvascular fluid flux in burned tissue.
Main Results:
- Subburn adipose tissue demonstrated a significant biphasic alteration in regional blood flow.
- The skin layer exhibited consistently decreased blood flow throughout the experimental period.
- Increased adipose tissue blood flow correlated with sustained fluid filtrate and edema formation.
Conclusions:
- Adipose tissue perfusion dynamics are complex and biphasic following severe burns.
- Sustained fluid filtrate in post-resuscitation contributes to adipose tissue edema.
- Findings highlight the critical role of adipose tissue in burn wound pathophysiology and fluid management.