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Updated: Jun 24, 2026
Demonstration of the Rat Ischemic Skin Wound Model
Published on: April 1, 2015
Simulating High-Altitude Hypoxic Conditions Delays Wound Healing In Rats
Siyuan Cai1, Guang Yao2, Liheng Lin3
1Department of Plastic and Cosmetic Surgery, Xinqiao Hospital, Army Medical University; School of Materials and Energy, University of Electronic Science and Technology of China; State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China; Department of Plastic Surgery, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China.
Abstract:
High-altitude hypobaric conditions may cause prolonged wound hypoxia and impaired healing, yet standardized models remain scarce. In this study, we developed a wound delayed healing model and preliminarily validated it by simulating high-altitude hypoxia using a controlled hypobaric system. Rats were housed at simulated altitudes of 3000 m (air pressure: 70.1 kPa, partial oxygen pressure: 14.7 kPa) to 8000 m (air pressure: 35.6 kPa, partial oxygen pressure: 7.5 kPa) to determine safety thresholds, with oxidative stress and skin hypoxia assessed. Results showed increased mortality risk at simulated 6000 m altitude, with tolerance observed below 5000 m. Elevated altitudes were associated with worsening oxidative stress and increased skin hypoxia; exhibited altitude-dependent delays in wound healing, reduced perfusion, suppressed collagen remodeling, and exacerbated inflammatory responses. Despite upregulation of vascular regenerative factors, microvascular density decreased. Overall, this study developed and preliminarily validated a rat model suitable for investigating mechanisms and interventions in high-altitude hypoxia-induced chronic wounds.
