Tissue ischemia and hyperbaric oxygen treatment: an experimental study.

Area of Science:

• Biomedical Engineering
• Physiology
• Cellular Biology

Background:

• Post-burn edema and post-ischemic skeletal muscle edema are significant clinical challenges.
• Hyperbaric oxygen (HBO) therapy is a potential treatment modality for various conditions.
• Understanding HBO's effects on edema and cellular energy metabolism is crucial.

Purpose of the Study:

• To investigate the efficacy of HBO treatment in reducing edema in scald burn and post-ischemic skeletal muscle models.
• To evaluate the impact of HBO on high-energy phosphate compounds and muscle cell damage markers in post-ischemic skeletal muscle.

Main Methods:

• Utilized a scald burn mouse model to assess edema reduction with HBO.
• Employed a tourniquet ischemia model in skeletal muscle to induce edema and energy depletion.
• Measured tissue water content, high-energy phosphate levels (ATP, PCr), lactate, and phosphorylase activity.

Main Results:

• HBO treatment significantly reduced general post-burn edema in a scald burn model.
• In post-ischemic skeletal muscle, HBO therapy decreased edema, with effects persisting post-treatment.
• HBO treatment restored depleted high-energy phosphate stores (ATP, PCr), reduced lactate, and prevented a rise in phosphorylase activity, a marker of muscle damage.

Conclusions:

• HBO therapy demonstrates significant efficacy in mitigating edema associated with burns and ischemia.
• HBO treatment positively influences cellular energy metabolism and protects skeletal muscle from ischemic damage.
• These findings suggest HBO as a promising therapeutic strategy for managing edema and improving outcomes in ischemic conditions.