A Proof-of-Concept for a Continuous-Temperature Circulating Water Bath in Frostbite Limb Rewarming.

Area of Science:

• Medical Devices
• Thermal Injury Management
• Biomedical Engineering

Background:

• Frostbite is a serious thermal tissue injury from cold exposure, potentially leading to amputation.
• Current American Burn Association rewarming guidelines (38-42°C water) are inconsistently applied in clinical practice.
• Lack of consistent temperature control hinders effective frostbite treatment and rewarming compliance.

Purpose of the Study:

• To develop and evaluate a continuous-temperature circulating water bath for frostbite treatment.
• To demonstrate a proof-of-concept for a standardized and reliable rewarming method.
• To reduce the need for continuous manual monitoring during frostbite rewarming.

Main Methods:

• Construction of a circulating water bath system utilizing a reservoir and an Anova Precision Cooker NANO.
• Immersion of chilled pig feet in 39.0°C water, with and without the device, for 30 minutes.
• Measurement of tissue temperature changes and final water temperature to assess rewarming efficacy.

Main Results:

• Tissue rewarming without the device reached 34.2°C (water temp: 36.5°C).
• Tissue rewarming with the device reached 36.7°C (water temp: 39.1°C) within 30 minutes.
• The device maintained consistent water temperature, facilitating effective tissue rewarming.

Conclusions:

• The continuous-temperature circulating water bath provides a standardized, reliable, and effective method for rewarming hypothermic tissue.
• This system addresses inconsistencies in current frostbite treatment protocols.
• Further clinical validation is underway to confirm the feasibility of this improved frostbite rewarming approach.