Casualty Warming Device

What Is It?

The Casualty Warming Device (CWD) is a Class 1 Food and Drug Administration device designed for the prevention of hypothermia in susceptible trauma victims. The lightweight, compact, low-cost, disposable and shelf-stable warming device allows for easy removal and relocation on the body to permit access to wounds.

How Does It Work?

The CWD is an air-activated chemistry-based approach that requires no external power. A unique dual-layer technology makes self-regulation possible, allowing for safe, unattended operation and a stable temperature profile for up to eight hours. Parts for the modular device can be removed as needed for access to wounds.

What Will It Accomplish?

In clinical trials against similar commercial off-the-shelf devices, the CWD successfully demonstrated the ability to maintain patient skin interface temperature of 40 degrees Celsius (104 degrees Fahrenheit) for eight hours, greatly surpassing the stability of other devices.

The Casualty Warming Device (CWD) is a Future Naval Capability product designed to prevent hypothermia among battlefield trauma victims.The consequences of hypothermia for trauma victims is severe and the technical requirements of providing safe warming therapy in the field are challenging, particularly during air transport where an aircraft’s ambient temperature can drop dramatically.

Hypothermia can induce wound infection, hemodynamic stress, cardiac disturbance, coagulopathy, and prolonged and altered drug response. It can increase shivering, pain and thermal discomfort, and the risk of mortality. Personnel injured in the field or in extreme environments may be particularly susceptible because the time between injury and definitive treatment is typically longer than in noncombat situations. The resulting exposure makes hypothermia more likely to occur. 

The Office of Naval Research, as part of its Future Naval Capability program, supported the development of the CWD to keep injured warfighters and personnel warm during evacuation and transport to a medical treatment facility.

The Marine Corps System Command (MCSC) Family of Field Medical Equipment (FFME) Advanced Development and Testing Program received the CWD for operational evaluation testing early in 2010. Completion of testing will finalize the intent to purchase by MCSC/FFME and the Naval Expeditionary Combat Command.

Research Challenges and Opportunities:

  • Develop a system that is biodegradeable
  • Develop a system that is thinner, foldable or that occupies less volume when carried
  • Develop a system that also acts as an antiseptic cleanser

Point of Contact:

Michael Given
(703) 696-4055
michael.given@navy.mil

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