What is the minimum oxygen saturation that should be maintained for a casualty with a TBI?

Maintaining a minimum oxygen saturation of greater than 90% for a casualty with a traumatic brain injury (TBI) is crucial because adequate oxygen delivery to the brain is essential for preventing secondary injury and ensuring proper brain function. A saturation level below this threshold can indicate inadequate oxygenation, which can exacerbate neurological damage and lead to poorer outcomes.

In cases of TBI, the brain is particularly vulnerable to hypoxia, which can worsen the injury and impair recovery. A saturation level of greater than 90% helps ensure that the brain receives sufficient oxygen to function, supports cellular metabolism, and minimizes the risk of further injury or complications.

Higher saturation targets, while potentially beneficial, may not be necessary in all situations. Levels greater than 95% or 98% can be desirable, but maintaining above 90% is the standard minimum threshold to protect the brain and is a recognized guideline in tactical combat casualty care for managing TBIs. This standard allows for a balance between ensuring adequate oxygenation without over-treating, which could lead to other complications, such as oxygen toxicity in certain situations.