What is the recommended surface interval from 40FSW in the water to 50FSW in the chamber for surDO2?

The recommended surface interval from 40 feet of seawater (FSW) to 50 FSW in the chamber for a scenario involving the use of supplemental oxygen (surDO2) is typically set to 5 minutes. This interval is critical for allowing the body to metabolically adjust to the increased pressure and oxygen levels in the chamber while minimizing the risk of oxygen toxicity or other potential complications during decompression.

In hyperbaric medicine, time intervals are carefully calculated to ensure divers do not undergo rapid pressure changes that could lead to injuries such as decompression sickness or barotrauma. Maintaining a 5-minute surface interval creates a safe transition period, allowing the diver's body to acclimate to the shifting environment. Additionally, this period serves as a buffer for any residual nitrogen in the diver's body, especially when transitioning to higher pressure environments that involve higher oxygen levels. Proper management of these intervals is crucial for diver safety and effectiveness in treatment protocols.