What percentage of DCS symptoms typically appears within the first 24 hours?

Diving-related decompression sickness (DCS) is a condition that can occur when a diver ascends too quickly after spending time at depths where the pressure is much greater than at the surface. As a diver ascends, the reduced pressure allows gases dissolved in the body, primarily nitrogen, to come out of solution, which can lead to various symptoms.

The majority of DCS symptoms manifest quite rapidly after a dive, with most cases presenting within the first 24 hours. Specifically, research indicates that approximately 98% of DCS cases show symptoms during this critical time frame. This high percentage is significant as it underscores the importance of monitoring divers closely during the post-dive phase, especially within the first few hours after ascent.

Understanding this timeframe is crucial for divers and dive professionals, as early recognition and treatment can significantly improve outcomes for individuals experiencing DCS. This knowledge emphasizes the need for proper ascent rates and safety stops during diving operations to minimize the risk of DCS developing in the first place.