Decompression sickness and tunnel workers

Underwater construction and tunnel operations use compressed air to stabilize soil and keep out water. In these conditions, workers are at risk of decompression sickness (DCS). DCS can be treated or prevented using a decompression chamber guided by decompression tables. The tables direct the time and pressure intervals needed to ensure workers are brought back to surface pressure safely. This webpage provides information about decompression sickness and the NIOSH decompression tables. These tables are accessible for use by workers, employers, and safety and health professionals.

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