What is the significance of nitrogen in repetitious dives?

The significance of nitrogen in repetitious dives primarily relates to its potential to lead to decompression sickness. When divers descend, nitrogen from the air we breathe dissolves into body tissues under increased pressure. During repetitious dives, especially with insufficient surface intervals, this nitrogen continues to accumulate in the body.

As the diver ascends to shallower depths, the pressure decreases, causing the dissolved nitrogen to come out of solution. If this release occurs too quickly, it can form bubbles in tissues and blood, leading to decompression sickness, commonly referred to as "the bends." This condition can result in severe pain and other serious health issues.

To prevent decompression sickness, divers must adhere to recommended ascent rates and make appropriate safety stops to allow nitrogen to safely dissipate from their bodies, further emphasizing the importance of understanding how nitrogen behaves during repetitious diving.