Under what circumstances should TT6A be employed?

TT6A, or Treatment Table 6A, is specifically designed for treating severe decompression sickness (DCS) symptoms especially when they have stabilized but have not improved within a certain timeframe. In this case, employing TT6A after 10 minutes of stable severe symptoms at a depth of 60 feet of seawater (fsw) is crucial because it allows for a focused approach to possibly life-threatening situations. The treatment aims to increase the pressure surrounding the patient, ensuring that nitrogen bubbles are compressed, which can lead to symptom relief and a better outcome.

In the context of the other circumstances listed, treating mild decompression symptoms or symptoms that worsen at shallower depths would not warrant the use of TT6A, as they do not involve the levels of severity that this table addresses. Additionally, employing the treatment when patients show improvement is unnecessary because TT6A is intended for cases where symptoms are persistent and severe, indicating that the patient requires urgent and advanced treatment to mitigate further risks.