[Development of decompression regimens for excursion dives after a prolonged exposure to 21 ata]

Area of Science:

• Diving Medicine
• Hyperbaric Physiology
• Physiological Responses to Pressure

Background:

• Decompression sickness (DCS) is a risk in scuba diving.
• Optimizing decompression profiles is crucial for diver safety.
• Previous decompression models may not adequately address complex dive profiles.

Purpose of the Study:

• To develop and evaluate novel decompression regimens for simulated excursion dives.
• To assess the efficacy of new decompression strategies in preventing DCS.
• To compare the safety of tested regimens against field study outcomes.

Main Methods:

• Development of decompression schedules for simulated dives from 20, 50, 100, and 200 meters.
• Testing regimens in a dry altitude chamber simulating 2-week dive exposures.
• Subjects performed 10 excursion dives to a shallower depth during each test period.
• Comparison of chamber study results with a concurrent field study.

Main Results:

• Zero cases of decompression sickness (DCS) were recorded in 246 simulated man-excursions.
• Two cases of DCS occurred in a separate, concurrent field study.
• The developed decompression regimens demonstrated a high safety profile in a controlled environment.

Conclusions:

• The tested decompression regimens are effective in preventing DCS during simulated excursion dives.
• Controlled chamber testing provides a reliable method for validating decompression strategies.
• These findings suggest improved safety protocols for deep diving excursions.