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Decompression illness in goats following simulated submarine escape: 1993-2006
Summary
Submarine escape safety was improved by studying decompression illness (DCI) in goats. Escape following saturation diving posed a higher DCI risk than independent saturation or escape exposures alone.
Area of Science:
- Hyperbaric and Diving Medicine
- Submarine Escape Physiology
- Animal Models in Biomedical Research
Background:
- Understanding the risks associated with distressed submarine (DISSUB) escape is critical for naval safety.
- Previous assessments lacked comprehensive data on the relationship between DISSUB internal pressure, escape depth, and decompression illness (DCI).
Purpose of the Study:
- To define the relationship between DISSUB internal pressure, escape depth, and the incidence and type of DCI.
- To evaluate the risks of DCI associated with various submarine escape scenarios using an animal model.
Main Methods:
- Conducted 748 pressure exposures in a submarine escape simulator between 1993 and 2006.
- Utilized a goat model to simulate saturation only, escape only, and saturation followed by escape exposures.
- Recorded and analyzed the incidence and clinical presentation of DCI following each exposure type.
Main Results:
- DCI following saturation exposures primarily manifested as limb pain.
- DCI following escape exposures predominantly involved the central nervous system with rapid onset.
- No significant correlation was found between DCI risk and the range of escape depths studied.
Conclusions:
- The combined risk of DCI from escape after saturation was greater than the sum of independent risks.
- Findings indicate that saturation diving followed by escape presents a unique and elevated DCI risk profile.
- This research has informed updated safety guidelines for submarine escape operations.
