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100 MSW Trials on Indigenous SES: Problems & Solutions

100 MSW Trials on Indigenous SES: Problems & Solutions. Surg Lt Cdr Rohit Verma PMO & Graded Specialist (Marine Medicine) INS Nireekshak. SCOPE. Background Overview of the Problems of the Trial Directive Proposed Objective of the Trials Limitations of the Trial Diving Issues & solutions

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100 MSW Trials on Indigenous SES: Problems & Solutions

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  1. 100 MSW Trials on Indigenous SES: Problems & Solutions Surg Lt Cdr Rohit Verma PMO & Graded Specialist (Marine Medicine) INS Nireekshak

  2. SCOPE • Background • Overview of the Problems of the Trial Directive • Proposed Objective of the Trials • Limitations of the Trial • Diving Issues & solutions • Medical Aspects & solutions • Conclusion

  3. Background • Submarine Escape Suit (SES) • “Wet escape”: Exposure to the ambient pressure • Provide “breathable” pressurised gas mixture • Hypoxia • Oxygen Toxicity • Choice of “diluent gas” • Minimise chance of DCS & Inert Gas Narcosis • Controlled Ascent Rate • Reduce risk of barotrauma & CAGE • “Survival at Sea” aspects

  4. Background • Currently Used: IDA 59M • Soviet origin • Mechanical model • Provides “Trimix”: 25% O2 + 15%He + 60% N2 • Varying amounts of Oxygen according to depth • ↓ O2: Reduces chances of O2 toxicity at depth • ↑ O2: Reduces chances of DCS at shallow depths & surface • Indigenous SES • Reverse engineered by DRDO • SMHQ: Need felt for “Human Trials” to 100MSW

  5. Problems of the Trial DirectiveOverview • Mimicking Submarine Escape • Control on IDA 59M • Compression & Decompression Rates • Submarine Escape Tables • Objective monitoring of Parameters

  6. Proposed Objectives of the Trial • Partial Pressure of Oxygen • Partial Pressure of Nitrogen • Partial Pressure of Carbon Dioxide • Psychological Aspects • Endurance of the set

  7. Limitations of the Trial • No remark on the individual set • Thermal insulation offered by the set • Pressure endurance of the materials of the set • Survival at Sea aspects

  8. Diving Issues and Solutions • Classification as Experimental Dive • Rate of Compression • Decompression Schedule • Endurance of the Set

  9. Medical issues and Solutions • Illnesses due to breathing gas abnormalities • Hypoxia • Hyperoxia • Carbon Dioxide Toxicity • Illnesses due to Inert Gas • Inert Gas Narcosis • High Pressure Neurological Syndrome

  10. Medical Issues and Solutions Decompression Sickness • Preventive Strategies • Slow rate of Decompression • High Vann K factor • High Partial Pressure of Oxygen • Selection of Personnel

  11. Medical Issues and Solutions Decompression Sickness • Therapeutic strategies • Type I DCS post dive • Type II DCS post dive • DCS during the course of the dive Barotraumas Not Dive Related (NDR) Illnesses Psychological issues

  12. Conclusion • Most complex human trial attempted in the Navy • Multiple spin offs

  13. Thank You

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