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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

100 MSW Trials on Indigenous SES: Problems & Solutions

Surg Lt Cdr Rohit Verma

PMO & Graded Specialist (Marine Medicine)

INS Nireekshak

scope
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
background
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
background1
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
problems of the trial directive overview
Problems of the Trial DirectiveOverview
  • Mimicking Submarine Escape
  • Control on IDA 59M
  • Compression & Decompression Rates
  • Submarine Escape Tables
  • Objective monitoring of Parameters
proposed objectives of the trial
Proposed Objectives of the Trial
  • Partial Pressure of Oxygen
  • Partial Pressure of Nitrogen
  • Partial Pressure of Carbon Dioxide
  • Psychological Aspects
  • Endurance of the set
limitations of the trial
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
diving issues and solutions
Diving Issues and Solutions
  • Classification as Experimental Dive
  • Rate of Compression
  • Decompression Schedule
  • Endurance of the Set
medical issues and solutions
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
medical issues and solutions1
Medical Issues and Solutions

Decompression Sickness

  • Preventive Strategies
    • Slow rate of Decompression
    • High Vann K factor
    • High Partial Pressure of Oxygen
    • Selection of Personnel
medical issues and solutions2
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

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