Managing the Ecosystem of Risk-2025 Troy Mi Hyperbaric Flash Fire

Managing the Ecosystem of Risk-2025

 The Troy Michigan Hyperbaric Flash Fire 31  Jan 2025

In the court proceedings of 16 September 2025- a witness was asked if the use of the grounding strap have prevented the incident of 31  January at the Oxford Recovery Center’s Troy Location?

The response given to the attorney’s question was yes

Well would the use of a grounding strap prevented a triboelectric static discharge in a monoplace hyperbaric chamber considering the following: 11 position changes with contact of  numerous materials and surfaces contacted in 66 seconds, a treatment pressure of 2 Atmospheres absolute, a ventilation rate of 400 litres/min and 100% oxygen from a liquid oxygen source.

Short answer: No—an anti-static (grounding) strap alone would not have reliably prevented a triboelectric discharge in that scenario. It reduces risk, but it doesn’t neutralize all the charge domains created by fast, repeated movements and fabric–acrylic contact in 100% O₂ at 2.0 ATA.

Why the strap isn’t enough here

1. What it actually grounds: The strap only bleeds charge from the patient’s body (if properly fitted and bonded). It does not automatically drain charge from clothing, bedding and linen, pillows, the mattress, or the acrylic shell—each of which can charge independently and discharge to a nearby object or to the patient.

2. Multiple charge domains from rapid repositioning: “11 position changes in 66 s” means frequent separation/slide events (skin↔fabric, fabric↔acrylic, gown↔sheet). Each contact/separation can create distinct charged regions. A strap on the wrist/ankle won’t keep up with charges being generated on insulating fabrics or on the chamber interior.

3. Acrylic + synthetics are excellent charge holders: Acrylic windows/liners and synthetic textiles sit far apart on the triboelectric series and are highly insulative, so they accumulate high surface potentials. Discharges can jump fabric→acrylic or fabric→metal even when the patient is grounded.

4. Oxygen-enriched, pressurized environment: At 2.0 ATA, 100% O₂, many materials have dramatically lower minimum ignition energies than in air at 1 ATA. An otherwise “minor” ESD that would be harmless in room air can be ignition-capable here.

5. Ventilation ≠ safer for static: 400 L/min O₂ flow doesn’t neutralize charge; if anything, the high, dry sweep gas can reduce local humidity at surfaces and increase tribocharging. (And it continuously supplies oxidizer if something ignites.)

6. Strap failure modes are common: Ineffective contact (over clothing, on dry/lotioned skin), broken lead, loose clip, wrong resistance path, or poor chamber bond all cut effectiveness—especially under vigorous movement.

What would materially reduce risk (in addition to a strap)

Use a layered ESD-control stack specific to monoplace HBOT:

• Textiles
  • Only cotton/linen gowns, sheets, blankets; no synthetics/fleece; no elasticized “performance” wear.
  • Use single-system linens (same fabric set) to avoid tribo pairings.
• Patient grounding (verified)
  • Strap on bare, clean, slightly moistened skin with wide contact; confirm continuity to chamber ground with a meter before treatment.
  • Target a dissipative path (typically 10⁵–10⁷ Ω) to limit current yet drain charge.
  • Consider a dissipative fitted sheet or mat bonded to ground, so linens and body share the same potential.
• Surface management
  • Avoid acrylic–fabric rubbing; place a cotton interface wherever the patient/fabric might contact acrylic.
  • Keep cables/tubing minimal and non-rubbing; route so they don’t “saw” against fabrics.
• Behavioral controls
  • Minimize movement: one deliberate reposition, then stillness. The “11 moves in 66 s” pattern is high-risk—train and cue the patient to avoid fidgeting once settled.
  • Coach staff to pause flow changes/repositioning until the patient is electrically “quiet” and linens are settled.