Hyperbaric Equipment Operation & Safety Flashcards
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Read the first 7 Hyperbaric Equipment Operation & Safety flashcards as text
Which gas is used to pressurize a multiplace hyperbaric chamber to minimize fire risk compared to using oxygen alone?
Answer: Medical-grade compressed air
Medical-grade compressed air (approximately 21% O2 / 79% N2) is used to pressurize multiplace chambers so patients breathe 100% O2 via masks or hoods, keeping the ambient atmosphere non-flammable.
What is the function of a through-hull penetration fitting in a hyperbaric chamber?
Answer: Allows electrical cables or medical lines to pass through the chamber wall while maintaining pressure integrity
Through-hull fittings are pressure-rated, sealed penetrations that allow electrical, gas, or monitoring lines to pass through the vessel wall without compromising the pressure boundary.
A fire breaks out inside an occupied monoplace hyperbaric chamber. The operator's FIRST action must be to:
Answer: Begin emergency decompression immediately while activating the fire suppression system
Emergency decompression must begin immediately to remove the high-oxygen environment and allow safe evacuation; opening the door without decompression would cause fatal barotrauma.
When inspecting a hyperbaric chamber viewport (acrylic window), which finding requires the chamber to be taken out of service immediately?
Answer: A crazing crack or deep scratch that penetrates the acrylic material
Crazing or deep scratches in acrylic viewports indicate structural compromise; such viewports can fail catastrophically under pressure and must be replaced before use.
The primary reason for maintaining a minimum separation distance between hyperbaric chambers and ignition sources is to:
Answer: Prevent oxygen-enriched exhaust gases from contacting sparks or open flames
Hyperbaric chambers vent oxygen-enriched exhaust that can create a flammable atmosphere near the chamber, making separation from ignition sources essential.
Which personnel certification is specifically recognized for hyperbaric chamber operators in the United States?
Answer: Certified Hyperbaric Technologist (CHT) through NBDHMT
The National Board of Diving and Hyperbaric Medical Technology (NBDHMT) issues the CHT credential, which is the recognized certification for hyperbaric technologists in the US.
What is the purpose of a 'block and bleed' valve configuration on a hyperbaric oxygen supply line?
Answer: Allows isolation of a valve for maintenance while confirming no downstream pressure remains
Block-and-bleed configurations use an isolation (block) valve and a vent (bleed) valve so technicians can safely confirm zero energy before servicing a section of the line.