T/F regarding sterilization and disinfection a) b) c) d) e) Endoscopy is disinfected using high level disinfectants. Oil and powders are best sterilized by autoclaving. Gamma radiation is used to sterilize re-used equipments. HEPA filters are used for contaminated air. Blood spill is cleaned using 1% hypochlorite.
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CDC disinfection sterilization high level disinfection endoscopes blood spills hypochlorite HEPA gamma radiation
a) True - Flexible endoscopes are semicritical devices and require high-level disinfection after thorough cleaning. Some endoscopes that enter sterile tissue require sterilization where feasible. The CDC guidance supports high-level disinfection for GI endoscopes.
b) False - Oils and powders are sterilized by dry heat (hot-air oven), not steam autoclaving. Steam does not penetrate oils and powders reliably.
c) False - Gamma radiation is mainly used commercially for prepacked disposable items such as syringes, gloves, and plastic equipment, not for re-used equipment. Sherris & Ryan's Medical Microbiology, ionizing radiation used for surgical supplies.
d) True - HEPA filters remove contaminated airborne particles and are used in areas such as operating rooms, isolation rooms, and biological safety systems. Harrison’s Principles of Internal Medicine, airborne precautions.
e) True - Blood spills are commonly decontaminated with 1% sodium hypochlorite in standard infection-control teaching. More specifically, concentration and technique can vary with spill volume and local protocol; CDC recommendations support chlorine solutions for blood-spill decontamination.
Answers: T, F, F, T, T.
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