Barrier
Personal protective equipment or physical separation used to prevent pathogen transmission between patient and healthcare worker.
On NCLEX-RN, barrier items rarely ask “what is a barrier” — they make you match the right PPE to a scenario or catch a technique error. The tell is a stem describing a task such as starting an IV or entering a tuberculosis room. The choice hinges on anticipated exposure plus the precaution in place — gloves for anticipated blood contact; add a gown and fluid-resistant mask with eye protection when splash of body fluid is likely. The highest-yield trap: soap-and-water hand washing, not alcohol-based rub, after a client with C. difficile or norovirus, because alcohol does not reliably kill the spores or this hardy virus.
Don’t confuse a barrier with precautions and isolation: a barrier is the physical item, while the others are the system dictating which item and which room. Students also overcredit gloves — gloves never replace hand hygiene, and you change them (with hand hygiene) when moving from a dirty to a clean site on the same client. Match the respirator to transmission: an N95 for airborne, a surgical mask for droplet.
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