Safety, Sanitation and Infection Control
Safety
What this domain really tests
Safety questions ask whether you can spot a hazard before it reaches a client. Group hazards into three families and study them separately: electrical, chemical, and physical/ergonomic.
Electrical. The classic trap is water near current. Receptacles near sinks must be protected by a ground-fault circuit interrupter, appliances need intact grounding prongs, cords never cross walkways and never wrap around a hot tool. A damaged cord goes out of service, never back into service with tape.
Chemical. Store products by compatibility, never above eye level, never in unlabeled containers. Keep safety data sheets where staff can reach them. Ventilate the room. Never combine products unless the manufacturer directs it.
Physical and ergonomic. Adjust the client's chair and your own stance; keep wrists neutral and elbows low. With thermal tools, test the temperature before it touches a client and never rest a hot iron against a cord or a plastic surface.
Emergency readiness. Know where the first aid kit, extinguisher, and spill kit live, and know when to cool a burn with water versus flush a chemical splash for the time the label specifies.
Traps to expect: gloves do not replace hand washing; "we've never had a problem" is never a defensible answer; and an unlabeled spray bottle is a violation even if you know what is in it.
Rule of thumb: before each task, name one hazard and one control. Wet hands plus a cord equals a shock, so dry hands and a dry cord come first.
Sanitation and Infection Control
Three levels, one ladder
Every question in this domain reduces to a three-rung ladder. Cleaning removes visible soil with soap and water. Disinfection kills most pathogens on nonporous surfaces using an EPA-registered hospital-grade product. Sterilization destroys all microbial life including spores, and is usually done in an autoclave.
The exam's favorite trap is the item that cannot climb the ladder. Porous materials (wood, cloth, foam, some plastics) cannot be reliably disinfected, so they are single-use or discarded. Nonporous implements must be cleaned first, then fully immersed in disinfectant mixed at label strength, for the full contact time, in a labeled covered container. Solution is changed per the manufacturer, and its strength is checked with test strips, not with the eye.
Standard precautions treat every client's blood and body fluids as infectious. For a blood spill: gloves, absorb, disinfect with a tuberculocidal product or a freshly mixed bleach dilution, then double-bag the waste.
Client screening matters as much as chemistry. Ringworm, lice, impetigo, and open weeping lesions are referrals, not services, and a client with an inflamed or broken scalp does not get a chemical service.
Trap to expect: a product labeled "hospital grade" does not kill spores, and a quick dip is not the same as full immersion for the labeled time.
Worked example: classify a wooden comb - porous, so it is cleaned and discarded rather than soaked; classify a steel shear - nonporous, so it is cleaned and fully immersed.