1.4 Cleaning & Disinfecting Equipment and the Patient Environment
Key Takeaways
Cleaning removes soil and must come before disinfection, because blood and other organic matter block most disinfectants.
The Spaulding classification sends intact-skin items such as BP cuffs and stethoscopes to low-level disinfection, mucous-membrane items to high-level disinfection, and sterile-tissue items to sterilization.
A disinfectant works only if the surface stays wet for the full contact time printed on the EPA-registered product label.
C. difficile spores require an EPA List K sporicidal product, such as a bleach-based disinfectant; standard quaternary ammonium wipes are not enough.
CDC advises cleaning and disinfecting a shared blood glucose meter after every patient use according to the manufacturer's instructions.
Cleaning & Disinfecting Equipment and the Patient Environment
NCCT's test plan opens the Infection Prevention and Safety category with a task that sounds simple: disinfect non-disposable medical equipment. It matters because healthcare-associated infections often travel on objects, called fomites, rather than directly between people. A blood pressure cuff, a stethoscope, a wheelchair, a bedside commode, or an ECG lead wire that moves from room to room without proper decontamination can carry MRSA, VRE, norovirus, or C. difficile spores to the next patient. The PCT touches more shared equipment in a shift than almost anyone else on the unit.
Cleaning, Disinfection, and Sterilization
| Process | What It Does | Typical PCT Example |
|---|---|---|
| Cleaning | Physically removes dirt, blood, and organic matter with detergent and friction; it lowers the number of germs but does not kill them all | Wiping visible soil off a commode seat before disinfecting it |
| Disinfection | Kills most pathogens on inanimate surfaces with a chemical; levels are low, intermediate, and high | Wiping a BP cuff with an EPA-registered hospital disinfectant |
| Sterilization | Destroys all microbial life, including spores, using steam, gas, or chemical sterilants | Handled by sterile processing, not the PCT |
Cleaning always comes first. Blood, stool, and mucus shield microorganisms and chemically inactivate many disinfectants, so wiping disinfectant over visible soil gives false confidence.
The Spaulding Classification
Hospitals decide how to reprocess each item by how it touches the patient, a system called the Spaulding classification:
| Category | Contact With | Required Process | Examples |
|---|---|---|---|
| Critical | Sterile tissue or the vascular system | Sterilization | Surgical instruments, implants, needles |
| Semicritical | Mucous membranes or non-intact skin | High-level disinfection (at minimum) | Laryngoscope blades, respiratory therapy equipment, reusable vaginal specula |
| Noncritical | Intact skin only | Low- or intermediate-level disinfection | BP cuffs, stethoscopes, pulse oximeter probes, ECG lead wires, bed rails, wheelchairs, commodes |
Most items a PCT reprocesses at the bedside are noncritical. Semicritical and critical items go to the appropriate department in closed, labeled containers; the PCT never "wipes and reuses" them.
Using Disinfectants Correctly
- Use only facility-approved, EPA-registered hospital disinfectants, and read the label for the kill claims and the contact time (also called wet time or dwell time). The surface must stay visibly wet for that full period; if it dries early, apply more.
- Wear the PPE the label requires, usually gloves, and follow the product's rules about ventilation and skin contact. Safety Data Sheets explain the hazards (see Section 2.2).
- Work from clean to dirty and from top to bottom, and use a fresh wipe when one becomes visibly soiled. Using one wipe for the bed rail, the overbed table, and then the call light spreads organisms instead of removing them.
- Alcohol-based hand rub is not an equipment disinfectant. Alcohol prep pads may be used on some items if the facility allows, but only as directed.
- For C. difficile, use an EPA List K sporicidal product, such as a bleach-based disinfectant. Spores survive most quaternary ammonium ("quat") and alcohol products.
High-Risk Shared Equipment
| Item | Rule |
|---|---|
| Blood glucose meter | CDC advises dedicating meters to one patient when possible. If a meter must be shared, clean and disinfect it after every use exactly as the manufacturer directs. Never share lancing devices or fingerstick pens. |
| Stethoscope | Wipe the diaphragm, bell, and tubing between patients; keep a dedicated stethoscope in rooms on Contact Precautions. |
| BP cuffs and oximeter probes | Disinfect between patients; use disposable or dedicated cuffs for isolation rooms. |
| ECG lead wires and machine | Disinfect lead wires and cables after each patient, then store them untangled on the cart. |
| Wheelchairs, stretchers, lifts | Disinfect handles, armrests, and seats after each use; change the lift sling or use a single-patient sling. |
| Commodes and bedpans | Empty, clean, and disinfect after each use; keep bedpans single-patient and stored off the floor. |
Cleaning Up a Blood Spill
A broken blood tube or a spill from a drain is both an exposure risk and a slip hazard. Under OSHA's Bloodborne Pathogens Standard, contaminated surfaces must be decontaminated as soon as feasible.
- Keep others away and put on gloves; add a gown and eye protection if splashing is possible.
- Never pick up broken glass with your hands. Use tongs, forceps, or a brush and dustpan, and place the pieces in a sharps container.
- Cover the spill with absorbent material or a spill-kit powder and wipe up the visible blood.
- Apply an EPA-registered disinfectant with a bloodborne-pathogen claim, or a freshly mixed bleach solution if the facility uses one (CDC guidance uses a 1:10 dilution for large spills with heavy organic matter and a 1:100 dilution for small spills after cleaning), and leave it for the full contact time.
- Discard saturated materials as regulated medical waste, remove PPE, perform hand hygiene, and report the spill according to policy.
Linen and General Housekeeping
- Soiled linen: hold it away from your uniform, roll the dirty side inward, and bag it at the point of use. Never shake it or place it on the floor, chair, or overbed table.
- Clean linen: carry it away from your body and take only what you need into the room. Unused linen from an isolation room goes to the laundry, not back to the cart.
- Clean and dirty utility rooms stay separate: clean supplies are never stored in the dirty utility room, and used equipment never goes back to the clean room until it has been reprocessed.
- Daily room care: clear clutter, empty trash and linen hampers before they overflow, wipe high-touch surfaces per policy, report spills and broken equipment, and place wet-floor signs. Environmental services performs terminal cleaning after discharge or transfer, but the PCT keeps the room safe between those cleanings.
Clinical Trap: The Two-Second Wipe
A PCT wipes a BP cuff with a disinfectant wipe and immediately wraps it on the next patient's arm. The label requires the surface to stay wet for two minutes, so the cuff was never actually disinfected. The fix is to disinfect it after the previous patient, let it air-dry for the full contact time, or use a dedicated or disposable cuff.
Under the Spaulding classification, how should a reusable blood pressure cuff be reprocessed between patients?
Sterilization in the central processing department
High-level disinfection because it touches the patient
Rinsing with tap water and air-drying
Low- or intermediate-level disinfection with an EPA-registered hospital disinfectant, because it contacts only intact skin
A unit shares one blood glucose meter among several patients. What does CDC guidance require?
Clean and disinfect the meter after every patient use according to the manufacturer's instructions, and never share lancing devices
Wipe the meter with alcohol-based hand rub at the end of each shift
Clean the meter only when blood is visible on it
Store the meter in the clean utility room without cleaning, because it touches only fingertips
A tube of blood breaks on the floor of a patient room. Which action is correct?
Pick up the large pieces with gloved hands, then mop the floor with water
Cover the spill with a towel and leave it for environmental services to find at the next scheduled cleaning
Put on gloves, remove the glass with tongs or a dustpan into a sharps container, absorb the blood, then disinfect for the full label contact time
Spray alcohol-based hand rub on the spill and let it evaporate
Sections you finish are checked off in the contents.