Forty Exam Rooms, One Three-Hour Window, Two Isolation Rooms
A 220-bed hospital's outpatient wing has 40 exam rooms totaling 9,000 ft² of 100% solution-dyed nylon cut pile with a waterproof backing. The wing runs 24/7, but housekeeping has only 05:00–08:00 to clean carpet because patients arrive at 08:00 and the waiting room cannot be closed. The previous vendor used a portable extractor at roughly 1 gallon per 100 ft²; rooms were still damp at 08:00, two patients slipped, and the infection-control nurse now requires no wet carpet at handoff. Two of the 40 rooms are on contact precautions for C. difficile, and one had a norovirus exposure the prior week. You must also avoid strong odors near a pediatric waiting area. You have two low-moisture encapsulation machines, a portable hot-water extraction unit, air movers, and one 3-hour window. Staffing is two technicians plus you.
1. Choose the cleaning method and sequence for the 40 rooms, and justify the choice against the 3-hour window and infection-control requirements.
Read the worked answer
Use low-moisture encapsulation for the 37 non-isolation rooms, with a CRI Seal of Approval product at label dilution, 10-minute dwell, brush or microfiber-pad agitation, and 20–30 minutes to dry. That fits 3 hours and leaves no wet carpet at handoff. Sequence from the far end toward the exit starting at 05:00, so the last rooms cleaned are nearest the entrance.
Clean the two C. difficile rooms last with dedicated tools and PPE. C. difficile is a spore, so ordinary soil removal is not disinfection; check with infection control for an EPA-registered sporicidal product labeled for the carpet, apply it at the labeled dwell time, and avoid dry brushing that aerosolizes spores. If no product is labeled for carpet, document that limitation and use extraction with minimal moisture, then dry. Use fragrance-free chemistry in the pediatric area. Air movers go on at 05:30 and moisture is verified at 07:30, with handoff at 07:45.
2. What safety controls would you put in place for the isolation rooms, the cleaning chemicals, and slip/fall prevention?
Read the worked answer
Isolation rooms: gloves, gown, shoe covers, hand hygiene on exit, and dedicated or disposable pads and brushes. Do not carry a contaminated pad into the next room. Waste water goes to the designated utility sink or per hospital policy, not a public drain.
Chemicals: keep containers labeled, never decant into unmarked bottles, and keep the SDS on site. Mix in a ventilated area and avoid fragrance near the pediatric waiting area. Electrical: keep cords out of egress paths and tape them down; use GFCI-protected outlets.
Slip/fall: barrier tape and wet-floor signs at each room entrance, one technician stationed at the corridor entrance to redirect patients, and a moisture-meter walk-through at 07:45. Do not release a room on visual inspection alone. Record product, dilution, dwell time, room numbers, and moisture readings so the infection-control nurse can audit the handoff.
3. At 06:30 one encapsulation machine fails. What do you do, and what do you communicate?
Read the worked answer
Triage by risk. Finish the occupied path and the two isolation rooms first, then convert the remaining rooms to the second machine or to dry vacuuming plus spot treatment. If only one machine remains, clean entrances, the waiting area, and the rooms on today's schedule; defer the rest to an evening slot with written approval. Do not leave wet carpet at 08:00 under any circumstance-air movers and access restriction are mandatory if moisture remains.
Notify the charge nurse and facility manager immediately, state which rooms were cleaned and which were not, and give an ETA. Document the failure, the rooms deferred, and the moisture readings. Follow up with a maintenance ticket on the failed machine and a written note that the deferral was an operational decision, not a cleaning-quality issue.