CRCST Exam PrepThe short answer: Point-of-use treatment is the first step of the decontamination workflow, done where the instruments were used, immediately after the procedure. Gross soil gets wiped off with sterile water, instruments are kept moist with water or enzymatic pre-treatment products (never saline), hinged instruments are opened, lumens are flushed, and everything travels to decontamination in covered, leak-proof, labeled containers. It is pre-treatment, not cleaning, and its whole purpose is to stop blood and body fluids from drying before real cleaning begins.
Why drying is the enemy
Blood and body fluids start drying within minutes of a procedure ending. Dried soil is dramatically harder to remove: it hardens in box locks, serrations, teeth, and lumens, where brushes and ultrasonic energy later struggle to reach it. Worse, dried bioburden can shield microorganisms from sterilant contact in the final sterilization step, which means a sloppy start can cause a sterile-looking tray to fail. Keeping instruments moist until they reach decontamination is the single highest-value thing the using department can do for the sterile processing department. Our decontamination workflow guide picks up where this guide leaves off.
The point-of-use treatment steps
- Wipe off gross soil: use a soft, lint-free cloth or sponge moistened with sterile water to remove visible blood and tissue. No abrasive pads on instrument surfaces.
- Keep everything moist: cover instruments with a towel moistened with sterile water, or apply an enzymatic pre-treatment spray, foam, or gel per the product instructions. Moist, not soaking: instruments should not sit submerged in standing water for long periods.
- Open and disassemble: open all hinged instruments so soil does not dry inside the box lock. Disassemble multi-part instruments per the device IFU, and flush lumens and channels with sterile water.
- Protect and separate: protect delicate items such as scopes and microsurgical tips from damage, and place sharps in puncture-resistant containers.
- Contain and label: place instruments in covered, leak-proof, rigid containers or trays, clearly labeled as contaminated (biohazard labeling), so everyone handling them downstream knows what they are.
- Transport promptly: move the contained instruments to the decontamination area as soon as possible, using closed carts or covered containers. Handlers wear PPE because these items are contaminated.
What to use, and what to avoid
| Do | Do not |
|---|---|
| Sterile water for wiping and moistening | Saline, which pits and corrodes stainless steel |
| Enzymatic spray, foam, or gel per product instructions | Household cleaners or unapproved chemicals |
| Soft, lint-free cloths or sponges | Abrasive pads or metal brushes on instrument surfaces |
| Keep instruments moist until decontamination | Let instruments air-dry, or soak them submerged for hours |
| Open hinges, disassemble per IFU, flush lumens | Leave instruments closed and assembled with soil inside |
| Covered, leak-proof, labeled containers; closed carts | Open trays or uncovered transport |
Transport rules the exam tests
Transport is part of point-of-use treatment, and the exam treats it as a safety question. Contaminated instruments must travel in covered, leak-proof, rigid containers or closed carts, labeled as contaminated or with biohazard marking. The container protects both the instruments and the people moving them. Sharps ride in puncture-resistant containers, never loose in a tray. Transport should happen promptly, because the entire point of the earlier steps is to minimize the time soil has to dry. Anyone handling these containers wears appropriate PPE, since everything inside is contaminated.
What point-of-use treatment is not
Point-of-use treatment does not replace cleaning. The exam will occasionally frame a scenario where pre-treatment was done well and ask whether decontamination can be skipped: the answer is no, always. Full cleaning still happens in the decontamination area, following the detergent manufacturer's instructions, with manual or mechanical methods chosen per the device IFU. Think of point-of-use treatment as protecting the soil so cleaning can remove it, not as removing it yourself.