CRCST key terms

The number and type of microorganisms present on an item before sterilization. It is measured during validation and routine monitoring because high levels can overwhelm a sterilization process.

The physical removal of soil, blood, tissue, and microorganisms from a device, usually with water, detergent, and mechanical action. It must occur before disinfection or sterilization because residual soil shields microbes.

The process of rendering a used device safe to handle by reducing or removing contaminants. In a sterile processing department it begins at the point of use and continues through cleaning and disinfection.

Immediate care of a contaminated device where it was used, such as wiping gross soil and keeping it moist. It prevents blood and debris from drying and makes later cleaning more effective.

A cleaning agent containing enzymes that break down proteins, fats, and carbohydrates. It is used for manual and ultrasonic cleaning, especially on devices with complex channels or heavy organic soil.

A tank that uses high-frequency sound waves to create cavitation bubbles that lift soil from instrument surfaces and lumens. It is a cleaning step, not a sterilization or disinfection process.

Use of hot water or steam at a controlled temperature and exposure time to reduce microorganisms on cleaned devices. It is often the final step of a washer-disinfector cycle before inspection.

A machine that cleans, rinses, and thermally disinfects devices in a controlled cycle. Operators must verify cycle parameters and load configuration because improper loading can leave soil or block water flow.

The inner channel or bore of a tubular device such as a cannula, suction tip, or endoscope. Lumens require special cleaning and rinsing because soil and moisture can be trapped inside.

Checking the inside of a channel for residual soil, moisture, damage, or blockage, often with a borescope or by flushing. It confirms that cleaning reached the entire internal surface.

Objective testing that confirms a cleaning process removed soil, such as a protein residue test or a soil test kit. It supplements visual inspection, which cannot detect invisible residues.

The visual and functional check of a cleaned device for cleanliness, damage, alignment, sharpness, and completeness. Items that fail inspection are removed from the workflow and repaired or discarded.

A check that a device operates as intended, such as opening and closing a ratchet, locking a box lock, or testing a scope's optics. It confirms the item is safe and effective for its clinical use.

The hinge area where the two halves of a hinged instrument meet and pivot. It must be inspected for cracks, corrosion, and stiffness, and it is a common site for retained soil.

Arranging inspected instruments and devices into the correct configuration, count, and sequence for a procedure or set. It requires following a written inventory or count sheet exactly.

A document listing every item and quantity that belongs in a set. It is used during assembly and again at the point of use to verify completeness and prevent retained items.

The materials and method used to enclose a sterile item so that sterilant can penetrate, air can be removed, and the contents stay sterile until opened. Selection depends on the sterilization method.

The package that keeps a sterilized item free from microorganisms until it is opened. It must allow sterilization, resist tears and punctures, and seal reliably.

The condition of a package seal that prevents microorganisms from entering. It is checked visually and by seal strength or dye penetration testing, and any defect requires repackaging.

A device that changes color or appearance when exposed to one or more sterilization parameters. It shows that an item was processed but does not prove sterility.

A prepared population of highly resistant microorganisms used to test whether a sterilization cycle actually kills microbes. It is the most reliable routine check of sterilization effectiveness.

The probability that a device is nonsterile after a validated sterilization process, commonly expressed as one in a million. It is established during validation, not by inspecting a single item.

Documented evidence that a process consistently produces a sterile product under defined conditions. It includes installation, operational, and performance qualification before routine use.

A pressure vessel that sterilizes with saturated steam under pressure. Air removal, temperature, pressure, and exposure time must be controlled for steam to contact every surface.

Sterilization using saturated steam at elevated temperature and pressure, typically 121 to 134 degrees Celsius. It is fast, non-toxic, and suitable for heat- and moisture-stable items.

A test pack used to confirm that air is removed and steam penetrates a load in a prevacuum sterilizer. A failed result means the sterilizer must not be used until corrected.

A low-temperature sterilization method using a toxic, flammable gas. It requires aeration after the cycle to remove residues and is used for heat- or moisture-sensitive devices.

The controlled period after ethylene oxide sterilization during which residual gas leaves the load. Adequate aeration is required before items are handled or used.

Keeping sterilized items in a controlled area that protects them from moisture, dust, pests, and damage. Environmental conditions and handling practices determine how long a package stays sterile.

The principle that a package remains sterile until an event compromises it, such as a tear, moisture, or a broken seal. It replaces fixed expiration dates with inspection-based shelf life.

The movement of sterile items from storage to the point of use while maintaining package integrity and traceability. It includes transport, handling, and restocking of supply areas.

The ability to track a sterilized item back to its processing cycle and forward to the patient or location. It supports recall, investigation, and quality improvement.

Documentation of a sterilization load that includes cycle parameters, indicators, biological test results, and the items processed. It links each item to the conditions under which it was sterilized.

Infection control practices applied to all patients and all body fluids, including hand hygiene and use of personal protective equipment. They are the baseline for safe work in decontamination areas.

Barriers worn to protect the worker from exposure, such as gloves, gowns, masks, eye protection, and face shields. Selection depends on the task and the risk of splash or aerosol.

Practices that prevent needlestick and cut injuries, including safe handling, no recapping, and immediate disposal in puncture-resistant containers. Injuries must be reported and evaluated.

The planned activities and checks that ensure processing meets established standards, such as monitoring, audits, and corrective action. It focuses on preventing defects rather than finding them later.

The specific tests and measurements performed on a product or process to verify it meets requirements, such as indicator results and seal checks. It is one part of a broader quality assurance program.

Tracking and controlling supplies and instruments so that the right items are available without excess or shortage. It includes par levels, rotation, and monitoring of usage and expiration.