Sterilization Principles, Methods, and Quality Assurance in Sterile Processing

Overview and Regulatory Standards of Sterilization

• Definition of Sterilization: Sterilization is the process of completely destroying all microorganisms on inanimate objects. This process eliminates both pathogenic and non-pathogenic organisms, including highly resistant spore-bearing microbes.
• Definition of Sterile: A state of being completely free of all living microorganisms, including bacterial spores.
• Sterility Assurance Concepts:
  • Event-Related Sterility: Sterility is determined by how a package is handled and stored rather than by a calendar date. An item remains sterile indefinitely unless an event occurs that compromises package integrity (e.g., tearing, moisture, seal failure).
  • Time-Related Sterility: Sterility is managed by a specific expiration date printed on the package ("outdates"). Once the date passes, the item is no longer considered sterile.
  • Sterility Assurance Level (SAL): A statistical measurement ensuring devices are safe for patient use by establishing the probability of a single viable microorganism remaining on an item after sterilization (typically $10^{-6}$).
• Key Related Terminology:
  • Bioburden: The number of contaminating microbes present on an item prior to sterilization.
  • Disinfection: The destruction of most pathogenic microorganisms on inanimate objects, excluding bacterial spores.
  • Antisepsis / Asepsis: Antisepsis involves preventing infection by inhibiting microbial growth on living tissue; asepsis refers to the absence of pathogenic microorganisms.
• Regulatory & Professional Organizations Setting Standards:
  • AAMI: Association for the Advancement of Medical Instrumentation.
  • HSPA: Healthcare Sterile Processing Association (formerly IAHCSMM).
  • AORN: Association of periOperative Registered Nurses.

Spaulding Classification System

• Medical devices and surgical instruments are categorized according to patient contact risk to determine the necessary level of reprocessing:

• Critical Items:
  • Definition: Devices introduced directly into the bloodstream or into normally sterile areas of the body.
  • Examples: Surgical instruments, needles, surgical implants, cardiac catheters, and rigid probes used in sterile body sites.
  • Reprocessing Requirement: Must undergo Sterilization.
• Semi-Critical Items:
  • Definition: Devices that come in contact with intact mucous membranes or non-intact skin, but do not ordinarily penetrate sterile body pathways.
  • Examples: Vaginal and rectal ultrasound transducers, flexible endoscopes, laryngoscopes, and anesthesia breathing circuits.
  • Reprocessing Requirement: Requires High-Level Disinfection (HLD) or Sterilization.
• Non-Critical Items:
  • Definition: Devices that come into direct contact only with intact patient skin.
  • Examples: Blood pressure cuffs, stethoscopes, crutches, OR tables, and tourniquet cuffs.
  • Reprocessing Requirement: Requires Low-Level Disinfection or Intermediate-Level Disinfection.

Methods of Sterilization Overview

• Thermal (Physical) Methods:
  • Steam under pressure (moist heat).
  • Hot air / Dry heat:
  • Mechanical Convection: Uses a blower fan to circulate heated air; highly efficient.
  • Gravity Convection: Relies on natural thermal air displacement; less efficient.
• Radiation Methods:
  • Ionizing Radiation: Gamma rays, Electron beam (E-Beam), and X-rays.
  • Non-Ionizing Radiation: Ultraviolet light (UV-C).
• Chemical Methods (Liquid and Gas):
  • Ethylene Oxide (EtO) gas.
  • Hydrogen Peroxide Gas Plasma (HPGP).
  • Vaporized Hydrogen Peroxide (VHP).
  • Ozone gas ($O_3$).
  • Chlorine Dioxide gas.
  • Glutaraldehyde solution.
  • Peracetic Acid (e.g., STERIS systems).

Factors Influencing Sterilization Efficacy

• Bioburden: The quantity and resistance of microbial contamination present on the device.
• Contact and Penetration: The sterilant agent must make direct physical contact with all surfaces of the item and penetrate all wrapping or packaging materials.
• Package and Pan Assembly: Items must be placed in instrument trays without overcrowding to allow free sterilant circulation.
• Packaging Material Density: Packaging must permit sterilant penetration while providing an effective microbial barrier after processing.
• Chamber Loading: Proper arrangement of loads to ensure adequate air evacuation and sterilant distribution.
• Device Material Sensitivity: Selection of sterilization method depends on whether items are heat-sensitive, moisture-sensitive, or submersible.
• Microbial Resistance: Spore-forming organisms exhibit higher bio-resistance than vegetative bacteria, viruses, or fungi.
• Presence of Lumens:
  • Lumens present unique challenges to air removal and sterilant penetration.
  • Gravity Displaced Steam Sterilizers: Lumens should be flushed with a small amount of distilled water prior to processing to facilitate steam generation inside the channel.
  • Dynamic Air Removal (Prevacuum) Sterilizers: Lumens must be left dry to prevent water from blocking rapid air evacuation.
  • Always adhere to device-specific Instructions for Use (IFU).

Steam Sterilization (Thermal Processing)

• Principles of Action:
  • Moist heat in the form of saturated steam under pressure is the most reliable, economical, non-toxic, and widely available method of sterilization.
  • Microorganisms are killed through denaturation and coagulation of cellular proteins (analogous to cooking an egg).
  • Steam permeation heats items rapidly through the process of condensation.
• Steam Quality Requirements:
  • Steam must consist of $97\%$ water vapor (dry saturated steam) and $3\%$ liquid water.
  • If liquid moisture falls below $3\%$, the steam becomes super-heated (dry gas), reducing lethality and burning packaging.
  • If liquid moisture exceeds $3\%$, it creates "wet loads," leading to packaging contamination through liquid strike-through.
• Critical Parameters for Steam Sterilization:
  • Time: Duration required at a specific temperature to achieve microbial destruction.
  • Temperature: Higher temperatures decrease required exposure times.
  • Pressure: Used as a mechanical vehicle to elevate the temperature of steam inside a closed chamber above the normal boiling point of water ($212^\circ\text{F}$ / $100^\circ\text{C}$).
  • Humidity (Moisture): Essential for protein denaturation; dry heat requires significantly longer exposure.
  • Contact: Saturated steam must physically touch every surface and penetrate all packaging materials.
• Microbial Benchmark: Spores of Geobacillus stearothermophilus are destroyed within $12\,\text{min}$ at $250^\circ\text{F}$ ($121^\circ\text{C}$) under saturated steam conditions.

Steam Sterilizer Types and Cycle Mechanics

• Basic Sterilizer Components:
  • Inner Chamber: The interior compartment where the load is placed.
  • Metal Jacket: An outer stainless steel shell surrounding the inner chamber. High-temperature steam is held in the jacket continuously to keep chamber walls hot, thereby preventing excessive condensation during cycles.
  • Piped Steam Source: Dedicated high-pressure steam line.
  • Chamber Drain: Located at the bottom front of the chamber; houses a temperature-sensing element and strainer trap.
  • Air Filters: Filters incoming air to atmospheric pressure without recontaminating processed loads.

• Gravity Displacement Sterilizer (4-Phase Cycle):
  • Relies on gravity to remove air from the chamber. Steam enters at the top rear of the chamber and, being lighter than air, forces cooler air downward and out through the bottom front drain.
  • Phase 1 (Conditioning): Steam enters, air is forced down and out through the drain line until a pre-set temperature is detected at the drain sensor.
  • Phase 2 (Exposure): The timing mechanism starts once the target temperature is reached. Temperature is maintained by continuously removing cooled condensate at the bottom and admitting fresh steam at the top.
  • Phase 3 (Exhaust): The steam supply valve closes, the drain valve opens, and steam is exhausted out. Filtered ambient air enters to return chamber pressure to atmospheric level.
  • Phase 4 (Drying): Heated jacket walls radiate dry heat while fresh filtered air circulates (without a vacuum pump) to evaporate moisture. Requires longer drying periods.
• Dynamic Air Removal / Prevacuum (Pre-Vac) Sterilizer (6-Phase Cycle):
  • Utilizes a mechanical vacuum pump to actively pull air out of the chamber and load before steam injection.
  • Phases 1 & 2 (First Air Removal & Conditioning): Mechanical vacuum removes approximately $90\%$ of chamber air. Steam is injected to drive out residual air.
  • Phases 3 & 4 (Second Air Removal & Exposure): A second vacuum pulse removes residual air, achieving $99\%$ total air evacuation. Saturated steam enters under high pressure, rapidly penetrating porous loads to hold target exposure conditions.
  • Phase 5 (Exhaust): Saturated steam is drawn out rapidly with vacuum pump assistance.
  • Phase 6 (Drying): Timed drying cycle under deep vacuum; radiant jacket heat and filtered air drive off remaining moisture.

Dynamic Air Removal Testing: The Bowie-Dick Test

• Purpose: Evaluates the efficiency of the mechanical air removal (vacuum) system in dynamic air removal (prevacuum) sterilizers. It is not a test of sterility.
• Application:
  • Performed daily before running the first sterilization load of the day (typically on early morning or night shifts).
  • Performed after major sterilizer repairs or steam supply interruptions.
  • Not used for gravity displacement sterilizers.
• Placement: Placed flat on the bottom rack directly over the front chamber drain in an otherwise empty chamber.

• Interpretation:
  • Pass: Uniform, complete color change across the entire indicator sheet.
  • Fail: Incomplete or uneven color change, particularly a lighter spot in the center indicating air entrapment.
• Commercial Variants: Commonly known as DART (Dynamic Air Removal Test) or pre-packaged Bowie-Dick test packs (e.g., STERIS Verify, Browne TST).

Immediate-Use Steam Sterilization (IUSS)

• Formerly referred to as "flash" sterilization.
• Indications: Used strictly for urgent, unpredicted intraoperative needs when an essential unwrapped item is dropped or needed immediately. Should never be used for convenience or to compensate for insufficient inventory.
• Process Standards:
  • Items are processed unwrapped or in specialized rigid IUSS containers with closed-valve lid systems (e.g., "One Tray").
  • Cycle parameters feature abbreviated drying times ($0\text{--}1\,\text{min}$); instruments emerge wet at the end of the cycle.
  • Items must be transported immediately and aseptically from the sterilizer directly to the operating room field.
• Implants Policy: Implants should not undergo IUSS except in life-threatening emergencies where no alternative exists. If performed, a Biological Indicator (BI) must be processed in the cycle, and the implant must remain quarantined until BI results are known.

Steam Sterilization Parameters and Cycle Standards

• Gravity Displacement Sterilizer Parameters:
  • Wrapped Instrument Set: $250^\circ\text{F}$ ($121^\circ\text{C}$) for $30\,\text{min}$ exposure, with $15\text{--}30\,\text{min}$ drying time; or $270^\circ\text{F}$ ($132^\circ\text{C}$) for $15\,\text{min}$ exposure, with $15\text{--}30\,\text{min}$ drying time.
  • Unwrapped Instrument Set (no lumens): $270^\circ\text{F}$ ($132^\circ\text{C}$) for $3\,\text{min}$ exposure, with $0\text{--}1\,\text{min}$ drying time.
  • Unwrapped Instrument Set (lumens present): $270^\circ\text{F}$ ($132^\circ\text{C}$) for $10\,\text{min}$ exposure, with $0\text{--}1\,\text{min}$ drying time.
• Dynamic Air Removal (Prevacuum) Sterilizer Parameters:
  • Wrapped Instrument Set: $270^\circ\text{F}$ ($132^\circ\text{C}$) for $4\,\text{min}$ exposure, with $20\text{--}30\,\text{min}$ drying time.
  • Unwrapped Instrument Set (no lumens): $270^\circ\text{F}$ ($132^\circ\text{C}$) for $3\,\text{min}$ exposure, with no dry time (NA).
  • Unwrapped Instrument Set (lumens present): $270^\circ\text{F}$ ($132^\circ\text{C}$) for $4\,\text{min}$ exposure, with no dry time (NA).

Steam Sterilizer Loading, Unloading, and Troubleshooting

• Loading Principles:
  • Avoid contact between loaded items and the inner chamber metal walls.
  • Place solid, non-porous items on bottom shelves and fabric items on top shelves.
  • Position basins, solid trays, and textile packs vertically on edge (on side) rather than flat to facilitate air removal and condensate drainage.

• Arrange paper-plastic peel pouches on edge in holding racks, paper-to-plastic, to allow steam penetration.
• Do not stack containers or packs tightly together; leave space for steam circulation.
  • Unloading & Cooling Principles:
• Move the loading cart to a designated holding area free of air turbulence, cold drafts, or air vents.
• Do not handle hot items or place them on cool metal surfaces, which induces condensation and liquid strike-through.
• Allow items to cool completely to room temperature before handling or storing.
  • Causes of Wet Loads & Strike-Through:
• Condensate dripping from upper shelves or carriage racks.
• Steam line contamination or high water carryover.
• Overloading the cart or placing items too tightly together.
• Excessive density or quantity of metal instruments within a single tray.
• Clogged chamber drain strainer trap.
• Insufficient sterilizer drying phase.
  • Common Reasons for Sterilization Failures:
• Drain screen obstruction by debris or lint.
• Incorrect container or pack orientation.
• Inadequate pre-cleaning resulting in heavy residual organic bioburden.
• Overly tight wrapping of linen packs or instrument trays.

Radiation Sterilization Methods

• Ionizing Radiation:
  • Agents: Gamma rays (from Cobalt-60 sources), Electron Beam (E-Beam), and X-rays.
  • Application: Used commercially by industrial manufacturers for single-use, pre-packaged sterile medical supplies (e.g., plastic syringes, catheters, surgical gloves, hypodermic needles, single-use implants, guidewires).
  • Mechanism: Thermal and chemical energy breaks microbial DNA strands.
  • Characteristics: Extremely high penetration depth; leaves no residual radiation; does not pose a hazard to handlers. Internal chemical indicators are typically not used; package integrity must be inspected prior to use.
• Non-Ionizing Radiation:
  • Agent: Ultraviolet C (UV-C) shortwave radiation.
  • Mechanism: Disrupts nucleic acids and damages microbial DNA, causing cell death.
  • Spectrum: Effective against vegetative bacteria, fungi, and viruses; partially/unreliably effective against bacterial spores.
  • Limitations: Low penetration capability; blocked by packaging materials, glass, plastics, organic debris, and moisture.
  • Application: Air handling units, operating room terminal disinfection robots, laminar flow hoods, and water purification systems.

Ethylene Oxide (EtO) Gas Sterilization

• Physical Properties: Colorless gas; odorless at low concentrations; possesses an ether-like odor at higher concentrations.
• Mechanism of Action: Kills microorganisms through Alkylation (replaces hydrogen atoms in cellular proteins with chemical alkyl groups, disrupting normal metabolic and reproductive functions).
• Advantages: Non-corrosive to metals; safe for delicate, heat-sensitive, and moisture-sensitive devices (e.g., flexible endoscopes, micro-instruments, power equipment batteries, respiratory gear).
• Disadvantages: Highly toxic, flammable, and explosive in pure form; long overall cycle duration due to mandatory post-sterilization aeration; expensive; strictly regulated by OSHA, FDA, and EPA.
• Critical Parameters for EtO:
  • Gas Concentration: Gas introduced under pressure via dedicated single-use cartridges or bulk cylinders. Often diluted with inert gases (e.g., $12\%$ EtO blended with $88\%$ Chlorofluorocarbon CFC-12, or Carbon Dioxide $CO_2$) to suppress flammability.
  • Temperature: Elevated temperatures increase gas penetration through cell walls. Standard operating temperatures range from $85^\circ\text{F}$ to $145^\circ\text{F}$ ($29^\circ\text{C}$ to $63^\circ\text{C}$).
  • Humidity: Crucial parameter. Relative humidity must be maintained between $30\%$ and $80\%$ to rehydrate dried bacterial spore coats, allowing gas absorption.
  • Time: Prolonged exposure time depending on gas concentration, temperature, and chamber humidity.
• Loading & Unloading Standards:
  • Load items in wire baskets on edge; do not stack.
  • Place a Biological Indicator (BI) in the physical center of the load.
  • Upon cycle completion (if no automatic internal purge occurs), crack the sterilizer door $2\text{--}8\,\text{inches}$ and evacuate the immediate room area for $15\,\text{min}$.
  • Pull transfer carts rather than pushing them to avoid inhaling residual off-gassing.
• Aeration Requirements:
  • EtO gas is readily absorbed by porous materials including rubber, plastics, paper, and textiles (it is not absorbed by metal or glass).
  • All porous items sterilized with EtO must undergo mandatory extended aeration in a dedicated aerator chamber with continuous filtered air exchange.
  • Typical aeration parameter: $12\,\text{hours}$ at $120^\circ\text{F}$ ($49^\circ\text{C}$).

Liquid Chemical Sterilization

• Indications: Total immersion of critical or semi-critical heat-sensitive items that cannot tolerate high-temperature steam or gas plasma.
• Glutaraldehyde (Cidex):
  • Concentration: $2\%$ alkaline glutaraldehyde solution diluted with distilled water.
  • Sterilization Requirement: Total immersion for $10\,\text{hours}$ at room temperature.
  • High-Level Disinfection Requirement: Immersion for $20\text{--}45\,\text{min}$ (depending on formulation).
  • Characteristics: Non-corrosive to stainless steel and optical lenses.
  • Safety Hazards: Emits toxic vapor; requires dedicated local exhaust ventilation, covered soaking basins, protective eyewear, and vapor-proof masks. Requires testing with Minimum Effective Concentration (MEC) test strips prior to each use.
• Peracetic Acid Processing (STERIS System 1 / System 1E):
  • Mechanism: Single-use concentrated peracetic acid formulation (e.g., STERIS 20) combined with warm water immersion.
  • Cycle Parameters: Operating temperatures of $122^\circ\text{F}\text{--}131^\circ\text{F}$ ($50^\circ\text{C}\text{--}55^\circ\text{C}$) with an exposure phase followed by multiple sterile water rinse cycles (~$18\,\text{min}$ total cycle).
  • Application: Used for flexible and rigid surgical endoscopes.
  • Handling Standard: Items are processed unwrapped for "just-in-time" immediate reuse; items cannot be stored for future use.

Hydrogen Peroxide Gas Plasma (HPGP) Sterilization

• Trade Name: STERRAD system.
• Mechanism of Action: Vaporized hydrogen peroxide ($H_2O_2$) is injected into a vacuum chamber. Radiofrequency (RF) energy is applied to the gas vapor, converting it into a low-temperature gas plasma cloud containing active free radicals (hydroxyl and hydroperoxyl) that break down microbial cellular components.
• Advantages: Low operating temperature ($98^\circ\text{F}\text{--}111^\circ\text{F}$ / $37^\circ\text{C}\text{--}44^\circ\text{C}$); rapid cycle times (~$30\text{--}45\,\text{min}$); produces no toxic residues (breaks down into oxygen and water vapor); requires no aeration.
• Disadvantages & Material Incompatibilities:
  • Strictly incompatible with cellulose-based materials: paper, linen, cotton, wood, cardboard, foam, and gauze sponges (cellulose absorbs hydrogen peroxide, causing cycle aborts).
  • Solid metal trays block RF energy waves.
  • Causes nylon to become brittle over time.
  • Restricted lumen length and internal diameter tolerances.
  • Devices must be $100\%$ completely dry prior to processing.
• Packaging Requirements: Requires non-cellulose synthetic wraps (polypropylene) or Tyvek heat-seal peel pouches.
• Compatible Items: Flexible and rigid endoscopes, cameras, light cables, power equipment batteries, laser fiber optics, stereotactic equipment, and ophthalmic devices.

Alternative Chemical Gas Sterilization Methods

• Ozone Gas ($O_3$):
  • Low-temperature method that generates ozone internally by converting oxygen ($O_2$) to ozone ($O_3$).
  • Destroys microbes through oxidation.
  • Cycle time: Approximately $60\,\text{min}$.
  • Leaves no chemical residue; compatible with select surgical metals.
  • Incompatible with natural rubber, latex, and long narrow lumens; corrodes select metals.
• Chlorine Dioxide Gas:
  • Formed by mixing chlorine gas with sodium chlorite; gas is evacuated at cycle completion.
  • Cycle duration: $2\text{--}8\,\text{hours}$.
  • Corrosive to certain metals; poor penetration through paper wrappings.

Sterilization Monitoring, Documentation, and Quality Assurance

• Quality Assurance (QA) Program:
  • Enforces facility policies, standard operating procedures, scheduled preventive equipment maintenance, and employee educational competency evaluations.
  • Fundamental rule: "If it was not documented, it did not happen."
• Package Labeling Requirements:
  • Every package processed must be labeled prior to sterilization using a dedicated label gun or automated barcode printer:
  • Date of sterilization (often formatted as Julian Date).
  • Sterilizer identification number.
  • Sterilization load/cycle number.
  • Name of the item or tray.
  • Assembler/technician identification code.
• Mechanical Monitoring:
  • Real-time continuous recording of physical cycle parameters via digital printouts, graphs, and pressure/temperature gauges.
  • Documented values include time, chamber temperature, pressure, gas concentration, and relative humidity.
  • The sterilizer operator must review, sign, and verify the physical printout at the end of each cycle before releasing the load.

Chemical Indicators and Classification Standards

• Purpose: Chemical indicators (CIs) contain sensitive thermochromic dyes that undergo a distinct visual color change when exposed to specific physical conditions. CIs demonstrate that an item was exposed to sterilizing parameters, but do not prove actual sterility.
• External Indicator Tape Color Changes:
  • Steam Tape: Tan tape with light diagonal stripes $\rightarrow$ stripes turn black.
  • Gas (EtO) Tape: Green tape with light stripes $\rightarrow$ stripes turn black.
  • STERRAD (HPGP) Tape: Tan tape with red lettering $\rightarrow$ lettering turns white.
• Chemical Indicator ISO 11140-1 Classes (Classes 1 through 6):
  • Class 1 (Process Indicators): External indicators (e.g., indicator tape, peel-pouch dots). Differentiates between processed and unprocessed packages; responds to a single variable.
  • Class 2 (Indicators for Specific Tests): Used for specialized diagnostic equipment testing (e.g., Bowie-Dick / DART air removal test packs).
  • Class 3 (Single-Variable Indicators): Responds to a single critical parameter (e.g., reaching a designated temperature threshold).
  • Class 4 (Multi-Variable Indicators): Responds to two or more critical parameters (e.g., temperature and sterilant exposure time).
  • Class 5 (Integrating Indicators / Integrators): Responds to all critical sterilization parameters across a defined range of cycles. Performance correlates directly with biological lethality.
  • Class 6 (Emulating Indicators): Cycle-specific indicators designed to react to all critical parameters of a specific, targeted sterilization cycle (e.g., $3.5\,\text{min}$ at $134^\circ\text{C}$).

Biological Indicator (BI) Monitoring and Protocols

• Definition: The most definitive, accurate method of monitoring sterilization effectiveness. A self-contained vial or strip containing a known population ($10^5$ to $10^6$) of highly resistant bacterial endospores.
• Microorganism Selection:
  • Geobacillus stearothermophilus: Used for Steam, Ozone, and Peracetic Acid (STERIS) processes. Requires incubation at $131^\circ\text{F}\text{--}140^\circ\text{F}$ ($55^\circ\text{C}\text{--}60^\circ\text{C}$).
  • Bacillus atropheus (formerly Bacillus subtilis): Used for Ethylene Oxide (EtO) gas and Hydrogen Peroxide Gas Plasma (HPGP) processes.
• Steam BI Challenge Testing Protocol:
  • Placed inside a standardized Process Challenge Device (PCD) / Test Pack.
  • Placed horizontally on the bottom rack over the front chamber drain (the coldest point and most difficult area to evacuate air in the sterilizer).

• Tested daily in facilities, and with every load containing implantable devices.
• Rapid-readout BIs allow incubation results within $24\,\text{min}$ for steam and $15\,\text{min}$ for STERRAD Velocity.
  • Interpretation of Results:
• Negative BI Result (Pass): No bacterial growth detected. Demonstrates that spores were destroyed; load is safe for release.
• Positive BI Result (Fail): Bacterial growth detected. Indicates sterilization failure.
• Mandatory Actions Upon Positive BI:
  1. Immediately recall all items processed in that sterilizer since the last successful negative BI.
  2. Remove the sterilizer from service and notify biomedical maintenance.
  3. Notify operating room personnel and attending surgeons if items from the load were used on patients.
  4. Re-test the sterilizer after mechanical inspection.
  • Control BI Vial: An unsterilized BI vial from the same manufacturer lot MUST be incubated alongside processed BIs. The control vial must test positive for bacterial growth to verify spore viability and incubator functionality.

Specialty Testing and Quality Control Procedures

• Scissor Sharpness Testing Standards:
  • Surgical scissors must be tested routinely for edge sharpness prior to packaging:
  • Scissors greater than $4.5\text{ inches}$ in length: Tested using Red test material (latex or nitrile sheet).
  • Scissors less than or equal to $4.5\text{ inches}$ in length: Tested using Yellow test material.
  • Scissors must cut cleanly through the testing material to the tip without snagging or pushing material.
• Damaged Instrument Containment:
  • Faulty or damaged instruments must be tagged out of service immediately using a bright orange plastic tag labeled "BROKEN - DO NOT USE", fastened with a tamper-evident cable tie.
• Loaner Instrument Tray Processing:
  • Vendor loaner trays brought into a facility require strict inventory and tracking workflows:
  • Must be accompanied by a standardized Loaner Trays Form and manufacturer Instructions for Use (IFU).
  • Tag numbers on loaner sheets must match tags on physical instrument trays and white label cards.
  • Must undergo complete cleaning, decontam inspection, assembly, packaging, and biological-monitored sterilization prior to surgical use.