HSPA Sterile Processing (CRCST) — All Questions

Which packaging is suitable for a dry heat cycle running at 320 degrees F?

• a.A rigid container with a paper filter set in its lid plate
• b.Aluminum foil or a metal container designed for dry heat✓
• c.Nonwoven polypropylene wrap applied in two bonded layers
• d.A paper and plastic peel pouch heat sealed along both ends

Dry heat runs at roughly 320 to 340 degrees F, far above what plastic film and paper tolerate, and it sterilizes by conducted heat rather than by a penetrating vapor, so the package may be impermeable. Aluminum foil and metal dry heat containers withstand the temperature and conduct heat into the load. The film of a peel pouch melts and its paper face scorches at those temperatures. Polypropylene wrap softens and deforms well below that point. A rigid container's gaskets, filters and valves are validated for steam, not for dry heat.AAMI ST40

A sales representative claims a wrap works in every sterilizer. What decides whether it may be used in the hydrogen peroxide unit?

• a.Whether the wrap is applied in two layers rather than one sheet
• b.Whether the FDA has cleared that wrap for that specific process✓
• c.Whether the wrap carries a printed Class 1 indicator on each sheet
• d.Whether the wrap's barrier grade matches the weight of the set

Packaging is a medical device. Its maker obtains FDA clearance for named sterilization methods and cycles, and the written instructions state which ones, so a wrap may be used only in a process it is cleared for no matter what a representative promises. A printed external indicator tells a user the pack was processed but says nothing about whether the material is compatible with the sterilant. Barrier grade matches a sheet to the size and weight of the set, which is a separate selection question. Layering changes barrier strength, not whether the material survives peroxide.FDA

Why is an oversized peel pouch the wrong package for a six-piece retractor set?

• a.Weight and shifting of the set stress the seals until they fail✓
• b.The film side blocks steam from reaching more than one item
• c.Peel pouches are cleared only for single-use disposable devices
• d.A pouch cannot hold the internal chemical indicator a set requires

Peel pouches are validated for light, low-profile contents, one instrument or a few small ones, that lie flat so the seals carry no load. A multi-instrument set shifts during handling, concentrates weight on a seal, and its tips and ratchets punch through the film, so heavy or bulky sets belong in a wrapped tray or a rigid container. Pouches are used for reusable devices every day, so a single-use limit is not the problem. Steam passes through the porous face and reaches everything inside a correctly filled pouch. Internal indicators are routinely placed inside pouches.AAMI ST79

For which load is a rigid sterilization container the best packaging choice?

• a.A single lightweight instrument needed for a clinic procedure
• b.A flexible ureteroscope processed in a peracetic acid machine
• c.A textile pack of gowns and towels opened onto a sterile field
• d.A heavy orthopedic set that is transported and handled often✓

A rigid container is a reusable sterilization and sterility maintenance system with a hard shell, so it protects a heavy, expensive set through repeated transport and stacking and removes the risk of a torn wrapper. A single small instrument is exactly what a peel pouch is designed for, and a container wastes chamber space on it. A device run in a liquid peracetic acid processor is processed wet and unwrapped in the machine's own tray and cannot be packaged at all. Textile packs need a permeable wrapped pack that dries; containers have density and drying limits that linen defeats.AAMI ST79

How does a bonded, simultaneous wrap differ from sequential wrapping?

• a.An inner layer stays with the item and serves as a sterile drape
• b.Two bonded layers of wrap are applied in a single wrapping step✓
• c.The two sheets are applied one after the other in opposing folds
• d.A single heavy layer replaces the need for two thicknesses of wrap

Sequential wrapping means wrapping the tray in one sheet and then wrapping that package again in a second sheet, two separate applications. A bonded or simultaneous wrap is two sheets joined at the edges by the manufacturer, so a single wrapping motion delivers the same two layers and the package is still opened as two layers at the field. It is not one heavier layer; the barrier claim rests on there being two. The inner wrapper is a sterility barrier, not a drape to be laid on a table. Applying two separate sheets one after the other is the definition of sequential wrapping.AAMI ST79

A technician wraps a tray in one layer, saying the wrap is a heavy grade. Is that acceptable?

• a.Only if that wrap is cleared by its maker for single-layer use✓
• b.Yes, a heavy grade sheet has twice the barrier of a light grade
• c.Only if a second sheet is added to the pack after the cycle ends
• d.No, two sequential sheets are required on every wrapped tray

Wrap grade describes barrier strength and the size and weight of set a sheet is rated to carry; it does not by itself authorize a single layer. Some wraps are cleared and labeled for single-layer use and others are not, so the manufacturer's written instructions decide. Doubling the grade is not the same as doubling the layers, and a heavy sheet used alone outside its clearance leaves an unvalidated barrier. A flat rule of two sheets on every tray is older practice that no longer fits wraps cleared as single layer. A sheet added after the cycle protects nothing, because the barrier has to be present during sterilization.AAMI ST79

A loaner set arrives in an unfamiliar vendor container with no written instructions for its filters and locks. What should the technician do?

• a.Run the container as received, since the vendor sterilized it once
• b.Wrap the set in two layers and run it on a routine steam cycle
• c.Consult the supervisor to get the vendor's written instructions✓
• d.Use the filters and lock that fit the department's own containers

A container system is validated as a unit with its own filters, gaskets, locks and cycle parameters, and none of that can be guessed at the bench. Without the manufacturer's instructions the department has no validated way to process the set, and getting them from the vendor is a supervisory and vendor-management task, which makes this one of the situations where escalating is the right move. Wrapping the set instead still leaves the devices' own required parameters unknown. Substituting the department's filters and lock into another maker's container voids its validation. Assuming a vendor-sterilized set is ready ignores the rule that loaners are cleaned and sterilized on arrival.Device IFU

In an envelope fold, in what order are the wrapper's corners brought over the tray?

• a.Far corner first, then the two side corners, then the near corner
• b.Far corner first, then the near corner, then the two side corners
• c.Near corner first, then the two side corners, then the far corner✓
• d.Both side corners first, then the near corner, then the far corner

The wrapper is laid diagonally with one corner pointing toward the technician. The corner nearest the technician is folded over the tray first, then the left and right corners, and the corner farthest away is brought over everything last and tucked, with its tip turned back as a tab. Because the last fold sits on top, the package opens in reverse and the person at the sterile field lifts the flap farthest from the body first. Beginning with the far corner, or with both sides, buries the wrong flap underneath and forces the opener to reach across exposed contents to finish.AAMI ST79

Which package is best suited to a square, or parallel, fold?

• a.A rigid container holding a set of orthopedic bone screws
• b.A small basin set that will be opened onto a Mayo stand
• c.A single ring-handled instrument going into a peel pouch
• d.A large flat linen pack that is opened on a back table✓

The square or parallel fold brings the wrapper's edges straight across the package, near edge up, far edge down and then the two sides, producing a rectangular pack that suits large, flat or bulky loads such as linen packs and full-size trays opened on a wide surface. The envelope or diagonal fold suits smaller items, such as a basin set opened on a small stand, because it opens into a compact sterile field. A single ring-handled instrument belongs in a pouch and is not wrapped. A rigid container is a sterility maintenance system in itself and takes no wrapper.AAMI ST79

Why is the last flap of a wrapper folded back on itself to leave a tab?

• a.It gives the opener a place to grasp without touching the inside✓
• b.It seals the last flap so the package needs no tape to stay shut
• c.It leaves a channel that lets steam reach the inner wrapper layer
• d.It marks the face of the pack where the load label must be placed

The turned-back tip is the cuff, or tab. The person opening the package grasps only that cuff, so fingers stay off the wrapper's inner surface and off the sterile contents, and the flap is drawn back under control. It is not a closure; indicator tape holds a wrapped package shut, and a pack with no tape also has no external chemical indicator. A deliberate channel is the opposite of what good wrapping technique produces, because a channel is an open route for contaminants. Labeling goes on the tape or on a label, and the cuff plays no part in deciding where.AAMI ST79

What is the risk when a wrapper is cinched down hard around a tray?

• a.The cuff releases and the package comes open in the dry phase
• b.The package becomes too heavy for the sterilizer's loading rack
• c.The sheet can tear and compression can slow steam penetration✓
• d.The internal indicator changes color before the exposure phase

A wrapper is applied snugly enough that the package holds its shape and can be handled, but it is not stretched tight. Over-tightening tears the sheet at the corners, compresses the contents so that air removal and steam contact are impeded, and pulls the folds out of line. Wrapping technique does not change the weight of a set, which is set by its contents. A chemical indicator responds to the conditions of the cycle, not to how hard a wrapper was pulled. A package that falls open in the chamber is the failure mode of loose wrapping, which leaves gaps and channels, rather than of tight wrapping.AAMI ST79

A circulator opens a wrapped tray onto a back table. Which sequence protects the contents?

• a.The near flap first, then the two side flaps, then the far flap
• b.Both side flaps first, then the far flap, and the near flap last
• c.The far flap first, then the two side flaps, then the near flap✓
• d.The far flap first, then the near flap, then the two side flaps

Opening reverses the order of wrapping. The flap farthest from the person was folded last, so it lies on top and comes off first; working far, then the sides, then the flap nearest the body keeps hands and sleeves from passing over contents that are already exposed, and the final flap is drawn back toward the opener. Starting with the near flap means reaching directly across the open package for every remaining fold. Starting with the sides does the same while the top flap still holds the wrapper shut. Taking the near flap second exposes the contents and then requires a reach across them.AAMI ST79

A technician runs out of indicator tape and closes a wrapped pack with plain office tape. Why is that unacceptable?

• a.Plain tape carries no lot number for the load's recall record
• b.Plain tape is not strong enough to hold the wrapper's folds shut
• c.Office tape adhesive melts in steam and stains the outer wrapper
• d.Nothing on the outside shows the pack went through a sterilizer✓

Sterilization tape is a Class 1 external, or process, indicator: its stripes change color on exposure so anyone can tell a processed package from an unprocessed one before it reaches the field. Plain tape leaves no such evidence, and a package with no external indicator cannot be released. Adhesive residue on a wrapper is a genuine nuisance but it is not the reason the practice is barred. Traceability of a load comes from the load control label, not from the tape. Holding strength is not the issue either, since the purpose of the tape is the color change rather than the closure.AAMI ST79

A sealed pouch has a wrinkle running across the seal, leaving an open channel. What should the technician do?

• a.Report the failed seal to the supervisor before doing anything else
• b.Cover the channel with a strip of sterilization indicator tape
• c.Press the wrinkled area through the sealer again to close it
• d.Open the pouch and reseal the item in a fresh pouch of that size✓

A seal is continuous, commonly at least a quarter inch wide, with no wrinkles, burns or gaps; a channel is an open path and the package has no intact sterile barrier. The technician's defined duty here needs no decision from anyone else: discard the defective pouch and repackage the item in a new one of the correct size. Escalating a routine repackage stalls the work and leaves a known-defective package sitting on the bench. Running a wrinkled seal through again sets a second seal on distorted film without removing the channel underneath. Tape is not a barrier and cannot repair a seal.AAMI ST79

The heat sealer fails its seal integrity test again after the technician makes the adjustment the manual specifies. What is the next step?

• a.Stop using the sealer and notify the supervisor of the failure✓
• b.Switch to self-seal pouches and leave the sealer set up for later
• c.Raise the seal temperature until the test strips pass the check
• d.Keep sealing and check every seal by hand as pouches come out

Seal integrity is verified each day the sealer is used, following the sealer manufacturer's instructions, and a machine that still fails after the correction in its own manual is equipment that needs service. It comes out of use and the failure is reported so it can be repaired and any affected packages reviewed, which is beyond what a technician can settle at the bench. Inspecting seals by hand cannot restore a validated seal and misses channels too fine to see. Pushing the temperature above the validated setting scorches film and produces seals that look sound and peel apart. Leaving a failing sealer powered up invites the next technician to use it.AAMI ST79

Which closure may be used on a peel pouch that is not heat sealed?

• a.A strip of sterilization indicator tape wrapped around the end
• b.The pouch's own adhesive strip, folded on the printed fold line✓
• c.A rubber band doubled tightly around the folded end of the pouch
• d.Two staples driven through the folded flap at either corner

A self-seal pouch closes with the adhesive strip built into it: peel the liner, fold along the printed line and press the full width firmly so the adhesive makes an unbroken bond. Every other closure listed defeats the barrier. Staples, pins and paper clips punch holes straight through the film, and each hole is a route for contamination. A rubber band crushes the package, leaves the folded end open and applies no seal at all. Tape wound around a pouch pinches the fold without sealing it and can also block the porous face the sterilant has to pass through.AAMI ST79

How much air should be pressed out of a peel pouch before it is sealed?

• a.Excess air only, leaving the pouch loose against the instrument✓
• b.Enough that the pouch stands on edge in the sterilizer's rack
• c.None, because trapped air carries steam around the instrument
• d.All of it, by rolling the pouch tightly toward the sealing end

Excess air is expelled so the pouch does not balloon and burst a seal during the vacuum and pressure swings of the cycle, but the pouch is not squeezed flat. Flattening presses film onto tips and ratchets, drives the item into the seal, and can tear the package or open a seal in the chamber, and rolling the pouch tight does exactly that. Air is not a carrier of steam; air is what has to be removed from the chamber before steam can contact surfaces. Standing pouches on edge describes how the rack is loaded, which is a loading question rather than a sealing one.AAMI ST79

A department double pouches small implants. Which practice is correct?

• a.The inner pouch is folded to fit and turned paper against plastic
• b.The inner pouch is trimmed so its seal clears the outer pouch seal
• c.The inner pouch is closed with tape and the outer one heat sealed
• d.The inner pouch stays unfolded and faces the same way as the outer✓

Double pouching is done only where the pouch manufacturer's instructions validate it, because a second layer is one more barrier the sterilant must cross. The inner pouch must fit inside the outer without being folded, since a fold traps air, blocks the sterilant and hides the indicator, and both pouches face the same direction, paper to paper and film to film, so the porous faces align and the inner indicator can be read through the film. Turning the inner pouch paper against plastic blocks that path entirely. Tape is not a validated closure on either layer. Cutting a pouch down destroys the validated seal and the barrier at the cut edge.AAMI ST79

How does a technician verify that a sheet of sterilization wrap has no holes before using it?

• a.Rub the sheet between gloved fingers to feel for thin spots
• b.Wipe the sheet with a damp cloth and watch for water passing
• c.Hold the sheet up to a light and look over its whole surface✓
• d.Weigh the sheet against a new one drawn from the same carton

Wrap is inspected on both sides before it is used, and the reliable way to find pinholes, tears and thin spots is to hold the sheet against a light source and scan the whole area, including the creases where sheets are handled most. Feeling the sheet finds only gross defects and drags fibers apart as it goes. Wetting a wrapper defeats the very barrier being checked and leaves moisture in the pack. Sheet weight varies within a lot and reveals nothing about holes. Any defective sheet is discarded, and the lot number is recorded when a carton yields repeated defects.AAMI ST79

During inspection, a wrap sheet from a newly opened carton shows a dried water stain across one corner. What is correct?

• a.Let the sheet air dry on the counter and inspect it again later
• b.Use the sheet as the inner layer, where the stain is protected
• c.Discard that sheet and check the rest of the carton as it is used✓
• d.Ask the supervisor whether a dried stain still counts as a defect

A water mark means the sheet's barrier was wet at some point, and moisture strike-through carries microorganisms across it, so the sheet is not used. That rule is settled, which makes this a duty the technician performs rather than a judgment to hand upward; referring a defect the standard already answers is a way of avoiding a defined task, though a carton full of stained sheets is worth flagging as a shipping or storage problem. Putting the stained sheet inside does not help, since the inner layer is a sterility barrier too. Drying restores nothing, because the barrier has already been penetrated.AAMI ST79

Inspection shows a dent along the sealing edge of a rigid container's lid. What should the technician do?

• a.Use it and lay an extra gasket strip along the dented edge
• b.Remove the container from use and report it to the supervisor✓
• c.Tap the dent flat with a mallet and return it to service
• d.Use it, since the latches still pull the lid onto the gasket

The lid-to-base seal depends on an undamaged sealing edge meeting an intact gasket, and a dent along that edge is a gap the gasket cannot close, so the container is no longer a sterility barrier. Container repair belongs to the manufacturer or an authorized service agent, so taking it out of use and reporting it is exactly right here; the technician cannot certify a repair. Adding gasket material is an unvalidated modification of a cleared device. Latches that close prove only that the latches work, not that the seal is continuous. Hammering the lid deforms the sealing surface further and voids the container's validation.AAMI ST79

A creased filter is already seated in a rigid container's lid, with no way to tell whether it has been used. What is the correct action?

• a.Check with the supervisor before changing the filter that is in place
• b.Fit a new filter of the type the container's instructions specify✓
• c.Flatten the filter, seat the retention plate and close the lid
• d.Use it and note the filter's condition on the load control label

Container filters are single use: one filter, one cycle, and a creased filter of unknown history is discarded. Fitting the correct new filter for that container is a routine part of the technician's own assembly duty, spelled out in the container's written instructions, so there is nothing here to refer upward and asking first only delays a decision the standard has already made. Flattening a crease leaves the fold line as a potential channel and does not make a used filter unused. Recording the defect on the label documents a package known to be defective instead of correcting it before the cycle.AAMI ST79

Which writing instrument is approved for marking a package before sterilization?

• a.A felt tip marker made for marking sterilization packaging✓
• b.A number two pencil, so the label can be corrected later
• c.A fine-point ballpoint pen kept at the assembly workstation
• d.A permanent marker with a chisel tip taken from the office

Approved markers are soft-tipped, non-bleeding, non-toxic markers sold for use on sterilization packaging: they mark without indenting or piercing the barrier, and the ink is stable through the cycle and does not migrate to the contents. A ballpoint pen presses a hard ball into film or paper and can perforate it outright. Pencil scores the surface, graphite rubs off in handling, and a mark that can be erased or altered defeats traceability. An office marker's tip and solvent were not evaluated for packaging, and its ink can bleed through the material or react in the cycle.AAMI ST79

Why are ballpoint pens and pencils prohibited for labeling sterile packages?

• a.Their marks cannot be read by the barcode scanner at the case cart
• b.Their ink reacts with the indicator stripes and turns them black
• c.Their marks fade under the ultraviolet light used in storage rooms
• d.The hard point can pierce the barrier and the mark is not stable✓

A pen or pencil point concentrates force on a tiny area and can perforate wrap, a pouch face or a label backing, and a hole in the barrier means the package is not sterile when it comes out of the chamber; graphite and ballpoint ink were also never evaluated for stability through a sterilization process and can smear or transfer to contents. Fading is not the concern, since packages are not stored under ultraviolet light. Indicator stripes are not turned black by pen ink, and writing over them is a placement error rather than a chemical reaction. Scanners read printed barcodes, and handwriting was never meant to be scanned.AAMI ST79

What does a barcode-based tracking system add to package labeling?

• a.It removes the need for an external chemical indicator on the pack
• b.It replaces the biological indicator required for an implant load
• c.It lets a package be released before the cycle printout is read
• d.It links each package to its load, assembler and cycle record✓

Electronic labeling prints a machine-readable label and stores the same data, so a package can be traced to the set, the technician who assembled it, the sterilizer, the cycle and the patient it was used on, which is what makes a recall fast and complete. It does not replace monitoring: an external indicator is still applied to every package so a user can see at a glance that it was processed. Biological monitoring of implant loads is a sterilization requirement that no software changes. And a load is released on its physical, chemical and biological results, not because a label has been scanned.AAMI ST79

On a paper-and-film peel pouch, where should the technician write?

• a.On the paper side, inside the seal next to the indicator print
• b.On either side, as long as a felt tip marker is the one used
• c.On the film side, outside the seal and clear of the contents✓
• d.On the paper side, where the ink is absorbed and will not run

Writing goes on the plastic film, in the margin outside the seal, where a marker cannot penetrate a porous surface and ink cannot wick through to the item inside. The paper face is the porous face the sterilant passes through; marking it separates the fibers, can block that path and can carry ink into the package. Writing inside the seal puts marks on the sterile side of the barrier and crowds the printed indicator, which has to stay readable. And no marker makes the paper face acceptable, because the restriction is about which surface is marked rather than about the pen.AAMI ST79

Where does the writing go when a wrapped tray must be identified?

• a.On the count sheet inside, which travels with the tray anyway
• b.Directly on the outer wrapper, in a corner away from the folds
• c.On the indicator tape beside its stripes, or on a package label✓
• d.Across the tape's indicator stripes, where it is easiest to read

Marks belong on the sterilization tape or on a printed label, and on the tape they go beside the stripes rather than over them, because ink covering the color-change area hides the very evidence the indicator exists to give. Writing directly on a wrapper is barred: marker pressure weakens or perforates the sheet and ink can bleed through the material to the contents, and a corner is no safer than the middle. The count sheet stays sealed inside the tray, so it cannot identify the package on a shelf, on a case cart or during a recall, which is what external labeling is for.AAMI ST79

Where does the identifying information go on a rigid sterilization container?

• a.On the label card held in the holder built into the container✓
• b.On the filter retention plate, visible through the vent holes
• c.On the container lid itself, in a permanent felt tip marker
• d.On the tamper-evident lock's plastic tab at each latch point

Rigid containers carry a card in a label holder so the identifying information travels with the package and is replaced each time the container is filled again. Writing on the container itself is permanent, is wrong the moment the container holds a different set, and the solvent can attack the anodized finish. A tamper-evident lock is a small consumable, and while some systems print a load label on the lock, the contents, load and destination information does not belong scrawled on a latch tab. The filter retention plate sits inside the sterile barrier and cannot be read or reached without opening the container.AAMI ST79

What do the parts of a load control number identify?

• a.The sterilizer, the chamber shelf position, and the load weight
• b.The department, the assembling technician, and the shelf life
• c.The surgical service, the case cart, and the date of the case
• d.The sterilizer used, the cycle number that day, and the date✓

A load control number is what makes a recall possible: it names the sterilizer, the cycle or load number run in that sterilizer that day, and the date, so any package on a shelf can be matched to one cycle record with its physical, chemical and biological results. The assembler's identity and the contents are recorded too, but they are separate label elements, and shelf life is not part of a load number in an event-related system. The surgical service and case cart say where a package is going, not how it was processed. Shelf position and weight are loading details that no load number tracks.AAMI ST79

A set is assembled two instruments short because both are out for repair. What does the technician do?

• a.Hold the set unpackaged until the repaired instruments return
• b.Substitute two similar instruments and label the set as complete
• c.Note the missing items on the label and in the tracking record✓
• d.Package the set and let the operating room find the shortage

The count sheet defines what a set should hold, and when an item is missing the package label and the tracking record say so, so the operating room learns of it before the case starts and the instrument can be followed out to repair and back. Substituting a similar instrument without documenting it puts an unexpected device on the field and corrupts the set's record. Holding an assembled set out of the sterilizer withholds a needed set over a shortage that is documented in seconds. Sending it out silently is how a case stops midway while someone hunts for an instrument that was never there.AAMI ST79

Besides the contents and the load control number, what belongs on a package label?

• a.The instrument count and the total weight of the assembled set
• b.The assembler's initials and where the package is to be stored✓
• c.The patient's name and the date of the scheduled procedure
• d.The washer-disinfector cycle the set was cleaned in that day

A label identifies the person who assembled and packaged the set, so a question about the pack can be traced to a technician and used for education, and it identifies the storage location or destination so the package reaches the right shelf or cart. Patient identifiers are protected information and do not belong on a package sitting on an open shelf; the link to a patient is made in the tracking record at the point of use. Cleaning cycle data lives in the washer's own record. Weight is verified against the set's limit during assembly but is not label information.AAMI ST79

Why is a package containing an implant flagged on its label?

• a.So the package is stored apart from the rest of the sterile stock
• b.So the load is moved to the front of the sterilizer's queue
• c.So the package is opened only by the vendor's representative
• d.So the load is held until the biological indicator has been read✓

Implant loads are monitored with a biological indicator in a process challenge device and are quarantined until that result is read and found negative, and the flag on the label is what tells sterile storage and the operating room that the package is not releasable yet. Turnaround priority may or may not apply to a given implant and has nothing to do with the flag. Once released, an implant is stored with the rest of the sterile stock under the same conditions. And a vendor representative does not open sterile packages; the flag is about release, not about who handles the set.AAMI ST79

Why is loaner instrumentation identified on the package label?

• a.So the set can be stored longer than the department's own trays
• b.So the set can be sterilized on the cycle the vendor states orally
• c.So the set can be released to the case without a cycle printout
• d.So the set can be tracked through processing and back to the vendor✓

Loaner sets belong to a vendor, arrive and leave on a schedule, and often carry unfamiliar devices with their own written instructions, so the label marks them for tracking through cleaning, assembly, sterilization, use and return, and keeps them from being absorbed into the department's own inventory. Marking a set as a loaner exempts it from nothing: it is released on the same monitoring results as any other load. Shelf life is event related and identical for every package. And cycle parameters come from the manufacturer's written instructions, not from what a representative says at the desk.AAMI ST79

Why is the intended sterilization method and cycle marked on a package?

• a.So the load record can be shortened to the cycle number alone
• b.So the operating room knows which indicator to look for inside
• c.So the sterile storage shelf can be rotated by processing method
• d.So a peroxide-only package is not loaded into a steam sterilizer✓

Packaging and devices are cleared for particular processes, and a set packaged for hydrogen peroxide or ethylene oxide is ruined, or the cycle aborted, if it is loaded into steam; marking the intended method and cycle on the package is the check that catches the error at the sterilizer door. Storage is rotated by date and by package integrity, not by which process was used. The internal indicator is selected by the assembler for the intended cycle, and the user simply verifies that it changed. And the marking shortens no record, since the load documentation still carries the full load control information.AAMI ST79