The use-by date of a sterilized medical device depends on the package type, storage conditions, and handling. The ISPESL Linee Guida and UNI/TR 11408 set the criteria: paper-plastic pouches for ambulatory use (typically 30 days), double-wrapped packaging (up to 90 days), containers with indicators (variable per manufacturer). This guide describes the parameters to consider when setting a use-by date in your practice and how to document it traceably.
The sterilization use-by date is the maximum period during which a wrapped, sterilized instrument is considered sterile, provided the package remains intact and storage conditions are correct. After this date, the instrument must be reprocessed (rewrapped and resterilized) before use, even if the package looks intact.
Italy has no national rule that fixes exact periods — the use-by date depends on the package type, storage conditions, and the recommendations of the packaging-material manufacturer. The ISPESL Linee Guida 2010 and UNI/TR 11408:2011 however define operational criteria, and ASL inspectors use these indicative durations as a reference during inspections.
Single pouch (heat-sealed paper/plastic): typically 30 days under standard ambulatory conditions. This is the most common format in dental practices and tattoo studios. The seal must be continuous and free of folds — a defective seal voids sterility from day one.
Double wrapping (pouch within pouch): up to 90 days. Suited to instruments stored for longer periods or in less-controlled conditions. The outer pouch must be opened in a clean area.
Reusable rigid container (sterilization cassette with filter): up to 6 months if filters are in good condition and the container closes hermetically. Filters must be replaced per the manufacturer's instructions. The UNI EN 868 family of standards defines the requirements for terminally-sterilized medical-device packaging materials.
Medical-grade packaging with integrity indicator: up to 12 months according to the manufacturer's specifications. These packages are more common in hospitals than in private practices.
Sterilized instruments must be stored in a clean, dry, enclosed space protected from dust, direct sunlight, and humidity. Ambient temperature should not exceed 25°C and relative humidity should stay below 60%. Pouches must not be stacked under pressure or stored in open drawers or in heavy-traffic areas.
The FIFO principle (first in, first out) is essential: older pouches are used first. SecuSteri automatically calculates the use-by date for every pouch based on the sterilization date and the configured package type, producing labels with the date clearly visible.
Every sterilized pouch or container must carry, at a minimum: the sterilization date, the use-by date, the cycle number, identification of the contents, and a Class 1 process indicator (UNI EN ISO 11140-1, autoclave tape or chemical integrator). In dental practices, the ISPESL Linee Guida and UNI/TR 11408 require complete traceability — from instrument to patient.
For tattoo and piercing studios, regional laws (Lombardia L.R. 13/2021, Lazio L.R. 2/2021, Toscana L.R. 28/2004) require that the client be able to verify the instrument is sterilized and within its valid date. The package must be opened in front of the client.
An instrument whose use-by date has expired is not necessarily contaminated, but it can no longer be considered sterile with confidence. The protocol is clear: remove the instrument from the pouch, verify its condition, rewrap it in a new pouch, and run a new autoclave cycle. The expired pouch is discarded as ordinary waste (not healthcare waste, since the instrument was not used).
Using an instrument with an expired use-by date is a violation of the sterilization protocol. In an inspection, the presence of expired pouches in the active storage zone is a non-conformity frequently documented by ASL inspectors.
For more on the controls that verify sterilization effectiveness, see the biological-controls guide.
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