Legal guarantee in the European Union
Garanția legală: protecția oferită de garanția legală minimă de doi ani pentru bunurile vândute în Uniunea Europeană. Consumatorii își pot exercita drepturile dacă bunurile nu corespund descrierii sau nu funcționează cum a fost prevăzut; vânzătorul oferă repararea sau înlocuirea gratuită și, în unele cazuri, o reducere de preț sau rambursarea integrală. Contactați vânzătorul cât mai curând și furnizați o dovadă a achiziției. Mai multe informații: europa.eu/youreurope/garanții.
Swipe to read the full notification. More information: europa.eu/youreurope/garanții ↗
EN
My account
Favorites
You have no favorite products.
Prima Deals BookOra Website free Brands Guides Sell on Prima Shop Prima Help

Sterilization or Disinfection? Class B, N or S Autoclaves, Pouches, Indicators and Shelf Life in Clinics and Salons

24 October 2026The Prima Shop Team10 min read
Sterilization or Disinfection? Class B, N or S Autoclaves, Pouches, Indicators and Shelf Life in Clinics and Salons

A clean instrument is not a sterile instrument, and a disinfected one is not either. The difference matters for everything that cuts, pierces or touches blood: burs, curettes, forceps, scissors, needles, manicure and pedicure tools. A reprocessing mistake cannot be seen on the instrument, which is why sterilization is checked with indicators and documented.

This guide is based on the Technical Rules approved by Romanian Minister of Health Order 1761/2021, as amended in 2022, and on the European standard for small autoclaves, EN 13060. It explains what each term means, which autoclave cycle you need, how to pack, how to read indicators and how long an instrument stays sterile.

10⁻⁶log reductionof microorganisms, including spores: this is how the rules define sterilization.
2 monthsin a pouchhow long sterility is maintained in paper or sealed paper-plastic pouches, unless the manufacturer states otherwise.
18–22 °Cin storagewith 35–70% relative humidity, in a dedicated, restricted area.

Cleaning, disinfection, sterilization: the official definitions

The rules define each stage (Article 1). Cleaning removes soil, meaning organic and inorganic matter, and is the mandatory preliminary step. Disinfection destroys most microorganisms on any surface, including skin, and has three levels. Sterilization means a 10⁻⁶ log reduction of microorganisms, including bacterial spores.

ProcedureWhat it destroysWhat it does not destroy
Low-level disinfectionMost vegetative bacteria, some fungi and some virusesMycobacteria, spores, non-enveloped viruses, molds
Intermediate-level disinfectionVegetative bacteria, fungi, mycobacteria and virusesBacterial spores
High-level disinfectionVegetative bacteria, fungi, viruses, mycobacteria and most sporesSome bacterial spores; cannot replace sterilization
SterilizationMicroorganisms, including bacterial spores, with a 10⁻⁶ log reduction–

What must be sterilized: critical, semi-critical, non-critical

The choice between disinfection and sterilization depends on the instrument's risk level (Articles 11–12):

Critical sterilize

They come into contact with normally sterile tissue or penetrate it, including the vascular system. Examples in the rules: surgical instruments, critical dental instruments, needles and syringes, suture material, acupuncture needles.

Semi-critical at least high level

They touch intact mucous membranes and do not penetrate the skin barrier. Examples: flexible endoscopes used only for imaging, ear syringe tips, oxygen masks.

Non-critical at least low level

They touch only intact skin or rarely the patient. Examples: stethoscopes, blood pressure cuffs, electronic thermometers. They are cleaned and disinfected.

Dentistry separate guide

Dental instruments are classified according to a guide adopted by the Romanian College of Dentists and endorsed by the National Institute of Public Health.

And in a salon?The rules in Order 1761/2021 are written for public and private healthcare units. Their risk criterion is still useful to anyone who reprocesses instruments: cuticle nippers or a pedicure tool that can break the skin come into contact with blood. The exact requirements for authorizing a salon are set by the county public health directorate.

The reprocessing steps, in order

Reusable devices go through mandatory stages (Article 32), and everything to be sterilized is cleaned and disinfected first (Article 33).

  1. Pre-cleaning at the point of useRemove organic matter so it does not dry on the instrument, without saline or active chlorine solutions. It does not replace cleaning (Article 37).
  2. Manual or automated cleaningBy hand, following a written procedure, or in a washer-disinfector compliant with EN ISO 15883. Hard-to-reach areas are cleaned first by hand or, preferably, ultrasonically (Articles 34–35).
  3. Chemical or thermal disinfectionBefore any standardized sterilization process (Article 33).
  4. Visual inspection with a magnifying lampCheck that the instrument is clean and intact (Article 38).
  5. PackingThe instrument must be clean and dry (Article 39).
  6. SterilizationPressurized steam is the recommended method if the device can withstand it (Article 45).
  7. StorageIn a restricted area protected from insects and sunlight, at 18–22 °C and 35–70% humidity, on a first-in, first-out basis (Articles 51–52).
B
EN 13060, B, N, S cycles

The autoclave: what class B, N or S means

The rules require sterilization only with authorized, approved equipment that complies with EN 13060 for small autoclaves and EN 285 for large ones (Article 47). EN 13060, currently in its 2025 edition, applies to steam sterilizers with a chamber under 60 liters and distinguishes three cycle types: B, N and S. The description below follows NHS Scotland guidance SHTM 01-05, Part B.

CycleHow air is removedWhich loadsKeep in mind
NPassive displacement by steam, no vacuumSolid, unwrapped instrumentsnot for lumens or pouches
BA vacuum stage, with vacuum and pressure pulsesHollow instruments, air-retentive loads and packaged instrumentswrapped and hollow
SActive air removalOnly the loads specified by the autoclave manufacturerstrictly as instructed

A class B autoclave may also offer N or S cycles. For example, the product sheet of the Euronda E8 autoclave in our catalog lists five type B cycles, type N and S cycles and the Vacuum, Helix and Bowie-Dick test cycles. Reference parameters for saturated steam are 121–124 °C with a holding time of at least 15 minutes, or 134–137 °C with at least 3 minutes (SHTM 01-05, Table 7.1); the program for each load type is given in the equipment manual, which the rules require you to follow (Article 49). Do not overload the autoclave: steam must reach every item (Article 50).

What about dry heat sterilizers?

A dry heat sterilizer (in Romania often called a "pupinel") works with hot air. In healthcare units, the rules allow dry heat sterilization, in an oven or dry heat sterilizer, only in microbiology laboratories (Article 44(2)), and dry heat disinfection likewise only there (Article 8). For a medical or dental practice this leaves, in practice, pressurized steam, the method recommended by the rules (Article 45); hydrogen peroxide sterilization is intended for heat-sensitive devices (Article 46). If a salon uses a dry heat sterilizer, it needs consumables made for dry heat: the autoclave pouches in our catalog are indicated by the manufacturer for steam and ethylene oxide, and there are separate pouches and indicator tapes for dry heat.

Packing: pouches, reels, containers

Packaging materials must comply with EN 868 and EN ISO 11607 and may be wrapping paper, sealed or self-sealing paper-film pouches, paper bags and rigid reusable containers with filters (Article 41). Double wrapping is allowed only if sterilization is done in fractionated-vacuum autoclaves (Article 41¹). Metal drums with a sliding band whose openings are opened and closed by hand are prohibited (Article 42). Every pack is marked with the date and the cycle number; the rules allow labels applied with a labeling gun, so that you do not puncture the pouch with a pen (Article 65).

PackagingHow long it stays sterileCondition
Paper and sealed paper-plastic pouchesTwo months from sterilizationIntact packaging; a different period only if the manufacturer states it, under its conditions
Rigid reusable container with filterThe period stated by the manufacturerThe manufacturer's storage conditions
Any opened setOne use, for one patientKeeping opened sterile sets is prohibited

Source: Article 59 of the rules. A pack with damaged packaging is not used: the instruments go back to cleaning (Article 52).

Indicators: what each one shows and how often

IndicatorWhat it checksWhere and how often
PhysicalPressure, time, temperatureEvery cycle, recorded or printed and archived
Chemical type 1, processOnly exposure to the processOn every pack, pouch or container
Type 2, Bowie-DickResidual air and steam penetration, in pre-vacuum autoclavesDaily if you sterilize porous material; at least weekly for autoclaves that sterilize instruments
Type 2, HelixSteam penetration into hollow devicesEvery load containing instruments with lumens
Type 5, integratorAll parameters of a steam or ethylene oxide cycleIn every pack, checked on opening
Biological (ISO 11138)Destruction of test sporesDaily, in the first load, in sterilization departments and in autoclaves without automatic recording; in every load with implantable materials
How to read the indicators
  • A color change on the process indicator only identifies processed packs and does not guarantee correct sterilization.
  • If the integrator has not changed color, the material is considered unsterilized and is not used.
  • Results go into the sterilization log: date and device, contents and number of packs, load number, temperature and pressure, start and end time, indicator results and the signature of the person releasing the sterile material (Article 66).
Autoclave tests
PRIMA Bowie & Dick Tests for Autoclave Testing
PRIMA Bowie & Dick Tests for Autoclave Testing
PRIMA Bowie & Dick Tests for Autoclave Testing
(0)
in stock
1209Lei
excl. VAT: 9,99 Lei
PRIMA Autoclave Helix Test - Steam Sterilization Verification Device with Resistance Tube + 200 Chemical Indicator Strips
PRIMA Autoclave Helix Test - Steam Sterilization Verification Device with Resistance Tube + 200 Chemical Indicator Strips
PRIMA Autoclave Helix Test - Steam Sterilization Verification Device with Resistance Tube + 200 Chemical Indicator Strips
(0)
in stock
20569Lei
excl. VAT: 169,99 Lei

Common mistakes

  • Disinfecting critical instruments instead of sterilizing themHigh-level disinfection cannot substitute sterilization.
  • Sterilizing dirty or wet instrumentsCleaning and disinfection come first, and the instrument must be dry when packed.
  • Putting pouches into a class N autoclaveThe N cycle is designed for solid, unwrapped instruments.
  • Using autoclave pouches in a dry heat sterilizerEach method has its own packaging and indicators.
  • Relying only on the indicator tapeA process indicator shows that the pack went through a cycle, not that it is sterile.
  • Reprocessing single-use productsThe rules explicitly prohibit it (Article 27).

Autoclaves, pouches, indicators and sterilization tests

Sterilization equipment, autoclave pouches and reels, chemical and biological indicators, Bowie-Dick and Helix tests, in the Prima Shop sterilization category.

Frequently asked questions

Can high-level disinfection replace sterilization?

No. The rules approved by Order 1761/2021 state explicitly that high-level disinfection cannot substitute sterilization. Critical instruments, which penetrate tissue or come into contact with blood, must be sterilized.

How long does an instrument packed in a pouch stay sterile?

Two months from sterilization for paper and sealed paper-plastic pouches, provided the packaging stays intact. A different period applies only if the packaging manufacturer specifies it, under its conditions (Article 59).

Which autoclave class do I need for instruments in pouches?

A vacuum autoclave of type B, or type S if the autoclave manufacturer explicitly lists packaged loads. The N cycle is designed only for solid, unwrapped instruments.

Can I use a dry heat sterilizer in a medical or dental practice?

In healthcare units, dry heat sterilization, in an oven or dry heat sterilizer, is allowed only in microbiology laboratories (Article 44(2)). The method recommended by the rules is pressurized steam, if the instrument can withstand it (Article 45).

How often should I run the Bowie-Dick test?

Daily if you sterilize porous material, and at least weekly for autoclaves that sterilize instruments, according to the annex on sterilization control as amended in 2022. The Helix test is run with every load containing instruments with lumens.

If the indicator tape on the pouch has changed color, is the instrument sterile?

Not necessarily. A process indicator only shows that the pack went through a cycle. Correct sterilization is confirmed by the integrator inside the pack, the cycle parameters and, periodically, biological indicators.