A well-made stainless steel instrument can stay in service for many years, but only if it is reprocessed correctly after every use. Most instrument damage, such as stains, rust, stiff joints and blunt edges, is caused by how instruments are handled, cleaned and dried, not by the procedure itself. This guide to surgical instrument care walks through each step of the cycle and the habits that make instruments last.
Before you start
Always follow the manufacturer’s instructions for use (IFU) for each instrument, and your facility’s protocols and local guidance (for example AAMI ST79 in the United States). This guide explains the reasons behind the steps; it does not replace them.
1. Point of use: don’t let it dry#
Cleaning starts in the procedure room. Dried blood and tissue are much harder to remove, and blood contains chlorides that attack stainless steel.
- Wipe off visible soil during and right after the procedure with a sterile sponge moistened with sterile water.
- Never soak instruments in saline. Saline is a major cause of pitting and rust.
- Keep instruments moist until cleaning: cover them with a towel dampened with water, or use an enzymatic pre-cleaning spray or foam.
- Open hinged instruments, and separate sharps and delicate items from heavy ones.
- Transport them in a closed, labelled container to the decontamination area as soon as possible.
2. Cleaning: manual, ultrasonic or washer-disinfector#
An instrument cannot be sterilized if it is not clean. Soil left on the surface shields microorganisms from the sterilant.
Manual cleaning#
- Use a neutral-pH or enzymatic detergent made for medical instruments, diluted exactly as the label says.
- Clean under the surface of the water to avoid splashing and aerosols.
- Use soft nylon brushes. Never use steel wool, wire brushes or abrasive powders; they scratch the surface and remove its protective layer.
- Brush serrations, box locks and ratchets in the open position, and brush through lumens with a brush of the right diameter.
Ultrasonic cleaning#
Ultrasonic cleaners are excellent for joints, serrations and other places a brush cannot reach. Remove gross soil first, open all instruments, avoid overloading the basket, and change the solution regularly. Do not mix different metals in the same cycle, and keep in mind that some instruments (for example certain optics and powered devices) must not go in an ultrasonic bath.
Washer-disinfector#
Automated washer-disinfectors give the most consistent results. Load instruments open, on racks designed for them, so water jets reach every surface.
Rinse and dry#
Rinse thoroughly to remove all detergent. Use distilled, deionised or reverse-osmosis water for the final rinse; tap water leaves mineral spots. Then dry completely, with special attention to joints and lumens. Moisture left in a box lock is a common starting point for corrosion.
3. Inspection: catch problems early#
Inspect every instrument after cleaning, ideally under a lighted magnifier.
Inspection checklist
- No remaining blood, tissue or detergent, especially in serrations, box locks and ratchets.
- Jaws and tips align and meet correctly; teeth and serrations mesh.
- Box locks and joints move smoothly, without stiffness or cracks.
- Ratchets engage and hold.
- Scissors cut cleanly to the tips (many departments test them on a test material made for this purpose).
- No pitting, rust, chipped edges, bent tips or damaged insulation.
Take damaged instruments out of service and send them for repair or replacement. A worn instrument that is “still usable” can fail during surgery.
4. Lubrication#
Instruments with moving parts (scissors, forceps, needle holders, hemostats) should be lubricated after cleaning and before sterilization, using a water-soluble instrument lubricant (“instrument milk”) that is compatible with your sterilization method. Do not use mineral oil, silicone spray or household lubricants; they block steam from reaching the surface and trap residue.
5. Packaging#
- Package instruments in the open or unlocked position, at most on the first ratchet tooth.
- Protect sharp tips with tip guards that let the sterilant pass through.
- Place heavy instruments at the bottom of trays and delicate ones on top.
- Use the packaging system validated for your sterilizer: wraps, pouches or rigid containers.
6. Sterilization#
For heat- and moisture-stable stainless steel instruments, steam sterilization (autoclaving) is the standard method. Commonly used cycles include gravity-displacement cycles at 121 °C and pre-vacuum cycles at 132–135 °C. Exposure and drying times depend on the sterilizer, the load and the packaging, so use the parameters validated by the sterilizer manufacturer and stated in the instrument IFU.
- Use chemical indicators in every pack and biological indicators as your protocol requires.
- Do not overload the chamber; steam must circulate freely.
- Let the drying phase finish. Wet packs are not considered sterile, and moisture causes staining.
- Let packs cool on the rack before handling to avoid condensation.
Instruments that cannot tolerate steam need low-temperature methods (for example hydrogen peroxide gas plasma or ethylene oxide), as specified by their manufacturer.
7. Storage#
Store sterile packs in a clean, dry, temperature-controlled area, away from sinks, floors and outside walls. Handle packs as little as possible, and check them for damage or moisture before use.
8. Stains and rust: what they mean#
| What you see | Likely cause | What to do |
|---|---|---|
| Rust-coloured spots that leave a mark when wiped | Deposits from other rusty items or rusty pipes, or real corrosion | Find and remove the source; take corroded instruments out of service |
| Pitting, small holes in the surface | Chlorides (saline, blood, bleach) left on the steel | Stop saline soaks and bleach; rinse promptly. Pitted instruments cannot be repaired. |
| White or chalky spots | Minerals from tap water in rinsing or steam | Use treated water for the final rinse; check steam quality |
| Brown or orange film | Detergent residue or a detergent with the wrong pH | Use the correct detergent at the right dilution; rinse well |
| Blue-grey or black discolouration | Reaction with cleaning or cold-sterilization chemicals | Review chemicals and soak times |
| Rainbow-coloured film | Overheating, or heat on a residue film | Review cleaning and sterilizer temperatures |
9. Surgical instrument care habits that make instruments last#
- Use each instrument only for its intended purpose; scissors for tissue are not for cutting sutures or wire.
- Never let blood or saline dry on an instrument.
- Do not use bleach or chlorine products on stainless steel.
- Do not mix stainless steel with other metals in ultrasonic or soaking baths.
- Handle instruments in small groups, not piled in a basin.
- Have sharp instruments professionally sharpened and adjusted on a schedule.
Instruments built for repeated reprocessing#
Correct care makes a good instrument last for years, but it cannot make up for poor steel or skipped passivation. Gami Surgical manufactures surgical, dental and beauty instruments in Sialkot from medical-grade stainless steel, made to stand up to repeated cleaning and sterilization. Send us your list for specifications and a quote.
