Validating a sterilizer isn't one-size-fits-all. Based on my experience as an office admin managing purchases across a hospital, a small clinic, and a biopharma lab—here's how to approach validation depending on your setup.

There's No Single 'Right Way' to Validate a Sterilizer

When I first started handling equipment purchases for our group—back in 2021—I thought validating a sterilizer was a straightforward checklist. Call the manufacturer, run a cycle, check the indicators, sign off. Simple, right?

Turned out, I was wrong. The how to validate a sterilizer question has about as many answers as there are types of sterilizers. And what works for a big hospital with a dedicated sterile processing department won't work for a dental office running one autoclave, or a lab that needs a glassware washer validated for pharmaceutical use.

After managing contracts for 400+ employees across three locations, and dealing with everything from a STERIS 5085 service manual to a benchtop dental sterilizer, I've learned that your validation approach depends almost entirely on three things:

• What type of sterilizer you're using
• Who regulates your industry
• How much risk is involved if a cycle fails

So let's break it down by scenario—because the right process for you isn't the same as the right process for everyone.

Scenario A: The Large Hospital / Surgical Center (High-Risk, High-Volume)

If you're managing a centralized sterile processing department with multiple steam sterilizers, washer disinfectors, and maybe even an ethylene oxide (EO) system, your validation has to be buttoned up tight. This is where I spent most of my early career, and honestly? The learning curve was steep.

What validation looks like here:

• Installation Qualification (IQ): Verifying the equipment was installed per manufacturer specs (e.g., steam supply pressure, water quality). You'll need the STERIS 5085 service manual PDF or equivalent documentation for every unit.
• Operational Qualification (OQ): Running empty and loaded cycles to confirm the sterilizer reaches the right temperature (e.g., 121°C or 134°C) for the right dwell time.
• Performance Qualification (PQ): Using biological indicators (BIs) and chemical indicators (CIs) to prove the cycle kills spores. Most facilities run three consecutive successful cycles before sign-off.

Real talk: The most frustrating part of this process is the paperwork. You'd think a centralized system would make documentation easier, but when you have 12 different sterilizers across three shifts, tracking every cycle by hand is a nightmare. We eventually switched to an automated system that logged everything electronically—saved our sterile processing team about 6 hours a week.

“When I took over purchasing in 2020, I inherited a vendor that couldn't provide proper IQ documents for their equipment. Finance rejected the expense report for the validation. I ate $2,400 out of the department budget. Now I verify documentation capability before ordering anything.”

For this scenario, your validation partner should be: The manufacturer (STERIS, Getinge, etc.) or a third-party validation service like BSI or Nelson Labs. Don't rely on your internal team alone—you need the documentation to pass regulatory audits.

Scenario B: The Small Clinic / Dental Office (Low-Risk, Low-Volume)

Now, let's flip to the other end. If you're running a dental practice or a small clinic with one or two autoclaves—maybe a dental X-ray machine and a benchtop sterilizer—your validation doesn't need to be as elaborate. But it still has to be done.

Here's where I see most small practices make mistakes: they think “it's just a small autoclave, it can't fail.” But I've seen a dental office get flagged by their state health department because they couldn't prove their sterilizer was validated.

What validation looks like here:

• Manufacturer's instructions are your best friend. Most modern dental sterilizers (like those from Tuttnauer or Midmark) come with a validation protocol in the manual. Follow it exactly.
• Run a biological indicator every week. It's cheap—about $2-5 per test—and gives you proof that your cycles are working. I recommend using a mail-in spore testing service if you don't want to handle the culturing yourself.
• Keep a simple logbook. Date, cycle type, load contents, temperature, pressure, BI result. That's it. It doesn't need to be fancy, but it needs to be consistent.

I once had a small dental practice client ask me if they could “just skip” the validation step because they were too busy. I showed them the cost of a failed health inspection: $1,500 in fines plus the cost of a mandatory re-training course. Suddenly, the $50 for a spore test didn't seem like such a big deal.

For this scenario, your validation partner should be: The manufacturer's customer support line (they usually have a validation specialist you can call), or a local medical equipment technician who offers validation services. Don't overpay for a third-party consultant—you don't need a 50-page IQ/OQ/PQ report for a benchtop autoclave.

Scenario C: The Biopharma Lab / Research Facility (Specific Requirements)

This is where things get interesting. If you're running a STERIS glassware washer or a steam sterilizer for pharmaceutical manufacturing, you're in a different world. Your validation isn't just about sterilization—it's about cleaning, drying, and ensuring no residues are left behind that could contaminate your experiments or products.

I worked with a biopharma client that had a fleet of STERIS glassware washers. They were validating each machine for cleaning efficacy, not just sterilization. That meant testing for detergent residues, organic residues (proteins, lipids), and even microbial contamination after cycles.

What validation looks like here:

• Use a validated cleaning protocol. Most manufacturers provide a validated cycle for specific load types (e.g., glass beakers, pipette tips, stainless steel instruments). Don't deviate from it without re-validation.
• Run recovery studies. Contaminate test coupons with a known amount of residue (e.g., bovine serum albumin), run them through a cleaning cycle, and measure how much is removed. Industry standard is typically >99% removal.
• Document, document, document. You need a written protocol, executed records, and a final report. This is not optional—FDA auditors will ask for it.

A cautionary tale: A client once saved $200 by skipping the validation of a new glassware washer. They assumed it was “just a dishwasher.” Three months later, their research team found that residual detergent was killing cell cultures. The cost of the redo: $4,000 in lost reagents and labor. Plus the reputation hit when the PI found out.

For this scenario, your validation partner should be: The manufacturer's technical services team (e.g., STERIS has a dedicated validation group for pharma customers) or a specialized validation engineering firm. Don't cut corners here—the cost of failure is too high.

How to Figure Out Which Scenario You're In

If you're still unsure which approach fits your situation, ask yourself these three questions:

1. What's the worst that happens if a cycle fails? If it's a patient infection or a product recall, you need full IQ/OQ/PQ. If it's a minor inconvenience, a simple logbook may be enough.
2. Who's watching? If you're regulated by JCAHO, FDA, or a state health department, you need formal documentation. If you're internal (e.g., just your own lab standards), you have more flexibility.
3. How many sterilizers do you have? One or two? The manufacturer's manual is probably sufficient. Ten or more? Invest in a validation management system.

There's a right way for your situation—but there's no single way that fits all. I've made the mistake of assuming otherwise, and it cost me time, money, and a fair bit of embarrassment. Take the time to figure out where you land, and validate accordingly.

Saved $80 by skipping expedited validation documents from the manufacturer. Ended up spending $400 on a rush redo when a regulatory inspector showed up unannounced. Net loss: $320, plus a lot of stress.

By the way, if you're managing something like a mobility scooter or other non-sterile equipment, you don't need validation at all—just maintenance records. But that's a story for another article.