Sterile Processing Interview Questions

Sample Answer:

"The three main sterilization methods are steam sterilization (autoclaves), ethylene oxide (ETO) gas sterilization, and chemical sterilization using peracetic acid. Steam is the most common in hospitals. ETO is used for heat-sensitive materials like plastics and electronics. Chemical sterilization is used for specialized instruments. Each has specific parameters for time, temperature, and pressure to ensure effectiveness."

Sample Answer:

"A biological indicator contains bacterial spores that are the most difficult microorganisms to kill. By using biological indicators, we can validate that the sterilization process is actually killing all microorganisms, not just most of them. If the biological indicator shows growth after sterilization, it means the process failed and those instruments cannot be used. Chemical indicators show color change but only validate time and temperature, not actual sterilization."

Sample Answer:

"First, I receive the tray from the OR and visually inspect it for blood, debris, or damage. I separate the instruments and place them in the automated washer-decontaminator with appropriate detergent and cycle time based on the tray type. After the cycle completes, I manually dry all instruments thoroughly. Then I inspect each instrument under the light for any remaining soil—if present, I scrub manually. I check for sharp edges and ensure all instruments match the tray setup. Finally, I assemble the tray with the correct instruments, place indicators, wrap it appropriately, and label it with the date and time."

Interviewer appreciates: Detail, systematic approach, quality focus

Sample Answer:

"I would immediately report it to my supervisor and document it in our system. The instrument should be removed from the tray and quarantined. Depending on the facility's policy, it might be sent for repair, sharpening, or replaced entirely. We can't use damaged instruments because they may not function properly during surgery or could compromise sterility. Patient safety comes first, so I'd make sure the surgical staff knew a replacement was needed before the case began."

Sample Answer:

"Shelf life depends on how instruments are wrapped and stored. Typically, wrapped instruments in a closed cabinet can be considered sterile for 30 days. If stored in an open environment or exposed to moisture, shelf life is much shorter—sometimes 7 days. I track this by labeling each tray with the sterilization date and checking them during inventory rounds. Expired or questionable items are reprocessed. We use first-in, first-out rotation to prevent expired trays. Our facility uses [specific system/method], and I follow that protocol religiously."

Sample Answer:

"PSI stands for pounds per square inch—it's the measurement of pressure inside the autoclave during sterilization. Standard steam sterilization typically operates at 15-27 psi, depending on the temperature and cycle time needed. Higher pressure means higher temperature, which kills microorganisms faster. We monitor PSI during each cycle using gauges or digital displays. If PSI drops below the required level, it indicates a problem—the cycle fails and we must reprocess those items."

Sample Answer Framework (STAR Method):

Sample Answer:

"I stay calm and prioritize. First, I assess what trays are needed and their urgency. I might accelerate processing on certain items if safe to do so. I communicate with the OR team about realistic timelines and let them know what's being expedited. I maintain quality and safety standards—I won't cut corners even under pressure. If I need help, I ask my team or supervisor. Once the urgent items are complete, I tackle the backlog methodically. Pressure is part of healthcare, and I handle it by staying organized and focused on safety."

Sample Answer Framework:

"I had a coworker who was quick to criticize my work. Instead of getting defensive, I asked for specific feedback on how I could improve. We talked during a break, and I learned they were frustrated with workflow issues, not my performance. I listened, incorporated their suggestions, and we started collaborating on solutions. Within weeks, the tension eased and we became productive teammates. I learned that listening and showing willingness to improve goes a long way."

Sample Answer (Choose What Fits You):

Sample Answers (Pick One That's True):

• • "Detail orientation—I catch mistakes others miss and quality checks never show errors on my processed trays."
• • "Efficiency—I process high volume without sacrificing quality. My output exceeds daily targets consistently."
• • "Reliability—I show up on time, follow protocols exactly, and never cut corners. Teams depend on me."
• • "Teamwork—I help colleagues, train newer staff, and communicate proactively to prevent problems."

Sample Answer (Growth Mindset):

"I'd like to develop stronger knowledge of specialty equipment like [specific sterilizer/system]. I'm currently reading manuals and asking my supervisor for training opportunities. I also want to pursue my CIS certification within the next 2 years to specialize in high-complexity instrument sets. I'm committed to growing as an SPT."