Single-Use Suction Cannulas and the Reprocessing Problem
Borescope studies have given sterile processing teams a closer look at what happens inside lumened instruments after reprocessing cycles. What they found in suction cannulas is changing the conversation in some ORs.
The Challenge of Cleaning Lumened Instruments
Suction cannulas are among the most frequently used instruments in the OR. They are also among the most difficult to clean. The narrow internal lumen — the channel through which fluids are suctioned during a case — creates a mechanical challenge that standard decontamination cycles were not necessarily designed to resolve.
Visual inspection at the instrument level rarely reveals what is inside the lumen. For years, the absence of visible soil on the exterior was treated as a reasonable proxy for instrument cleanliness. Direct lumen inspection, where it happened at all, depended on light and the naked eye — neither of which can reach far into a narrow channel.
Borescope technology changed that. By threading a small camera into the lumen, researchers could document what was actually present after reprocessing. The findings across multiple independent studies were consistent and difficult to dismiss.
What the Research Shows
Azizi et al. (2012) — AORN Journal
One of the most cited studies on suction tip cleanliness was published in the AORN Journal in 2012. Researchers inspected 144 neurosurgical suction tips that had been reprocessed and returned to service using standard protocols. Using borescope inspection, they identified visible soil — including tissue, blood, and organic debris — in every instrument examined. That figure includes instruments that had cleared the existing inspection and were considered patient-ready.
The study also evaluated the effect of repeated cleaning cycles on contaminated instruments. After one additional cleaning, 75% still showed visible debris. After a second cleaning cycle, 49% remained contaminated. After a third, 11% still showed residue. The data illustrated a diminishing-returns curve for reprocessing lumened instruments, and raised questions about what threshold of cleanliness was achievable through manual and automated reprocessing alone.
Beyond Endoscopes Pilot Study (2024) — AAMI / Biomedical Instrumentation & Technology
A pilot study published in Biomedical Instrumentation & Technology (AAMI) in 2024 extended lumen inspection research beyond endoscopes to a broader range of lumened surgical instruments. Approximately 94% of instruments inspected following standard reprocessing showed evidence of residual debris inside the lumen. The study reinforced that the challenge is not specific to one instrument category or one facility — it is structural, and it stems from the geometry of lumened devices.
Lumens 2.0 — Ofstead et al. (2025) — American Journal of Infection Control
The Lumens 2.0 study, published in the American Journal of Infection Control in 2025, provided updated data on residual contamination in lumened surgical instruments after reprocessing. The research confirmed that debris persistence in instrument lumens continues to present a challenge under real-world sterile processing conditions, even in facilities following current guidelines. The authors noted that standard quality checks were not reliably detecting the contamination that direct lumen inspection revealed.
Tosh et al. (2011) — Infection Control & Hospital Epidemiology
The stakes of instrument cleanliness failures extend beyond audit findings. A 2011 outbreak study published in Infection Control & Hospital Epidemiology documented seven patients who developed Pseudomonas aeruginosa infections linked to the reprocessing of arthroscopic shaver handpieces. The internal channels of the devices had not been adequately cleaned despite standard reprocessing. The outbreak led to an FDA safety communication on the reprocessing of instruments with complex internal geometries.
Suction cannulas share that geometry. They are narrow, lumened, and pass fluid during procedures — the same combination of features that made shaver handpieces difficult to clean reliably.
Why Suction Cannulas Are Particularly Difficult to Clean
Several physical factors combine to make suction cannulas resistant to standard cleaning protocols:
Lumen diameter. The internal channel of a suction cannula is narrow by design. Cleaning brushes may not reach the full depth or make effective contact with the lumen wall throughout.
Fluid dynamics. Because suction cannulas actively draw fluid during use, organic material — blood, tissue, irrigation fluid — is pulled into and through the lumen. Some of that material adheres to the inner wall and dries before the instrument reaches decontamination.
Material bonding. Dried organic material bonds more tenaciously to metal surfaces than fresh soil. The time between the end of a case and the start of the decontamination process affects how difficult that bond is to break.
Inspection limitations. Without a borescope or similar tool, the interior of a suction cannula lumen is effectively invisible. Standard inspection workflows depend on the exterior and on assumptions about what the cleaning cycle accomplished.
Where Single-Use Suction Cannulas Fit
Single-use suction cannulas remove the lumened instrument from the reprocessing cycle entirely. After one case, the instrument is discarded. There is no lumen to inspect, no reprocessing cycle to evaluate, no wear history to track, and no question about what might remain inside from a previous procedure.
That is not a claim about clinical outcomes — it is a description of how the workflow changes. The reprocessing burden associated with that instrument category is eliminated for facilities that convert to single-use for suction.
HNM Medical’s single-use suction cannulas are stainless steel instruments designed for OR use. They are engineered for balance and precision, and they can be shaped during a case to the surgeon’s preference. Because they are manufactured for single use, each cannula starts every case in the same condition. There is no reprocessing history, no cumulative wear, and no prior use.
For sterile processing teams managing high caseloads, instrument tracking, and increasing regulatory scrutiny around lumened device cleaning, single-use suction represents one option for reducing the complexity associated with a specific instrument category — without requiring changes to the broader reprocessing workflow for reusable instruments.
Frequently Asked Questions
Are single-use suction cannulas as durable as reusable ones during a case?
HNM Medical’s single-use suction cannulas are stainless steel instruments manufactured to OR-grade standards. They are designed to perform throughout a full case and can be bent to shape intraoperatively. The single-use designation refers to post-case disposal — not to reduced performance during the procedure.
Does switching to single-use suction require changes to our OR setup?
Single-use suction cannulas typically integrate into existing OR setups without workflow changes at the case level. The difference is in what happens after the case: the instrument is discarded rather than returned to SPD for reprocessing and tracking.
Can HNM Medical provide cross-reference information for our current suction tips?
Yes. HNM Medical offers a Cross Reference Tool to help facilities identify equivalent single-use options for their current reusable suction cannulas.
Where can I review the studies referenced in this article?
The studies referenced here are independently published peer-reviewed research. Several are linked from the HNM Medical Resources page, which includes access to the Azizi et al. AORN study, the pilot study on surgical instrument lumen inspection, and additional research on reprocessing challenges for lumened instruments.
Learn More or Request a Sample
If you are evaluating single-use suction cannulas for your facility, HNM Medical can provide product specifications, cross-reference information, and samples for trialing. Visit our Surgical Instruments page for product details, or contact us to connect with our team.
References
- Azizi A, et al. Uphill grime: cleaning challenges for neurosurgical suction tips. AORN Journal. 2012;95(2):200–207.
- Beyond Endoscopes pilot study: residual debris in lumened surgical instruments after reprocessing. Biomedical Instrumentation & Technology (AAMI). 2024;58(1):25–33.
- Ofstead CL, et al. Lumens 2.0: Residual contamination in lumened surgical instruments after reprocessing. American Journal of Infection Control. 2025.
- Tosh PK, et al. Pseudomonas aeruginosa surgical site infections associated with contaminated arthroscopic equipment. Infection Control & Hospital Epidemiology. 2011;32(4):347–352.
Related reading on the HNM Medical Resources page: “Pilot Study of Surgical Instrument Lumen Inspection,” “Unseen Threats of Cleaning Lumened Surgical Instruments,” “Process Improvement in Surgical Instrument Cleaning,” and “Cost Analysis of Surgical Instruments.”