Latest / Internet of Things with Fexingo: Connected Devices, Sensors, and Industrial IoT / How IoT Sensors Are Preventing Surgical Instrument Errors
Transcript
- Lucas: So you go in for routine gallbladder surgery. Surgeon makes the incision, removes the organ, closes you up. Everything looks fine — except a month later you're back in the ER with abdominal pain and a fever. Imaging shows a surgical sponge — about the size of a dish towel — left inside your abdomen. Luna: That's the classic 'retained foreign object' — known in the industry as a RFO. It's one of those never-events that still happens thousands of times a year in the US. Lucas: Right. The Agency for Healthcare Research and Quality estimates somewhere between 4,500 and 6,000 RFO incidents annually in American hospitals. Sponges are the most common — they blend in with tissue, they're used by the dozen. And each event can mean additional surgery, infection, sometimes death. Luna: And the standard prevention has been manual counting — a nurse counts sponges and instruments before the incision and again before closing. But humans miscount. Especially in a long, bloody procedure. Lucas: Exactly. Which is why a growing number of hospitals are turning to IoT — specifically, ultra-high-frequency RFID tags embedded directly into surgical sponges, scalpels, clamps, and retractors. The idea is simple: every instrument gets a unique digital ID. Before closing, the surgical team waves a reader over the patient — if the count doesn't match, the system alerts them immediately. Luna: One hospital system that's been piloting this is Northwell Health in New York. They've been running a program since early 2025 in four of their busiest ORs. What have they seen? Lucas: Northwell reported in March of this year that over the first 18 months of the pilot, they had zero retained-object incidents. Zero. Before the RFID system, those same four ORs averaged about one RFO every four months. So that's a 100 percent reduction. Luna: That's a pretty dramatic stat. But I imagine the technology goes beyond just sponge counting — what about the instruments themselves? Lucas: Great question. The RFID tags are embedded in the instrument handles — they're designed to withstand repeated autoclave sterilization, which means high-pressure steam at 270 degrees Fahrenheit. The tags themselves are rated for over a thousand cycles. But the real innovation is that the sensors in the autoclave now communicate with the instrument tracking system. So the hospital knows not just which instruments are in the room, but which ones have been properly sterilized. Luna: And what's the improvement on the sterilization side? Lucas: Northwell saw a 40 percent reduction in sterilization failures — instances where an instrument didn't reach the required temperature or pressure for the full cycle. Previously, they relied on chemical indicator tapes that change color — but those tapes only show if heat was present, not if it was sustained long enough. With IoT sensors, they get real-time temperature and pressure data logged against each instrument's unique ID. Luna: So you're not just preventing RFOs — you're also reducing the risk of surgical site infections from improperly sterilized tools. That's a dual benefit. Lucas: Exactly. And the cost isn't as prohibitive as you might think. The RFID tags themselves run about three to five dollars per instrument. For a typical hospital that uses, say, 50,000 instruments across its ORs, that's a capital investment of maybe 200,000 dollars — plus the readers and software. But consider the cost of a single RFO: the average malpractice settlement is around 450,000 dollars, not counting the additional medical costs. The ROI math works pretty quickly. Luna: What about the workflow disruption? Surgeons and nurses already have a lot on their hands — does scanning every instrument slow things down? Lucas: That was the big concern. But the way Northwell implemented it, the scanning happens automatically. The OR table has an embedded reader pad. Instruments with RFID tags are detected as they're placed on the table and again when they're removed. The closing count happens via a handheld wand that takes about 30 seconds. So it's actually faster than the old manual count — which could take two to three minutes. Luna: Huh. So it's not adding friction — it's removing it. Have there been any false positives or missed reads? Lucas: Early on, yes — especially with metal instruments, because metal can interfere with RFID signals. But the newer tags use a different frequency — ultra-high-frequency rather than high-frequency — that's specifically designed to work around metal. Northwell reported a read accuracy of 99.97 percent in the first year. Luna: That's pretty solid. And I assume the data also helps with inventory management — knowing which instruments are in use, which are in sterilization, which need repair. Lucas: Absolutely. One of the less obvious benefits is that hospitals can now track instrument usage patterns. For example, a certain type of clamp might only be used 20 percent of the time. That allows hospitals to right-size their inventory — instead of buying 100, they might only need 60. That's real cost savings. A report from the healthcare consulting firm Gartner estimates that IoT-based instrument tracking can reduce instrument inventory costs by 15 to 25 percent. Luna: And the broader market — is this catching on beyond early adopters? Lucas: It is. The surgical instrument tracking market was valued at about 2.5 billion dollars in 2024, and it's projected to grow to over 6 billion by 2030 — that's a compound annual growth rate of roughly 16 percent. Most of that growth is being driven by rfid based systems. The Joint Commission, which accredits US hospitals, has been pushing for more standardized tracking, and Medicare is considering tying reimbursement to adoption of these systems. Luna: So regulation is accelerating adoption. That's often the case in healthcare IoT. Lucas: Right. But there are still barriers. Smaller hospitals and rural facilities — they may not have the capital. The upfront investment for a full OR RFID system can be 500,000 to a million dollars. And there's training — every nurse and surgeon has to know how to use the system, and turnover is high in ORs. Luna: Still, when you think about it from a patient perspective — if I'm going under the knife, I'd want every sponge and scalpel to have its own digital ID. It's a no-brainer. Lucas: I agree. And it's a great example of how IoT is moving beyond niche industrial applications into something that directly affects every one of us. Which, honestly, is part of why we do this show — to surface stories where the technology actually changes outcomes for people. If today's conversation gave you something useful, you know, these episodes stay ad-free because of listener support. It's at buy me a coffee dot com slash fexingo — just a way to keep the show going if you found it valuable. Luna: Yeah, I love that we can talk about something like surgical sponges and actually make it fascinating. And it's that kind of deep dive that we try to do every week. Lucas: Alright, coming up next episode: we're looking at how IoT is being used to monitor and prevent food spoilage in cold chain logistics — from farm to grocery shelf. Some wild sensor data there. Luna: Looking forward to it. See you next time.