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Tandem picks up FDA clearance for 7-day infusion set

August 19, 2025 By Sean Whooley

Tandem Diabetes Care SteadiSet infusion set with t_slim X2 and Mobi pumps
The t:slim X2 and Mobi pumps with the SteadiSet infusion set. [Image courtesy of Tandem Diabetes Care]
The FDA’s 510(k) database indicates that Tandem Diabetes Care (Nasdaq:TNDM) recently received clearance for an extended-wear infusion set.

Tandem’s Capillary Biomedical (CapBio) subsidiary develops the SteadiSet Infusion Set. The wearable infusion set delivers insulin from an insulin pump to the body. Tandem — one of the largest diabetes tech companies in the world — develops the t:slim X2 and Mobi insulin pump systems to work with the infusion set.

Initially, SteadiSet received FDA clearance in May. However, through CapBio, Tandem said it planned to submit a separate 510(k) submission to the FDA to extend the indicated use time to up to seven days. It didn’t expect to begin commercial activities for SteadiSet until after it receives clearance for the extended use time.

Now, the company has that clearance for the seven-day set. According to the database, it submitted for a 510(k) on June 17 and received the clearance on Aug. 6.

Read more about Tandem and the rest of the diabetes tech industry in our free Diabetes Technology Special Report.

SteadiSet features an integrated inserter with a hidden needle designed for one-handed insertion. It received clearance to deliver insulin for up to three days of use. Tandem/CapBio designed the set to provide adult patients with type 1 diabetes with continuous insulin delivery during the indicated use period.

Tandem Diabetes Care SteadiSet infusion set
The SteadiSet infusion set. [Image courtesy of Tandem Diabetes Care]
Tandem Director of Product Marketing Ben Mar told Drug Delivery Business News at ADA 2025 that the company intended to use its original submission and clearance to gain confidence in the extended-wear version of the set. It plans to commercialize the extended version.

“Essentially, these AID systems and the pumps are just amazing at providing benefits,” Mar said in Chicago in June. “But infusion sets, overall, if you’re not getting the insulin reliably in your body, then the benefits of these really aren’t there. We’re really excited to make some meaningful developments on the infusion set side.”

Filed Under: Diabetes, Drug-Device Combinations, Featured, Food & Drug Administration (FDA), Regulatory/Compliance, Technology Tagged With: capillarybiomedical, FDA, Tandem Diabetes Care

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About Sean Whooley

Sean Whooley is an associate editor who mainly produces work for MassDevice, Medical Design & Outsourcing and Drug Delivery Business News. He received a bachelor's degree in multiplatform journalism from the University of Maryland, College Park. You can connect with him on LinkedIn or email him at [email protected].

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