ClearanceBrief
Recall Z-1519-2025 ยท QFG Alternate Controller Enabled Insulin Infusion Pump

Tandem Diabetes Care, Inc.

t:slim X2 Insulin Pump with Interoperable Technology

DateApr 11, 2025 (initiated Feb 27, 2025)
StatusOpen, Classified
ReasonA software defect in Version 7.9 of the pump software for Tandem t:slim X2 and Tandem Mobi pumps, when used with Control IQ+ technology, will cause the pump to incorrectly interpolate glucose trends when the Estimated Glucose Value (EGV) is above 255 mg/dL at the start or end of a gap in data collection due to a lapse in connection from a paired continuous glucose monitor (CGM) sensor, which can lead to under-delivery or over-delivery of insulin based on inaccurate result leading to severe cases of hypoglycemia or hyperglycemia.
Root causeSoftware Design Change
ActionOn February 28, 2025 Tandem Diabetes Care contacted each affected customer by phone concerning a Urgent Medical Device Correction. On March 11, 2025, Tandem followed up with a "Urgent Medical Device" Recall notification via E-Mail to affected consignees. Tandem ask consignees to take the following action: 1. Turn off Control-IQ+ immediately. You may continue to use your pump without Control-IQ active. Your pump will deliver insulin based on your programmed active personal profile and will not automatically adjust insulin delivery. 2. Please refer to the user guide provided with your pump
Quantity63 units
DistributionUS: AZ, CA, CO, CT, FL, HI, IA, ID, IL, IN, MD, ME, MI, MO, MS, NC, ND, NE, NJ, NM, NV, NY, OH, PA, TX, UT, VA, WA, WI OUS: N/A
FDA recordOpen on fda.gov

510(k) clearances named in this recall

K232380t:slim X2 Insulin Pump with Interoperable Technology
Tandem Diabetes Care, Inc., Nov 3, 2023