MAUDE Adverse Event Report: ABBOTT DIABETES CARE INC LINGO GLUCOSE SYSTEM; N/A

Model Number	77263-01-0005
Medical Device Problem Code	Incorrect, Inadequate or Imprecise Result or Readings (1535)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	03/07/2026
Type of Reportable Event	Malfunction
Event or Problem Description
A customer reported receiving erroneous glucose results from an abbott diabetes care (adc) device.The customer received an adc device scan result of 40.0 mg/dl compared to reading of 150.0 mg/dl respectively obtained on an adc meter and the results, when plotted on a parkes error grid, fall into the c zone, showing the difference in values to be clinically significant.The length of sensor wear was unknown.There was no report of death, serious injury, or mistreatment associated with this event.
Additional Manufacturer Narrative
The product has been requested back for investigation and the customer agreed to return the device, however, at this time product has not yet been received.An investigation has been performed for the reported complaint, and it has been determined that there was no indication that the product did not meet specification.The dhrs (device history record) for the product were reviewed and the dhrs showed the product passed all tests prior to release.The most probable root causes associated with this failure mode are disconnected, faulty or damaged components, software/data corruption, or misuse.However, mitigations are in place to reduce and prevent such issues.All vital manufacturing steps are validated, monitored, and verified during manufacturing to ensure the system is in conformance with the verified design.All vital functions are monitored by the system and, when necessary, function is suspended to safeguard against inaccurate results.Labeling is provided to instruct the user on the intended use of all vital parts of the system to minimize misuse.All complaints and complaint trends are investigated to determine if there is a product defect/ deficiency.If a product defect/ deficiency is identified, a risk evaluation is completed and compared to the risk management report, to ensure the risk profile has not changed.Additionally, as a part of abbott¿s post-market surveillance process, all risk evaluations with associated complaint data are reviewed annually to determine if the risk profiles have changed as compared to the product risk management reports.These monitoring processes ensure that all product risk profiles remain acceptable and have a positive benefit/ risk ratio.If product is returned, a physical investigation will be performed per adc's established processes and procedures, and a report will be submitted upon completion of investigation.All pertinent information available to abbott diabetes care has been submitted.

• Brand Name: LINGO GLUCOSE SYSTEM
• Common Device Name: N/A
• Manufacturer (Section D): ABBOTT DIABETES CARE INC; 1360 south loop road; alameda CA 94502 7001
• Manufacturer Contact: patricia reis castro ; 1360 south loop road; alameda, CA 94502-7001 ; 4157205405
• MDR Report Key: 24795059
• Report Number: 2954323-2026-22597
• Device Sequence Number: 18617035
• Product Code: SAF
• UDI-Device Identifier: 00357599848002
• UDI-Public: (01)00357599848002(17)2026-08-31(10)KTP013824(91)77263-01-0005
• Combination Product (Y/N): N
• Initial Reporter State: FL
• Initial Reporter Country: US
• PMA/510(K) Number: K233655
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Consumer
• Initial Reporter Occupation: Non-Healthcare Professional
• Type of Report: Initial,Followup
• Report Date (Section B): 05/20/2026

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: No
• Is this a Product Problem Report?: Yes
• Operator of Device: Lay User/Patient
• Device Expiration Date: 08/31/2026
• Device Model Number: 77263-01-0005
• Was Device Available for Evaluation?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 03/07/2026
• Supplement Date Received by Manufacturer: 05/19/2026
• Initial Report FDA Received Date: 04/06/2026
• Supplement Report FDA Received Date: 05/20/2026
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Date Device Manufactured: 09/27/2025
• Is the Device Labeled for Single Use? (Y/N): Yes
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Patient Sequence Number: 1
• Patient Sex: Unknown