MAUDE Adverse Event Report: SIEMENS HEALTHCARE DIAGNOSTICS INC. STRATUS CS

Catalog Number	10444834
Medical Device Problem Code	False Positive Result (1227)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	01/26/2026
Type of Reportable Event	Malfunction
Event or Problem Description
The customer reported that they received a false positive troponin (ctni) result compared to retesting on the same device and also their laboratory instrument.The controls were passing.There is no report of injury due to this event.
Additional Manufacturer Narrative
Siemens has requested instrument files for further investigation.Investigation will commence once requested data has been received.The cause of this event is unknown.
Additional Manufacturer Narrative
Siemens healthineers diagnostics has identified, through customer complaints, an increased occurrence of random non-repeatable false positive cardiac troponin (ctni) results at any point during the testpak¿s shelf life when using the stratus cs ctni acute care testpak.This means some ctni values for samples that are expected to fall within the 99th percentile of the reference population (per the instructions for use: 0.00 - 0.07 ng/ml [g/l]) may exceed this range.This issue can impact results.The stratus cs were confirmed to display false positive ctni results without alerting the user.The data revealed the maximum positive bias is 0.42 ng/ml with an average bias of 0.14 ng/ml when repeated on stratus scs platform.Siemens has released a field action (poc 25-006) "false positive ctni results for acute care ctni testpak" to inform customers of the issue and provide mitigation options.H6 c22: the issue was confirmed but the cause of the elevated rate of false positive ctni is unknown.

• Brand Name: STRATUS CS
• Common Device Name: STRATUS CS
• Manufacturer (Section D): SIEMENS HEALTHCARE DIAGNOSTICS INC.; 500 gbc drive; po box 6101; newark DE 19714
• Manufacturer (Section G): SIEMENS HEALTHCARE DIAGNOSTICS INC.; 62 flanders-bartley rd.; flanders NJ 07836
• Manufacturer Contact: felix akinrinola ; 333 coney street; walpole, MA 02032
• MDR Report Key: 24559427
• Report Number: 3002637618-2026-00014
• Device Sequence Number: 8860147
• Product Code: MMI
• UDI-Device Identifier: 00842768024863
• UDI-Public: (01)00842768024863
• Combination Product (Y/N): N
• Initial Reporter State: MO
• Initial Reporter Country: US
• PMA/510(K) Number: K051650
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: User Facility,Company Representative
• Initial Reporter Occupation: Other Health Care Professional
• Remedial Action: Notification
• Type of Report: Initial,Followup
• Report Date (Section B): 03/23/2026

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: Health Professional
• Device Catalogue Number: 10444834
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 02/11/2026
• Supplement Date Received by Manufacturer: 03/20/2026
• Initial Report FDA Received Date: 03/10/2026
• Supplement Report FDA Received Date: 03/23/2026
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Is the Device Labeled for Single Use? (Y/N): No
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Usage of Device: Reuse
• If action reported to FDA under 21 USC 360i(g), list FDA-assigned Recall Number or include a statement: 3002637618-03-31-2025-00
• Patient Sequence Number: 1
• Patient Sex: Unknown