MAUDE Adverse Event Report: ROCHE DIAGNOSTICS COAGUCHEK XS PT TEST 6 STRIP; PROTHROMBIN TIME TEST STRIPS

Catalog Number	04625374160
Medical Device Problem Code	Non Reproducible Results (4029)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	03/10/2026
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
The coaguchek vantus serial number is (b)(6).The product has not been received for further investigation at this time.If the product is returned in the future, a follow-up report will be submitted.On a regular basis, coaguchek strips of lots currently valid in the market are tested as part of routine retention testing and results have passed the internal inspection.Section e3: occupation is patient/consumer.
Event or Problem Description
There was an allegation of questionable results from a coaguchek vantus meter.At 3:58 pm, the meter result was 6.0 inr.At 4:00 pm, the meter result was 4.2 inr.The patient¿s therapeutic range is 2.0-3.0 inr.

• Brand Name: COAGUCHEK XS PT TEST 6 STRIP
• Common Device Name: PROTHROMBIN TIME TEST STRIPS
• Manufacturer (Section D): ROCHE DIAGNOSTICS; 9115 hague road; indianapolis IN 46250 0457
• Manufacturer (Section G): ROCHE DIAGNOSTICS GMBH; sandhofer strasse 116; mannheim (baden-wurttemberg) 68305 ; GM 68305
• Manufacturer Contact: natalie catton ; 9115 hague road; indianapolis, IN 46250
• MDR Report Key: 24932053
• Report Number: 1823260-2026-01513
• Device Sequence Number: 10667786
• Product Code: GJS
• UDI-Device Identifier: 00365702127104
• UDI-Public: 00365702127104
• Combination Product (Y/N): N
• Initial Reporter State: CA
• Initial Reporter Country: US
• PMA/510(K) Number: K170960
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: Consumer
• Initial Reporter Occupation: Non-Healthcare Professional
• Type of Report: Initial
• Report Date (Section B): 04/20/2026

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 Catalogue Number: 04625374160
• Device Lot Number: ASKU
• Was Device Available for Evaluation?: No
• Type of Report(Section G): Initial
• Initial Date Received by Manufacturer: 03/23/2026
• Initial Report FDA Received Date: 04/20/2026
• 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
• Patient Sequence Number: 1
• Concomitant Medical Products and Therapy/Usage Dates: ALBUTEROL.; ASPIRIN.; WARFARIN.
• Patient Age: 9 YR
• Patient Sex: Unknown
• Patient Weight: 35 KG