MAUDE Adverse Event Report: SIEMENS HEALTHCARE DIAGNOSTICS, INC. ADVIA CENTAUR XP AFP; ALPHA-FETOPROTEIN (AFP) IMMUNOASSAY

Model Number N/A

Device Problem False Positive Result (1227)

Patient Problem No Clinical Signs, Symptoms or Conditions (4582)

Event Date 04/08/2021

Event Type  malfunction  

Manufacturer Narrative

Siemens healthcare diagnostics is investigating the cause of the discordant advia centaur xp afp result.The instructions for use (ifu) states the following, under warnings: "the advia centaur afp assay is not a screening test for cancer and must never be used as such.Afp testing is a safe and effective supplement to patient care when used as part of the overall management strategy for patients undergoing treatment for non-seminomatous testicular cancer or for patients being monitored after therapy is complete.Do not interpret serum afp as absolute evidence of the presence of malignant disease.At time of presentation, patients with confirmed non-seminomatous testicular cancer may have serum afp concentrations within the range observed in healthy individuals.Since elevated afp levels are often found in patients with other malignant and non-malignant conditions, the physician should rule out all other conditions associated with elevated afp levels prior to the use of the advia centaur afp values in non-seminomatous testicular cancer management.Conversely, low concentrations of afp are not necessarily indicative of absence of disease, particularly post-surgery or after chemotherapy.Testicular tumors that are histologically categorized as pure seminoma do not synthesize afp.The advia centaur afp assay, as a useful adjunct in cancer management, is intended for the evaluation of non-seminomatous testicular cancer, or mixed tumors with non-seminomatous elements, but not for pure seminoma.Additionally, several histologic subtypes of non-seminoma either do not synthesize afp (choriocarcinoma) or do so unpredictably (teratoma).Therefore, afp levels should be used concurrently with other diagnostic and clinical patient information.".

Event Description

A customer observed elevated advia centaur xp afp results for one patient which were discordant relative to repeat testing using the same method.The repeat-testing results were within the assay's reference range (<8.1 ng/ml).The lower results were considered consistent with the patient's clinical picture, and were reported to the physician.There are no allegations of patient harm or changes in treatment resulting from the discordant afp results.

Manufacturer Narrative

1219913-2021-00239 was submitted on 30-apr-2021 to report the observation of discordant, elevated advia centaur xp afp results.Siemens healthcare diagnostics has concluded the incident investigation.Customer and internal assay-performance data were reviewed; specifications were met, and there were no indications of similar issues.It was noted that the observations occurred when the advia centaur xp afp reagent pack was nearly empty, and the possibility of reagent clumping (aggregation) cannot be excluded.The customer did not retain the reagent pack for inspection.The customer has not reported any similar discordant result observations.Based on the investigation, no product problem was identified, and it was determined that the advia centaur xp afp assay is performing as intended.No further action is required.

• Brand Name: ADVIA CENTAUR XP AFP
• Type of Device: ALPHA-FETOPROTEIN (AFP) IMMUNOASSAY
• Manufacturer (Section D): SIEMENS HEALTHCARE DIAGNOSTICS, INC.; 511 benedict avenue; tarrytown NY 10591 5097
• MDR Report Key: 11754086
• MDR Text Key: 248272308
• Report Number: 1219913-2021-00239
• Device Sequence Number: 1
• Product Code: LOJ
• UDI-Device Identifier: 00630414177335
• UDI-Public: 00630414177335
• Combination Product (y/n): N
• PMA/PMN Number: K020806
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: foreign,user facility
• Type of Report: Initial,Followup
• Report Date: 06/07/2021

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Date FDA Received: 04/30/2021
• Is this an Adverse Event Report?: No
• Is this a Product Problem Report?: Yes
• Device Operator: Health Professional
• Device Expiration Date: 10/03/2021
• Device Model Number: N/A
• Device Catalogue Number: 10309980
• Device Lot Number: 231
• Was Device Available for Evaluation?: No
• Date Manufacturer Received: 05/27/2021
• Is This a Reprocessed and Reused Single-Use Device?: No
• Patient Sequence Number: 1
• Patient Age: 79 YR