MAUDE Adverse Event Report: SIEMENS HEALTHCARE DIAGNOSTICS, INC. ATELLICA IM PROLACTIN (PRL); PROLACTIN (PRL) IMMUNOASSAY,

Model Number N/A

Device Problem Low Test Results (2458)

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

Event Date 10/30/2020

Event Type  malfunction  

Manufacturer Narrative

The customer contacted the siemens customer care center (ccc) to report a discordant low atellica im prolactin (prl) result compared to higher results when the sample was diluted.Siemens is investigating.The instructions for use (ifu) states the following in the interpretation of results section: "results of this assay should always be interpreted in conjunction with the patient's medical history, clinical presentation, and other findings.".

Event Description

A false low atellica im prolactin (prl) result was obtained on a patient and the reported result was questioned by the physician(s).The customer performed repeat neat (undiluted) testing of the sample, resulting low.Further sample dilutions were performed and the prl results increased as the dilution factor increased.There are no reports that treatment was altered or prescribed or adverse health consequences due to the discordant, low atellica im prolactin (prl) result.

Manufacturer Narrative

Siemens filed mdr 1219913-2020-00592 initial report on 03-dec-2020 for falsely low atellica im prolactin (prl) results obtained on a patient sample.26-feb-2021.Additional information: siemens has completed the investigation.The customer observes discordant patient results on the atellica im prolactin (prl) assay upon dilution.The samples are being diluted both on-board (1:2, 1:5) and manually up to a factor of 1:1000.They have confirmed that manual dilutions are using the recommended diluent (multi diluent 1).The customer has no concerns with on-board dilutions, the higher manual dilutions are the concern because they show a progressive increase in prl value.Siemens has reviewed the raw relative light unit (rlu) data for the high dilutions and they are near a zero dose.The dose increase seen on the high dilutions could be caused by noise around the low end of the analytical measuring interval.The large dilution factors need to be used cautiously.There is the potential of reading below analytical sensitivity (on high dilutions) and when multiplied by the dilution factor it could cause the prl dose to show an increase.Siemens has provided the following guidance for when a hook effect is suspected; the sample should be serially diluted and the result of the most diluted sample that falls within the assay measuring range should be multiplied by the appropriate dilution factor to obtain the analytes correct concentration in the sample.With a true hook effect, the diluted sample (e.G.1:100 or 1:1000) should read much higher than the noise region of the analytical measuring range (amr).The customer's dilution recovery with lower dilution factors is acceptable.A potential product issue has not been identified and customer education has been provided.The assay is performing within specifications.No further evaluation of the device is required.In section h6, the investigation findings code and the investigation conclusion code were revised.

• Brand Name: ATELLICA IM PROLACTIN (PRL)
• Type of Device: PROLACTIN (PRL) IMMUNOASSAY,
• Manufacturer (Section D): SIEMENS HEALTHCARE DIAGNOSTICS, INC.; 511 benedict avenue; tarrytown NY 10591 5097
• MDR Report Key: 10946377
• MDR Text Key: 219537498
• Report Number: 1219913-2020-00592
• Device Sequence Number: 1
• Product Code: CFT
• UDI-Device Identifier: 00630414599731
• UDI-Public: 00630414599731
• Combination Product (y/n): N
• PMA/PMN Number: EXEMPT
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: foreign,health professional,u
• Type of Report: Initial,Followup
• Report Date: 03/22/2021

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Date FDA Received: 12/04/2020
• Is this an Adverse Event Report?: No
• Is this a Product Problem Report?: Yes
• Device Operator: Health Professional
• Device Expiration Date: 03/18/2021
• Device Model Number: N/A
• Device Catalogue Number: 10995655
• Device Lot Number: 183
• Was Device Available for Evaluation?: No
• Date Manufacturer Received: 02/26/2021
• Is This a Reprocessed and Reused Single-Use Device?: No
• Patient Sequence Number: 1