MAUDE Adverse Event Report: SIEMENS HEALTHCARE DIAGNOTICS, INC ADVIA CENTAUR XP INTACT PARATHYROID HORMONE (PTH) ASSAY; IPTH IMMUNOASSAY

Model Number	N/A
Medical Device Problem Code	Adverse Event Without Identified Device or Use Problem (2993)
Health Effect - Clinical Code	No Known Impact Or Consequence To Patient (2692)
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
Siemens is investigating the elevated advia centaur xp pth patient result.The interpretation of results section of the instructions for use states: "results of this assay should always be interpreted in conjunction with the patient's medical history, clinical presentation, and other findings." mdr 1219913-2018-00079 was filed for a sample from the same patient tested in (b)(6) 2017 and mdr 1219913-2018-00081 was filed for a sample from the same patient tested in (b)(6) 2018.
Event or Problem Description
A falsely elevated advia centaur xp intact parathyroid hormone (pth) result compared to historical results was observed.The physician questioned the result.There are no reports that treatment was altered or prescribed or adverse health consequences due to the elevated advia centaur xp pth result.Mdr 1219913-2018-00079 was filed for a sample from the same patient tested in (b)(6) 2017 and mdr 1219913-2018-00081 was filed for a sample from the same patient tested in (b)(6) 2018.
Additional Manufacturer Narrative
Mdr was filed on february 15, 2018 reporting a falsely elevated advia centaur xp pth result compared to historical results.Mdr 1219913-2018-00079 was filed for a sample from the same patient tested in (b)(6) 2017 and mdr 1219913-2018-00081 was filed for a sample from the same patient tested in (b)(6) 2018.February 22, 2018 additional information.The customer provided the actual dates of testing as well as the calcium results for each sample.Old pth pth (pg/ml) ca (mg/dl) (b)(6) 2017, 129.6, 9.6, (b)(6) 2017, 193.3, 9.1, (b)(6) 2017, 144.6, 9.4, new pth, (b)(6) 2017, 347.7, 10.4, (b)(6) 2017, 455.3, 9.7, (b)(6) 2018, 500, 9.7.The customer confirmed that the samples were all serum samples and that there was no change in treatment due to the results or changes in treatment that could cause the difference in results.Siemens reviewed the in house data comparing the old pth assay with the new pth assay with concentrations similar to the samples from the patient in question at the customer site.Based on the in house data, this difference observed by the customer for this patient is not what is expected when comparing the old pth method with the new pth method.For example a patient evaluated on the old method was 209.16 pg/ml versus 205 pg/ml on the new method.Another patient sample was 189.67 pg/ml vs 183.15 pg/ml.There appears to be other contributing factors causing the falsely elevated results.Results from a dilution study performed by the customer on the sample are not available and heterophilic testing was not performed by the customer on the samples.Without having more information or the sample, siemens cannot determine the potential root cause of the falsely elevated values.Siemens cannot rule out a potential interference in the patient sample.The interferent may not necessarily be due to an interfering antibody but may be due to other exogenous interferences such as drugs, nutritional supplements and/or herbal medicine in the blood.The laboratory procedure generally used to identify the presence of interfering antibody is serial dilutions to demonstrate a nonlinear response.No additional testing can be performed since the samples are not available.Mdr 1219913-2018-00079 supplemental 1 was filed for a sample from the same patient tested in (b)(6) 2017 and mdr 1219913-2018-00081 supplemental 1 was filed for a sample from the same patient tested in (b)(6) 2018.

• Brand Name: ADVIA CENTAUR XP INTACT PARATHYROID HORMONE (PTH) ASSAY
• Common Device Name: IPTH IMMUNOASSAY
• Manufacturer (Section D): SIEMENS HEALTHCARE DIAGNOTICS, INC; 511 benedict avenue; tarrytown NY 10591 5097
• MDR Report Key: 7274760
• Report Number: 1219913-2018-00080
• Device Sequence Number: 10796940
• Product Code: CEW
• UDI-Device Identifier: 00630414592336
• UDI-Public: 00630414592336
• Combination Product (Y/N): N
• Initial Reporter Country: SP
• PMA/510(K) Number: K163658
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Reporter Type: Manufacturer
• Report Source: foreign,health professional,u
• Initial Reporter Occupation: Health Professional
• Remedial Action: Inspection
• Type of Report: Initial,Followup
• Report Date (Section B): 03/15/2018

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 Model Number: N/A
• Device Catalogue Number: 10699154
• Was Device Available for Evaluation?: No
• Was the Report Sent to FDA?: No
• Initial Date Received by Manufacturer: 01/26/2018
• Supplement Date Received by Manufacturer: 02/22/2018
• Initial Report FDA Received Date: 02/15/2018
• Supplement Report FDA Received Date: 03/15/2018
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Patient Sequence Number: 1