MAUDE Adverse Event Report: BIO-RAD MEDICAL DIAGNOSTICS GMBH TANGO OPTIMO; AUTOMATED BLOOD BANK ANALYSER SYSTEM

Model Number 848900010

Device Problems False Negative Result (1225); False Positive Result (1227)

Patient Problem No Known Impact Or Consequence To Patient (2692)

Event Date 09/13/2018

Event Type  malfunction  

Manufacturer Narrative

This is our combined initial and final report on this incident.

Event Description

The customer reported a false negative result with erytypecell b on erytype when testing on tango optimo on (b)(6) 2018.Repeat testing of the sample on tango optimo and in the tube yielded a 3+ positive result.Due to the initial unclear complaint description of the customer it was not clear whether the false negative reaction occurred on the forward typing with erytype s abd+rev.A1, b or on the reverse typing with erytypecell a1&b.But upon request we were informed that the false negative result occurred with erytypecell b of erytypecell a1&b in the reverse typing on tango optimo.On (b)(6) 2018 the customer performed new tests of other patient samples and got one false negative result in reverse typing with reagent red blood cell a1 of erytypecell a1&b.The result was correctly positive in a repeat testing.On (b)(6) 2018 the customer observed the third event regarding incorrect results in reverse typing.An a positive patient sample yielded a 1+ positive reaction with erytypecell a1 and a negative reaction with erytypecell b.On (b)(6) 2018 the customer observed a false negative result of a patient sample with the blood group o in the reverse typing.In total customer reported false negative results of three different patient samples and a false positive result of one patient sample with erytypecell a1&b on tango optimo.The customer returned neither the supposedly defective product nor the patient samples that had caused false negative respectively false positive test results.Therefore our quality control (qc) laboratory tested their retention sample of erytypecell a1&b with different donor samples on erytype s abd+rev.A1, b on tango optimo.All positive and negative reactions were correct.We did not observe any false negative respectively false positive reaction.Testing by our quality control laboratory confirmed that the allegedly defective lot of erytypecell a1&b functions correctly.A review of the batch record documentation showed no irregularities which might have negatively affected the quality of the allegedly defective lot.The affected tango optimo was inspected by our field service engineers.The received databases and log files were analyzed for any issue relevant anomalies.End of august metrology was performed.The 8 channel turning valve was replaced due to grinding noise.Also a syringe anda valve were replaced.On 09/04/2018 the engineer replaced the wash manifold and cleaned the waste tubing.Further, needle, syringe and valve were replaced.Coordinates were checked and adjusted.But the issue re-occurred on 09/13.On 09/16 both pipettor needle adapters were replaced.Upon performance verification procedure the instrument was operating within specifications.Metrology was performed according to the checklist with passing requirements and qc.The instance did not re-occur since last service visit.

• Brand Name: TANGO OPTIMO
• Type of Device: AUTOMATED BLOOD BANK ANALYSER SYSTEM
• Manufacturer (Section D): BIO-RAD MEDICAL DIAGNOSTICS GMBH; industriestrasse 1; dreieich, hessen 63303 ; GM 63303
• Manufacturer (Section G): BIO-RAD MEDICAL DIAGNOSTICS GMBH; industriestrasse 1; dreieich, hessen 63303 ; GM 63303
• Manufacturer Contact: martina benkert ; industriestrasse 1; dreieich, hessen 63303 ; GM 63303
• MDR Report Key: 8000186
• MDR Text Key: 126375365
• Report Number: 9610824-2018-00073
• Device Sequence Number: 1
• Product Code: KSZ
• UDI-Device Identifier: 07611969961696
• UDI-Public: (01)07611969961696
• Combination Product (y/n): N
• Reporter Country Code: US
• PMA/PMN Number: BK080013
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: health professional,user faci
• Reporter Occupation: Other
• Type of Report: Initial
• Report Date: 10/24/2018

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
• Device Operator: Health Professional
• Device Model Number: 848900010
• Device Catalogue Number: 848 900 010
• Was Device Available for Evaluation?: Yes
• Initial Date Manufacturer Received: 09/13/2018
• Initial Date FDA Received: 10/24/2018
• Was Device Evaluated by Manufacturer?: Yes
• Is the Device Single Use?: No
• Is This a Reprocessed and Reused Single-Use Device?: No
• Type of Device Usage: Initial
• Patient Sequence Number: 1