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The service visit at methodist hospital - omaha was scheduled per capa-21-014 within work order wo-00199593.During the site visit, the hybridization (hyb) heater required recalibration due to failing initial verification at setpoint 2.Field quality updated risk assessment question 2 to 'yes' since the setpoint temperature failed outside the accepted limits established by the verigene i assay temperature tolerance guard band risk report (03838).Data review.Per the verigene assay temperature tolerance (guard-band) study report (03768),the study evaluated assay performance of verigene® rp flex, ep, cdf, bc-gp and bc-gn assays at varying critical temperature parameters and established a functional range of temperature for assay tolerance above and below the nominal set points.It was determined within 03838, that the hyb heater has an upper and lower tolerance of +/-2 degree celsius from the setpoint temperature 1 (38.5c) and setpoint 2 (90c).In reviewing the attached naplogs, setpoint 1 for the hyb heater was within the acceptable temperature range verification testing.Per the verigene processor sp system design fmea (napiii-fmea-1729), the system will monitor temperature throughout the procedure.Once at temperature, the system must maintain the target temperature within +/- 1c, or the system will alarm and terminate the procedure via the hardware/software.However, setpoint 2 had an adjusted temperature of +92.3c, 0.3c higher than the acceptable range per 03838.Due to this finding, risk assessment question 2 was updated to 'yes'.Site performance.The customer site is currently running bc-gp and bc-gn verigene assays.A review of associated complaint cases shows a single reported false result reported for this sp processor in the past 18 months.Compliant case (b)(6) was reported on (b)(6) 2020 for a false positive oxa and kpc resistance marker on the bc-gn assay.Through investigation, it was found that these false-positive results were likely caused by non-specific binding on the test substrate's microarray.This case is associated with escalation case (b)(6), mdr-22-038, and recall investigation rc-20-017.Because of these reasons, it is not believed that the false-positive result is associated with the hybridization heater's performance and instead linked to the investigation ongoing under capa lmnx-20-017.Conclusion.Through investigation into sp processor s/n 20133004 and its associated false result reported complaint cases there is no indication of this verification failure resulting in an adverse effect to patient results.
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