Qn#(b)(4).Returned for investigation was an autocat2 pcs assembly.Visual inspection of the pcs assembly was performed.A dried white substance was noted on the posterior side of the pcb.No other abnormalities were noted.The pcs assembly was installed into a known good lab inventory ac2 for functional testing.The pump started up successfully.Pumping was initiated.During purge cycle, the pump alarmed purge failure.Pumping was reinitiated, with the same result.The pcs assembly was removed from the pump.Each valve was connected to a 12v dc power supply to check proper function.V2, v3, and v4 responded properly to the 12v supplied with an audible click, indicating proper valve function.V1 did not respond properly.Visual inspection of the pcs assembly internal hardware was performed.Blood was noted inside valves v1 and v4.V4 had the most significant buildup of dried blood.V1 had a small amount of dried blood in the valve which caused it to stick.Upon disassembling and reassembling v1, the valve responded properly to the 12v supplied voltage, indicating the blood contamination in the valve caused the valve to not be able to open/close properly.A device history record (dhr) review was conducted for the lot number with no relevant findings.The device passed all manufacturing specifications prior to release.The reported complaint of purge failure alarms is confirmed.Dried blood was noted in several internal components and caused the v1 valve to not respond properly to the applied voltage.During the complaint investigation, the iabp alarmed purge failure.Based on a review of the device history record (dhr), the product met specification upon release; however, the received product did not meet specifications during the complaint investigation due to the dried blood buildup inside the pcs assembly.The root cause of how the blood entered the pcs assembly is undetermined.No further action required at this time.This will be monitored for any developing trends.Other remarks: n/a.Corrected data: n/a.
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