The autopulse platform (s/n (b)(4)) was returned to zoll on (b)(6) 2015.Investigation results as follows: visual inspection of the returned platform found no visible damage to the device.A review of the archive showed multiple user advisor 7 (discrepancy between load 1 and load 2 too large) errors on (b)(6) 2015 thus confirming the reported complaint.Functional testing was not performed due to the ua 7 upon power up.Based on the investigation, load cell 2 was replaced to remedy the ua 7.The observed sticky clutch plate was deburred, which resolved the issue.In summary the customer's reported complaint that the platform prompted ua 7 was confirmed during archive review, as well as in functional testing, when the platform displayed ua 7 upon power up.The root cause for the ua 7 was a defective load cell.The user advisories are designed into the autopulse platform.Ua 7 alerts the user that a misalignment or inappropriate movement of the patient or the lifeband has occurred.This condition is typically correctable by the operator.The platform passed all initial and final functional testing criteria.
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