The customer's reported complaint of autopulse platform (sn (b)(4)) displayed user advisory (ua) 02 (compression tracking error) message was confirmed during archive review but not during functional testing.There were no device deficiencies found during evaluation of the returned platform that could have caused or contributed to the reported complaint.During visual inspection, load plate cover was noted damaged and the encoder drive shaft does not rotate smoothly, exhibits binding and resistance, unrelated to the reported complaint.The autopulse platform is a reusable device and was manufactured in 2011 and has exceeded its expected service life of 5 years.Therefore, this type of physical damage found during visual inspection is characteristic of normal wear and tear for the life of the device.In addition, the pdb (power distribution board) was replaced to current revision.Following the service and repair, the autopulse was tested functionally and passed successfully with no issue or faults observed.Review of the archive data indicated user advisory (ua) 02 (compression tracking error) message was recorded around the reported event date.Advisory (ua) 02 error message alerts the operator as the drive shaft rotates and shortens/tightens the lifeband (compresses the chest), the load sensors do not see the expected increase in load.This typically occurs if the patient is misaligned on the platform or the lifeband is opened or in the incorrect position during take up/compression.The load cell characterization test confirmed both load cell modules are functioning within the specification.As part of routine service, the platform was tested with large resuscitation testing fixture, (lrtf) equivalent to 250 pound patient and failed with user advisory (ua) 17 (max motor on time exceeded during active operation), unrelated to the reported complaint.Defective drive train motor was replaced to address the issue.Historical complaints were reviewed for service information related to the reported complaint and there was no previous history of complaints reported for autopulse platform sn (b)(4).
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