The autopulse platform (b)(4) was returned to zoll on (b)(6) 2015.Investigation results as follows: a visual inspection of the returned autopulse platform was performed and found that the battery lock was bent.Additionally, one screw was missing from the load plate and bottom covers.Note this physical damage can occur due to normal wear and tear and/or physical abuse.A review of the platform archive was performed and there were several user advisory (ua) 45 (shaft not at "home" position) occurred on (b)(6) 2015 but not on the reported event date of (b)(6)2015.The archive data showed that the platform was not used on the reported event date.During functional testing, the autopulse platform displayed ua 45 upon power up and the lifeband did not retract.Further investigation showed that the drive shaft clutch plate was sticky.The drive shaft was rotated back to the "home " position to clear the advisory message.After drive shaft rotate to home position, the platform was run for 10 minutes using lrtf (equivalent to 250 pound patient) with no user advisories occurring.Based on the visual inspection, the drive shaft was cleaned to remedy the reported complaint.Additionally, the damaged battery lock and missing hardware for the load plate cover were replaced.In summary, the customer's reported complaint of lifeband was confirmed during functional testing and was attribute to a sticky drive shaft.After cleaning the drive shaft, the autopulse passed all the tests and meet all the required specification.Note that user advisory error messages are designed into the platform when one of several conditions is detected.Ua 45 alerts the operator that the autopulse driveshaft is not at its home position when the platform was powered on.This user advisory will persist until the driveshaft is returned to its home position.Per the autopulse user guide instruct, to clear ua 45, the operator needs to pull up the lifeband until the chest bands are full extended.This action will move the driveshaft to its home position.
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