Qn#(b)(4) ez-io driver 9058 ((b)(6)) was returned for evaluation.Upon receipt, the driver was visually inspected.No obvious signs of damage were observed.When the trigger was pulled the driver was operable and a solid green led was displaying.A dimensional inspection was not required due to the nature of the complaint.The driver was then subjected to simulated sawbone insertions per driver ifu (8048a).This functional test is used to determine whether the returned device still has the capability to power a 45mm ez-io needle set into a medium and/or hard bone.The 45mm ez-io needle set is used because it represents the worst case scenario for io insertion.Two (2) sawbones with medium (50 lbs/ft3) and hard (105 lbs/ft3) hardness profiles with 3mm cortexes were used for the test.Each insertion was timed with a stopwatch while applying approximately 8 lbs.Of force on a weight scale.Approximately 5 to 8 lbs.Of force is necessary to penetrate bone.The driver successfully negotiated both the medium and hard saw bone insertion testing.The complaint cannot be confirmed.The driver was disassembled for further analysis.The eeprom data also revealed that there were 5 stall conditions.The needle set ifu (8087a) states, "if ez-io power driver stalls and ez-io needle set will not penetrate the bone, op erator may be applying too much downward pressure to penetrate bone".Therefore, the 5 stall conditions likely indicate that too much downward pressure was applied during those insertion attempts.Additionally, the customer report was reviewed as part of this inve stigation.Per the report, the customer admits to applying a large amount of pressure during insertion.This goes against the ifu statement listed above.The customer also admittedly is unaware of the manual insertion technique that can be applied.Per ifu 8087a, "note: in the event of an ez-io power driver failure, disconnect the ez-io power driver, grasp the ez-io needle set hub by hand and advance into the medullary space while twisting back and forth." therefore, based on the reported information and investigation data, "intentional user error - not per ifu" likely caused or contributed to this event.The manufacturing device history file was reviewed.No recorded results of manufacturing issues or anomalies were reported.Two ifus will be referenced for this investigation.The ez-io driver ifu states, "as with any emergency medical device carrying a backup is strongly advised protocol".A review of the device history record found that the driver passed all the release criteria.The device was released in 02/2019 and is approximately 4 years old.No corrective/preventative actions are required at this time as intentional user error - not per ifu likely caused or contributed to this event.The complaint cannot be confirmed.Functional testing found no operational issues with the device as the driver was able to negotiate both the meduim and hard sawbones during insertion testing.In-service (b)(4) has been requested.Teleflex will continue to monitor and trend on complaints of this nature.
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