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(b)(4).Investigation - evaluation: a review of the complaint history, drawings, device history record, documentation, instructions for use (ifu), manufacturing instructions, specifications and quality control was conducted during the investigation.The complaint device was not returned therefore, no physical examinations could be performed; however, a document based investigation evaluation was performed.There is no evidence to suggest the product was not made to specifications.Review of device history record shows no nonconforming events which could contribute to this failure mode.It should be noted there were no other reported complaints for this lot number.Each device is shipped with instructions for use (ifu) which states the appropriate uses, contraindications, warnings and precautions, and proper usage procedures including proper inflation and deflation procedures.The ifu states: do not exceed rated burst pressure and do not use a power injector for balloon inflation or injection of contrast medium as rupture may occur.The ifu also states, if balloon pressure is lost and/or balloon rupture occurs, deflate balloon and remove balloon and sheath as a unit.The nominal inflation for this device is 8 atm and the rated burst pressure is 11 atm.The balloon was inflated within this range, therefore over-inflation is not suspected to have caused the balloon to burst.The description of the event states that the device was used in a "tortuous and severely calcified right external iliac artery (eia)".Calcifications can have unexpected sharp protrusions which can damage the balloon and contribute to burst or tear.Based on the information provided, no product returned and the results of our investigation, the most likely cause for this failure mode is patient anatomy.We will continue to monitor for similar complaints.Per the risk assessment no further action is required.
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