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Manufacturing review: the device history records were reviewed with special attention to the raw materials, subassemblies, manufacturing process and quality control testing.This lot met all release criteria.There was nothing found to indicate there was a manufacturing related cause for this event.This is the only complaint reported to date for this lot number and failure mode.Visual/microscopic inspection: the balloon size for this product is printed on the balloon hub of the catheter and identified the returned sample as a 26 mm x 4.5 cm balloon.The balloon pleats were folded.Upon further inspection of the device, a complete circumferential break was noted to the outer catheter under the strain relief.It should be noted that the inner polyimide was not returned kinked, however, during evaluation it became kinked while handling the device.No other anomalies were noted to the catheter.Functional/performance evaluation: the patency of the guidewire lumen was tested using an in-house.035¿ guidewire and passed without issue.Further functional testing could not be completed due to the break in the catheter.Medical records review: medical records were not provided; therefore, a review could not be performed.Image/photo review: images/photos were not provided; therefore, a review could not be performed.Conclusion: a visual inspection found a completed circumferential break in the outer catheter under the strain relief.Further functional testing could not be completed due to the break.Therefore, the investigation is confirmed for a break in the catheter shaft, and is inconclusive for the deflation issue and aspiration issue, as the device was not able to be fully tested.It is possible that the break in the catheter shaft contributed to the aspiration and deflation issues.However, the definitive root cause for the reported and identified issues could not be determined based upon available information.It is unknown whether procedural issues during device preparation contributed to the event.Labeling review: the current instructions for use (ifu) states: warnings and precautions: never use force when advancing or retracting intravascular device without first angiographically determining cause for any resistance.Using force may damage catheter or cause injury to the patient (such as vessel perforation).Do not exceed maximum inflation pressure indicated on label.Excess inflation pressure can cause balloon rupture and the inability to withdraw catheter through introducer sheath.Withdrawing balloon through introducer sheath may damage balloon.Balloon deflation and catheter removal: deflate balloon by drawing vacuum on the = 50 cc inflation device.Use fluoroscopy to visually confirm that balloon has fully deflated prior to withdrawing catheter.While maintaining negative pressure and guidewire position, withdraw deflated device over the guidewire and out through introducer sheath.Use of a gentle clockwise twisting motion may be used to help withdraw balloon through introducer sheath.If unusual resistance is met when attempting to withdraw balloon, position balloon in anatomical position in which it can be inflated safely.Partially inflate balloon and then deflate it.Balloon re-folding can be observed under fluoroscopy.Use of recommended contrast concentration will facilitate fluoroscopic visualization of balloon re-folding.If balloon will not pass through introducer sheath for removal, remove balloon and sheath as a single unit.(b)(4).The information provided by bard represents all of the known information at this time.Despite good faith efforts to obtain additional information, the complainant / reporter was unable or unwilling to provide any further patient, product, or procedural details to bard.
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