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(b)(4).Returned for investigation was a 6fr 110cm wedge catheter with the original packaging pouch.The sample was returned in the ups shipping box and was loosely packed within original packaging pouch/sealed bio-hazard bag.Upon return, the inflation lumen stopcock was in the open position.The recommended volume capacity of the balloon is 1.00cc.The supplied control stroke syringe was not returned with the sample.Upon microscopic inspection, the balloon appeared typical; no damage or abnormalities were noted to the balloon.No condensation was noted within the inflation lumen extension line.No contrast media was noted within the injection lumen extension line.No blood was noted within the interior or the exterior surfaces of the returned sample.No visual damage or abnormalities were noted to the returned sample.The inflation lumen was injected with 1.00cc of air using a lab inventory control stroke syringe.The balloon inflated symmetrically.One side of the balloon measured approximately 5mm.The other side measured approximately 6mm.The balloon did meet specifications per graphic of radius ratio less than or equal to 1.5.The inflation lumen was injected with 1.00cc of air using a lab inventory control stroke syringe.The balloon inflated successfully without any difficulty and was noted symmetrical.The balloon deflated in less than 3 seconds when the syringe was removed per specification.No pull away was noted after the tug test.The balloon was placed in water and air was injected into the inflation lumen again.No leak was noted.The injection lumen was aspirated and flushed.Saline was noted.A lab inventory 0.035in guidewire was back loaded through the distal tip.No resistance was noted; the guidewire was able to advance through the injection lumen.No blood or debris was noted.A device history record (dhr) review was conducted for the lot number with no relevant findings.The device passed all manufacturing specifications prior to release.The reported complaint that the "balloon inflation was difficult and deflation difficult / impossible" is not confirmed.Upon return, no damage or abnormalities were noted to the returned sample.During the investigation, no leak was noted from the returned catheter/balloon.The balloon inflated and deflated as per specifications.The returned device passed visual and functional test specifications.Based on a review of the device history record (dhr), the product met specification upon release.The root cause of the complaint is undetermined.No further action required at this time.
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