It was reported that the patient was diagnosed with pulmonary arterial hypertension in the course of chronic thromboembolism and narrowed pulmonary artery.A 5.0x15mm trek rx balloon dilatation catheter (bdc) was prepared per the instructions for use, and a 50/50 contrast mix was used, however, resistance was felt when removing the protective sheath.The bdc was advanced, and inflated once to 6 atmospheres.An attempt was made to deflate the balloon by pulling a negative for 50-60 seconds a few times, but failed.After several unsuccessful attempts the bdc was removed partially deflated, and resistance with the anatomy was felt.The bdc was removed as a unit with the introducer sheath, guide catheter, and bmw guide wire.The procedure was successfully completed, and the patient is okay.There were no adverse patient effects, and no clinically significant delay in the procedure.No additional information was provided.
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The device was returned for analysis.The reported deflation problem and the reported difficult to remove - guiding catheter were unable to be replicated in a testing environment due to the condition of the returned device.The reported difficult to remove - anatomy unable to be replicated in a testing environment as it was based on operational circumstances.The reported difficult to remove - protective sheath unable to be replicated in a testing environment as the sheath was not returned for analysis.A review of the lot history record identified no manufacturing nonconformities issued to the reported lot that would have contributed to this event.Additionally, a review of the complaint history did not indicate a lot specific quality issue.As there was no damage noted to the device during the inspection prior to use, the investigation determined the reported deflation problem, difficult to remove - guiding catheter and difficult to remove ¿ anatomy appear to be related to circumstances of the procedure as it is likely that manipulation of the device and/or interaction with other devices/anatomy resulted in the noted multiple outer member and inner member damages (stretched, collapsed); thereby reducing the inflation/deflation lumen thus resulting in the reported deflation problem, the reported difficult to remove - guiding catheter and the reported difficult to remove ¿ anatomy.The noted multiple bends and kink on the hypotube and the noted hypotube separation likely occurred due to handling or during packing for return analysis.Additionally, it is possible that inadvertent mishandling resulted in the reported difficult to remove - protective sheath; however this cannot be confirmed.The investigation determined a conclusive cause for the reported difficult to remove - protective sheath cannot be determined.There is no indication of a product quality issue with respect to manufacture, design or labeling.
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