One bipolar pacing catheter with attached monoject 1.3 cc limited volume syringe was returned for evaluation.As received, an unknown brown material was observed from the balloon latex.The balloon inflated clear with 1.3 cc air and the balloon remained inflated for 5 minutes without leakage.No resistance was felt during injecting air.No visible damage or deterioration to the balloon latex and balloon windings was found.Eccentricity was measured 0.04" (rmax=0.23", rmin=0.19") and was found to be out of specification.Specification for eccentricity is 0.035" per procedure.No visible damage to the catheter body or returned syringe was found.The material was sent to chemistry for analysis.Ir spectrum of the unknown brownish material on the surface of the balloon showed similar absorption characteristic when compared to polydimethylsiloxane-like material (silicone).Balloon inflation test was performed using returned syringe with 1.3 cc air.Visual examination was performed under microscope at 20x magnification and with the unaided eye.Customer report of "the balloon seemed to have inflated eccentrically" was confirmed.An investigation has been initiated to consider any potential manufacturing factors that may have contributed to this complaint and implement any necessary corrective actions.Invasive procedures involve some patient risks.Although serious complications are relatively uncommon, the physician is advised, before deciding to insert or use the catheter, to consider the potential benefits in relation to the possible complications.The techniques for insertion, methods of using the catheter to obtain patient data information, and the occurrence of complications is well described in the literature.It is standard practice to inspect the catheter before use.The ifu states to flush the catheter lumens and check balloon integrity including major asymmetry and leaks.At this time, the comorbidities of the patient that may have contributed to the ventricular perforation are unknown as well as if user or procedural factors played a part.Complaint histories for all reported events are reviewed against trending control limits on a monthly basis, and any excursions above the control limits are assessed and documented as part of this monthly review.
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