It was reported during a percutaneous nephrostolithotomy procedure for stone removal the coating was noted to be peeling off the product.Upon completion of the procedure, during check up, three small blue particles where seen inside the renal pelvis.The three small blue particles remain inside the renal pelvis.The patient did not require any additional procedures due to this occurrence.According to the initial reporter, the patient did not experience any adverse effects due to this occurrence.
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Investigation - evaluation: a review of the complaint history, device history record, specifications, quality control and visual inspection of the device was conducted during the investigation.The visual inspection of the device photo¿s reported that: a review of the supplied photo(s) reveals what appear to be areas where blue coating is sheared off.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.Investigation revealed that there were multiple nonconformances in the production process that were detected and scrapped in-house; however, this complaint is the first complaint from the field regarding this lot.A review of documentation revealed that in manufacturing the devices are 100% inspected for coating defects.Biocompatibility testing has been completed for the completed device.Risk assessment and escalation to review board determined that additional risk reduction was not required.A process change was previously initiated due to high occurrence rate of this failure mode and has now been implemented to improve the adherence of the ptfe coating to the wire guide.The complaint device was not produced via the improved process.Based on the information provided, the root cause of this complaint is determined to be manufacturing related and the appropriate personnel have been notified.We will continue to monitor for similar complaints.Per the quality engineering risk assessment no further action is required.
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