One tracheostomy was returned for evaluation.Visual inspection found the device to have black contamination on the obturator and marks were found on the tube.The tube length and obturator protrusion were measured with a calibrated ruler; device met specification for both.During verification, 32 assemblies were taken out of production floor inventory and reviewed to see if they met the specifications accordingly.No discrepencies were found.Quality personnel perform an inspection to verify that the shaft is fully seated to connector, that there is no exposed wire in the shaft, as well as no lack of or excess adhesive.The reported complaint was unable to be confirmed, and the problem source was unalbe to be determined.
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