(b)(4).The actual sample was not returned; however, the customer returned four representative samples for analysis.Visual analysis of the representative samples did not reveal any defects or anomalies.In order to perform dimensional analysis on the returned catheters, each of the representative samples were opened.The catheters were measured and all met dimensional specifications.A lab inventory syringe was used to inject water through the representative catheters.No issues were identified.The reported issue of an occlusion could not be confirmed without the actual complaint sample returned.A device history record review was performed with no relevant findings to suggest a manufacturing related cause.The ifu provided with the kit informs the user, "indwelling catheter should be routinely inspected for desired flow rate, security of dressing, and possible migration.Do not use scissors to remove dressing to minimize the risk of cutting catheter".The ifu also states, "it is recommended to check patency of catheter at least every three hours by delivering a bolus of isotonic saline.It is recommended to use heparinized isotonic saline".The report of a blocked arterial catheter could not be confirmed through complaint investigation as the customer did not return the actual complaint sample, only representative samples.Visual analysis did not reveal any relevant defects or anomalies on any of the returned representative samples.The catheters also met all relevant dimensional and functional requirements, and a device history record review did not reveal any relevant findings.The root cause cannot be determined as the actual complaint sample was not returned for analysis.Teleflex will continue to monitor and trend for reports of this nature.
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