(b)(4).The customer returned one arrow-raulerson syringe (ars) and lidstock for evaluation.Visual examination of the returned syringe did not reveal any defects or anomalies.A vacuum leak test was performed on the ars.With the plunger body at the bottom of the syringe, the tip of the ars was occluded and the plunger was pulled back until it stopped.With the tip of the ars still occluded, the plunger was released and it snapped back to its original position.The ars passes the test if the plunger returns to within 1 cc of its original position, therefore, the sample passed the functional inspection.The ars was used to draw water out of a lab measuring cup.No issues were identified.A device history record review was performed and no relevant findings were identified.The ifu provided with this kit instructs the user, "do not aspirate with guidewire in place or air will enter syringe." the customer reported issue of the ars leaking could not be confirmed during the sample investigation.Visual and functional inspections were performed and no issues were identified.A device history record review was performed and no relevant findings were identified.As no problem was found with the returned sample no further action will be taken.
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