The triple lumen catheter was returned for evaluation with the suture wing separated from the catheter hub.Sutures were attached to the suture wing.The hub and inner diameter of the suture wing showed no obvious defects.A supplier corrective action request (scar) was issued to the contract manufacturer.Dimensional measurements were taken of the returned sample.The notch depth of the hub and the suture wing inner id are in specification.These dimensions are what prevent the suture wing from separating from the hub.The operation to attach the suture wing to the hub is performed by hand.A small drop of silicone fluid is applied, and the suture wing is placed by pushing the wing onto the hub until it is properly seated in the correct position on the hub.The operator rotates the wing a few times to ensure that it turns freely on the hub.The operator wipes all excess silicone from the hub.An aql inspection is performed to verify the wing is applied to the hub securely, seated properly in the groove and rotates freely.During inspection no problems were found.The investigation concluded that the reported failure may have been caused by incorrect assembly of the suture wing to the hub due to operator error.Retraining of operators has been completed.Product design verification/ validation testing has been performed.Suture wing integrity was tested in accordance with en iso 10555-1:2013+a1:2017 intravascular catheters - sterile, single-use catheters part 1: annex b, and using the zwick tensile tester after transit conditioning and when processed through two (2) eo sterilization cycles.All samples tested in this protocol met the acceptance criteria for suture wing integrity.
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