The complainant indicated that the device will not be returned for evaluation; therefore, a failure analysis is not available, and we are not able to determine the relationship between this device and the cause for this event.As part of our manufacturing process, all device history records are reviewed and approved by quality, prior to release of product.If additional information or the sample is received, the investigation will be reopened and responded to accordingly.
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As a medical device manufacturer your feedback is an important part of our commitment to manufacturing and distributing high quality products.Below you will find our investigation results for the reported product complaint.The investigation found that there were no related issues recorded throughout the manufacturing and control processes.The manufacturing records, including autoclave documents, were reviewed for the reported lot and no related event occurred during the overall process for this lot.Also, each lot is released based on an acceptable quality limit (aql) inspection.The product was in conformance to specifications and was released for distribution meeting all established quality assurance acceptance levels.Two used empty syringes were returned to the manufacturing site for evaluation.A verification was done on both syringes: the plunger was slowly pulled to the end and then pushed to see if any variation was detected.Indeed, a difference can be felt around the 10ml mark of the label where the plunger seems to sit in that spot.The plunger needs to be pushed a little harder to get out of the 10ml mark, confirming the presence of a bulge.The syringes were then filled with water up to 10ml leaving air in the nose of the syringe.The air was pushed outside, but the plunger did not recede back in the syringe.The test was repeated a second time on the returned syringes with the same result.The reported phenomenon could not be confirmed.Following previous similar complaints, a supplier corrective action request (scar) was sent to the supplier of the syringes.The rubber tip is designed with a larger outside diameter than the syringe barrel internal diameter.This design is intentional and prevents any leakage during use while providing a good seal to maintain sterility of the finished product.This design causes the rubber tip to put pressure on the barrel walls.When the syringe goes through the autoclave process, heat is created which likely causes the syringe barrel wall to form over the rubber tip creating this bulge above the 10ml mark where the rubber tip resides.Depending on the actual dimensions of the rubber tip, barrel internal diameter and autoclave processing, the extent of bulge may vary.The bulge is found to be inherent to our sterilization process and therefore, it is not considered a deficiency.The root cause of the phenomenon reported in the complaint is due to our process that are within the aql.
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