Date of event: unknown.The date received by manufacturer has been used for this field.Investigation: two (2) photos were returned for the investigation of this complaint.From the photo, it appeared that the packages had been subjected to a high temperature which causes the bottom web to shrink and become deformed near the end cap area of the vps part causing it to be force opened at the opening tab.5 actual samples were returned for the investigation of this complaint.The bottom web of the unit package had shrunk and become deformed near the end cap area of the vps part causing it to be force opened at the opening tab.Visual inspection was performed on the sealing features of the returned samples.Grid mark was observed on the bottom web.This shows that sealing process has been completed and the seal width is within specification.A review of the device history record revealed no irregularities during the manufacture of the reported lot numbers.A manufacturing review revealed no abnormalities with preventative maintenance, calibration, or equipment.There is no process in the manufacturing facility that could cause this nonconformance.Visual inspection was performed on the returned unit package.Grid mark was observed on the bottom web.This shows that sealing process has been completed and the seal width is within specification.There was 100% sorting done on sterile parts for this affected batch prior to shipment.Based on the above investigation result, the reported nonconformance occurred after the product was packed in our manufacturing and sterilization process.Therefore, the probable root cause could be due to temperature gradient experience by the product during handling (transportation, storage, loading and unloading, etc.).
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