|
(b)(4).The reported sheath valve leak was confirmed through evaluation of the returned sample, which included one sheath extension assembly and dilator.Visual inspection identified deformation at the sheath tip and an internal obstruction.The hemostasis valve seal appeared properly aligned.Functional testing showed the dilator was able to pass through the seal, revealing additional tears, with no other obvious defects observed.Initial flushing per the approved requirement was unsuccessful, and leakage was noted at the hemostasis valve when excessive syringe pressure was applied.After the dilator was used to remove blood clots from the sheath, flushing was repeated with no leak observed.Leak testing per the applicable internal functional requirement was initially successful with no leakage.However, upon repeat testing after dilator insertion, leakage was observed from the hemostasis valve.This is likely due to the dilator expanding or opening existing tears in the seal, allowing fluid to escape.Repeat testing with the dilator in place again resulted in leakage.Dimensional analysis showed the seal slit lengths were below specification limits.A review of device history records identified prior documented issues related to undersized seal slits for the same lot, consistent with the findings in this complaint.The undersized slits likely contributed to increased friction during dilator insertion, leading to additional tearing and subsequent leakage.The damage seen on the seal is consistent with this as the slits lengthened and new tears formed between them.Based on the investigation, it was determined that this damage is likely supplier related.Further investigation has been initiated under teleflex quality systems to evaluate this issue.
|