Device evaluated by mfr: returned product consisted of an eluvia self-expanding stent system.The outer sheath, tip, inner sheath and the remainder of the device were checked for damage.Visual examination revealed a kink on the outer sheath at the nosecone.Microscopic examination revealed no additional damages.The lock and pull rack are is no longer in the manufactured position.The stent appears to have been deployed and did not return for product analysis.Per product specification, a 0.035" test guide wire was inserted into the device and was unable to pass through.The device was x-rayed, and no abnormalities were noticed at the area where the wire had difficulty passing.Further functional testing of the device was completed by again inserting a 0.035" test guidewire into the device.With some force the guidewire was able to pass through.Resistance was still felt so the device was disassembled to further investigate.The handle was opened, and the clip was cut off from the inner liner.The kink at the nosecone also made the proximal inner and inner liner kinked.The proximal inner was unable to be moved because of the kink so the proximal inner and inner liner was cut distal of the kink.The test guidewire was inserted into the proximal inner to locate the area of resistance.Microscopic examination of the area showed that the inner liner was kinked.Inspection of the remainder of the device, revealed no other damage or irregularities.The eluvia dfu includes the following related to issue: "do not remove the thumbwheel lock prior to deployment.Premature removal of the thumbwheel lock may result in an unintended deployment of the stent." it appears possible that the reported use contrary to instructions in the dfu contributed to the reported inadvertent deployment.
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