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This is one of one final mdr report being submitted for this complaint with associated mfr# 2954740-2016-00234.Product returned very limited information was received.The unidentified microcatheter and the rotating hemostatic valve rhv) were not returned.Concerning cleanliness only, the microcoil system was returned in almost pristine condition.The system was either not used or was cleaned before being returned which may have produced further damage.It is also unknown if the device was improperly handled for returned packaging or was further manipulated and/or inspected post-procedurally.In addition, any trace or other evidence that may have been complaint related may have been altered or removed prior to being returned due to post-procedural handling, cleaning, and packaging.All location and measurement callouts are approximate and for reference only.As viewed through the returned packaging, unreported damage of the coil protruding through and entangling around the sheath was found.The coil protrudes at the distal tip of the skive.The proximal section of the coil was stretched.Note the protein adhering to the coil distal to the stretched section.There is mechanical sheath damage at the protrusion site that opened up the skive and allowed the coil to protrude through the damaged section.The v notch of the resheathing tool has been severely damaged.The locking mechanism has compression and stretching damage.No manufacturing defects were found.The complaint of the coil stretching is confirmed.Without out the identification of the microcatheter and due to unreported damage of the coil protruding outside the sheath and without any explanation of the circumstances of how and when the coil was stretched, the root cause of the coil stretching cannot be determined, however a possible contributing factor may have been due to the coil being temporarily anchored at an unknown location and source.In addition, without the identification or the return of the unknown microcatheter and the rhv used in the procedure, it cannot be determined if these components contributed to the complaint event.The v notch of the resheathing tool was severely damaged as was the locking mechanism.While this type of damage can contribute to the coil protruding outside the sheath it was also found that the resheathing tool damaged the skive at the protrusion site.This damage opened up the skive which allowed the coil to protrude outside the sheath which may have produced additional damage to the coil.For optimum product performance and to prevent potential complications, the instructions for use (ifu) recommends, ¿¿continue sliding the introducer tip until just before the tip reaches the distal end of the re sheathing tool, leaving approximately 1 inch of the unsheathed introducer sheath still visible¿¿ to prevent damage to the v notch, the locking mechanism, and possibly to the remainder of the unit including the coil, for optimum product performance and to prevent potential complications, the instructions for use (ifu) recommends, ¿hold the introducer sheath (loosely-looped) in the left hand.Keeping the introducer tip near the re-sheathing tool, grasp the distal end of the re-sheathing tool between your left thumb and forefinger.Grasp the clear tab near the end of the introducer sheath body with the thumb and forefinger of your other hand.Gently pull the clear tab of the introducer sheath out and away from the re sheathing tool at a 45-degree angle to unlock the microcoil.Continue to pull the tab until an additional 0.5 to 1.0 inches (1.3 to 2.5 cm) of the translucent material is exposed.Gently fold the translucent tab towards the distal end, and firmly grasp the distal end of the re sheathing tool and the translucent tab between your thumb and forefinger, as shown in figure 3¿¿ caution: if unusual friction is noticed during advancement or retraction of the microcoil system, verify the locking mechanism, or clear tab is unlocked and pulled out from the resheathing tool approximately 1in.(2-3cm).¿ a review of the manufacturing documentation associated with this lot presented no issues during the manufacturing or inspection process that can be related to the reported complaint.The complaint of the coil stretching is confirmed.The root cause of the coil stretching cannot be determined, however a possible contributing factor may have been due to the coil being temporarily anchored at an unknown location and source.Without return of concomitant products it cannot be determined if those components had any additional contributions to the complaint event.Additionally, review of this lot presented no issues during the manufacturing or inspection process that can be related to the reported complaint.Therefore, no corrective actions will be taken at this time.Device returned for evaluation.
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