As reported, a smart control, iliac 9 mm x 40 mm vascular stent was automatically getting released and the stent was deployed further than intended position.Therefore, an unknown 8 mm x 60 mm stent was added and implanted.The smart stent was being implanted at the common iliac artery.The complaint device was deployed approximate 1 cm and final positioning was being adjusted.However, the stent was automatically getting released and the stent was deployed further than intended position.An unknown 6f short sheath was used.Other procedural details were requested but are unknown, unavailable, not answered, or not applicable.The stent remained implanted; therefore, it will not be returned for evaluation.
|
Complaint conclusion: as reported, a smart control, iliac 9 mm x 40 mm vascular stent was automatically getting released and the stent was deployed further than intended position.Therefore, an unknown 8 mm x 60 mm stent was added and implanted.The smart stent was being implanted at the common iliac artery.The complaint device was deployed approximate 1 cm and final positioning was being adjusted.However, the stent was automatically getting released and the stent was deployed further than intended position.An unknown 6f short sheath was used.Other procedural details were requested but are unknown, unavailable, not answered, or not applicable.The stent remained implanted; therefore, it will not be returned for evaluation.The reported event of ¿stent delivery system (sds)-deployment difficulty-premature/in patient¿ could not be confirmed as the device was not returned for analysis and procedural films of the reported event was not provided.The exact cause of the issue experienced could not be determined.Based on the information available for review, it is difficult to determine what factors may have contributed to the premature deployment of the stent reported.However, as 1cm of the stent was already deployed and the user was repositioning the device at the time of the issue, it is likely that procedural/handling factors (as the locking pin should be removed at this time) contributed to the reported event of the unintended deployment of the remainder of the stent.According to the instructions for use (ifu), it warns ¿the stent is not designed for repositioning or recapturing.Once the stent is partially deployed, it cannot be recaptured using the stent delivery system.¿ the ifu also instructs during stent deployment, ¿advance the stent delivery system past the lesion site.Pull back the stent delivery system until the radiopaque stent markers (leading and trailing ends) move in position so that they are proximal and distal to the lesion site.Ensure that the stent delivery system outside the patient remains flat and straight.Caution: slack in the catheter shaft either outside or inside the patient may result in deploying the stent beyond the lesion site.Verify that the delivery system¿s radiopaque stent markers (leading and trailing ends) are proximal and distal to the target lesion.Ensure that the introducer sheath does not move during deployment.Remove locking pin from handle.Initiate one-handed stent deployment by rotating the tuning dial with thumb and index fingers in a clockwise direction (direction of arrow) while holding the handle in a fixed position.While using fluoroscopy, maintain position of the radiopaque stent markers relative to the targeted lesion site.Watch for the distal radiopaque markers to begin separating.Separation of the distal stent markers signals that the stent is unsheathed.Continue turning the tuning dial until the distal end of the stent obtains full apposition with the vessel wall.Note: only the initial 40 mm of the stent may be unsheathed using the tuning dial.¿ based on the information available for review, there is no indication that the reported event could be related to the design or manufacturing process of the unit.Therefore, no corrective/preventative actions will be taken at this time.
|