Description of event according to initial reporter: the sheath and dilator were inserted by jugular approach and advanced to the target site.A stopcock contained in the gunther set was connected to the hub and a syringe was attached to the stopcock.When the user pulled the plunger of the syringe to fill the sheath with blood, air was aspirated into the syringe.Though air was aspirated at every attempt, filter introducer was advanced into the sheath to perform filter placement.However because air was confirmed again, the physician decided to stop using the device and attempted to remove the filter introducer from the patient.Then, anchors of the filter legs were caught on the edge of the sheath.The sheath was not fully withdrawn but just up to the puncture site not to damage the puncture site with the exposed anchors and not to let the filter travel and be placed in undesired site.Then, the sheath outside the patient was cut off by the user near the point where the filter appeared to lodge.Since the filter became visible and touchable, the legs were closed by the user and the filter could be removed.After that, the remained section of the sheath was removed as well.Another device was used instead and the filter was placed with no air aspiration during the procedure.Patient outcome: the patient had a favorable outcome.
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