According to the initial reporter, the doctor stated that the filter jumped out of the sheath.The doctor did not feel the tactile bump on the delivery system that should have alerted him to pause the advancement.The doctor tried to re-sheath the filter.The secondary legs were bent pointing toward the patient's head.The filter had not been released from the delivery system but could not be re-sheathed.They tried to retrieve it but could not get the clover snare to capture the hook.The doctor used grasper forceps to grasp the filter and advance a 16 fr sheath over the filter to retrieve it.As the sheath covered the secondary legs, the grasper released the filter and the sheath came off.The legs then straightened out to the normal position.The doctor proceeded to deploy the filter successfully.This problem did extend the time required to complete the procedure to around 4 hours.The rep was called in after the initial deployment attempt.
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