Description of event according to initial reporter: on (b)(6) 2014: a female with pulmonary thromboembolism underwent ivc filter placement by right femoral approach.The sheath system and the filter introducer of the complaint product were advanced from right femoral vein and deployment of the filter was attempted.However, although the physician pulled the red hub backward enough to contact the pinvise, the legs of the filter would not expand and the filter could not be released.Therefore, he tried to retract the filter back into the sheath, but the secondary legs got deformed (pulled up to the filter hook) during that attempt and due to the deformation, when only 4/5 of the filter was pulled back into the sheath, the filter got stuck at the tip of the sheath and became impossible to withdraw back further.The physician pulled back the sheath to the common femoral vein under that condition (filter was stuck at the tip and 1/5 of the filter was still extending out of sheath) and tried to retrieve it out of the body, but as the patient complained pain, retrieval was given up.The sheath system and the filter introducer still with filter were remained in the body as they were determined to be retrieved by surgical operation the next day.On (b)(6) 2014: the sheath system and the filter introducer were retrieved successfully by surgical operation as planned.Although blood transfusion was conducted as the amount of bleeding after the operation was large, there seemed to be no threat to the patient's life.Patient outcome: on (b)(6) 2014: although monitoring is necessary, there seems to be no threat to the patient's life.
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