According to the initial reporter, after depressing the safety button and the blue button, it looked like the filter became disengaged from the hook.It looked like it was released.When the doctor tried to pull back on the sheath, the filter was not releasing from the delivery device.When they turned the delivery handle to make sure that it was disengaged from the hook, it caused the filter to significantly tilt in the vena cava.They went in and retrieved it with a clover snare.The procedure was successfully completed with another device from the same lot #.
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