The Impella 5.0 catheter is an intravascular microaxial blood pump that conveys up to 5.0 L/min of forward flow blood from the left ventricle to the aorta. The Worlds Smallest 5.0 L/min Heart Pump. It has 9 Fr catheter based platform. It is minimal bedside support instrument. It has 21 Fr micro axial pump. It delivers forward flow from the left ventricle to the aorta. Micro Axial Blood Pump. The Impella 5.0 pump goes through the ascending aorta, crosswise the valve and into the left ventricle. The Impella 5.0 can be inserted into the left ventricle via femoral cut down or through the axillary artery.