Fig. 1

Computerized tomography image, schematic diagram, and nerve conduction study results. A computerized tomography image of the femoral artery and vein area, 2 weeks after extracorporeal membrane oxygenation (ECMO) cannula removal showing severe right leg swelling and intense residual thrombus within the femoral vein (a). Impaired conduction in the right femoral nerve conduction study is shown, compared with the left femoral nerve (b). A cross-sectional schematic image of the femoral area showing 1) external compression of the sheath within the vessels; and 2) severe generalized swelling of the right lower extremity causing compression to the femoral nerve (c). An illustration of arterial and venous sheaths of the ECMO inserted into the femoral and artery and vein, respectively, where large sheaths may cause external compression of the femoral nerve (d)