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An occlusive large bore sheath is a frequently encountered situation in cases of cardiogenic shock (CS) requiring mechanical circulatory support (MCS). Resultant acute limb ischemia could be a catastrophic complication which significantly affects the prognosis of an already sick patient population. A novel, yet simple, technique using the radial artery, instead of the ipsilateral or contralateral common femoral artery (CFA), as a donor vessel of an external bypass which provides antegrade perfusion to a limb with an occlusive large bore sheath is hereby described. Radial access (RA) has been shown to improve mortality in acute coronary syndrome; however, it is sometimes avoided by some operators in CS cases due to the possible appropriate need for MCS. This technique offers a substitution of a second CFA access for a RA in order to provide adequate ipsilateral limb perfusion. Hence, one can start a CS case with a default RA and perform peripheral angiography after diagnostic cardiac catheterization. If the peripheral vasculature is inappropriate for MCS, the patient would have already benefited from the mortality advantage of RA. If obstructive PAD is absent, then an occlusive Impella sheath can be placed in a CFA after antegrade ipsilateral superficial femoral artery (SFA) access is obtained for an external radial to femoral bypass, while the PCI is performed through the Impella sheath according to the single access PCI technique. Finally, the advantages and disadvantages of this new approach are described and compared with each of the traditionally known external and internal femoral bypass techniques.

catheterization and cardiovascular interventions

The “lend a hand” external bypass technique: External radial to femoral bypass for antegrade perfusion of an ischemic limb with occlusive large bore sheath ‐ A novel and favorable approach