Angioplasty from the contralateral approach: use of a guiding catheter and coaxial angioplasty balloons. An 8-F guiding catheter has been developed for use with coaxial angioplasty balloon catheters in angioplasty of the femoral artery from the contralateral approach when antegrade puncture of the ipsilateral femoral artery is not possible. The catheter may be used for angioplasty of the femoral artery bifurcation and the superficial femoral artery and for arterial stenoses in patients with renal transplants. 