 Through the pocket a puncture of the vein with a thin wall needle was made and a long sheath was used to help carry it along the tortuosity of the proximal subclavian and innominate superior vena cava. 
Through the pocket a puncture of the vein with a thin wall needle was made and a long sheath was used to help carry it along the tortuosity of the proximal subclavian and innominate superior vena cava .