Seldinger technique for central venous access

A) The needle, attached to a syringe, is inserted into the femoral vein. Once the needle is through the skin, the plunger of the syringe is gently pulled back. The needle is in the vessel when blood flows freely into the syringe. B) The syringe is removed and the flexible end of the guidewire is inserted through the needle into the vessel. C) The needle is removed, leaving the guidewire in place. The catheter is advanced with a twisting motion over the guidewire into the vessel. The guidewire is then removed as the catheter is held in place. D) The catheter should flush easily with fluid.