Patent ID: 7458938

Claim:
A peripherally inserted central venous system catheter which comprises: a sheath having a length and a diameter suitable for extending from a peripheral vein insertion point on a patient to the superior vena cava of the patient, the sheath being constructed of a material suitable for insertion into the venous system of a subject through a peripheral vein and forming two lumens therein which extend from its proximal end at the insertion point to its distal end in the superior vena cava; a connector fastened to the proximal end of one of said two lumens for connecting the lumen to a medical instrument, a third lumen formed in the sheath and extending from its proximal end to a point intermediate the ends of the sheath where it communicates with blood surrounding the sheath through a port formed in the sheath; and a third connector fastened to the proximal end of the third lumen for connecting the third lumen to a fluid infusion device; wherein the third lumen is larger than said two lumens such that fluids may be infused into the venous system of the patient through said port; and wherein the sheath has a length from 35 to 65 centimeters.