Do you know what a PIVC is?
DD is the Navy Designation for a Destroyer. The “G” on the end indicates it carries guided missiles.
PIVC in medicine is, I believe, actually more commonly referred to as a PIC line. It is an arterial “gateway” for dispensing meds right into the circulatory system. Usually placed on/in the Femoral artery.
Or are you talking of something else?