Final answer:
TPN in peripherally inserted CVC (PICC) refers to the administration of nutrition intravenously through a catheter that is inserted into a peripheral vein and advanced until the tip reaches a central vein.
Step-by-step explanation:
TPN stands for Total Parenteral Nutrition, which refers to the administration of nutrition intravenously. A peripherally inserted central venous catheter (PICC) is a type of catheter that is inserted into a peripheral vein and advanced until the tip reaches a central vein, usually in the chest.
TPN can be administered through a PICC to provide essential nutrients to patients who cannot eat or digest food properly. This method allows for long-term nutrition delivery and is commonly used in healthcare settings.