1. Total Parenteral Nutrition is total nutrition, which is provided when a patient does not receive any other form of nutrition. Peripheral Parenteral Nutrition is only partial, which means that the patient may be getting nutrition from other sources.
2. TPN comes in a higher concentration, and can be administered through larger veins. PPN comes in a lesser concentration, and can be delivered using a peripheral vein.
3. When compared to TPN, the PPN is not a preferred nutritional supplement for a long time.
4. TPN comes in a higher concentration of components when compared to PPN.