True about TPN:
Enteral versus parenteral feeding. Effects on septic morbidity after blunt and penetrating abdominal trauma.
In pt. with an abdominal injury, enteral nutrition is preferred over TPN.
The above-referred articles write that in the comparative study between TPN and TEN (Total Enteral Nutrition) it was found that- "There is a significantly lower incidence of septic morbidity in patients fed enterally after blunt and penetrating trauma, with most of the significant changes occurring in the more severely injured patients."
Carbohydrate forms about 40% of energy source
In abdominal injury early parenteral nutrition should be started
Proteins forms 60% of energy source
Lipids provide 20% of energy