Personalized NutritionPersonalized Nutrition to Improve Recovery in Trauma

The purpose of this study is to determine if a particular method of providing nutrition improves the outcomes of patients in the intensive care unit (ICU) who have undergone abdominal surgery following trauma and would require nutrition delivered via the bloodstream (called total parenteral nutrition or TPN). The nutrition method being tested is a structured nutrition delivery plan, called the SeND Home pathway, that involves TPN, oral nutrition supplements, and the use of a device (called an indirect calorimeter or IC) to measure calorie needs. Participants will be randomly assigned (like the flip of a coin) to the SeND Home program or standard of care nutrition. In the SeND Home program, participants will receive TPN, followed by oral nutrition supplements (shakes) for 4 weeks after discharge. The control group will follow standard of care nutrition delivery that begins during ICU stay and concludes at hospital discharge. Participants in both groups will undergo non-invasive tests that measure how much energy (calories) they are using, body composition, and muscle mass and complete walking and strength tests, and surveys about quality of life.