Mechanisms underlying feed intolerance in the critically ill: Implications for treatment

Figure 3 Plasma CCK concentrations during fasting and duodenal nutrient stimulation in both feed tolerant and intolerant critically ill patients. Plasma levels of CCK for feed tolerant patients match those seen in healthy subjects receiving intra duodenal nutrition. Feed intolerant patients have higher levels whilst fasting and during enteral nutrition compared to feed tolerant (^aP < 0.01)[41].