Interpret the RQ value. What does it indicate?
What will be an ideal response?
RQ value = mol CO2 expired/ mol O2 consumed = 0.76
An RQ value of 0.7-0.8 indicates fat as the main energy source, an RQ of 0.8-0.9 indicates a mix of lipids, carbs, and some protein as energy sources, and an RQ of 0.9-1.0 indicates carbohydrates as the main energy source. According to the nutrition consult note, Mr. Perez's RQ was 0.76 . This indicates that while on TPN, fat is his primary energy source. This could be due to the propofol administered at 35 mL/hr (10% lipid solution). Also, this indicates that he is closer to a fasted state (<0.70), compared to overfeeding (>1.0). Although it is optimal to not over feed this patient, this could indicate that he is being underfed and may not be meeting his nutritional requirements.
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