JM is a patient in the ICU (6'1 and 256 pounds). He is currently receiving 3-in-1 PN
Question:
JM is a patient in the ICU (6'1" and 256 pounds). He is currently receiving 3-in-1 PN at 125 mL/h. The PN is 12.1% w/v dextrose and 4.7% w/v protein. The prescriber wants the patient's protein intake from the PN to be 1.4 g/kg IBW per day. By how many grams will the current protein need to be reduced to achieve this?
show detail calculations.
Sol190:
First, we need to determine the patient's ideal body weight (IBW) using the formula:
IBW (male) = 50 kg + 2.3 kg for each inch over 5 feet IBW (male) = 50 kg + (2.3 kg/inch 12 inches) = 77.6 kg
Next, we calculate the patient's protein requirement using the formula:
Protein requirement = IBW protein factor Protein requirement = 77.6 kg 1.4 g/kg = 108.64 g/day
Now we need to calculate the current protein intake from the PN:
Protein intake from PN = PN rate (mL/h) protein concentration (% w/v) 10 Protein intake from PN = 125 mL/h 4.7% 10 = 58.75 g/day
To calculate the reduction needed in protein intake, we subtract the desired protein intake from the current protein intake:
Reduction in protein intake = current protein intake - desired protein intake Reduction in protein intake = 58.75 g/day - 108.64 g/day = -49.89 g/day
This means that we need to reduce the protein intake from the PN by 49.89 g/day to meet the prescriber's goal.
College Mathematics for Business Economics Life Sciences and Social Sciences
ISBN: 978-0321614001
12th edition
Authors: Raymond A. Barnett, Michael R. Ziegler, Karl E. Byleen