Question

Utilizing the TPN by grams method, identify the final order for a patient needing 3000 kcal and 125 grams of protein.

Answer 1

*TPN stands for total parenteral nutrition, that means administration of hypertonic IV bolus solution that prevents or corrects nutritional deficiencies.

*It can be administered through a central line or PICC Line

*TPN contains complete nutrition, this includes:

- Calories (in a high concentration [20% to 50%] of
dextrose)
- Lipids/essential fatty acids
- Protein
- Electrolytes
- Vitamins
- Trace elements.

*Purpose :

- To meet the patient's nutritional needs
- To allow the growth of new body tissue (protein)

suppose here the final order of the patient needing 3000kcal and 125 grams of proteins :

Thus we can calculate it as::

Pt receiving 3 litres consisting of:

1500 ml 50% dextrose (3.4 kcal/g)

1500 ml 8.34% CAA (4 kcal/g) {Protein in Parenteral solutions are provided in the form of crystalline amino acids (CAA)}

*CHO: is 50 g/100 ml

= x g / 1500 ml

x = 750 g dextrose x 3.4 kcal/g = 2550 kcal

*Protein:

¨1500 ml of 8.34 % amino acids:

¨ 1500 ml x 8 .34g/100 ml = 125g

¨Or 1500 x .0834 =125 g

Then kilocalorie from protein :

x= 125 x 4 = 500 = 500 kcal

Thus we can say that the total kilocaorie :

2550+ 500 = 3050 kcal,

Thus we can say that the patientis receiving a totalof 3000 kilocalorie from carbohydrate and protein