# How do you calculate parenteral nutrition?

## How do you calculate parenteral nutrition?

To calculate the grams of protein supplied by a TPN solution, multiply the total volume of amino acid solution (in ml*) supplied in a day by the amino acid concentration. Note: If the total volume of AA is not stated in the prescription, you can calculate it. Just multiply the rate of infusion of AA by 24 hr.

## How do you calculate a 3 in 1 TPN?

3 in 1 TNA Solutions

- Determine patient’s kcalorie, protein, and fluid needs.
- Divide daily fluid need by 24 to determine rate of administration.
- Determine lipid concentration.
- Determine protein concentration by dividing protein needs (grams) by total daily volume and multiply by 100.
- Determine dextrose grams.

**How do you calculate TPN fluids?**

To determine the additional sterile water prescription for the TPN solution, you need to know the patient’s fluid needs. Subtract volume of TPN solution provided in a day from the fluid requirement. The difference is the volume of sterile water that should be added to the TPN solution.

### How do you calculate PPN?

The maximum osmolarity tolerated by PPN is 900-1100 mOsm/L….To calculate solution osmolarity:

- multiply grams of dextrose per liter by 5.
- multiply grams of protein per liter by 10.
- add a & b.
- add 300 to 400 to the answer from “c”. (Vitamins and minerals contribute about 300 to 400 mOsm/L.)

### How do you calculate calories in a bag of TPN?

500 cc x 2% = 10 grams x 4 kcal/g = 40 kcal. 75 cc lipid x 2 kcal/cc = 150 kcal. Total kcal = 263.5 + 40 + 150 = 453.4 or 90.7 kcal/kg. Order electrolytes, minerals – order standard or adjust based on initial labs.

**How do you calculate tube feeding rate?**

If the feeding order is written with dose and time, you must determine the rate. Divide dose in mL by time in hrs to determine the rate. Rate is the amount of liquid food you give in one hour. Rate is measured in mL/hr (milliliters per hour).

#### How is TPN NICU calculated?

Determine the amount of IV fluids received over the past 24 hours: mEq electrolyte/IV solution ÷ 100 ml IV fluid × x ÷ the amount of IV fluids/24 hr 3. Divide x by weight to determine mEq/kg/day.

#### How do you calculate grams of fat in TPN?

To determine kcalories supplied by lipid, multiply the volume of 10% lipid (in ml) by 1.1; multiply the volume of 20% lipid (in ml) by 2.0. If lipids are not given daily, divide total kcalories supplied by fat in one week by 7 to get an estimate of the average fat kcalories per day.

**How is nursing feed rate calculated?**

## How do you calculate mL/kg per day?

Formulas Used:

- For 0 – 10 kg = weight (kg) x 100 mL/kg/day.
- For 10-20 kg = 1000 mL + [weight (kg) x 50 ml/kg/day]
- For > 20 kg = 1500 mL + [weight (kg) x 20 ml/kg/day]