'A patient receives 2900mL of an IV solution containing 3g of glucose per 100 mL. How much energy, in kilocalories, does the patient obtain from glucose?
I have always used 4kcal/g carbohydrate. Probably that's an average and glucose may not be "average" but based on that the answer is
3 g x (2900/100) = g glucose infused = about 87g.
Then 4 kcal/g glucose x 87g glucose = ? kcal
I found on the web numbers from 3.3 to 3.8 kcal/grams glucose
To calculate the energy obtained from glucose, we need to know the number of kilocalories per gram of glucose.
Glucose provides approximately 4 kilocalories (kcal) of energy per gram.
In the given scenario, the patient receives an IV solution containing 3 grams of glucose per 100 mL of IV solution.
To find the total energy obtained from glucose, we can follow these steps:
Step 1: Calculate the total number of grams of glucose in the IV solution.
To do this, we need to convert the volume from milliliters (mL) to liters (L). Since 1 L is equal to 1000 mL, we divide 2900 mL by 1000 to get the volume in liters.
2900 mL ÷ 1000 = 2.9 L
Next, we calculate the total number of grams of glucose in the solution. Since there are 3 grams of glucose per 100 mL, we multiply the volume in liters by the grams of glucose per 100 mL.
2.9 L × 3 g/100 mL = 8.7 g
So, the patient receives 8.7 grams of glucose.
Step 2: Calculate the energy obtained from glucose.
We know that 1 gram of glucose provides 4 kilocalories of energy. To find the energy obtained from 8.7 grams of glucose, we multiply the number of grams by the kilocalories per gram.
8.7 g × 4 kcal/g = 34.8 kcal
Therefore, the patient obtains approximately 34.8 kilocalories of energy from the glucose in the IV solution.