What is the estimated blood volume of an infant weighing 7.8 pound?

To estimate the blood volume of an infant weighing 7.8 pounds, you can use the following formula:

Blood volume (mL) = 80 x weight (kg)

First, convert the weight from pounds to kilograms:

7.8 pounds / 2.20462 pounds per kilogram = 3.54 kilograms

Now, calculate the estimated blood volume using the formula:

Blood volume (mL) = 80 x 3.54 kg = 283.2 mL

Therefore, the estimated blood volume of an infant weighing 7.8 pounds is approximately 283.2 mL.