The healthcare provider prescribes ampicillin 140 mg intravenously (IV) every 8 hours for a child with meningitis. The vial is labeled, "Ampicillin 250 mg for reconstitution with 8.3 mL sterile normal saline for injection to yield a total solution concentration of 30 mg/mL." How many mL should the nurse administer? (Enter the numeric value only. If rounding is required, round to the nearest tenth.)

Here's how to calculate the volume (mL) of the reconstituted ampicillin solution the nurse should administer for each dose: 1. We know the following: Prescribed dose: 140 mg ampicillin (given) Vial information: Contains 250 mg ampicillin powder (given) Reconstituted with 8.3 mL sterile normal saline (given) Yields a final concentration of 30 mg/mL (given) 2. We need to find the volume (mL) of the reconstituted solution containing the prescribed dose (140 mg) considering the final concentration (30 mg/mL). Steps: a. Don't consider the initial volume (8.3 mL) of sterile normal saline. The final concentration (30 mg/mL) refers to the concentration in the diluted solution after adding the saline. b. Use the following formula: Volume to administer (mL) = Dose (mg) / Concentration (mg/mL) c. Plug in the values: Volume to administer (mL) = 140 mg / 30 mg/mL Volume to administer (mL) = 4.67 mL (round to nearest tenth) Therefore, the nurse should administer approximately 4.7 mL of the reconstituted ampicillin solution intravenously every 8 hours for the child.