A 9-year-old child who weighs 66 lb is to receive gentamicin sulfate 2 mg/kg/dose every 8 hours for an Escherichia coli urinary tract infection. How many mg per dose should this child receive? (Enter numeric value only.)

Here's how to calculate the gentamicin sulfate dosage for the child: Convert weight from pounds to kilograms: Weight (kg) = Weight (lb) / 2.2 Weight (kg) = 66 lb / 2.2 Weight (kg) = 30 kg (approximately) Calculate the total gentamicin dose per dose: Dose (mg/kg) x Weight (kg) = Total dose (mg) 2 mg/kg x 30 kg = 60 mg Therefore, the child should receive 60 mg of gentamicin sulfate per dose.