39. The adult dose of a medication is 10 mg/kg of body weight. What dose, in g, should be given to a patient weighing 220 lb?
Answer: A
The appropriate dose for a patient weighing 220 lb is 1 g.
To calculate the dose for a patient weighing 220 lb, we first convert the weight to kilograms, which is approximately 100 kg (since 1 lb is approximately 0.453592 kg). The required dose is 10 mg/kg, resulting in a total dose of 1000 mg, or 1 g.
A) 1
This option is correct because converting 220 lb to kilograms gives us approximately 100 kg. Multiplying 100 kg by 10 mg/kg results in 1000 mg, which equals 1 g.
B) 10
This option is incorrect as it suggests a dose of 10 g. The calculation based on the patient's weight does not support this amount, as the actual required dose is significantly lower at 1 g.
C) 100
This option is also incorrect. A dose of 100 g far exceeds the calculated requirement. The correct dose, based on the weight of the patient, is 1 g, not 100 g.
D) 1000
While this option may appear correct if interpreted in milligrams, it does not align with the question asking for the dose in grams. The correct answer is 1 g, which corresponds to 1000 mg.
Conclusion
The correct answer is 1 g, as calculated from the patient's weight and the medication's dosing guidelines. All other options either miscalculate the required dose or provide values that do not align with the conversion and calculation needed for this medication dosage.