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------------------------------------------------ An obese female patient is to receive 4.6 mg/kg/day of theophylline, dosed on ideal body weight (IBW). The patient is 5'4" and weighs 245 pounds. Calculate the patient's daily dose of theophylline.

Answer :

Final answer:

The daily dose of theophylline for an obese female patient at 5'4" and 245 pounds, dosed on her ideal body weight, would be 250.7 mg per day.

Explanation:

The patient's daily dose of theophylline based on her ideal body weight (IBW) can be calculated through a three-step conversion process. First, the patient's IBW must be determined. For a female patient 5'4" tall, her IBW is approximately 120 pounds or 54.5 kilograms (kg). However, since the patient is 245 pounds, we will use her IBW for the dosage calculation, as this is what is recommended for an obese patient when dosing theophylline.

The three-step conversion process includes converting pounds to kilograms, kilograms to the total daily dose in milligrams (mg), and then dividing by the dosage per tablet if needed. Here, we do not have to convert to tablets as we are asked for the total daily dose in mg. Therefore, we only need to complete the first two steps:

  • Convert IBW in pounds to kilograms: 120 lbs / 2.2 = 54.5 kg.

  • Multiply the patient's IBW in kg by the dosage in mg/kg: 54.5 kg x 4.6 mg/kg = 250.7 mg of theophylline per day.

In conclusion, the nurse or healthcare provider should administer a total of 250.7 mg of theophylline per day to the patient.