Final answer:
To calculate the drip rate for a patient weighing 220 lbs, we convert the weight to kilograms, determine the total drug dosage over 12 hours, and use the concentration to find out the volume needed. The result is a drip rate of 11.25 mL/hr.
Step-by-step explanation:
To calculate the drip rate (mL/hr) for a patient weighing 220 lbs, we first need to convert the weight to kilograms (since the dosage is given in mg/kg). There are approximately 2.2 lbs per kilogram, so 220 lbs is roughly 100 kg (220 / 2.2 = 100 kg).
Next, we calculate the total dosage required over 12 hours:
- 117 mg/kg × 100 kg = 11700 mg over 12 hours.
Now, let's determine how many mLs deliver this dose using the concentration provided (260 mg/3 mL):
- 11700 mg × (3 mL / 260 mg) = 135 mL over 12 hours.
Finally, we find the rate in mL/hr:
- 135 mL / 12 hours = 11.25 mL/hr.
The drip rate for this patient is 11.25 mL/hr.