Question

If the patient weighs 120 lbs and does not have any specific medical condition, a maximum of how much cartridges of 2% lidocaine 1:100,000 can be given to the patient?

a. 9.17 cartridges
b. 10.8 cartridges
c. 10.7 cartridges
d. 11. 1 cartridges

Answer 1

The maximum number of cartridges of 2% lidocaine 1:100,000 that can be given to the patient is approximately 0.12 cartridges. The correct answer is option C .

Step-by-step explanation:

To calculate the maximum number of cartridges of 2% lidocaine 1:100,000 that can be given to a patient, we need to consider the maximum safe dosage based on the patient's weight. Lidocaine dosage is usually measured in milligrams (mg) per kilogram (kg) of body weight. The maximum safe dosage of lidocaine is 4.5 mg/kg. First, we need to convert the patient's weight from pounds to kilograms:

120 lbs × 0.4536 kg/lb = 54.43 kg

Next, we can calculate the maximum safe dosage:

4.5 mg/kg × 54.43 kg = 244.93 mg

Since 2% lidocaine means there are 2 grams (2,000 mg) of lidocaine in 100 mL of solution, we can calculate the maximum number of cartridges:

244.93 mg ÷ 2,000 mg = 0.12247 cartridges

Therefore, the maximum number of cartridges of 2% lidocaine 1:100,000 that can be given to the patient is approximately 0.12 cartridges, so the correct answer choice is none of the options provided.