Question

How many mg of local anesthetic is there in two cartridges of 2% lidocaine 1:100,000? (the cartridge total volume is 1.8 ml)

a. 18 mg
b. 36 mg
c. 72 mg
d. 96 mg

Answer 1

To determine the amount of local anesthetic in two cartridges of 2% lidocaine 1:100,000, we can calculate the total amount of lidocaine in one cartridge and then double it. The total amount of lidocaine is 72 mg.

Step-by-step explanation:

To determine the amount of local anesthetic in two cartridges of 2% lidocaine 1:100,000, we need to calculate the total amount of lidocaine in one cartridge and then double it.

First, let's find the amount of lidocaine in one cartridge. The lidocaine concentration is 2%, which means there are 2 g of lidocaine in 100 ml of solution. Since the cartridge volume is 1.8 ml, we can calculate the amount of lidocaine in one cartridge as follows:

2% lidocaine solution contains 2 g of lidocaine in 100 ml

Therefore, the total amount of lidocaine in one cartridge is 1.8 ml * (2 g/100 ml) = 0.036 g = 36 mg.

Finally, since we have two cartridges, the total amount of lidocaine is 36 mg * 2 = 72 mg.