What is the amount of local anesthetic in one cartridge of 2% lidocaine (1.8 ml)?

What is the amount of local anesthetic in one cartridge of 2% lidocaine (1.8 ml)?

• A. 18 mg
• B. 36 mg
• C. 72 mg
• D. 96 mg

Answer: (B)

To determine the amount of local anesthetic in one cartridge of 2% lidocaine (1.8 ml), it’s essential to understand the concept of percentage concentration in a solution. A 2% solution means there are 2 grams of lidocaine in 100 ml of solution. Since the question specifies that the volume of the cartridge is 1.8 ml, we can calculate the amount of lidocaine as follows: 1. Convert the percentage to a usable amount for the given volume: - The concentration tells us there are 2 grams of lidocaine per 100 ml. - Therefore, in 1 ml, there would be 0.02 grams (or 20 mg) of lidocaine (since 2 grams divided by 100 ml equals 0.02 grams per ml). 2. Now, multiply this concentration by the volume of the cartridge to find the total amount of lidocaine in 1.8 ml: - 20 mg/ml x 1.8 ml = 36 mg Thus, the total amount of lidocaine in one cartridge of 2% lidocaine (1.8 ml) is indeed 36 mg, confirming the option as the correct choice. Understanding how to calculate

To determine the amount of local anesthetic in one cartridge of 2% lidocaine (1.8 ml), it’s essential to understand the concept of percentage concentration in a solution. A 2% solution means there are 2 grams of lidocaine in 100 ml of solution.

Since the question specifies that the volume of the cartridge is 1.8 ml, we can calculate the amount of lidocaine as follows:

1. Convert the percentage to a usable amount for the given volume:

• The concentration tells us there are 2 grams of lidocaine per 100 ml.

• Therefore, in 1 ml, there would be 0.02 grams (or 20 mg) of lidocaine (since 2 grams divided by 100 ml equals 0.02 grams per ml).

2. Now, multiply this concentration by the volume of the cartridge to find the total amount of lidocaine in 1.8 ml:

• 20 mg/ml x 1.8 ml = 36 mg

Thus, the total amount of lidocaine in one cartridge of 2% lidocaine (1.8 ml) is indeed 36 mg, confirming the option as the correct choice. Understanding how to calculate