If three carpules are used, what is the total volume?

If three carpules are used, what is the total volume?

• A. 3.6 ml
• B. 5.4 ml
• C. 7.2 ml
• D. 9.0 ml

Answer: (B)

Carpules used for dental local anesthesia are standardly 1.8 mL each. To get the total when three carpules are used, multiply 1.8 mL by 3, which equals 5.4 mL. So the total volume delivered is 5.4 mL. The other numbers come from multiplying 1.8 mL by the corresponding number of carpules (2 carpules → 3.6 mL, 4 carpules → 7.2 mL, 5 carpules → 9.0 mL).

Carpules used for dental local anesthesia are standardly 1.8 mL each. To get the total when three carpules are used, multiply 1.8 mL by 3, which equals 5.4 mL. So the total volume delivered is 5.4 mL. The other numbers come from multiplying 1.8 mL by the corresponding number of carpules (2 carpules → 3.6 mL, 4 carpules → 7.2 mL, 5 carpules → 9.0 mL).