What is the maximum dose of 2% lignocaine without vasoconstrictors?

The maximum dose of 2% lignocaine (also known as lidocaine) without vasoconstrictors is based on the concentration of the anesthetic and the patient's weight, as well as the clinical scenario. For a typical 2% lignocaine solution, the maximum allowable dosage is approximately 5 mg/kg for healthy adults, with a common clinical guideline suggesting a total of 300 mg for most adult patients without vasoconstrictors.

Calculating this for a 70 kg adult, the total maximum dose would be around 350 mg, which can vary depending on specific health conditions but is generally cited in practical terms. When calculating in mililiters for a 2% solution, which contains 20 mg of lignocaine per mL, this translates to about 15 mL, theoretically. However, practical and safety limits often suggest a guideline closer to 10 mL for routine clinical use.

Thus, the appropriate choice reflects a safe and commonly used maximum dose in a clinical setting, ensuring patient safety while providing effective anesthesia.