Final answer:
The maximum dose of 2% lidocaine without epinephrine for a 25 kg male is roughly 112.5 mg, which translates to about 5.625 ml of the solution. This calculation is based on the standard lidocaine dosage limit of 4.5 mg per kg of body weight, without surpassing 300 mg total.
Step-by-step explanation:
The maximum dose of 2% lidocaine without epinephrine for a 25 kg male is governed by the recommended dosage limits to avoid toxicity. Lidocaine dosage is typically calculated based on body weight, with a standard maximum dose recommended at 4.5 mg per kg of body weight without exceeding 300 mg total. To calculate this specifically for a 25 kg male:
- First, multiply the body weight by the recommended dose per kg: 25 kg × 4.5 mg/kg = 112.5 mg.
- Then, since it's a 2% solution, to find out the volume of lidocaine, divide the total mg dose by the concentration in mg/ml: 112.5 mg ÷ (20 mg/ml) = 5.625 ml.
The maximum dose of 2% lidocaine without epinephrine in a 25 kg male can be calculated using the equation:
Dose (mg) = Body Weight (kg) x Maximum Recommended Dose (mg/kg)
The maximum recommended dose of lidocaine without epinephrine is 4.5 mg/kg. Therefore, the maximum dose for a 25 kg male would be:
Dose (mg) = 25 kg x 4.5 mg/kg = 112.5 mg
Therefore, the maximum dose for a 25 kg male would be approximately 112.5 mg of lidocaine, which equates to 5.625 ml of a 2% lidocaine solution.