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Your first dose for a full arrest of Lidocaine calls for 1.5 mg/kg. Your patient weighs 176 lbs. Lidocaine comes packaged as 100 mg/5 ml. How many mL are you giving your patient?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

Answer :

Final answer:

The calculation indicates that a patient weighing 176 lbs should receive approximately 6 mL of Lidocaine based on the provided dosage guidelines; however, this conclusion does not match any of the given multiple-choice answers. None of the options are correct.

Explanation:

To calculate the dosage of Lidocaine a patient weighing 176 lbs should receive, we must first convert the patient's weight from pounds to kilograms. Since one pound is equivalent to 0.453592 kilograms, we multiply the patient's weight by this conversion factor:

  • 176 lbs × 0.453592 kg/lb = 79.832192 kg

Next, we apply the prescribed dosage of 1.5mg/kg to the patient's weight in kilograms to find the total dosage in milligrams:

  • 79.832192 kg × 1.5 mg/kg = 119.748288 mg

Now, we take the total dosage in milligrams and divide it by the concentration of Lidocaine to determine how many milliliters are needed:

  • 119.748288 mg ÷ (100 mg/5 mL) = 5.9874144 mL

Since the available options are in whole numbers, we round our answer to the nearest whole number, which is 6 mL. However, this is not an option given in the question, indicating there might be an error in the provided options or that the question requires further clarification.

None of the options are correct.

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