Dosage Calculation RN Fundamentals Proctored Assessment 3.1 ati. X CLOSE Question: 6 of 35 Time Remaining: 00:59:50 Pause Remaining: 00:05:00 PAUSE A nurse is preparing to administer enoxaparin 1.5 mg/kg subcutaneous to a client who weighs 187 lb. Available is enoxaparin 60 mg/0.6 ml. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.) ml CONTINUE
The correct answer and explanation is:
Dosage Calculation: Enoxaparin Administration
Step 1: Convert Patient’s Weight to Kilograms
The patient’s weight is given in pounds (lb), so we must convert it to kilograms (kg) using the conversion factor: 1 kg=2.2 lb1 \text{ kg} = 2.2 \text{ lb} 187 lb÷2.2=85 kg187 \text{ lb} \div 2.2 = 85 \text{ kg}
Step 2: Determine the Required Dose
The prescribed dose is 1.5 mg per kg of body weight. 85 kg×1.5 mg/kg=127.5 mg85 \text{ kg} \times 1.5 \text{ mg/kg} = 127.5 \text{ mg}
Step 3: Use the Medication Concentration to Find the Volume
The available concentration of enoxaparin is 60 mg per 0.6 mL.
We set up a proportion to determine how many mL contain 127.5 mg: 60 mg0.6 mL=127.5 mgX mL\frac{60 \text{ mg}}{0.6 \text{ mL}} = \frac{127.5 \text{ mg}}{X \text{ mL}}
Cross multiply: 60X=127.5×0.660X = 127.5 \times 0.6 60X=76.560X = 76.5 X=76.560=1.275 mLX = \frac{76.5}{60} = 1.275 \text{ mL}
Step 4: Round to the Nearest Tenth
1.275≈1.3 mL1.275 \approx 1.3 \text{ mL}
Final Answer: 1.3 mL
Explanation
- Conversion of Weight: Since medication dosages are often based on kilograms, converting the weight from pounds is essential.
- Calculating the Required Dose: Using the patient’s weight in kg, we calculate the needed milligrams of enoxaparin.
- Setting Up a Proportion: The available drug concentration is used to determine the volume needed to achieve the prescribed dose.
- Cross Multiplication: This ensures an accurate calculation.
- Rounding: The final answer must be rounded to the nearest tenth per standard medication calculation rules.
This ensures safe and precise medication administration in clinical practice.
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Here is an infographic illustrating the step-by-step dosage calculation for enoxaparin administration. It visually breaks down the weight conversion, dosage determination, and final calculation for accuracy in clinical practice. Let me know if you need any modifications!
