Question

the doctor orders morphine sulfate 12.6 mg subcutaneously every 4 hours as needed for pain for a female weighing 76 pounds. the recommended maximum dose for a child is 0.1 to 0.2 mg/kg/dose. morphine sulfate is available in 21 mg per 1 ml. how many milliliters would be drawn for this dosage? after calculating the dosage, determine if the dosage is therapeutic. if it is not, what is the correct therapeutic dosage? (type an integer or a decimal.) is this dosage therapeutic? if it is not, what is the correct therapeutic dosage? select the correct choice below and, if necessary, fill in the answer box to complete your choice. a. yes, the dosage is therapeutic. b. no, the dosage is too high to be therapeutic. the correct therapeutic dosage is mg. (round to one decimal place as needed.) c. no, the dosage is too low to be therapeutic. the correct therapeutic dosage is mg. (round to one decimal place as needed.)

Explanation:

Step1: Convert weight from pounds to kilograms

Since \(1\) kg \( = 2.2\) pounds, the weight of the child in kg is \(w=\frac{76}{2.2}\approx34.5\) kg.

Step2: Calculate the recommended dosage range

The minimum recommended dose per dose is \(d_{min}=0.1\times34.5 = 3.5\) mg (rounded to one decimal place). The maximum recommended dose per dose is \(d_{max}=0.2\times34.5=6.9\) mg (rounded to one decimal place).

Step3: Calculate the volume of the ordered dose

Using the formula \(V=\frac{D}{H}\), where \(D = 12.6\) mg (ordered dose) and \(H=21\) mg/mL (concentration). So \(V=\frac{12.6}{21}=0.6\) mL.

Answer:

The volume to be drawn is \(0.6\) mL.
For the therapeutic - dosage part:
Since \(12.6\) mg (ordered dose) \(>6.9\) mg (maximum recommended dose), the answer is B. No, the dosage is too high to be therapeutic. The correct therapeutic dosage is \(6.9\) mg.