A nurse is reporting a client's laboratory tests to the provider to obtain a prescription for the client's daily warfarin.
Which of the following laboratory tests should the nurse plan to report to obtain the prescription for the warfarin?

Step 1: Convert the dopamine hydrochloride dose from mcg to mg. We know that 1 mg = 1000 mcg. So, 4 mcg = 0.004 mg.

Step 2: Calculate the total amount of dopamine hydrochloride the client needs per minute. We know that the client weighs 80 kg and the dose is 0.004 mg/kg/min. So, 0.004 mg/kg/min × 80 kg = 0.32 mg/min.

Step 3: Convert the total amount of dopamine hydrochloride the client needs per minute to an hourly rate. We know that 1 hour = 60 minutes. So, 0.32 mg/min × 60 min/hr = 19.2 mg/hr.

Step 4: Calculate the volume of the solution that contains 19.2 mg of dopamine hydrochloride. We know that the solution contains 800 mg in 250 mL. So, (19.2 mg ÷ 800 mg) × 250 mL = 6 mL.

Therefore, the nurse should set the IV infusion to deliver 6 mL/hr (rounded to the nearest whole number).

The correct answer is choice B: Axillary.

Choice B rationale: The axillary site, or under the arm, is the preferred site for obtaining the temperature of a newborn. This method is safe and generally well-tolerated by infants. It carries a lower risk of injury or discomfort compared to other methods.

Choice A rationale: Rectal temperature measurement can be accurate but is more invasive and may cause discomfort or injury to the newborn. It is generally not the preferred method for routine temperature checks in newborns.

Choice C rationale: Tympanic temperature measurement, which uses the ear canal, may not be accurate for newborns due to their small ear canal size and the presence of vernix caseosa or amniotic fluid.

Choice D rationale: Oral temperature measurement is not suitable for newborns as they cannot hold the thermometer in their mouth safely or reliably. This method is more appropriate for older children and adults.