A nurse is preparing to administer morphine 8 mg IV intermittent bolus to a client. The amount available is morphine 10 mg/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.)

Before administering the first dose of metformin, the nurse should evaluate the client's creatinine level. Metformin is primarily excreted by the kidneys, and its clearance from the body depends on the renal function. If the client has impaired kidney function, metformin can accumulate in the body and lead to potential adverse effects, particularly lactic acidosis.

Monitoring the creatinine level helps assess the client's kidney function and determines whether it is safe to administer metformin. If the creatinine level is elevated, indicating reduced kidney function, the nurse should consult with the healthcare provider to determine the appropriate dose adjustment or consider an alternative treatment option.

Let's go through the other options and explain why they are not the priority laboratory results to evaluate before administering metformin:

A. Potassium level: While monitoring potassium levels is important in some situations, it is not a primary concern before administering metformin. Metformin does not have a significant effect on potassium levels, and it is not a medication known for causing hypokalemia (low potassium levels).

C. Platelet count: Metformin does not have a direct impact on platelet count, and evaluating platelet count is not typically required before starting metformin therapy. Platelet count monitoring may be relevant for certain other medications or medical conditions, but it is not specific to metformin administration.

D. Liver enzymes: While it is essential to monitor liver function in clients on long-term metformin therapy, evaluating liver enzymes before the first dose of metformin is not the priority. Metformin is primarily cleared by the kidneys, and liver enzymes are not directly affected by its initial administration. However, ongoing monitoring of liver function may be necessary during long-term

To calculate the rate at which the IV pump should be set to deliver dopamine, we need to determine the total amount of dopamine in the infusion and divide it by the desired dose per minute.

Given:

Dopamine concentration: 400 mg in 250 mL

Desired dose: 5 mcg/kg/min

Patient weight: 220 lb

First, we need to convert the patient's weight from pounds to kilograms:

220 lb ÷ 2.2 = 100 kg

Next, we need to calculate the total amount of dopamine needed per minute:

5 mcg/kg/min × 100 kg = 500 mcg/min

Now, we need to convert the dopamine dose from mcg to mg:

500 mcg/min ÷ 1000 = 0.5 mg/min

To determine the infusion rate in mL/hr, we divide the dose in mg/min by the dopamine concentration in the infusion solution:

0.5 mg/min ÷ 250 mL = 0.002 mL/min

Finally, we convert the infusion rate from mL/min to mL/hr by multiplying by 60:

0.002 mL/min × 60 min = 0.12 mL/hr

Therefore, the nurse should set the IV pump to deliver 0.12 mL/hr.