The client's laboratory results indicate that the serum potassium level is 2.5 mEq/L (2.5 mmol/L). Which action should the nurse take?
Reference Range: Potassium (K+) [3.5 to 5.0 mEq/L (3.5 to 5.0 mmol/L)]
Prepare to administer a glucose, then insulin, then potassium infusion.
Instruct the client to increase daily intake of potassium rich foods.
Inform the healthcare provider of the need for potassium replacement.
Change the plan of care to include hourly urinary output measurements.
Change the plan of care to include hourly urinary output measurements.
The Correct Answer is C
Rationale:
A. The combination of glucose and insulin is used to shift potassium into cells, which would lower serum potassium levels further; this is not appropriate for treating hypokalemia.
B. Increasing dietary intake of potassium is important but not sufficient to correct a serum potassium level as low as 2.5 mEq/L, which requires more immediate intervention.
C. A potassium level of 2.5 mEq/L is critically low and can lead to life-threatening cardiac arrhythmias. The healthcare provider should be informed immediately to initiate potassium replacement therapy, likely via intravenous infusion.
D. Hourly urinary output measurements may be useful but are not the immediate priority in treating severe hypokalemia.
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Correct Answer is C
Explanation
Rationale:
A. A white blood cell count of 8,000/mm³ is within the normal range and does not indicate a need for dosage adjustment.
B. Inelastic skin turgor may indicate dehydration or aging but does not directly affect drug dosage.
C. Elevated serum creatinine levels indicate impaired renal function, which necessitates a reduced dosage of medications excreted through the kidneys, such as ticarcillin disodium.
D. Thin, fragile veins are a concern for intravenous access but do not affect the medication dosage.
Correct Answer is A
Explanation
Rationale:
A. Administering insulin per sliding scale is appropriate for managing elevated blood glucose in a patient who is NPO and cannot take oral hypoglycemics like metformin.
B. Repeating the test in one hour delays necessary treatment and does not address the current hyperglycemia.
C. A continuous IV infusion of insulin is more appropriate for severe hyperglycemia or critical care situations, but obtaining a sliding scale prescription is more routine in this context.
D. Administering metformin with a sip of water could be considered if the provider orders it, but typically, oral hypoglycemics are held when a patient is NPO.