The nurse is planning care for a client with type 1 diabetes mellitus. When planning administration for rapid-acting insulin Lispro, the nurse knows to administer it during which timeframe based on the onset of action?

Lispro lasts 24 hours and does not have to be timed with meals.

60 minutes before meals.

15-30 minutes before meals.

2-6 hours before meals.

Answer and Explanation

The Correct Answer is C

A. This statement is incorrect. Lispro is a rapid-acting insulin, and its duration of action is much shorter than 24 hours. It is typically effective for about 3-5 hours.
B. Administering Lispro 60 minutes before meals would be too early, as it peaks in about 1-2 hours after injection and works best when given closer to meal times.
C. Lispro should be administered 15-30 minutes before meals to match the onset of action, which begins within 15 minutes of injection. This timing allows the insulin to be active when blood glucose rises after eating.
D. Lispro does not require administration 2-6 hours before meals, as this would not align with its rapid onset of action.

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Correct Answer is D

Explanation

A. An inverted P wave is not typically associated with hypokalemia but may indicate other conduction abnormalities such as atrial ectopic rhythms.
B. A wide QRS complex is more commonly associated with hyperkalemia rather than hypokalemia. It may also indicate other conduction delays or ventricular issues.
C. An elevated ST segment suggests myocardial injury or pericarditis, not hypokalemia.
D. A flattened T wave is a hallmark of hypokalemia. Low potassium levels affect the repolarization phase of the cardiac cycle, leading to T wave flattening or inversion and, in severe cases, the presence of a U wave.

A. Furosemide (Lasix) B. Spironolactone (Aldactone) C. Sodium polystyrene sulfate (Kayexalate) D. Insulin

Correct Answer is B

Explanation

A. Furosemide (Lasix) is a loop diuretic that typically causes the loss of potassium through the urine, thus putting clients at risk for hypokalemia, not hyperkalemia.
B. Spironolactone (Aldactone) is a potassium-sparing diuretic, meaning it helps the body retain potassium. As a result, it can lead to hyperkalemia, especially in patients with kidney dysfunction or when used with other medications that increase potassium levels.
C. Sodium polystyrene sulfate (Kayexalate) is used to treat hyperkalemia by exchanging sodium for potassium in the intestines, thus lowering potassium levels. It does not contribute to hyperkalemia.
D. Insulin does not directly cause hyperkalemia; in fact, insulin administration can lower potassium levels by driving potassium into cells.

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The nurse is planning care for a client with type 1 diabetes mellitus. When planning administration for rapid-acting insulin Lispro, the nurse knows to administer it during which timeframe based on the onset of action?

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