Free NCLEX chapters with quizzes

Andy's K⁺ is 5.8 mEq/L on arrival, yet the provider says his total body potassium is low. What explains this?

• The lab sample was hemolyzed
• Acidosis shifts potassium out of the cells into the serum
• Insulin has already driven potassium into the cells
• Kussmaul respirations retain potassium

Pete's K⁺ is 7.1 with a widening QRS. Which medication does the nurse give FIRST?

• Regular insulin with D50
• IV calcium gluconate
• Sodium polystyrene sulfonate
• Albuterol nebulizer

Antibiotics are ordered STAT for Sam and blood cultures have not been drawn. What does the nurse do?

• Give the antibiotic immediately, then draw cultures
• Draw the cultures first, then give the antibiotic within the hour
• Hold the antibiotic until culture results return
• Ask the provider to cancel the cultures

Ike received rapid-acting insulin at 8 a.m. and delayed breakfast. At what time is he at greatest risk for hypoglycemia?

• Within 15 minutes
• 1 to 3 hours after the injection
• 6 to 8 hours after the injection
• Not until the next dose

While Penny receives magnesium sulfate, which finding requires the nurse to stop the infusion?

• Respiratory rate of 10 with absent patellar reflexes
• Urine output of 45 mL/hr
• Blood pressure of 148/92
• Reported warmth and flushing