A nurse is checking orders. Which order should the nurse question?

A) A normal saline enema to be repeated every 4 hours until stool is produced
B) A hypertonic solution enema for a patient with fluid volume excess
C) A Kayexalate enema for a patient with severe hypokalemia
D) An oil retention enema for a patient with constipation

Kayexalate binds to and helps excrete potassium, so it would be contraindicated in patients who are hypokalemic (have low potassium). Normal saline enemas can be repeated without risk of fluid or electrolyte imbalance. Hypertonic solutions are intended for patients who cannot handle large fluid volume and are contraindicated for dehydrated patients. Oil retention enemas lubricate the feces in the rectum and colon and are used for constipation.