A nursing student sees the nurse dip a pacifier in a sugar-water solution for an infant before administering an intramuscular injection. The nursing student asks why the nurse provided this sugar-water pacifier. The nurse’s appropriate response is: This will:

Choice A reason: Administration of an anti-diarrheal is not the appropriate management for an 18-month-old with severe dehydration and weight loss secondary to acute diarrhea and vomiting. Anti-diarrheals are not recommended for children under 5 years, as they can have serious side effects, such as paralytic ileus, toxic megacolon, and worsening of dehydration. Anti-diarrheals do not address the underlying cause of diarrhea, and may prolong the duration of infection or toxin exposure.

Choice B reason: Clear liquids, 1 to 2 ounces at a time, are not sufficient to treat an 18-month-old with severe dehydration and weight loss secondary to acute diarrhea and vomiting. Clear liquids, such as water, tea, or broth, do not contain enough electrolytes, such as sodium, potassium, and bicarbonate, to replace the losses from diarrhea and vomiting. Clear liquids may also dilute the blood sodium level and cause hyponatremia, a condition of low sodium in the blood, which can lead to seizures, coma, and death.

Choice C reason: Oral rehydration solution (ORS) is the best management for an 18-month-old with severe dehydration and weight loss secondary to acute diarrhea and vomiting. ORS is a specially formulated solution that contains water, glucose, and electrolytes in the right proportions to replenish the fluid and electrolyte losses from diarrhea and vomiting. ORS can prevent or treat dehydration, and reduce the need for intravenous fluids. ORS can be given by mouth, spoon, cup, or syringe, depending on the child's ability to drink. The amount of ORS to give depends on the degree of dehydration and the weight of the child. The nurse should follow the guidelines from the World Health Organization (WHO) or the local health authority for the appropriate dosage and frequency of ORS administration¹.

Choice D reason: Intravenous fluids are not the first-line management for an 18-month-old with severe dehydration and weight loss secondary to acute diarrhea and vomiting. Intravenous fluids are only indicated for children who have severe dehydration and are unable to drink or tolerate ORS, or who have signs of shock, such as weak pulse, cold extremities, or altered consciousness. Intravenous fluids require hospitalization, skilled personnel, and sterile equipment, and carry the risk of infection, overhydration, or electrolyte imbalance. Intravenous fluids should be given according to the WHO or the local health authority guidelines, and should be switched to ORS as soon as the child is able to drink¹.

Choice A reason: This statement is true. Kayexalate is a medication that binds to potassium in the colon and exchanges it for sodium, thereby lowering the blood potassium level. It also has a laxative effect, which helps to eliminate the excess potassium in the stool.

Choice B reason: This statement is false. Kayexalate does not have a diuretic effect, which means it does not increase urine output or fluid loss. Diuretics are medications that act on the kidneys and help to remove excess fluid and sodium from the body.

Choice C reason: This statement is false. Kayexalate does not lower the blood sodium level, but rather increases it. This is because it exchanges potassium for sodium in the colon, which adds more sodium to the bloodstream.

Choice D reason: This statement is false. Kayexalate does not cause diarrhea, but rather a laxative effect, which means it stimulates bowel movements and softens the stool. Diarrhea is a condition where the stool is watery and frequent, and can cause dehydration and electrolyte imbalance.