Why is potassium chloride added to an intravenous infusion for a patient with a nasogastric (NG) tube connected to suction?

Adding potassium chloride to an intravenous infusion for a patient with a nasogastric tube connected to suction is important for compensating for potassium loss due to gastric suctioning. When the stomach contents are removed through suction, it can lead to the loss of not only electrolytes but also significant amounts of potassium, which is crucial for various physiological functions, including muscle contraction and heart function.

Patients with continuous gastric suction may experience hypokalemia (low potassium levels), which can lead to muscle weakness, arrhythmias, and other complications. Therefore, replacing the potassium lost with potassium chloride in the intravenous infusion helps maintain electrolyte balance and prevent these potential complications. The administration of potassium is a critical intervention in managing the effects of gastric suctioning and ensuring the patient's overall stability and health.

While hydration, infection prevention, and enhancing medication absorption are important considerations in patient care, they do not directly address the specific issue of potassium loss associated with gastric suctioning.