What electrolyte disturbance is known to worsen constipation post-operatively?

• A. Hyperkalemia
• B. Hyponatremia
• C. Hypokalemia
• D. Hypercalcemia

Answer: (C)

Hypokalemia, or low potassium levels, is known to worsen constipation post-operatively. Potassium plays a crucial role in the proper functioning of muscle contractions, including those in the gastrointestinal (GI) tract. When potassium levels are low, the smooth muscles of the intestines lack the necessary stimulation to contract effectively, slowing down peristalsis, which can lead to increased bowel transit time and constipation.

In a postoperative setting, patients often experience alterations in electrolyte balance due to factors like fluid shifts, medications, and dietary changes. Hypokalemia is particularly concerning because it may compound the effects of other postoperative issues such as reduced mobility and the effects of steady-state anesthesia, both of which can contribute to constipation.

While other electrolyte disturbances like hypercalcemia or hyperkalemia may also affect GI function, they do not have the same direct and well-documented impact on the motility of the intestines as hypokalemia does. Therefore, recognizing and managing potassium levels is crucial in preventing constipation after surgery.