What is the significance of monitoring input and output (I&O) in immobile patients?

• A. To monitor daily caloric intake
• B. To assess kidney function only
• C. To ensure fluid balance and prevent dehydration or edema
• D. To track medication adherence

Answer: (C)

Tracking input and output focuses on maintaining the body’s fluid balance. In immobile patients, fluids can accumulate more easily in tissues (edema) or a person can become dehydrated because limited movement and changes in circulation can affect thirst and fluid distribution. By recording everything taken in (oral fluids, IVs, tube feeds) and everything lost (urine, vomit, diarrhea, wound drainage, drains), a nurse can spot imbalance early and adjust care accordingly—such as modifying IV fluids, starting or stopping diuretics, or addressing poor intake. Keeping euvolemia helps prevent complications like dehydration, edema, electrolyte disturbances, and respiratory strain from fluid overload. The other choices aren’t the primary purpose: caloric intake relates to nutrition, kidney function is assessed with broader clues and lab tests, and medication adherence isn’t about fluid balance.