Hypotonic solutions are primarily used for what purpose in IV therapy?

Hypotonic solutions are primarily used in IV therapy to provide free water and treat cellular dehydration. When these solutions are administered, they have a lower osmolarity compared to the body's cells, which causes water to move into the cells by osmosis. This movement helps to hydrate cells that may have become dehydrated due to conditions such as excessive fluid loss, hypernatremia, or certain medical conditions that affect fluid balance.

In clinical practice, hypotonic solutions can be particularly beneficial in situations where cells are starved of water, thereby helping to restore normal cellular function and overall fluid balance. This action makes hypotonic solutions a crucial component in managing certain patient needs, especially in cases where the cells are lacking hydration.

Other options do not align with the fundamental properties and uses of hypotonic solutions. For instance, increasing blood volume during hemorrhage typically utilizes isotonic or hypertonic solutions, whereas high sugar content solutions are characteristic of hypertonic solutions, and balancing protein levels usually involves different interventions altogether.