Which solution is considered balanced?

A balanced solution is one that closely resembles the electrolyte composition of normal plasma, helping to maintain acid-base balance and effective hydration in the body. Lactated Ringer's solution is classified as a balanced electrolyte solution because it contains sodium, potassium, calcium, and lactate, which acts as a buffer. This composition helps to imitate the natural electrolyte balance found in the blood, making it suitable for replenishing fluids and electrolytes in various medical situations, such as during surgery or trauma.

The other options lack the specific balance of electrolytes: normal saline primarily contains sodium and chloride without the additional electrolytes found in Lactated Ringer's, while dextrose solutions primarily provide carbohydrates, lacking necessary electrolytes entirely. 5% albumin is a colloid solution that enhances oncotic pressure but does not contain electrolytes in a balanced manner, which is essential for fluid therapy. Hence, Lactated Ringer's is optimal for maintaining homeostasis in patients.