Hartmann's Solution, also known as Compound Sodium Lactate, is an intravenous (IV) fluid commonly used in medical settings for fluid and electrolyte replenishment. It is especially useful in treating conditions such as hypovolemia (low blood volume), dehydration, metabolic acidosis, and electrolyte imbalances. The solution is designed to closely mimic the body's natural plasma composition, making it ideal for restoring fluid balance during surgery, trauma, or illness.