Plasma-Lyte is a sterile, isotonic intravenous solution used for fluid and electrolyte replacement in patients. It contains a balanced mix of electrolytes, including sodium, potassium, calcium, and magnesium, which helps maintain proper body function and hydration. This solution is often used in medical settings, such as during surgery or in emergency care, to restore fluid balance and support patients who are unable to take fluids orally. Its composition closely resembles that of human plasma, making it effective for various clinical situations.