Ringer's lactate solution, or lactated Ringer's solution, is a type of isotonic, crystalloid fluid further classified as a balanced or buffered solution used for fluid replacement. The contents of Ringer's lactate include sodium, chloride, potassium, calcium, and lactate in the form of sodium lactate, mixed into a solution with an osmolarity of 273 mOsm/L and pH of about 6.5.

5% Dextrose and 0.45% Sodium Chloride Injection, USP solution is sterile and nonpyrogenic. It is a large volume parenteral solution containing dextrose and sodium chloride in water for injection intended for intravenous administration.

Each 100 mL of 5% Dextrose and 0.45% Sodium Chloride Injection, USP contains dextrose, hydrous 5 g and sodium chloride 0.45 g in water for injection. Electrolytes per 1000 mL: sodium (Na+), 77 mEq; chloride (Cl-) 77 mEq. The osmolarity is 406 mOsmol/L (calc.), which is hypertonic. The caloric value is 170 kcal/L.

The pH is 4.3 (3.5 to 6.5). 5% Dextrose and 0.45% Sodium Chloride Injection, USP contains no bacteriostat, antimicrobial agent or added buffer and is intended only as a single-dose injection.

Fluid use perioperative

Three ABG will be collected from the patient. The first at start before any intervention,the second after start of replacement and the third at the end of the operation.

Three ABGs will be collected.The first at the start of the operation before any surgical intervention,the second after the start of fluid replacement and the last sample at the end of the operation.