Inclusion Criteria:  American Society of Anesthesiology (ASA) general condition assessment 1 or 2  Exclusion Criteria:  Chronic kidney disease Circulatory failure Lung diseases Diseases of the heart valves History of hypoglycaemic episodes or any carbohydrate disturbance. Height less than 120 cm or greater than 230 cm Body weight less than 30 kg or greater than 155 kg.