The current study hypothesizes that the use of Intravenous intensive insulin therapy (IV-IIT) may be beneficial than IV conventional insulin therapy (IV-CIT) for improving the outcome of non-diabetic surgical patients had postoperative (PO) stress hyperglycemia (PSH).

All postoperative patients who will be admitted to surgical ICU and develop (PSH) will be eligible for evaluation for inclusion and exclusion criteria.

Prior to initiation of IV-IT (insulin therapy), blood samples will be obtained to estimate base-line Blood Glucose level (BG). BG will be estimated hourly during IV-IT to guard against development of hypoglycemic episodes. The assigned IV-IT will continue till reaching the target BG for each group and then will be stopped and patients will be shifted to subcutaneous (sc)-IT. During maintenance sc-IT, BG level will be estimated 6-hourly to assure maintenance of BG within the desired range, otherwise if hyperglycemia recurred or its induced complications as hyperglycemic ketoacidosis or hyperosmolar coma or infectious complications developed, IV-IT will be resumed and BG will be followed-up hourly. The same sequence of follow-up will be continued till stability of BG at the targeted level. IV-IT will be provided as following :

Conventional insulin therapy (CIT) will be provided as a continuous infusion of 50 IU of Actrapid HM in 50 ml of 0.9% sodium chloride using a pump. Infusion will be adjusted to achieve BG level in range of 180-200 mg/dl.

Intensive insulin therapy (IIT) will be provided as an insulin infusion at rate of 1 mU/kg/min and will be adjusted to achieve target BG level in range of 80-110 mg/dl.

Inclusion Criteria:

• All postoperative patients who will be admitted to surgical ICU and developed Post Surgical Hyperglycemia will be eligible for evaluation for inclusion and exclusion criteria

Exclusion Criteria:

• All patients having diabetes mellitus, history of preoperative stress hyperglycemia, endocrinopathies, obesity defined as body mass index (BMI) >30 kg/m2, age younger than 18 years, renal impairment or maintenance on renal replacement therapy and liver diseases.

Once approved by clinical trial.gov data will be participated