 This study will compare three methods of comparing how glucose is regulated with IV insulin. The first method uses a sliding scale of insulin based on glucoses drawn at set intervals. The second method uses an algorithm that uses the glucose drawn at a set interval and also how much that glucose changed from the last time the glucose was drawn to adjust the amount of insulin to be given. The algorithm takes into count how fast the glucose is changing and also how far the glucose is from the expected values to improve the accuracy of the amount of insulin to be given. The glucocommander is a handheld based algorithm that again takes in how fast the glucose has changed and how far the glucose is from where you want to be and adds another layer in that it tells the nurse when to draw the next glucose so that if the glucose is very far away from the expected value drawing glucose in a shorter time period will help get to the expected glucose faster. The comparison is does the method reach the expected glucose faster and how often is the glucose going to be to low. Methods that improve the way to get the glucose to the expected value are not better for the patient if they increase the chance of hypoglycemia. This study will compare three methods of regulating glucose with insulin. 