A postoperative patient who had surgery for a perforated gastric ulcer has been receiving nasogastric suction for 3 days. The patient now has a serum sodium level of 127 mEq/L (127 mmol/L). Which prescribed therapy should the nurse question?

Choice A reason: Lispro (Humalog) is a type of insulin that is used for mealtime coverage. It is a rapid-acting insulin that starts to work within 15 minutes, peaks in about an hour, and lasts for 2 to 4 hours. It mimics the natural insulin response to food intake, and helps to lower the blood glucose level after meals. The nurse will discuss using lispro for mealtime coverage, and instruct the patient to inject it within 15 minutes before or after eating.

Choice B reason: NPH (Humulin N) is a type of insulin that is not used for mealtime coverage. It is an intermediate-acting insulin that starts to work within 2 to 4 hours, peaks in 4 to 12 hours, and lasts for 12 to 18 hours. It provides a steady background of insulin throughout the day, and helps to control the blood glucose level between meals and overnight. The nurse will discuss using NPH for basal coverage, and instruct the patient to inject it once or twice a day, usually in the morning and/or evening.

Choice C reason: Detemir (Levemir) is a type of insulin that is not used for mealtime coverage. It is a long-acting insulin that starts to work within 1 to 2 hours, has no peak, and lasts for up to 24 hours. It provides a constant level of insulin throughout the day, and helps to maintain the blood glucose level at a stable range. The nurse will discuss using detemir for basal coverage, and instruct the patient to inject it once or twice a day, depending on the individual needs.

Choice D reason: Glargine (Lantus) is a type of insulin that is not used for mealtime coverage. It is a long-acting insulin that starts to work within 1 to 2 hours, has no peak, and lasts for up to 24 hours. It provides a constant level of insulin throughout the day, and helps to maintain the blood glucose level at a stable range. The nurse will discuss using glargine for basal coverage, and instruct the patient to inject it once a day, usually at the same time every day.

Choice A reason: Eating a piece of pizza is not a good option for the student. Pizza is a complex carbohydrate that contains fat and protein, which can delay the absorption of glucose and cause unpredictable blood sugar levels. The student needs a simple carbohydrate that can quickly raise her blood sugar level, such as glucose tablets, fruit juice, or candy.

Choice B reason: Taking an extra dose of rapid-acting insulin is a dangerous option for the student. Insulin lowers the blood sugar level, and the student already has symptoms of hypoglycemia (low blood sugar), such as headache, vision changes, and anxiety. Taking more insulin can worsen her condition and cause seizures, coma, or death.

Choice C reason: Eating 15 g of simple carbohydrates is the best option for the student. Simple carbohydrates are easily digested and absorbed into the bloodstream, and can raise the blood sugar level within 15 minutes. The student should eat 15 g of simple carbohydrates, such as four glucose tablets, half a cup of fruit juice, or three pieces of hard candy, and then check her blood sugar level if possible.

Choice D reason: Drinking some diet pop is not a helpful option for the student. Diet pop does not contain any sugar or calories, and will not affect the blood sugar level. The student needs a source of glucose to treat her hypoglycemia, and diet pop will not provide that.