A nurse is caring for a diabetic client scheduled for major abdominal surgery in the morning. The client's preoperative blood glucose is 180 mg/dL, and the anesthesiologist has ordered to hold all oral diabetic medications. What is the most appropriate nursing action to ensure client safety?

Diabetic clients undergoing surgery require careful glucose management to prevent complications. Oral diabetic medications are typically held preoperatively, but insulin coverage may be needed to maintain glucose control and prevent hyperglycemia-related complications during the perioperative period.

This question focuses on key safety considerations for diabetic patients undergoing surgery, particularly perioperative blood glucose management.

When a diabetic patient is scheduled for surgery, oral diabetic medications are generally stopped before the procedure. This is due to several important factors. A major concern is that oral diabetic drugs, especially metformin, can increase the risk of lactic acidosis when combined with the physiological stress of anesthesia and surgery. Additionally, the patient will be fasting (NPO) before surgery, which disrupts the normal relationship between food intake and the timing of diabetic medication.

However, simply stopping all diabetic medications without alternative glucose management can lead to dangerous hyperglycemia. Surgery and anesthesia cause physiological stress that increases cortisol and other stress hormones, raising blood glucose levels. With a preoperative blood glucose already elevated at 180 mg/dL, it is highly likely to increase further during the surgical procedure.

The most appropriate nursing action is to contact the physician to discuss insulin coverage for the perioperative period. This ensures the patient's blood glucose levels remain within a safe range throughout the surgical experience while oral medications are held. Typically, a sliding scale insulin protocol or continuous insulin infusion may be prescribed for glucose control.

This approach demonstrates critical thinking and advocacy for patient safety, which are essential components of professional nursing practice and concepts frequently tested on the NCLEX-RN exam.

Understanding the Clinical Scenario
The client has type 2 diabetes and is scheduled for major abdominal surgery. The preoperative blood glucose is 180 mg/dL, which is elevated, indicating suboptimal glycemic control. The anesthesiologist's order to hold all oral diabetic medications is standard practice to prevent intraoperative hypoglycemia, but it creates a gap in glycemic management for a patient already experiencing hyperglycemia. The core safety issue is preventing both severe hyperglycemia and hypoglycemia during the perioperative period.

Why Holding Oral Agents Alone Is Insufficient
The order to hold oral medications is correct and must be followed. Metformin is held due to the risk of lactic acidosis if renal perfusion is compromised during surgery. Glipizide, a sulfonylurea, is held because it stimulates insulin secretion and can cause fasting hypoglycemia when the client is NPO (nothing by mouth). However, simply holding these medications does not address the existing hyperglycemia of 180 mg/dL. Uncontrolled perioperative hyperglycemia is a significant patient safety risk, as it impairs wound healing, increases susceptibility to infections, and can cause fluid and electrolyte imbalances [1,2].

Rationale for the Correct Answer
The most appropriate action is to contact the physician to discuss insulin coverage for the perioperative period. Major clinical practice guidelines for diabetes care in the hospital emphasize that in the perioperative setting, oral and non-insulin injectable agents are generally not appropriate. The standard of care for managing hyperglycemia during surgery is a transition to insulin therapy, which allows for precise, titratable control of blood glucose levels [1,2]. A blood glucose of 180 mg/dL preoperatively is a clear indication that the client will likely require insulin to maintain glycemic targets, typically between 110 mg/dL and 180 mg/dL ^[1]. The nurse must advocate for the client by communicating this assessment finding and the need for a proactive insulin plan, which may include a basal-bolus regimen or an intravenous insulin infusion, rather than simply monitoring and reacting to further hyperglycemia.

Analysis of Incorrect Options
- Option 1: Administering the oral medications would directly violate the anesthesiologist's order and could lead to intraoperative hypoglycemia from the sulfonylurea or the rare but serious complication of metformin-associated lactic acidosis. This is an unsafe action.
- Option 2: Holding all medications and only monitoring blood glucose is a passive approach that fails to address the current hyperglycemia. This delays necessary treatment and allows the client to proceed to surgery in a hyperglycemic state, increasing the risk of poor surgical outcomes [1,2].
- Option 4: Giving a partial dose of oral medications is not a safe or evidence-based practice. It still carries the risks of the original medications and does not provide the controlled, predictable glucose management that insulin offers. The "small sip of water" also violates standard NPO restrictions for surgery. The established standard is a complete transition to insulin for the perioperative period [1,2].