A nurse is preparing a 63-year-old client with type 2 diabetes mellitus for a scheduled coronary artery bypass graft (CABG). The client has been NPO since midnight and received their usual long-acting insulin the previous evening. At 6:00 AM, the client reports mild nausea, and their blood glucose level is 180 mg/dL. To ensure optimal perioperative safety, what is the nurse's priority action?

Priority action for diabetic surgical clients with elevated preoperative glucose levels.

Core Nursing Explanation Key Concept Analysis: This question tests the nurse's ability to manage perioperative glycemic control for a patient with diabetes. The core principle is that surgical stress and fasting can cause significant blood glucose fluctuations. While the patient's blood glucose of 180 mg/dL is elevated, it is not an emergency requiring surgery cancellation. However, it is not "acceptable" to ignore, as uncontrolled hyperglycemia increases surgical risks like poor wound healing and infection. The patient is NPO (Nothing by mouth) and has already taken long-acting insulin, creating a risk for both hyperglycemia and, as the insulin peaks, potential hypoglycemia. The nurse's priority is to initiate a proactive management plan. Answer Rationale: Key Point! The priority action is to contact the physician to obtain orders for insulin coverage and glucose monitoring. This is the correct answer because it represents the safest, most comprehensive nursing intervention. It addresses the current hyperglycemia and establishes a protocol for ongoing management during the NPO and perioperative period. This action follows the nursing process by assessing the data (BG 180 mg/dL, NPO status, nausea) and planning appropriate intervention through collaboration with the healthcare provider. Distractor Analysis: Watch out for confusion! Option ① is incorrect because administering the regular morning insulin dose while the patient is NPO could lead to dangerous hypoglycemia during or after surgery. Insulin regimens are always adjusted preoperatively.
Option ② is incorrect because a blood glucose of 180 mg/dL, while requiring management, is not a critical level that mandates canceling the surgery. This represents an overreaction and failure to implement appropriate nursing interventions.
Option ③ is incorrect because stating the glucose level is acceptable for surgery is a passive and potentially negligent approach. It ignores the need for active management to optimize patient outcomes and prevent further elevation or complications. Related Concepts: Perioperative management of diabetes focuses on maintaining blood glucose within a target range (often 140-180 mg/dL) to reduce infection risk and promote healing. This typically involves holding oral hypoglycemics, adjusting insulin doses (often using an IV insulin drip for major surgeries like CABG), and frequent glucose monitoring. The symptom of nausea can also be related to hyperglycemia. Concept Summary

Concept	Key Takeaway
Perioperative Diabetes Management	Goal is tight glycemic control. Hold oral agents, adjust insulin, use IV insulin drips for major surgery.
NPO & Insulin Risk	Fasting + insulin creates dual risk: hyperglycemia from stress and hypoglycemia from insulin peak without food.
Nurse's Role	Assess glucose, recognize abnormal trends, collaborate with provider for adjusted orders, monitor frequently.
Target Glucose (Surgery)	Generally 140-180 mg/dL. Levels above 200 mg/dL increase infection risk significantly.

Side-by-Side Comparison!

Situation	Nursing Priority Action	Rationale
Pre-op Diabetic: BG 180 mg/dL	Contact MD for coverage & monitoring orders.	Proactive management to optimize levels and prevent intra-op complications.
Pre-op Diabetic: BG 60 mg/dL (Symptomatic)	Administer fast-acting carbohydrate (e.g., IV D50W per protocol) and notify MD.	Hypoglycemia is an immediate threat to safety and consciousness.
Pre-op Diabetic: BG 350 mg/dL with ketones	Notify surgeon/MD immediately; prepare for possible DKA management and surgery delay.	Severe hyperglycemia with ketosis indicates metabolic instability, making surgery high-risk.

Anatomy, Physiology & Pharmacology Points

• Physiology (Surgical Stress): Stress hormones (cortisol, epinephrine, glucagon) released during surgery cause insulin resistance and hepatic glucose production, leading to hyperglycemia.
• Pharmacology (Insulin Types): Long-acting insulin (e.g., glargine, detemir) provides a basal level. It is often given at a reduced dose pre-op, but never a full dose without a plan for glucose coverage while NPO.
• Pathophysiology: Hyperglycemia impairs neutrophil function and collagen synthesis, directly increasing the risk of surgical site infections.

Memory Tips

• Think "C.A.B.G. needs C.A.R.E.": Contact MD, Adjust insulin, Blood glucose checks, Goal is 140-180.
• Rule of 180: For perioperative diabetes, remember >180 mg/dL = Action needed.

Nursing Clinical Practice Guide Clinical Scenario: You are the pre-op nurse for Mr. Jones, a 63-year-old with Type 2 DM scheduled for CABG. He took his glargine (Lantus) 24 units last night as usual. He is NPO, has an IV of D5 1/2NS running at 75 mL/hr, and reports mild nausea. His 0600 fingerstick glucose is 182 mg/dL. Nursing Intervention Strategy: 1. Assessment: Reassess the patient. Check for other signs of hyperglycemia (dry mouth, frequent urination if not catheterized) or hypoglycemia. Review the chart for the physician's specific pre-op orders regarding insulin. 2. Action: Contact the anesthesia provider or surgeon via phone/pager. Report: "Patient Jones, scheduled for CABG, BG is 182, NPO, took Lantus last night, complaining of mild nausea. Requesting orders for insulin coverage and frequency for glucose checks." 3. Implementation: The provider will likely order:

• Frequent glucose monitoring (e.g., every 1-2 hours).
• A subcutaneous sliding scale insulin order based on glucose values.
• OR, for a major surgery like CABG, an order to initiate an IV insulin drip protocol, which requires meticulous monitoring.

4. Evaluation & Education: Monitor glucose response to interventions. Reassure the patient that his glucose is being managed closely for his safety during surgery. Patient Safety and Precautions:

• Never administer a scheduled dose of insulin or oral hypoglycemic to an NPO patient without explicit, adjusted orders.
• Be vigilant for hypoglycemia, especially if the patient received long-acting insulin and the surgery is delayed.
• Know your facility's protocol for IV insulin drips: they always require a second nurse verification of the rate and concentration, and blood glucose must be checked hourly.

Nursing Procedure & Medication Flow Managing a Pre-op Diabetic Patient: 1. Verify NPO status and last dose of diabetes medications. 2. Obtain baseline blood glucose. 3. Compare result to physician's pre-op orders or protocol. 4. If no specific order covers the current situation (e.g., BG is 180), CONTACT THE PROVIDER. 5. Administer insulin per new orders (subcutaneous or IV). 6. Continue monitoring glucose at ordered intervals (e.g., q1h). 7. Document all findings, communications, and interventions clearly.
A Word from Your Senior Nurse "In the controlled chaos of a pre-op area, it's easy to just follow routine. But for our diabetic patients, routine is the enemy. That long-acting insulin is still working, and their body is starting to stress about the upcoming surgery. Your critical thinking to call for orders before a problem becomes an emergency is what makes you a true patient advocate. On the NCLEX and in real life, 'notify the physician' is often the right answer when the patient's condition is changing and falls outside established protocols. It shows judgment, collaboration, and prioritization of safety."