Which diagnostic study is NOT listed as part of the preoperative workup for CABG surgery?

• A. CBC
• B. BMP
• C. Coagulation studies
• D. Lipid panel

Answer: (D)

The main idea here is differentiating tests that directly impact immediate perioperative management from those that are more about long-term risk assessment. In preparing for CABG, the team focuses on stabilizing factors that can influence anesthesia, bleeding risk, fluid and electrolyte balance, and organ function during and after surgery. A CBC is checked to assess anemia and platelet status, which affect transfusion needs and bleeding risk. A basic metabolic panel evaluates electrolytes and renal function, crucial for safe medication dosing, fluid management, and cardiac rhythm considerations. Coagulation studies (like PT/INR and aPTT) help anticipate bleeding risk and guide anticoagulation strategy during the operation.

The lipid panel, while useful for managing long-term cardiovascular risk, does not provide information that changes immediate perioperative decisions. It does not directly alter intraoperative planning, anticoagulation strategy, anesthesia dosing, or the need for blood products in the way the other tests do. Therefore, it is not typically listed as part of the essential preoperative workup for CABG.