Which preoperative tests would you order?
Answer:
In addition to the routine systemic examinations of all organ systems, special attention should be paid to the cardiovascular status.
Renal function—urinalysis, blood urea nitrogen, creatinine
The routine evaluation of hepatic function is not standard. Patients who should have testing to evaluate hepatic function include those with a previous history of hepatitis, jaundice, or a history of drug abuse.
Pulmonary function—chest x-ray film, baseline arterial blood gases, and spirometry if indicated
Hematologic function—complete blood count, prothrombin time, partial thromboplastin time, platelets (platelet function if available and/or indicated; namely, for those patients previously receiving antiplatelet therapy)
Metabolism—electrolytes and blood sugar
Cardiovascular function—computed tomography (CT) scan absolutely indicated in redo sternotomy to investigate the proximity of the sternum to the anterior surface of the heart, resting and exercise ECG (if a stress test was performed preoperatively), cardiac catheterization and coronary angiography, location and severity of coronary occlusion, echocardiography, and left ventricular function (from catheterization, magnetic resonance imaging, enhanced multidetector CT, and/or echocardiography)