What are the three common blood tests performed in the preoperative period?

The three common blood tests performed in the preoperative period include a complete blood count, a coagulation profile, and the assessment of electrolytes and creatinine levels.

A complete blood count (CBC) is essential as it provides information on the patient's overall health and helps identify any underlying conditions such as anemia or infection, which could complicate surgery. The coagulation profile is critical for assessing the patient's ability to clot, thus preventing excessive bleeding during and after the procedure. Lastly, measuring electrolyte and creatinine levels is vital to evaluate kidney function and metabolic stability. Imbalances in electrolytes can affect cardiac function and overall physiological stability during surgery, making it important to identify these issues beforehand.

Other answer choices contain components that might be relevant in different contexts but do not cover the combination of tests most commonly performed preoperatively.