Patients who are getting ready for heart, lung, kidney or other types of operations have to compulsorily undergo varieties of preoperative blood tests. Senior surgeons and their team will review the Preoperative-Panel blood test and find out whether the patients are suffering from any previous comorbid conditions. Surgeons will postpone the surgery or cancel it when they find comorbid or other serious health conditions in patient’s body. There are different types of preoperative serum tests and surgeons will prescribe only important blood tests.