Blood and body fluid sample collection — Sometimes referred to as bloodwork, there are a variety of different blood tests, each testing a unique aspect or characteristic of the blood, such as red blood cell count or the blood’s ability to coagulate. Electrocardiogram (ECG) — An electrocardiogram, also known as an ECG or EKG, is a diagnostic tool used to test the electrical activity of the heart. It records this data in a machine called an electrocardiograph which displays a chart of the electrical activity. Electrocardiography is commonly used in the diagnosis of several heart conditions, including hypertension and a previous heart attack. Urinalysis — Urine testing is common in the diagnosis of many different medical conditions, such as diabetes, urinary tract infections and kidney disorders. It is also the most popular type of drug testing and STI testing. Serology — Serologic tests involve the diagnostic evaluation of blood serum. They focus on the detection of proteins made by the immune system known as antibodies. These proteins help fight off infection and protect the body from invading pathogens. Serology tests are used in the diagnosis of a variety of diseases, including bacterial, viral and fungal infections. X-ray — One of the most common diagnostic tools, x-rays are used to diagnose medical conditions by looking inside the soft tissues of the body.