Reasons for Laboratory Tests
If a recent visit to the doctor has left you with a lab slip; there is no need to panic. There are over 1000 laboratory tests available, so there are many reasons a doctor may order laboratory tests. These tests provide valuable information and can alert your doctor to any potential problems.
Routine Physical: During a routine physical, blood or urine samples may be ordered to get an idea of your general health. A baseline will also be established in case you become ill in the future.
Confirmed Pregnancy: If a visit to the doctor has confirmed you are pregnant; a variety of routine lab tests will likely be ordered. These will include both blood and urine tests. The blood tests will check that your sugar levels are within normal ranges. Blood samples will also be tested for the presence of Hepatitis, HIV and Rubella antibodies. Your blood type will be determined and you will be tested for anemia. Urine samples may be checked for infection.
Infection or illness: If you haven't been feeling well for a period of time, your doctor may want to check your white blood cell count. If you have an elevated white blood cell count, this may indicate an infection that needs to be treated. If you have symptoms of foodborne illness, a stool sample may be collected to determine if antibiotics are needed.
Cancer: If your doctor notices signs or symptoms that direct him to believe you could have cancer, a blood test would be ordered. There are certain tests that can detect specific types of cancer. The CA-125 test is for ovarian cancer and the PSA, prostate specific antigen, tests for prostate cancer.
Anemia: If you are exhibiting symptoms of weakness, fatigue and headaches, a doctor may order a test for anemia. This will check your ferritin levels and determine if you need to include more iron in your diet or take supplements.
HIV or STD infection: If you have been using drugs or having unprotected sex, a doctor may urge you to get tested for these conditions. The sooner they are diagnosed, the quicker treatment can be started.
Urinary Tract Infection: Perhaps visiting the restroom has suddenly become more frequent and painful. If your doctor suspects a urinary tract infection, a urine sample may be requested.
These are some common reasons for laboratory tests. However, many more exist and you should always follow your doctor's orders.