Blood tests can be used for many different things, including to check cholesterol and blood glucose levels. These help monitor your risk of heart and circulatory diseases and diabetes, or how your condition is being managed. Tests for different chemicals and proteins can indicate how your liver or kidneys are working.
A blood test is typically composed of three main tests: a complete blood count, a metabolic panel and a lipid panel.
The full blood count (FBC) is one of the most commonly requested tests and provides important information about the kinds and numbers of cells in the blood: red blood cells, white blood cells and platelets. Abnormalities in any of these types of cells can indicate the presence of important medical disorders.
The tests can give providers information about your organs, such as the heart, kidneys, and liver. The BMP includes blood glucose, calcium, and electrolyte tests, as well as blood tests that measure kidney function. Some of these tests require you to fast (not eat any food) before the test, and others don't.
The seven blood markers tested include blood urea nitrogen (BUN), carbon dioxide, creatinine, glucose, serum chloride, serum potassium, and serum sodium.
The vitamin B12 level is a blood test that measures how much vitamin B12 is in your blood.
Abnormal levels of red blood cells, hemoglobin, or hematocrit may be a sign of anemia, heart disease, or too little iron in your body. Low white cell count may be a sign of an autoimmune disorder, bone marrow disorder, or cancer. High white cell count may be a sign of an infection or a reaction to medicine.
Complete Blood Count (CBC)
A CBC is a blood test that gives your doctor a good picture of your overall health. It can measure different components and features of your blood, including: The number and size of red blood cells (these cells carry oxygen) The number of white blood cells (these cells help fight infection)
A comprehensive metabolic panel (CMP) is a test that measures 14 different substances in your blood. It provides important information about your body's chemical balance and metabolism. Metabolism is the process of how the body uses food and energy.
Blood tests
But liver function tests can be normal at many stages of liver disease. Blood tests can also detect if you have low levels of certain substances, such as a protein called serum albumin, which is made by the liver. A low level of serum albumin suggests your liver is not functioning properly.
Blood culture: A blood culture test tries to identify what type of bacteria or fungi caused infection in the blood. Blood cultures are collected separately from other blood tests. They are usually taken more than once from different veins. It can take several days to get the results of a blood culture.
Avoiding specific foods and drinks such as cooked meats, herbal tea, or alcohol. Making sure not to overeat the day before a test. Not smoking. Avoiding specific behaviors such as strenuous exercise or sexual activity.
It's important to remember that one blood test alone doesn't determine the risk of heart disease. The most important risk factors for heart disease are smoking, high blood pressure, high cholesterol and diabetes. Here's a look at some of the blood tests used to diagnose and manage heart disease.
Blood test results
The results are sent back to the hospital or to your GP. Some test results will be ready the same day or a few days later, although others may not be available for a few weeks. You'll be told when your results will be ready and how you'll be given them.
If a result is sufficiently abnormal to cause any immediate medical concerns the doctor will contact you themselves. If a doctor wants to discuss a test result where there is no significant level of concern, they may ask reception to book you in for a routine telephone call.
Routine blood work will not include tests that can detect STDs due to the number of potential infections and the complexity of each test.
Aside from leukemia, most cancers cannot be detected in routine blood work, such as a CBC test. However, specific blood tests are designed to identify tumor markers, which are chemicals and proteins that may be found in the blood in higher quantities than normal when cancer is present.
What are inflammatory markers? Inflammatory markers are blood tests used by doctors to detect inflammation in the body, caused by many diseases. This can include infections, auto-immune conditions and cancers.
Blood tests known as 'inflammatory markers' can detect inflammation in the body, caused by many diseases including infections, auto-immune conditions and cancers. The tests don't identify what's causing the inflammation: it might be as simple as a viral infection, or as serious as cancer.
The comprehensive metabolic panel (CMP) is a blood test that gives doctors information about the body's fluid balance, levels of electrolytes like sodium and potassium, and how well the kidneys and liver are working.
A GFR of 60 or higher is in the normal range. A GFR below 60 may mean kidney disease. A GFR of 15 or lower may mean kidney failure.