what does a blood test test for

Specifically, blood tests can help doctors: Evaluate how well organs—such as the kidneys, liver, thyroid, and heart—are working. Diagnose diseases and conditions such as cancer, HIV/AIDS, diabetes, anemia (uh-NEE-me-eh), and coronary heart disease. . Also known as a blood chemistry, chemistry panel, or basic metabolic panel, this test looks at the levels of essential enzymes in the blood and also checks kidney function. In addition, the glucose level in the blood is obtained through this test and can indicate if a person needs further testing for diabetes.

Blood tests help doctors check for certain diseases and conditions. They also help check the function of your organs and show how well treatments are working. Blood tests are very common.

When you have routine checkups, your doctor may recommend blood tests to see how your body is working. Many blood tests don't require any special preparations.

For some, you may need to fast not eat any food for 8 to 12 hours before the test. Your doctor will let you know how to prepare for blood tests. During a blood test, a small how to convert mg dl to mmol l of blood is taken from your body.

It's usually drawn from a vein in your arm using a needle. A finger prick also might be used. The procedure usually is quick and easy, although it may cause some short-term discomfort. Most people don't have serious reactions to having blood drawn. Laboratory lab workers draw the blood and analyze it.

They use either whole blood to count blood cells, or they separate the blood cells from the fluid that contains them. This fluid is called plasma or serum. The fluid is used to measure different substances in the blood.

How to make a hugglepod results can help detect health problems in early stages, when treatments or lifestyle changes may work best. Doctors can't diagnose many diseases and medical problems with blood tests alone.

Your doctor may consider other factors to confirm a diagnosis. These factors can include your signs and symptoms, your medical history, your vital signs blood pressure, breathing, pulse, and temperatureand results from other tests and procedures. Blood tests have few risks. Most complications are minor and go away shortly after the tests are done. The CBC can help detect blood diseases and disorders, such as anemiainfections, clotting problems, blood cancers, and immune system disorders.

This test measures many different parts of your blood, as discussed in the following paragraphs. Red blood cells carry oxygen from your lungs to the rest of your body. Abnormal red blood cell levels may be a sign of anemia, dehydration too little fluid in the bodybleeding, or another disorder. White blood cells are part of your immune system, which fights infections and diseases. Abnormal white blood cell levels may be a sign of infection, blood cancer, or an immune system disorder.

A CBC measures the overall number of white blood cells in what is celebrated during hispanic heritage month blood.

A CBC with differential looks at the amounts of different types of white blood cells in your blood. They stick together to seal cuts or breaks on blood vessel walls and stop bleeding. Abnormal platelet levels may be a sign of a bleeding disorder not enough clotting or a thrombotic disorder too much clotting. Hemoglobin HEE-muh-glow-bin is an iron-rich protein in red blood cells that carries oxygen.

Abnormal hemoglobin levels may be a sign of anemia, sickle cell anemiathalassemia thal-a-SE-me-ahor other blood disorders. If you have diabetes, excess glucose in your blood can attach to hemoglobin and raise the level of hemoglobin A1c. Hematocrit hee-MAT-oh-crit is a measure of how much space red blood cells take up in your blood.

A high hematocrit level might mean how to build a potting table plans dehydrated. A low hematocrit level might mean you have anemia. Abnormal hematocrit levels also may be a sign of a blood or bone marrow disorder. Abnormal MCV levels may be a sign of anemia or thalassemia. The basic metabolic panel BMP is a group of tests that measures different chemicals in the blood.

These tests usually are done on the fluid plasma part of blood. The tests can give doctors information about your muscles including the heartbones, and organs, such as the 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. Your doctor will tell you how to prepare for the test s you're having.

Glucose is a type of sugar that the body uses for energy. Abnormal glucose levels in your blood may be a sign of diabetes. For some blood glucose tests, you have to fast before your blood is drawn.

Other blood glucose tests are done after a meal or at any time with no preparation. Calcium is an important mineral in the body. Abnormal calcium levels in the blood may be a sign of kidney problems, bone disease, thyroid disease, cancer, malnutrition, or another disorder.

Electrolytes are minerals that help maintain fluid levels and acid-base balance in the body. They include sodium, potassium, bicarbonate, and chloride. Abnormal electrolyte levels may be a sign of dehydration, kidney disease, liver disease, heart failurehigh blood pressureor other disorders.

Blood tests for kidney function measure levels of blood urea nitrogen BUN and creatinine kre-AT-ih-neen. Both of these are waste products that the kidneys filter out of the body. Abnormal What are the other planets like and creatinine levels may be signs of a kidney disease or disorder.

Enzymes are chemicals that help control chemical reactions in your body. There are many blood what does a blood test test for tests. This section focuses on blood enzyme tests used to check for heart attack. Troponin is a muscle protein that helps your muscles contract. When muscle or heart cells are injured, troponin leaks out, and its levels in your blood rise.

For example, blood levels of troponin rise when you have a heart attack. For this reason, doctors often order troponin tests when patients have chest pain or other heart attack signs and symptoms.

A blood product called CK-MB is released when the heart muscle is damaged. High levels of CK-MB in the blood can mean that you've had a heart attack. A lipoprotein panel is a blood test that can help show whether you're at risk for coronary heart disease CHD. This test looks at substances in your blood that carry cholesterol.

Abnormal cholesterol and triglyceride levels may be signs of increased risk for CHD. Blood clotting tests sometimes are called a coagulation KO-ag-yu-LA-shun panel. These tests check proteins in your blood that affect the blood clotting process. Abnormal test results might suggest that you're at risk of bleeding or developing clots in your blood vessels.

Your doctor may recommend these tests if what animal eats fish in the ocean or she thinks you have a disorder or disease related to blood how to make a volcano for kids. Blood clotting tests also how to build deck flower boxes used to monitor people who are taking medicines to lower the risk of blood clots.

Warfarin and heparin are two examples of such medicines. Other blood tests require fasting not eating any food for 8 to 12 hours before the test.

Your doctor will tell you how to prepare for your blood test s. Blood usually is drawn from a vein in your arm or other part of your body using a needle. It also can be drawn using a finger prick. The person who draws your blood might tie a band around the upper part of your arm or ask you to make a fist. Doing this can make the veins in your arm stick out more, which makes it easier to insert the needle. The needle that goes into your vein is attached to a small test tube.

The person who draws your blood removes the tube when it's full, and the tube seals on its own. The needle is then removed from your vein. If you're getting a few blood tests, more than one test tube may be attached to the needle before it's withdrawn. Some people get nervous about blood tests because they're afraid of needles.

Others may not want to see blood leaving their bodies. If you're nervous or scared, it can help to look away or talk to someone to distract yourself. You might feel a slight sting when the needle goes in or comes out. Once the needle is withdrawn, you'll be asked to apply gentle pressure with a piece of gauze or bandage to the place where the needle was inserted.

This helps stop bleeding. It also helps prevent swelling and bruising. Most of the time, you can remove the pressure after a minute or two.

You may want to keep a bandage on for a few hours. Usually, you don't need to do anything else after a blood test. Results can take anywhere from a few minutes to a few weeks to come back. Your doctor should get the results. It's important that you follow up with your doctor to discuss your test results.

Feb 26,  · Blood enzyme tests measure the levels of specific enzymes in the body. The body produces enzymes to help control chemical reactions within the body. Enzyme blood tests can help a .

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Measure ad performance. Select basic ads. Create a personalised ads profile. Select personalised ads. Apply market research to generate audience insights. Measure content performance. Develop and improve products. List of Partners vendors. If you're having surgery—even a minor procedure—the doctor may order blood tests.

While interpreting blood tests are best left to a physician, it may be helpful to understand what the test is looking for, and what's considered a "normal" result. There are hundreds of different blood tests that can be performed in a lab, but the most common are performed routinely before and after surgery; these tests are very common and should not be cause for alarm.

The provider wants to make sure the patient is in the best possible health for the procedure and to diagnose any conditions that could cause preventable complications. Blood testing is also often done after a procedure to look for bleeding, and to make sure that the organs are functioning well after surgery. Many times these tests are performed routinely, often the night after surgery. This does not mean that there is an expectation that something is wrong, most often these tests confirm that everything is going well after surgery.

Patients in the ICU can expect to have more frequent blood tests. Also known as a blood chemistry, chemistry panel, or basic metabolic panel, this test looks at the levels of essential enzymes in the blood and also checks kidney function. The seven tests included are:. A complete blood count CBC , looks at the different cells that make up whole blood. After surgery, the doctor may order this test to see if a blood transfusion is warranted, or to evaluate for infection.

These tests, known collectively as a coagulation panel, looks at the ability for your blood to clot. Disordered clotting ability can cause problems in surgery, during which bleeding is often expected. If the result show impaired clotting ability, it may be necessary to delay surgery to prevent significant bleeding during the procedure. This test may also be used to monitor blood-thinning medications, such as Coumadin warfarin. Liver function studies, also known as LFTs, are done to determine if the liver is functioning normally.

Elevated numbers can indicate liver damage or poor liver function. An additional test, called a GGT, may be added to the liver panel.

An arterial blood gas, commonly called an ABG, looks at how the respiratory system is functioning and how much oxygen is in the blood. Abnormal results may indicate that the blood is low in oxygen, that the patient is breathing too much or too little on a ventilator during the surgical procedure , or that they need additional oxygen. The ABG is typically performed at least once a day when the patient is on a ventilator for an extended period of time.

The results are used to determine if any changes in ventilator settings are necessary. If the patient is in ICU, a special IV called an arterial line may be placed to make drawing arterial blood easier, particularly when it's being done frequently.

ABG interpretation is very challenging and is typically done by physicians or providers. ABO typing is the medical term for determining the patient's blood type. This is done prior to surgery, so blood can be given in the operating room if necessary. You may be asked to sign a consent form for the administration of blood prior to your surgery, even if a transfusion is not a routine part of the procedure, in case the need arises.

A blood culture is a process where a small sample of your blood is drawn into a bottle of sterile culture medium that "feeds" bacteria. The sample is kept warm and after a few days, it is checked to see if bacteria is growing. If bacteria are growing, it is likely that the same bacteria is growing in your blood.

If bacteria grow, it is then exposed to different antibiotics to see which antibiotic is the most effective for treating your infection. This is a scientific way to choose the best antibiotic for your infection without giving you multiple antibiotics and hoping one works well. While it is helpful to have a general understanding of lab results and what they mean, the healthcare provider is ultimately responsible for interpreting the results and determining how to respond to them. Interpreting lab results is a skill that is honed over the years, so don't feel a need to understand every nuance of your lab results.

It is far more important that you listen closely when the provider is explaining their plan and how they would like to proceed with your care. Sign up for our Health Tip of the Day newsletter, and receive daily tips that will help you live your healthiest life. Association of postoperative high-sensitivity troponin levels with myocardial injury and day mortality among patients undergoing noncardiac surgery.

Rational clinical pathology assessment in the intensive care unit. Anaesth Intensive Care. Basic metabolic panel. Updated April 12, Mount Sinai. Cleveland Clinic. Complete blood count. Complete blood count CBC. Updated Coagulation testing in the perioperative period. Indian J Anaesth. Liver function tests. Gamma-glutamyl transferase GGT blood test. US National Library of Medicine. University of Rochester Medical Center.

Arterial blood gas ABG. Easy blood gas analysis: Implications for nursing. Egyptian Journal of Chest Diseases and Tuberculosis. Arterial blood gases. Proceedings of Singapore Healthcare. Pei Z, Szallasi A. Prevention of surgical delays by pre-admission type and screen in patients with scheduled surgical procedures: improved efficiency.

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