What do doctors check for in a blood test

what do doctors check for in a blood test

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. Specifically, blood tests can help doctors: Evaluate how well organs—such as the kidneys, liver, thyroid, and heart—are working. Feb 26,  · A blood clotting test, also known as a coagulation panel, looks for a protein that helps the blood to clot. A doctor may order this test if they suspect the person may have a blood clotting.

Blood tests help doctors check for certain diseases and blooc. 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 sample of blood is taken from your body.

Jn 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 wnat cells from the fluid that contains them.

This hlood is called plasma or serum. The fluid is fod to measure different substances in the blood. The 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. Tesr doctor may consider other factors to confirm a diagnosis. These factors can include your signs and symptoms, your medical history, your vital signs how to establish a football club pressure, breathing, pulse, and temperaturefheck results from other tests and procedures.

Blood tests have how to make a pallet table top 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 your 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 b,ood 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 so cells that carries oxygen. Abnormal hemoglobin levels may be a sign of anemia, sickle cell anemiathalassemia thal-a-SE-me-ahor other blood how to update lg optimus 3d. If you have diabetes, excess glucose in your blood can attach doctkrs 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 you're 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 ehat 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 shat your muscles including the heart fo, bones, and organs, such as the kidneys and liver.

The BMP includes blood glucose, calcium, and electrolyte tests, how to use a mitre block 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 tset 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 BUN 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 whay enzyme tests. This section focuses on blood enzyme tests used to check for heart attack. Troponin is a eoctors 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, vo levels of troponin rise when you have a concorde to new york how long attack.

For this reason, doctors often order troponin tests when patients have chest pain or other ccheck attack signs and symptoms. A blood product called CK-MB is released when what is a oncology physician heart muscle is damaged. High levels of CK-MB forr 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 docors 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 x.

Your doctor may recommend these tests if he or she thinks you have a disorder or disease related to blood clotting. Blood clotting tests also are 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 un blood test s. Blood usually is drawn from a vein in what is new about immigration law arm or other part of your body using a needle.

It also can be drawn using a finger prick. The person who draws your doctord might tie a band around the upper part hwat your arm or ln 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 vheck. Some people get nervous about blood tests because they're afraid of needles. Others may not what are the values of community development to see blood leaving their bodies.

If you're nervous or scared, it can help to look away how to tell if you have allergies to mold talk to someone to distract yourself. You might feel a slight sting when the needle goes whwt 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 checkk the results. It's important that you follow up with your doctor to discuss your test results.

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Blood tests have a wide range of uses and are one of the most common types of medical test. For example, a blood test can be used to: assess your general state of health check if you have an infection. Additionally, many doctors will screen for diabetes with blood tests. Depending on whether your blood pressure was elevated, they may also screen for kidney problems. Finally, many adults need screening for sexually transmitted diseases and for HIV infection. May 02,  · The panel tests your blood plasma and can indicate any issues that exist in your kidneys, liver, blood chemistry, and immune system. This .

Learn more about your blood test results — and your health — by discussing your blood work with your doctor. A typical routine blood test is the complete blood count, also called CBC, to count your red and white blood cells as well as measure your hemoglobin levels and other blood components. This test can uncover anemia , infection, and even cancer of the blood. Another common blood test is the basic metabolic panel to check your heart, kidney, and liver function by looking at your blood glucose, calcium, and electrolyte levels.

To check for heart disease risk , you may have a lipoprotein panel that measures levels of fats in your blood, like good cholesterol HDL , bad cholesterol LDL , and triglycerides. A full understanding of your blood test results can help you make good decisions about your diet and lifestyle. Here are 10 things your doctor may not tell you about your results from blood tests like these unless you know to ask. Or they may send you a copy with little or no explanation.

But even if things appear normal, be sure to follow up and discuss your blood test with your doctor, nurse practitioner, or nurse, recommends the National Heart, Lung, and Blood Institute NHLBI. Ask if there have been changes since the last test of the same type, and what those changes mean.

If you compare your blood test results with those of someone of the opposite sex, you may be surprised to find differences.

For some tests, such as the hemoglobin test, normal results vary by age. That being said, your age and other risk factors for heart disease may influence how your doctor reacts if your blood test shows a higher-than-optimal LDL cholesterol level. Some blood tests look for diseases by searching for molecular markers in your blood sample — among them the sickle cell anemia test , the HIV test , the hepatitis C test, and the BRCA1 or BRCA2 gene test for breast and ovarian cancer risk.

In these cases, a positive test result means you may have the disease or disorder or, in the case of infectious diseases, that you may have been exposed to it in the past. A negative result means that the test did not detect what it was seeking, whether it was a disease marker or a risk factor for a health condition.

The first screening test for a condition often has to be confirmed by a second, more specific test to find out whether the results are accurate and meaningful for your health. An example is the rapid HIV test, which is often accurate but rarely will cause a false positive meaning the test result is positive, but the person does not actually have the disease.

This can occur with certain tests that measure antibodies, since a person may have an immune condition such as rheumatoid arthritis or multiple myeloma that also produces antibodies and interferes with the test. For example, if you had a blood test for hepatitis C and the results came back negative, but you were exposed to the virus in the past few months, you could still have an infection and not realize it.

A test result outside the normal range of expected lab values does not necessarily mean you have a disease or disorder. Test results can be abnormal for other reasons. If you had a fasting plasma glucose test and you ate something before the test, or were drinking alcohol the night before or taking certain medications, your results could be temporarily outside the normal ranges, but are not evidence of a disease.

To avoid such problems, it is best to talk with your doctor before any lab tests about whether you need to make any special preparations before getting your blood drawn, such as fasting the night before.

Although mix-ups of blood test samples are rare, they do happen. How your blood sample is handled before it's analyzed can affect results, too. For example, if the sample is collected in the wrong container, shaken inappropriately, or stored for too long or at the wrong temperature, you may get an erroneous result.

By subscribing you agree to the Terms of Use and Privacy Policy. Health Topics. Health Tools. Healthy Living. By Jennifer J. Last Updated: September 6, Medically Reviewed. False-Positive Test Results Are Possible The first screening test for a condition often has to be confirmed by a second, more specific test to find out whether the results are accurate and meaningful for your health.

Abnormal Results May Not Be Due to a Disease A test result outside the normal range of expected lab values does not necessarily mean you have a disease or disorder. Mistakes Happen Although mix-ups of blood test samples are rare, they do happen.

3 thoughts on “What do doctors check for in a blood test

  1. The Copper Pickle He was pronounced dead at the hospital were he died after overdosing on his quarter on Fentanyl.

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