Blood Test Results:

NOTE: ALWAYS DISCUSS YOUR RESULTS WITH YOUR DOCTOR
CBC Stands For Complete Blood Count
What Is Being Tested And What It Means

The complete blood count (CBC) is a test that evaluates the cells that circulate in blood. Blood consists of three types of cells suspended in fluid called plasma: white blood cells (WBCs), red blood cells (RBCs), and platelets (PLTs). They are produced and mature primarily in the bone marrow and, under normal circumstances, are released into the bloodstream as needed

A CBC is typically performed using an automated instrument that measures various parameters, including counts of the cells that are present in a person's sample of blood. The results of a CBC can provide information about not only the number of cell types but also can give an indication of the physical characteristics of some of the cells.

A Standard CBC Includes The Following

Significant abnormalities in one or more of the blood cell populations can indicate the presence of one or more conditions. Typically other tests are performed to help determine the cause of abnormal results. Often, this requires visual confirmation by examining a blood smear under a microscope. A trained laboratorian can evaluate the appearance and physical characteristics of the blood cells, such as size, shape and color, noting any abnormalities that may be present. Any additional information is noted and reported to the healthcare provider. This information gives the health practitioner additional clues as to the cause of abnormal CBC results.

The Three Types Of Cells Evaluated By The CBC Include

White Blood Cells-There are five different types of WBCs, also called leukocytes, that the body uses to maintain a healthy state and to fight infections or other causes of injury. They are neutrophils, lymphocytes, basophils, eosinophils, and monocytes. They are present in the blood at relatively stable numbers. These numbers may temporarily shift higher or lower depending on what is going on in the body. For instance, an infection can stimulate the body to produce a higher number of neutrophils to fight off bacterial infection. With allergies, there may be an increased number of eosinophils. An increased number of lymphocytes may be produced with a viral infection. In certain disease states, such as leukemia, abnormal (immature or mature) white cells rapidly multiply, increasing the WBC count.

Red Blood Cells- are also called erythrocytes, are produced in the bone marrow and released into the bloodstream as they mature. They contain hemoglobin, a protein that transports oxygen throughout the body. The typical lifespan of an RBC is 120 days; thus the bone marrow must continually produce new RBCs to replace those that age and disintegrate or are lost through bleeding. A number of conditions can affect the production of new RBCs and/or their lifespan, in addition to those conditions that may result in significant bleeding.

The CBC determines the number of RBCs and amount of hemoglobin present, the proportion of blood made up of RBCs (hematocrit), and whether the population of RBCs appears to be normal. RBCs normally are uniform with minimal variations in size and shape; however, significant variations can occur with conditions such as vitamin B12 and folate deficiencies, iron deficiency, and with a variety of other conditions. If the concentration of red blood cells and/or the amount of hemoglobin in the blood drops below normal, a person is said to have anemia and may have symptoms such as fatigue and weakness. Much less frequently, there may be too many RBCs in the blood (erythrocytosis or polycythemia). In extreme cases, this can interfere with the flow of blood through the small veins and arteries.

Platelets- are also called thrombocytes, are special cell fragments that play an important role in normal blood clotting. A person who does not have enough platelets may be at an increased risk of excessive bleeding and bruising. An excess of platelets can cause excessive clotting or, if the platelets are not functioning properly, excessive bleeding. The CBC measures the number and size of platelets present.


CBC Panel
If Results Are Too High Or Too Low
What Is The Possible Cause?

Chemistry Panel Or Metabolic Panel
If Results Are Too High Or Too Low
What Is The Possible Cause?

Lipid Panel
If Results Are Too High Or Too Low
What Is The Possible Cause?

The lipid panel is a collection of tests measuring different types of cholesterol and triglycerides (fats) in your bloodstream.


Mineral Panel
If Results Are Too High Or Too Low
What Is The Possible Cause?
Some Macro Mineral Are Included In A Metabolic Panel

Vitamin Panel
If Results Are Too High Or Too Low
What Is The Possible Cause?

Thyroid Panel
If Results Are Too High Or Too Low
What Is The Possible Cause?

While not part of the standard blood panel, some doctorsI often order thyroid tests for patients, especially if they report fatigue and weight gain, or weight loss and feelings of nervousness or hyperactivity. Some physicians dismiss borderline low or high tests, but these can be very helpful for identifying problems with the thyroid gland. Here are the ranges to look for in thyroid tests. If your test shows you are below the minimum numbers, you may be suffering from hypothyroidism, or low thyroid. If your scores are above the normal range, you may have an overly active thyroid, or hyperthyroidism. In either case, your physician can advise you on appropriate medication.

There are quite a few more tests available, but the ones included here are among the most common.

To get accurate readings, be sure to follow your doctor's instructions in preparing for tests. You may, for example, be asked not to eat and to drink only water for anywhere from a few hours to 12 hours beforehand. Please follow these instructions, or your results may be skewed, requiring additional tests or even unnecessary medications.

If you don't understand something in your results, remember it's okay to ask questions. Doctors are busy people, but you are entitled to the information. If your doctor can't provide it, ask the nurse or physician's assistant for help.

Knowing where you stand with these important parameters is essential for being proactive and owning your own health.


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