MCH (mean corpuscular hemoglobin) and MCV (mean corpuscular volume) are two values that are commonly measured during a complete blood count (CBC) test. These values provide important information about the size and amount of hemoglobin in the red blood cells.

MCH is a measure of the amount of hemoglobin in each red blood cell, while MCV is a measure of the average size of the red blood cells. The values are calculated by dividing the total hemoglobin or red blood cell volume by the number of red blood cells.

During a CBC test, a small sample of blood is taken from a vein in the arm and sent to a laboratory for analysis. The test measures the levels of red blood cells, hemoglobin, hematocrit, MCH, and MCV.

Abnormal values for MCH and MCV can provide important information about the health of an individual. For example, high MCH and MCV values can be a sign of macrocytic anemia, a type of anemia caused by a deficiency of vitamin B12 or folic acid. Low MCH and MCV values can be a sign of microcytic anemia, a type of anemia caused by iron deficiency.

MCH and MCV values can also be used to monitor certain medical conditions, such as thalassemia and sickle cell disease, which are inherited blood disorders that affect the production and function of red blood cells.

The normal range for MCH values is typically between 27 and 33 picograms (pg) per cell, while the normal range for MCV values is typically between 80 and 100 femtoliters (fl) per cell. However, normal ranges can vary depending on age, sex, and other factors, and it is important to discuss any abnormal results with a healthcare provider.