erythrocyte (redirected from erythrocyte sedimentation rate (ESR))

erythrocyte /eryth·ro·cyte/ (ĕ-rith´ro-sīt) red blood cell; corpuscle; one of the formed elements in peripheral blood. Normally, in humans, the mature form is a non-nucleated, yellowish, biconcave disk, containing hemoglobin and transporting oxygen. For immature forms, see erythrocytic series, under series.

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basophilic erythrocyte  an abnormal erythrocyte that takes basic stains, as seen in basophilia.

hypochromic erythrocyte  one that contains less than normal concentration of hemoglobin and as a result appears paler than normal; it is usually also microcytic.

normochromic erythrocyte  one of normal color with a normal concentration of hemoglobin.

polychromatic erythrocyte , polychromatophilic erythrocyte one that, on staining, shows shades of blue combined with tinges of pink.

target erythrocyte  see under cell.

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e·ryth·ro·cyte (-rthr-st)

n.

See red blood cell.

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e·rythro·cytic (-stk) adj.

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Erythrocyte

The name for red blood cells or red blood corpuscles. These components of the blood are responsible for carrying oxygen to tissues and removing carbon dioxide from tissues.

Mentioned in: Hemolytic Anemia

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erythrocyte

[erith′rəsīt′]

Etymology: Gk, erythros + kytos, cell

mature red blood cell; a biconcave disk about 7 μm in diameter that contains hemoglobin confined within a lipoid membrane. It is the major cellular element of the circulating blood and transports oxygen as its principal function. The number of cells per cubic millimeter of blood is usually maintained between 4.5 and 5.5 million in men and between 4.2 and 4.8 million in women. It varies with age, activity, and environmental conditions. For example, an increase to a level of 8 million/mm³ can normally occur at over 10,000 feet above sea level. An erythrocyte normally lives for 110 to 120 days, when it is removed from the bloodstream and broken down by the reticuloendothelial system. New erythrocytes are produced at a rate of slightly more than 1% a day; thus a constant level is usually maintained. Acute blood loss, hemolytic anemia, or chronic oxygen deprivation may cause erythrocyte production to increase greatly. Erythrocytes originate in the marrow of the long bones. Maturation proceeds from a stem cell (promegaloblast) through the pronormoblast stage to the normoblast, the last stage before the mature adult cell develops. Kinds of erythrocytes include the burr cell, discocyte, macrocyte, meniscocyte, and spherocyte. Also called red blood cell (RBC), red cell, red corpuscle. Compare normoblast, reticulocyte. See also erythropoiesis, hemoglobin, red cell indexes.

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erythrocyte (rith´rōsīt),

n a red blood cell; a nonnucleated, circular, biconcave, discoid, hemoglobin-containing, oxygen-carrying formed element circulating in the blood.

erythrocyte count,

n the number of red blood cells per cubic millimeter of blood.

erythrocyte indices,

n.pr the standard values of red blood cell numbers, morphologic characteristics, and behavior in comprehensive hematologic laboratory testing.

erythrocyte sedimentation rate (ESR),

n the rate at which red blood cells settle in a pipette of unclotted blood, measured in millimeters per hour. It is used as an index of inflammation.

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erythrocyte

a red blood cell, or corpuscle; one of the formed elements in the peripheral blood. For immature forms see normoblast, metarubricyte. In most mammals mature erythrocytes are biconcave disks that have no nuclei. The degree of concavity varies between species, as does the size. Birds have nucleated, oval erythrocytes. The cell consists mainly of hemoglobin and a supporting framework, called the stroma. Erythrocyte formation (erythropoiesis) takes place in the red bone marrow in the adult, and in the liver, spleen and bone marrow of the fetus. Erythrocyte formation requires an ample supply of certain dietary elements such as iron, cobalt and copper, amino acids and certain vitamins.

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erythrocyte antigen

see blood group antigen and blood group.

erythrocyte casts

see urinary cast.

erythrocyte count

see blood count.

erythrocyte ghosts

in new methylene blue, erythrocytes fail to take up stain and appear only as a pale outline.

hypochromatic erythrocyte

see hypochromia (2).

erythrocyte indices

calculated values for the mean corpuscular volume (mcv), mean corpuscular hemoglobin (mch), and mean corpuscular hemoglobin concentration (mchc), taken from the hematocrit, hemoglobin concentration and red blood cell count. Used in determining the likely etiology of anemias and other abnormalities of the erythron. Called also mean cell constants.

matchstick erythrocyte

describes the appearance of sickled deer erythrocytes containing hemoglobin II.

normochromic erythrocyte

see normochromia.

erythrocyte refractile bodies (ERF)

a term usually used to describe Heinz bodies in the erythrocytes of cats. Sometimes restricted in definition to the smaller (Heinz) bodies that are normally found in up to 10% of feline erythrocytes, as distinct from larger bodies associated with hemolytic anemia.

erythrocyte sedimentation rate (ESR)

an expression of the extent of settling of erythrocytes in a column of fresh citrated or otherwise treated blood, per unit of time. Of greatest diagnostic value in dogs as horses normally have a greatly accelerated rate and ruminants show none except in very extreme circumstances. In the dog, ESR is elevated with inflammatory processes. See also sedimentation rate.

erythrocyte tonicity

the degree of distention of the erythrocyte. This is dependent on the osmotic pressure of the cell's contents compared with that of the plasma. If it is greater, water will pass into the cell and it may rupture. If it is less, water passes out of the cell which shrinks and becomes crenated.

erythrocyte volume

mean corpuscular volume (mcv); see erythrocyte indices (above).

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erythrocyte

RBC, red blood cell, discocyte Hematology A mature, nonnucleated cell averaging 7–8 µm in diameter, which is round or ovoid on peripheral smear, contains Hb and has a zone of central pallor due to the cell's biconcavity. See Fetal erythrocyte.

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Patient discussion about erythrocyte sedimentation rate (ESR).

Q. what is a normal red blood cell count for breast cancer after operation

A. i know that the normal count is between 4.2 to 5.9 million cells/cmm. if you have anything else- i think this question should be to the Doctor...cause even if someone here will tell you it's ok that it's a bit low- the Doctor should know that and he has your chart with all your medical information. there for i would give him a phone call to ask if it's o.k. - unless you are in the normal average i told you, then you shouldn't worry about it.