Hematocrit Basic Information Definition The percentage of blood volume made up of erythrocytes Synonym(s) Packed cell volume Typical Normal Range (US Units; SI Units) 27% to 43% (0.27–0.43 L/L) Physiology Causes of Abnormally High Levels: An increase in hematocrit is called erythrocytosis (a previous term now falling into disfavor is polycythemia). An increase in hematocrit is usually a relative increase (does not involve an actual increase in the red cell mass of the body) due to dehydration, endotoxemia, or splenic contraction occurring in association with excitement or exercise. Absolute increases (these involve increased production of erythrocytes) are rare in horses, except perhaps those that train at high elevations. See the section on erythrocytosis for more detail. Next Diagnostic Step to Consdier if Levels High If dehydration is present, reevaluate the hematocrit following rehydration. If the animal is excited or has been exercising, recheck the hematocrit when the animal is calm. See Erythrocytosis in this section for more detail.< div class='tao-gold-member'> Only gold members can continue reading. Log In or Register to continue Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Related posts: Aggressive Stallion Behavior Aflatoxin Toxicosis Biliary Atresia Black Widow Spider Toxicosis Stay updated, free articles. Join our Telegram channel Join Tags: Clinical Veterinary Advisor The Horse Jul 24, 2016 | Posted by admin in SMALL ANIMAL | Comments Off on Hematocrit Full access? Get Clinical Tree
Hematocrit Basic Information Definition The percentage of blood volume made up of erythrocytes Synonym(s) Packed cell volume Typical Normal Range (US Units; SI Units) 27% to 43% (0.27–0.43 L/L) Physiology Causes of Abnormally High Levels: An increase in hematocrit is called erythrocytosis (a previous term now falling into disfavor is polycythemia). An increase in hematocrit is usually a relative increase (does not involve an actual increase in the red cell mass of the body) due to dehydration, endotoxemia, or splenic contraction occurring in association with excitement or exercise. Absolute increases (these involve increased production of erythrocytes) are rare in horses, except perhaps those that train at high elevations. See the section on erythrocytosis for more detail. Next Diagnostic Step to Consdier if Levels High If dehydration is present, reevaluate the hematocrit following rehydration. If the animal is excited or has been exercising, recheck the hematocrit when the animal is calm. See Erythrocytosis in this section for more detail.< div class='tao-gold-member'> Only gold members can continue reading. Log In or Register to continue Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Related posts: Aggressive Stallion Behavior Aflatoxin Toxicosis Biliary Atresia Black Widow Spider Toxicosis Stay updated, free articles. Join our Telegram channel Join Tags: Clinical Veterinary Advisor The Horse Jul 24, 2016 | Posted by admin in SMALL ANIMAL | Comments Off on Hematocrit Full access? Get Clinical Tree
