This is a transient rise (~2h) caused by fear, excitement, pain. Its
most common in horses, less in cats, dogs and ruminants
Not pathogenic
Relative- the most common
This is when the fall in plasma colume allows the RBC to appear
concentrated. This is most commonly associated with dehydration following vomiting, diarrohea, diuresis or reduced fluid intake
The TP (especially albumin) is elevated
Absolute
Primary- independant of EPO stimulation
Neoplas of the BM
Polycythaemia- this is a rare condition when
there is also: thrombocytosis and leukocytoisis
Secondary- this is due to higher EPO concentrations
Appropriate- HYPOXIA
response- Chronic pulmonary dz, high alttude or CV shunts which shunt the blood away from the lungs
Innappropriate-This is pretty rare and is associated with renal cysts or neoplasms