SCV 213: Platelets and Reticulocytes

Platelet Count Normal Ranges

Feline and Canine: 200,000 uL

How to count platelets

Add total numbers of platelets counted in 10 random fields and divide by 10 to get the average

Platelet count formula

Average platelets x 20,000 = _______ /μl

Normal ranges for Reticulocytes

Feline: 0-1.5%

Canine: 0.4-10%

Relative count for reticulocytes

𝑇𝑜𝑡𝑎𝑙 𝑟𝑒𝑡𝑖𝑐𝑢𝑙𝑜𝑐𝑦𝑡𝑒𝑠 𝑐𝑜𝑢𝑛𝑡𝑒𝑑 (𝑆𝑙𝑖𝑑𝑒 1+𝑆𝑙𝑖𝑑𝑒 2) / 1000 × 100 = % reticulocytes

Absolute count for reticulocytes

% Reticulocytes x Total RBC count (10⁶/μL) x 10 = ______________10/L

What type of reticulocyte is this?

Punctate - more mature, secondary forms of immature red blood cells, not used as indicator of active bone marrow regeneration

What type of reticulocyte is this?

Aggregate - Younger, freshly released from the bone marrow, indicator of active bone marrow regeneration