The ratio of the white blood cell count to mean platelet volume can provide prognostic information in some conditions with an acute phase reaction.


(1) white blood cell (WBC) count in 10^9/L

(2) mean platelet volume (MPV) in femtoliters (normal 9-12 fL)


ratio =

= (WBC count) / (MPV)



An increased ratio on admission for ST-segment AMI is associated with a worse outcome.

An increased ratio is associated with critical limb ischemia in a patient with peripheral arterial disease.

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