How can the correct platelet count on a patient be determined when his or her platelets repeatedly clump in an EDTA specimen?

Question

Quizplus · Accepted Answer

When platelet clumping repeatedly occurs in an EDTA blood,the blood should be drawn in a sodium citrate tube.The dilution of blood by the anticoagulant is 9:10 (9 parts blood to 1 part anticoagulant).The platelet count obtained on this tube must therefore be multiplied by the reciprocal of the dilution (10/9)= 1.1.

How Can the Correct Platelet Count on a Patient Be