Does Goryaev's chamber have the same grid layout as the conventional counting chamber used in the West?
From the description at http://cldtest.ru/hdbk/chamber 

It appears to be functionally the same device, except the only the smallest square are marked (0.25 nL and 4 nL), and the total capacity is 90 nL instead of 100 nL. A hemocytometer could be used in place of a Goryaev's chamber (though not necessarily the reverse).