Reagent

150 mg of Toluidine blue dissolve in PBS buffer.

Hank's solution (Difco)

PBS buffer: phosphate buffered saline solution (Sigma)

Technique

1. In a test tube, add 3 drops of sediment.
2. Add 1 ml of PBS buffer or Hank's solution (Difco)
3. add 1 or 2 drops of stain depending on cellularity
4. Centrifuge
5. Aspirate the added fluid volume and read

Results

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