I have high haemocrit (57%) and high haemoglobin (180) due to secondary polycythemia Vera which consultant says is due to sleep apnoea and have been using CPAP for a year but it continues to rise slowly.

i also have a raised monocyte count (every blood test done since 2019 => 0.97) although to my kind these are explainable (influenza, multi-organ failure, chest infections, pacemaker fitted, shoulder operation, throat infection. Etc.

as a result of the raised monocyte count, I  had a bone marrow biopsy, And this is appeared to reveal abnormalities in the white cells which I understand to be the presence of blasts. The consultant did not provide a detailed percentage of the blast in my blood, and I have been put onto a watch white protocol for the CMML.

Since I have a high red blood cell count, one of these suggestions made previously was venesection, Which was done prior to a shoulder operation in December however, did not go Well, resulting in nine attempts a period of three weeks to get around 750 mL of blood.

The consultant has said That he is not going to repeat the venesection, and as a result is therefore not treating the secondary polycythemia vera.

This decision concerns me since I understand that high haemocrit can lead to A higher likelihood of pulmonary embolism etc.

Whilst I would be far from enthusiastic about further attempts of Venesection, My question is if I was to have this could it help reduce the overall percentage of blasts in my blood and thus extend the period where no further action is required?