Plasma Free Catecholamine Level during Hemopurification in a Case of Pheochromocytoma.

To examine the alteration of the plasma free-catecholamine level during hemopurification in a patient with pheochromocytoma, the levels of plasma free-catecholamine and total catecholamine in the filtrate were monitored pre- and post-hemopurification. Approximately 100 micrograms of total catecholamine was removed by the hemopurification procedure though the high level of plasma-free catecholamine remained unaltered.