RESUMO
<p><b>OBJECTIVE</b>To assess the therapeutic effect, timing of administration, complication prevention and management of the double filtration plasmapheresis (DFP) in the treatment of refractory myasthenia gravis (MG).</p><p><b>METHODS</b>Thirty-one patients with refractory MG were treated with KM 8800 membrane plasmapheresis monitor. DFP was performed every 3 days and the exchanging liquid was composed of 50 ml of 20% albumen and 1000 ml plasma substitute. Physical examination for absolute clinical score and blood sample was collected for AchR-Ab determination early in the morning on days 0, 3, 7, 14 of DFP.</p><p><b>RESULTS</b>With a total effective rate of 91.9%, complete recovery, basic recovery, improvement, and response was achieved in 2, 4, 11, and 17 patients, respectively, whereas the other 3 failed to respond. Hypotension occurred twice in 2 cases and was corrected after symptomatic treatment.</p><p><b>CONCLUSION</b>DFP may effectively lower blood AchR-Ab level of with minimal complications, and can be valuable for treatment of refractory MG.</p>