The role of therapeutic plasma exchange using membrane plasma separation in the late onset myasthenic crisis: a case report

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Myasthenia gravis (MG) is an autoimmune disease, in which antibodies bind to receptors in the neuromuscular junction (NMJ), causing muscle weakness. This disease is relatively challenging to diagnose due to its late onset and comorbidities. Several treatment options include therapeutic plasma exchange (TPE) with membrane plasma separation, that aims to remove large molecular-weight toxins such as pathogenic antibodies and lipoproteins. A 61-year-old male patient was admitted to the ICU post-sternotomy due to mediastinal tumor resection. Extubation failed, so we decided to undergo a tracheostomy. The lung pathology result showed lymphocyte-predominant thymoma, and along with symptoms of chest weakness and ptosis, the patient was suspected for MG. Electromyography results confirmed the occurrence of functional lesions in post-synaptic NMJ consistent with MG. We assessed patient with myasthenic crisis (MC), then gave pyridostigmine 60 mg 6x/day, and planned for TPE using membrane plasma separation. Plasma exchange was done by 1.5 of blood volume. The patient developed sepsis pneumonia and was administered levofloxacin based on his culture results. Patient still had weakness. We re-evaluated the drugs that might have exacerbated MG. Aztreonam in combination with co-trimoxazole was administered to combat Stenotrophomonas maltophilia pneumonia. The patient was eventually weaned from the ventilator and gradually recovered. Keywords: Membrane Plasma Separation; Myasthenia Gravis Crisis; Therapeutic Plasma Exchange; TPE Citation: Kurnia D, Manggala SK, Irawany V. The role of therapeutic plasma exchange using membrane plasma separation in the late onset myasthenia gravis crisis: a case report. Anaesth. pain intensive care 2024;28(5):969−973; DOI: 10.35975/apic.v28i5.2557 Received: July 17, 2024; Reviewed: August 01, 2024; Accepted: August 01, 2024

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