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OBSTETRIC ANESTHESIOLOGY

Obstetric and Anesthetic Management of Severe Congenital Myasthenia Syndrome

Nico Terblanche, MD, FCA(SA)^*, Cynthia Maxwell, MD, FRCPSC, Johannes Keunen, MD, and Jose C. A. Carvalho, MD, PhD, FANZCA, FRCPC^*

From the Departments of *Anesthesia and Pain Management, and Obstetrics and Gynecology, Mount Sinai Hospital, University of Toronto, Toronto, Canada.

Address correspondence to Nico Terblanche, MD, Department of Anesthesia and Pain Management, Mount Sinai Hospital, 600 University Ave., Room 781, Toronto, M5G 1X5. Address e-mail to nicoterblan{at}mweb.co.za.

Abstract

The congenital myasthenia syndromes form a heterogeneous group of genetic diseases characterized by defective neuromuscular transmission. Although they have muscle fatigability in common with the acquired immune myasthenia syndrome, there are important pathophysiological, diagnostic, management and progression pattern differences between them. We report the management of a 28-yr-old patient with longstanding congenital myasthenia syndromes, who underwent an elective cesarean delivery under spinal anesthesia. Muscle imbalance plus weakness-related scoliosis and chronic respiratory failure complicated her management. Ultrasonography was used to facilitate the spinal anesthetic. Intraoperative noninvasive positive pressure ventilation maintained lung volumes effectively and prevented deterioration in respiratory function.

Anesthesia & Analgesia® is published for the International Anesthesia Research Society® by Lippincott Williams & Wilkins with the assistance of Stanford University Libraries' HighWire Press®. Copyright 2006 by the International Anesthesia Research Society. Online ISSN: 1526-7598   Print ISSN: 0003-2999