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I. Evaluate the effectiveness of plasma exchange in the treatment of acute severe attacks of inflammatory demyelinating disease in patients who have failed intravenous steroid therapy.
PROTOCOL OUTLINE: This is a randomized, double-blind study. Patients are stratified by disease type; each stratum is randomized separately.
The first group of patients receives a true plasma exchange using continuous-flow centrifugation with serum albumin and crystalloid replacement every 2 days for a total of 7 exchanges.
The second group receives a sham plasma exchange with no centrifugation every 2 days for a total of 7 exchanges.
Patients cross to the alternate therapy if there is less than a moderate improvement by day 14. The treatment decision is based on a blinded neurologic assessment.
Concurrent corticosteroids and other immunosuppressants, and high-dose barbiturates are not allowed.
Patients are followed at 1 and 6 months after the last exchange.
Allocation: Randomized, Endpoint Classification: Efficacy Study, Masking: Double-Blind, Primary Purpose: Treatment
Acute Disseminated Encephalomyelitis
Active, not recruiting
Office of Rare Diseases (ORD)
Published on BioPortfolio: 2014-08-27T03:58:13-0400
Acute disseminated encephalomyelitis is an immune-mediated inflammatory demyelinating disease of the central nervous system, which is typically transitory and self-limiting. It is characte...
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Inflammation of a transverse portion of the spinal cord characterized by acute or subacute segmental demyelination or necrosis. The condition may occur sporadically, follow an infection or vaccination, or present as a paraneoplastic syndrome (see also ENCEPHALOMYELITIS, ACUTE DISSEMINATED). Clinical manifestations include motor weakness, sensory loss, and incontinence. (Adams et al., Principles of Neurology, 6th ed, pp1242-6)
An acute or subacute inflammatory process of the CENTRAL NERVOUS SYSTEM characterized histologically by multiple foci of perivascular demyelination. Symptom onset usually occurs several days after an acute viral infection or immunization, but it may coincide with the onset of infection or rarely no antecedent event can be identified. Clinical manifestations include CONFUSION, somnolence, FEVER, nuchal rigidity, and involuntary movements. The illness may progress to COMA and eventually be fatal. (Adams et al., Principles of Neurology, 6th ed, p921)
Removal of plasma and replacement with various fluids, e.g., fresh frozen plasma, plasma protein fractions (PPF), albumin preparations, dextran solutions, saline. Used in treatment of autoimmune diseases, immune complex diseases, diseases of excess plasma factors, and other conditions.
An experimental animal model for central nervous system demyelinating disease. Inoculation with a white matter emulsion combined with FREUND'S ADJUVANT, myelin basic protein, or purified central myelin triggers a T cell-mediated immune response directed towards central myelin. The pathologic features are similar to MULTIPLE SCLEROSIS, including perivascular and periventricular foci of inflammation and demyelination. Subpial demyelination underlying meningeal infiltrations also occurs, which is also a feature of ENCEPHALOMYELITIS, ACUTE DISSEMINATED. Passive immunization with T-cells from an afflicted animal to a normal animal also induces this condition. (From Immunol Res 1998;17(1-2):217-27; Raine CS, Textbook of Neuropathology, 2nd ed, p604-5)
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