Management of severe pediatric Guillain-Barré syndrome in a low-income country: efficacy and safety of therapeutic plasma exchange in pediatric patients: a retrospective study

Background: Guillain-Barré syndrome (GBS) is an autoimmune disease that affects the peripheral nervous system leading to motor, sensory, and sometimes autonomic manifestations. Therapeutic plasma exchange (TPE), which involves the selective removal of pathological molecules, such as auto-antibodies, from plasma, has proven to be safe and effective in adults with GBS. However, its application in pediatric patients lacks sufficient evidence. This study aims to evaluate the efficacy and safety of TPE in pediatric patients with severe GBS, in a low-resource setting.

Methods: This is a single-center retrospective study of 36 GBS patients aged between 2 and 13 years. A total of 122 TPE sessions were administered, with a median of four sessions per patient. A human albumin solution was the exchange fluid in all the sessions. Clinical improvement was evaluated through general examination and muscle power assessment using the Medical Research Council (MRC) scale.

Results: All patients showed clinical improvement upon treatment with TPE. The grade of power in the upper extremities increased from a mean of 1.7 ± 1.1 at the peak of illness to 3.7 ± 0.9 at discharge, indicating an increase of 2.0 ± 1.1 (95% CI, 1.6 to 2.4, p< 0.001). Alternatively, in the lower extremities, it increased from 1.2 ± 1.1 to 2.5 ± 0.8, indicating a significant rise of 1.4 ± 0.8 (95% CI, 1.1 to 1.6, p< 0.001). There was a significant improvement in the cranial, autonomic, and respiratory functions among all patients. Half of the patients were available for follow-up and showed full recovery, with six of them still exhibiting minimal residual deficits. TPE-related complications were mostly mild or moderate, with tachycardia, hypotension, and mild anemia being the most common. However, serious complications occurred in three of the patients, necessitating the discontinuation of the treatment in two of them. There was no mortality related to TPE in this study.

Conclusions: TPE shows promise in treating pediatric GBS. In this study, TPE was associated with the recovery of neurological functions, yielding positive outcomes with only minimal residual deficits. However, balancing its benefits with potential risks requires careful clinical judgment and rigorous monitoring to ensure patient safety and optimize outcomes. TPE was a more cost-effective and accessible option than IVIG in this financially restricted, low-income setting.