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[Critical polyneuropathy].

E Hund1

  • 1Neurologische Universitätsklinik, Heidelberg. ernst_hund@ukl.uni-heidelberg.de

Anasthesiologie, Intensivmedizin, Notfallmedizin, Schmerztherapie : AINS
|August 3, 1999
PubMed
Summary

Muscle weakness in critically ill patients stems from new neuromuscular disorders, not inactivity. Critical illness polyneuropathy is a frequent cause, impacting recovery and ventilator weaning.

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Area of Science:

  • Neurology
  • Intensive Care Medicine

Context:

  • Critically ill patients in intensive care units (ICUs) often develop muscle weakness and atrophy.
  • This neuromuscular dysfunction was previously attributed to inactivity but is now understood as a de novo condition during ICU stay.

Purpose:

  • To differentiate the causes of neuromuscular weakness in critically ill patients.
  • To highlight critical illness polyneuropathy as a primary cause and discuss differential diagnoses like neuromuscular blockade and myopathies.
  • To explore the unknown pathogenesis of critical illness polyneuropathy and potential therapeutic targets.

Summary:

  • Muscle weakness in ICU patients arises from neuromuscular disorders, particularly critical illness polyneuropathy, rather than disuse.
  • Systemic inflammatory response factors may cause axonal damage, with neurotoxic serum activity potentially reversed by NMDA antagonists.
  • Myopathies can be triggered by exogenous factors like high-dose glucosteroids and muscle relaxants.

Impact:

  • Emphasizes the need for detailed electrodiagnostic studies and potential muscle biopsy for accurate diagnosis and management of ICU-acquired neuromuscular problems.
  • Suggests a shift in understanding the etiology of muscle weakness in critical illness, moving away from disuse to specific neuromuscular pathologies.
  • Provides insights into the potential mechanisms and therapeutic avenues for critical illness polyneuropathy.

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