Critical illness neuromuscular syndromes

Area of Science:

• Neurology
• Intensive Care Medicine
• Clinical Electrophysiology

Background:

• Critical illness neuromyopathy (CINM) is the most frequent peripheral neuromuscular disorder in intensive care units (ICUs).
• It typically presents as diffuse limb weakness, predominantly proximal, after the acute illness phase resolves.
• CINM can affect both peripheral nerves and muscles, with isolated muscle involvement increasingly recognized.

Purpose of the Study:

• To summarize the key features and contributing factors of critical illness neuromyopathy.
• To highlight the diagnostic implications of electrophysiological findings in CINM.
• To emphasize the impact of CINM on respiratory muscle function and patient outcomes.

Main Methods:

• Review of clinical presentations and electrophysiological findings in CINM.
• Analysis of factors contributing to the development of CINM in critically ill patients.
• Discussion of the role of muscle and nerve involvement in CINM.

Main Results:

• CINM is characterized by bilateral, diffuse weakness, primarily affecting proximal muscles.
• Electrophysiological studies, including direct muscle stimulation, increasingly detect muscle involvement in CINM.
• Respiratory muscle weakness due to CINM can lead to prolonged mechanical ventilation (MV) and delayed weaning.

Conclusions:

• CINM is a significant complication in critically ill patients, impacting recovery and respiratory function.
• Factors such as muscle immobilization, sepsis-induced multiple organ failure, hyperglycemia, and corticosteroid use may contribute to CINM.
• Recognizing CINM is crucial for appropriate management and improving outcomes for ICU survivors.