Critical illness weakness: Common questions

Summary Weakness is a common problem in patients requiring intensive care unit management. Critical illness polyneuromyopathy is a useful term to describe the acquired neuropathy and/or myopathy that develops in the setting of critical illness. There is a broad differential diagnosis and although most cases can be diagnosed clinically, a range of investigations may be required. The principal risk factors are systemic inflammatory response syndrome (particularly due to severe sepsis), corticosteroid and neuromuscular blocking drug administration and hyperglycaemia. Treatment remains largely supportive, emphasizing the importance of preventative strategies. This article will answer common questions pertaining to critical illness weakness.