Description

A critically-ill patient may develop diaphragm weakness if certain conditions are present. This weakness may negatively impact ventilation and impair weaning from ventilatory support.


Risk factors for critical illness-associated diaphragm weakness:

(1) sepsis

(2) mechanical ventilation, especially after hyperinflation or after prolonged ventilation

(3) malnutrition with protein catabolism

(4) critical illness myopathy

(5) disuse atrophy

(6) medications (sedatives, steroids, neuromuscular blocking agents, other)

(7) neuropathy

(8) reduced oxygen delivery to muscles of the diaphragm

(9) metabolic abnormalities

 

Factors protective against critical illness-associated diaphragm weakness:

(1) obesity


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