A 55-year-old man on ICU has been on mechanical ventilation for 14 days. The physiotherapy team performs an inspiratory muscle strength assessment usi...

Question

A 55-year-old man on ICU has been on mechanical ventilation for 14 days. The physiotherapy team performs an inspiratory muscle strength assessment using maximum inspiratory pressure (MIP, also called PImax). His MIP is -18 cmH2O (normal ≤-80 cmH2O in men). What does this indicate?

Accepted Answer

Severe inspiratory muscle weakness (MIP less negative than -25 to -30 cmH2O indicates clinically significant weakness) - this contributes to weaning failure and should prompt interventions including inspiratory muscle training, nutritional optimisation, and identification of reversible causes

Answer

Normal inspiratory muscle strength

Answer

MIP cannot be measured in ventilated patients

Answer

The patient is ready for extubation

Answer

MIP only measures diaphragm function

uk-fficm MCQ (SBA): Inspiratory Muscle Weakness

A 55-year-old man on ICU has been on mechanical ventilation for 14 days. The physiotherapy team performs an inspiratory muscle strength assessment using maximum inspiratory pressure (MIP, also called PImax). His MIP is -18 cmH2O (normal ≤-80 cmH2O in men). What does this indicate?