Functional electrical stimulation cycling-based muscular evaluation method in mechanically ventilated patients.

Area of Science:

• Intensive care medicine
• Neuromuscular physiology
• Rehabilitation technology

Background:

• Intensive care acquired muscle weakness is prevalent in critically ill patients.
• Functional electrical stimulation cycling (FES-cycling) offers a potential nonvolitional method for evaluating this weakness.

Purpose of the Study:

• To determine if FES-cycling can identify muscle dysfunctions in critically ill patients.
• To assess the relationship between detected muscle dysfunction and patient survival rates.

Main Methods:

• A prospective observational study involving 29 critically ill patients and 20 healthy controls.
• Measurement of maximum torque, power, and stimulation cost using FES-cycling.
• Six-month follow-up to evaluate survival rates.

Main Results:

• Critically ill patients exhibited lower torque and power, and higher stimulation cost compared to healthy individuals (p < 0.05).
• A lower stimulation cost was significantly associated with increased survival rates (p < 0.05).
• 62% of patients with stimulation cost < 15,371 μC/W survived, versus 7% with cost > 15,371 μC/W.

Conclusions:

• FES-cycling demonstrates high sensitivity and specificity for detecting muscle disorders.
• Critically ill patients present with reduced muscle torque and power, alongside elevated stimulation cost.
• Stimulation cost is a significant predictor of survival, with lower costs indicating better prognosis.