Bedside Ultrasound Assessment to Detect Muscle Loss in Critically Ill Children

Area of Science:

• Pediatric Critical Care Medicine
• Diagnostic Imaging
• Muscle Physiology

Background:

• Critically ill children often experience rapid muscle loss, leading to intensive care unit (ICU)-acquired weakness and prolonged ventilation.
• Early identification of muscle wasting is crucial for timely interventions to improve outcomes.

Purpose of the Study:

• To assess the feasibility and inter-rater reliability of using bedside muscle ultrasonography to detect muscle loss in critically ill pediatric patients.
• To explore associations between muscle loss and potential risk factors.

Main Methods:

• A prospective cohort study involving critically ill children (aged 2-18 years) requiring invasive mechanical ventilation for over 24 hours.
• Serial ultrasound assessments of quadriceps femoris muscle thickness and cross-sectional area were conducted.
• Risk factors including corticosteroid use, nutritional status, and inflammation markers were recorded.

Main Results:

• Muscle loss, defined as ≥10% decrease in muscle mass, was detected in 40% of patients via muscle thickness and 57% via cross-sectional area.
• Muscle wasting occurred 3-10 days into critical illness and mechanical ventilation.
• Lower protein intake and higher C-reactive protein levels were significantly associated with muscle loss.

Conclusions:

• Bedside muscle ultrasonography is a feasible and practical tool for early detection of muscle loss in critically ill children.
• Its noninvasive and portable nature supports integration into routine ICU monitoring.
• Further multicenter studies are needed to confirm these findings and guide interventions.