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Skeletal Muscle Composition Predicts Outcome in Critically Ill Patients
Sven H Loosen1,2, Maximilian Schulze-Hagen3, Tobias Püngel1
1Department of Medicine III, University Hospital Rheinisch-Westfälische Technische Hochschule Aachen, Aachen, Germany.
Critical Care Explorations
|August 25, 2020
Summary
Skeletal muscle index and myosteatosis measured by CT scans can predict long-term survival in critically ill patients. Lower values indicate reduced survival, aiding early clinical decisions.
Area of Science:
- Critical care medicine
- Radiology
- Body composition analysis
Background:
- Body composition parameters are prognostic in various conditions.
- Limited data exist on their value in critical illness.
- Skeletal muscle mass and myosteatosis are key components of body composition.
Purpose of the Study:
- To evaluate the prognostic value of skeletal muscle mass and myosteatosis in critically ill patients.
- To assess these parameters at ICU admission.
- To determine their association with patient outcomes.
Main Methods:
- Exploratory observational cohort study at an academic medical institution.
- Included 155 critically ill patients admitted to the ICU.
- Assessed skeletal muscle index (sarcopenia surrogate) and myosteatosis (muscle attenuation) using routine CT scans.
Main Results:
- Higher skeletal muscle index and attenuation were associated with long-term survival.
- Parameters below established cutoffs (74.95 mm²/cm and 29 HU) significantly reduced overall survival.
- Myosteatosis correlated with mechanical ventilation duration, hospital stay, and sepsis presence.
Conclusions:
- Sarcopenia and myosteatosis are significant prognostic factors in critically ill patients.
- These parameters are easily obtainable from routine CT scans.
- They provide valuable information for early clinical decision-making regarding long-term outcomes.
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