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Objectives:

To critically evaluate and summarize identified evidence for the use of ultrasound to measure peripheral skeletal muscle architecture during critical illness.

Data Sources:

Seven electronic databases (Medline, Cumulative Index to Nursing and Allied Health Literature, Cochrane Library, Physiotherapy Evidence Database, Scopus, Excerpta Medica Database, and Web of Science [including Science Citations and Conference Proceedings]) and personal libraries were searched for relevant articles. Cross-referencing further identified references.

Study Selection:

Quantitative study designs excluding abstracts, published in English, including adult critically ill patients in the ICU, evaluating peripheral skeletal muscle architecture during critical illness with ultrasound were included. Studies using ultrasonographic muscle data as outcome measures in interventional trials were excluded.

Data Extraction:

Performed by …