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Updated: Oct 2, 2025
Manual Muscle Testing: A Method of Measuring Extremity Muscle Strength Applied to Critically Ill Patients
Published on: April 12, 2011
Quantification of changes in functional capacity and muscle strength in patients: a burn intensive care unit cohort
Mayara Manzoni Marques da Silva1, Cristiane de Fatima Travensolo2, Vanessa Suziane Probst1
1Postgraduation Program in Rehabilitation Sciences UEL-UNOPAR, State University of Londrina (UEL), Londrina, PR, Brazil.
Background:
Regular functional status and muscle strength assessments should be performed with burn victims.
Objective:
To evaluate the functionality and peripheral muscle strength of burn patients admitted to the hospital.
Methods:
A longitudinal and prospective study was conducted from March to November 2019, including adult burn victims who were admitted to the ICU and discharged from the hospital. Patients were assessed on admission, every 10 days, at discharge from the ICU and from the hospital. Functionality was assessed using the Chelsea Critical Care Physical Assessment (CPAx) and the Functional Independence Measure (FIM). Muscle strength was assessed using the Medical Research Council (MRC) scale and handgrip dynamometry.
Results:
41 patients were included, 27 men and 14 women, with a median age of 41 (IQR [28-56]) years, mean TBSA of 19 (SD ± 12) percent, mean Abbreviated Burn Severity Index (ABSI) of 6 (SD ± 2) and the mean ICU time was 29 (SD ± 9) days. The CPAx, FIM and MRC evaluations improved (P < 0.0001) when compared to admission to the ICU and at hospital discharge, while the dynamometry showed no statistical difference. The ABSI only showed an association with the length of stay.
Conclusion:
The CPAX scale was sensitive to changes in functionality throughout the hospital stay in severely burned patients, in the present study. The assessment of global muscle strength was more sensitive than handgrip strength and the ABSI was associated with length of stay in this population.
