Ann Rehabil Med.  2022 Dec;46(6):303-311. 10.5535/arm.22110.

Correlation of Femoral Muscle Volume Using Three-Dimensional Modeling and Locomotor Function After Unilateral Trans-femoral Amputation

• Yun DH
• Jung IY
• Moon CW
• Cho KH

• KMID: 2537161
• DOI: http://doi.org/10.5535/arm.22110

Abstract

Objective
To evaluate the relationship between femoral muscle volume (FMV) and physiological outcomes after trans-femoral amputations (TFAs) affecting overall locomotor function in patients.
Methods
Seven individuals who underwent TFA and had been using a prosthesis participated in this cross-sectional study. Gait and balance were assessed using clinical tests, such as 10-m walk test, 6-minute walk test, Berg Balance Scale, and automatic balance system. Respiratory gas analysis was performed to check oxygen consumption rate. Five participants were evaluated for bilateral FMV by MR imaging and FMV was reconstructed using three-dimentional remodeling.
Results
In five participants, significant differences were found between the non-involved and involved sides in femur length, total FMV, and functional muscle volume (all p<0.01) in all groups except for the hip adductor volume. The %mean difference between the non-involved and involved sides was 30% for femur length, 52.55% for hip flexor volume, 26.55% for hip adductor volume, 51.86% for hip extensor volume, and 60.21% for knee extensor volume. The hip flexor volume to hip extensor volume ratio in the involved limb and oxygen consumption rate during comfortable gait were negatively correlated (r=-0.96, p=0.04).
Conclusion
In individuals who underwent unilateral TFA, hip girdle muscle imbalance in the involved limbs may be associated with oxygen consumption rate while using a prosthesis.

Keyword

Amputation; Magnetic resonance imaging; Imaging; Three-dimensional; Muscle weakness; Gait; Postural balance

Figure

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  Fig. 1. Three-dimensional modeling based on bilateral femoral magnetic resonance images. Hip flexor indicates shades of green; hip adductor, shades of purple; hip extensor, shades of red; knee extensor, shades of gray.

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  Fig. 2. Correlation of hip flexor/hip extensor volume ratio and oxygen consumption rate. Numbers in graph are same as ID in Table 1.

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