Association of preoperative muscle composition of the lower extremity with gait function after total knee arthroplasty

Yasuda, Tadashi; Honda, Shintaro; Matsunaga, Kazuhiro; Hashimura, Takumi; Tsukamoto, Yoshihiro; Ota, Satoshi; Fujita, Satoshi; Onishi, Eijiro

doi:10.1016/j.jos.2021.10.001

Cited by 1 publication

(7 citation statements)

References 28 publications

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“…1. IMAT was defined as the summation of the areas of both LDL and mFAT [17,18]. As shown in our previous study [17], the intra-class correlation coefficient (ICC) was 0.98-0.99 for muscle composition measurement.…”

Section: Muscle Compositionmentioning

confidence: 82%

“…IMAT was defined as the summation of the areas of both LDL and mFAT [17,18]. As shown in our previous study [17], the intra-class correlation coefficient (ICC) was 0.98-0.99 for muscle composition measurement. The area of TM or each component was normalized for the square of the patient's height (cm 2 /m 2 ).…”

Section: Muscle Compositionmentioning

confidence: 82%

“…Thus, the upper portion of the gluteus maximus was evaluated almost exclusively at this level. Those muscle groups were manually outlined and thereafter automatically segmented based on attenuation values: − 29 to 150 Hounsfield units (HU) using SYNAPSE VINCENT software (version 5.0, Fujifilm Co., Tokyo, Japan), according to our previous study [17]. The software electronically calculated the cross-sectional area, in cm 2 , of the segmented total muscle group (TM).…”

Section: Muscle Compositionmentioning

confidence: 99%

“…Intramuscular fat (mFAT) shows the lowest CT density. Cross-sectional areas of LMM, in cm 2 , LDL, and mFAT within each TM were measured electronically with the software as the areas of pixels according to the definition by attenuation values: 30 to 80 HU for LMM, 0 to 29 HU for LDL, and − 190 to − 30 HU for mFAT [17,18]. Representative images are shown in Fig.…”

Section: Muscle Compositionmentioning

confidence: 99%

“…The area of TM or each component was normalized for the square of the patient's height (cm 2 /m 2 ). Alternatively, LMM, LDL, mFAT, and IMAT were normalized for the size of respective muscle by calculating a percentage of each measure relative to TM [17,18], designated as LMM/TM, LDL/TM, mFAT/TM, and IMAT/ TM. Because alterations in the place of muscle section by hip deformity may affect cross-sectional CT analysis, this study excluded patients with hip deformity of Crowe types 2, 3, and 4.…”

Section: Muscle Compositionmentioning

confidence: 99%

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Association of preoperative variables of ipsilateral hip abductor muscles with gait function after total hip arthroplasty: a retrospective study

et al. 2022

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Background This study aimed to identify the association of preoperative variables of ipsilateral hip abductors with gait function after total hip arthroplasty (THA). Methods This study enrolled 42 patients who underwent unilateral primary THA for osteoarthritis. Gait speed and Timed Up-and-Go test were conducted 6 months postoperatively. Preoperative composition of the glutei medius and minimus and the upper portion of gluteus maximus was evaluated by computed tomography. Cross-sectional area ratio of individual composition to the total muscle was calculated. Preoperative variables associated with gait speed and Timed Up-and-Go test after THA were identified by using stepwise regression analysis. Results Faster gait speed and shorter Timed Up-and-Go test correlated with smaller cross-sectional area of low-density lean tissue or intramuscular adipose tissue (low-density lean tissue plus intramuscular fat) in the glutei medius and minimus and lower cross-sectional area ratio of low-density lean tissue to the total glutei medius and minimus. Faster gait speed and shorter Timed Up-and-Go test also correlated with larger cross-sectional area of lean muscle mass in the gluteus maximus, higher cross-sectional area ratio of lean muscle mass to the total gluteus maximus, and lower cross-sectional area ratio of intramuscular fat or intramuscular adipose tissue to the total gluteus maximus. Faster gait speed additionally correlated with larger total cross-sectional area of the gluteus maximus. Regression analysis showed that the total cross-sectional area of the gluteus maximus and the low-density lean tissue cross-sectional area of the glutei medius and minimus were the explanatory variables of gait speed and Timed Up-and-Go test after THA, respectively. Conclusions There was a potential association between preoperative composition of ipsilateral hip abductors and gait function 6 months after THA. This study indicates a predictive role of preoperative assessment of ipsilateral hip abductor composition in the recovery of gait function after THA.

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Section: Muscle Compositionmentioning

confidence: 82%