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. 2022 May 23;30(3):e243763.
doi: 10.1590/1413-785220223003e243763. eCollection 2022.

INFLUENCE OF FEMORAL OFFSET ON FUNCTIONAL CAPACITY OF PATIENTS WITH TOTAL HIP ARTHROPLASTY

Bruna de Moraes Lopes  1 , Leandro de Freitas Spinelli  2   3 , Carlos Roberto Galia  4 , Carlos Roberto Schwartsmann  5 , Marcelo Faria Silva  1
Affiliations

INFLUENCE OF FEMORAL OFFSET ON FUNCTIONAL CAPACITY OF PATIENTS WITH TOTAL HIP ARTHROPLASTY

Bruna de Moraes Lopes et al. Acta Ortop Bras. .

Abstract
in English, Portuguese

Objective: To correlate vertical (VFO) and horizontal (HFO) femoral offset with hip range of motion (ROM), peak muscle torque (PT), functional, capacity, and lower limb length in patients with total hip arthroplasty (THA).

Methods: A cross-sectional case control study, in which 22 individuals (10 men and 12 women) - aged 61 (41-72), and within 23 (10-40) postoperative days - were evaluated for active hip ROM (fleximetry); Isometric PT (portable dynamometer); functional capacity (Timed up and Go test (TUG) and Harris Hip Score questionnaire); lower limb length (measuring tape); and VFO and HFO (radiographs).

Results: The operated limb showed a reduction in length (p = 0.006), ROM for abduction (p = 0.001), flexion (p = 0.003), and external rotation (p = 0.003), as well as in all PT (p < 0.05) when compared with the contralateral limb. Moderate correlations were observed between VFO and external rotators (r = 0.487; p = 0.021); HFO and external rotators PT (r = -0.508; p = 0.016); and the difference between the VFO (operated and non-operated limb) and the TUG (r = -0.570; p = 0.006).

Conclusion: Changes to the femoral offset seem to influence functional capacity, as well as the movement and external rotators PT of the hips in patients with THA, considering the postoperative period evaluated. Level of Evidence III, Case Control Study.

Objetivo: Correlacionar achados do offset femoral vertical (OFV) e horizontal (OFH) aos da amplitude de movimento do quadril (ADM), pico de torque muscular (PT), capacidade funcional (CF) e comprimento dos membros inferiores (CM) em pacientes com artroplastia total de quadril (ATQ).

Métodos: Estudo transversal, caso controle (nível de evidência III), foram avaliados 22 indivíduos (10 homens e 12 mulheres) com idade de 61 (41-72) anos e 23 (10-40) dias de pós-operatório, quanto à: ADM ativa do quadril (fleximetria); PT isométrico (dinamômetro portátil); CF - teste Timed up and Go (TUG) e questionário Harris Hip Score (HHS); CM (fita métrica); e OFV e OFH a partir de radiografias.

Resultados: O membro operado apresentou redução no CM (p = 0,006), ADM de abdução (p = 0,001), flexão (p = 0,003) e RE (p = 0,003), e em todos os PT (p < 0,05) em comparação ao membro contralateral. Correlações moderadas encontradas entre: OFV e RE (r = 0,487; p = 0,021); OFH e PT dos RE (r = −0,508; p = 0,016);e a diferença do OFV (membro operado e não operado) e o TUG (r = −0,570; p = 0,006).

Conclusão: Alterações no OF parecem influenciar a CF, bem como o movimento e o PT dos RE do quadril em pacientes com ATQ para o período pós-operatório avaliado. Nível de Evidência III, Estudo de Caso-Controle.

Keywords: Arthroplasty, Replacement, Hip; Hip Injuries; Muscle Strength.

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Conflict of interest statement

All authors declare no potential conflict of interest related to this article.

Figures

Figure 1
Figure 1. Range of motion assessment positions.
Figure 2
Figure 2. Muscle torque assessment positions.
Figure 3
Figure 3. Femoral offset.
See this image and copyright information in PMC

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