Does Femoral Rotation Influence Anteroposterior Alpha Angle, Lateral Center-edge Angle, and Medial Proximal Femoral Angle? A Pilot Study

Monazzam, Shafagh; Bomar, James D.; Agashe, Mandar; Hosalkar, Harish S.

doi:10.1007/s11999-012-2708-6

Cited by 16 publications

(8 citation statements)

References 37 publications

(60 reference statements)

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“…12,17,18,21 Plain radiographs are subject to varying degrees of rotation that may affect the accuracy of alpha angle measurements. 22 For the alpha angle to be considered a credible radiographic indicator, it must be reliable. The authors found that with varying degrees of femoral rotation the alpha angle ranged from 39--621.…”

Section: Discussionmentioning

confidence: 99%

Interrater and intrarater reliability of the alpha angle of the hip

Barlow

Reem²,

Stanley

et al. 2014

Current Orthopaedic Practice

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Background:The purpose of the study was to determine the inter-and intrarater reliability of the alpha angle measured on hip axial and axial oblique MRI, which has not been well defined in the existing orthopaedic literature. Methods:Fifty MRIs were reviewed by one musculoskeletal radiologist and two orthopaedic hip surgeons. The examiners evaluated the alpha angle measurements in two rounds. In each round, the three examiners independently reviewed all MRIs in random order to establish intrarater and interrater reliability. Correlation coefficients were calculated between pairs of alpha angle readings. Results:The pooled intrarater reliability when testing all 50 MRIs was 0.78 indicating strong agreement. The pooled intrarater reliability for only axial oblique images was 0.85, indicating almost perfect agreement. The interclass correlation coefficients for all 50 MRIs was 0.63--0.75, indicating strong agreement. The pooled interrater reliability using only the axial oblique images was 0.84, demonstrating near perfect agreement. Conclusions:The alpha angle is a reliable measure when calculated on axial oblique MRI. Our study indicates that almost perfect agreement exists when measuring the alpha angle on axial oblique MRI.

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Section: Discussionmentioning

confidence: 99%

Interrater and intrarater reliability of the alpha angle of the hip

Barlow

Reem²,

Stanley

et al. 2014

Current Orthopaedic Practice

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“…Por esse motivo, Clohisy et al 37 sugeriram que a distância entre o bordo superior da sínfise púbica e a extremidade do cóccix deve ser de 1 cm a 3 cm. Variações no grau de rotação do quadril também podem prejudicar a avaliação da morfologia do fêmur proximal, 42 enfatizando a importância de radiografias padronizadas.…”

Section: Radiografiaunclassified

“…Therefore, Clohisy et al 37 suggested that the distance between the upper edge of the pubic symphysis and the end of the coccyx should be between 1 cm and 3 cm. Variations in the degree of hip rotation may also impair the assessment of the morphology of the proximal femur, 42 emphasizing the importance of standardized radiographs.…”

Section: Introductionmentioning

confidence: 99%

Impacto femoroacetabular e lesão do lábio acetabular – Parte 2: Diagnóstico clínico, exame físico e imagiologia

Polesello

Eisjman

Queiroz

et al. 2020

Rev Bras Ortop (Sao Paulo)

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ResumoO diagnóstico clínico do impacto femoroacetabular continua a evoluir conforme o entendimento dos quadris normal e patológico progride. Impacto femoroacetabular é atualmente definido como uma síndrome na qual o diagnóstico se baseia no somatório de uma história clínica abrangente obtida previamente, seguida de um exame físico coerente e padronizado com manobras ortopédicas específicas. Além disso, exames radiográficos e tomográficos são usados para a avaliação morfológica do quadril, e para verificar a existência de sequelas de doenças do quadril da infância e a presença de osteoartrose. O entendimento da morfologia e versão femoral e acetabular associado às imagens de lesões labrais e osteocondrais obtidas com a ressonância magnética contribuem para a confirmação da síndrome nos pacientes sintomáticos, além de auxiliar na exclusão de diagnósticos diferenciais, como ressalto do tendão do músculo iliopsoas, impacto subespinhal, impacto isquiofemoral, e outras patologias da articulação do quadril.

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“…These measurements have been shown to have good inter-observer reliability with radiologists assessing plain films [ 17 ]; however, the reliability of using plain film radiographs was brought into question by Barton et al [ 23 ], who felt that measurements on plain films were not adequately validated to 3D MRI. A pilot study using a single cadaveric specimen, looked at X-ray images taken at seven different degrees of hip rotation and found that each additional degree of internal rotation produced a reciprocal reduction in the medial proximal femoral angle by 0.36° and the α angle by 0.18° [ 24 ]. This suggests that care should be exercised while designing protocols for obtaining radiographs in each department to ensure rotation of the hip is kept as constant as possible.…”

Section: What Are the Predictors For Progression To Oa In Fai?mentioning

confidence: 99%

Can hip arthroscopy in the presence of arthritis delay the need for hip arthroplasty?

Viswanath

Khanduja

2017

Journal of Hip Preservation Surgery

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Hip arthroscopy for joint preservation surgery has grown immensely over the last two decades. There is now an increasing trend to try and expand the role of hip arthroscopy to include patients of an older age or perhaps even with signs of arthritis, instead of the established patient group of young adults with mechanical symptoms or serious athletes. But how much of this growth is really justified? Once arthritis is apparent, the arthroscopic procedures needed to try and limit progression of the disease are likely to be different to those needed in young adult non-arthritic hips. Similarly, the expectation of results following an arthroscopic procedure in an older adult with arthritis must also be different. With an almost 5-fold increase in conversion rate from arthroscopy to arthroplasty in the over 50s population, arthroscopy in arthritis is a different procedure, with a different outcome, to arthroscopy in young adults with no evidence of osteoarthritis. This article takes a closer inspection at outcomes following hip arthroscopy in the older population particularly in those with evidence of early arthritis. This paper does not attempt to make recommendations in other diagnoses such as inflammatory arthritis or other secondary arthritides. It must be considered that hip arthroscopy is not a benign intervention: as well as the surgical risks, the lengthy rehabilitation period should be factored into the equation. Although the nature of surgeons is to find new techniques and push boundaries, we highlight the need for caution in undertaking arthroscopic intervention when arthritis is already apparent at presentation.

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Does Femoral Rotation Influence Anteroposterior Alpha Angle, Lateral Center-edge Angle, and Medial Proximal Femoral Angle? A Pilot Study

Cited by 16 publications

References 37 publications

Interrater and intrarater reliability of the alpha angle of the hip

Interrater and intrarater reliability of the alpha angle of the hip

Impacto femoroacetabular e lesão do lábio acetabular – Parte 2: Diagnóstico clínico, exame físico e imagiologia

Can hip arthroscopy in the presence of arthritis delay the need for hip arthroplasty?

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