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Article: Radiological Assessment of Femoral Rotation: A Cadaveric Study

TitleRadiological Assessment of Femoral Rotation: A Cadaveric Study
股骨旋轉的放射學評估:屍體標本研究
Authors
KeywordsCadaveric Study
Femoral Rotation
Radiological Assessment
Issue Date2012
PublisherElsevier (Singapore) Pte Ltd. The Journal's web site is located at http://www.ejotr.org
Citation
Journal Of Orthopaedics, Trauma And Rehabilitation, 2012, v. 16 n. 1, p. 22-25 How to Cite?
AbstractPurpose: To define how the lesser trochanter can be used in an objective manner to assess the femoral rotation in plain radiograph. Methods: Eighteen pairs of cadaveric femurs from Chinese individuals were used in this study. For each femur, radiographs were taken in the following positions with reference to the anatomical transepicondylar axis: neutral position; 5°, 10°, 15°, and 20° internal rotation; and 5°, 10°, 15°, and 20° external rotation. Lesser-trochanter index, which was defined as the width of lesser trochanter divided by the remaining width of the proximal femur, measured at the level of its most prominent point, which was perpendicular to the anatomical axis of the proximal femur, was obtained on a Picture Archiving Communication System workstation in every radiograph. Statistical analyses were performed by using a statistical software R (R language, version 2.12.0). Results: The lesser-trochanter index showed positive correlation with increasing external rotation of femur: correlation coefficient = 0.75 (p<0.00001). Analysis-of-variance test showed that the lesser-trochanter indexes of Group 1 (20° and 15° internal rotation), Group 2 (10° internal rotation to 10° external rotation), and Group 3 (15° and 20° external rotation) had statistically significant differences (p<0.00001). Receiver operating characteristic curves were used to determine the cutoff value of lesser-trochanter index to distinguish the three groups. By using the lower cutoff value as 0.17, we can distinguish Group 2 from Group 1 with a sensitivity of 0.85 and a specificity of 0.65. By using the upper cutoff value as 0.28, we can distinguish Group 2 from Group 3 with a sensitivity of 0.80 and a specificity of 0.73. Conclusion: The lesser-trochanter index can be used as a method to assess the rotational alignment of femur in plain radiograph. It is simple, objective, not affected by the factor of magnification, and can be applied to both long and short films. © 2012.
Persistent Identifierhttp://hdl.handle.net/10722/170194
ISSN
2015 SCImago Journal Rankings: 0.106
References

 

DC FieldValueLanguage
dc.contributor.authorLie, WHCen_US
dc.contributor.authorChiu, KYen_US
dc.contributor.authorNg, TPen_US
dc.date.accessioned2012-10-30T06:06:01Z-
dc.date.available2012-10-30T06:06:01Z-
dc.date.issued2012en_US
dc.identifier.citationJournal Of Orthopaedics, Trauma And Rehabilitation, 2012, v. 16 n. 1, p. 22-25en_US
dc.identifier.issn2210-4917en_US
dc.identifier.urihttp://hdl.handle.net/10722/170194-
dc.description.abstractPurpose: To define how the lesser trochanter can be used in an objective manner to assess the femoral rotation in plain radiograph. Methods: Eighteen pairs of cadaveric femurs from Chinese individuals were used in this study. For each femur, radiographs were taken in the following positions with reference to the anatomical transepicondylar axis: neutral position; 5°, 10°, 15°, and 20° internal rotation; and 5°, 10°, 15°, and 20° external rotation. Lesser-trochanter index, which was defined as the width of lesser trochanter divided by the remaining width of the proximal femur, measured at the level of its most prominent point, which was perpendicular to the anatomical axis of the proximal femur, was obtained on a Picture Archiving Communication System workstation in every radiograph. Statistical analyses were performed by using a statistical software R (R language, version 2.12.0). Results: The lesser-trochanter index showed positive correlation with increasing external rotation of femur: correlation coefficient = 0.75 (p<0.00001). Analysis-of-variance test showed that the lesser-trochanter indexes of Group 1 (20° and 15° internal rotation), Group 2 (10° internal rotation to 10° external rotation), and Group 3 (15° and 20° external rotation) had statistically significant differences (p<0.00001). Receiver operating characteristic curves were used to determine the cutoff value of lesser-trochanter index to distinguish the three groups. By using the lower cutoff value as 0.17, we can distinguish Group 2 from Group 1 with a sensitivity of 0.85 and a specificity of 0.65. By using the upper cutoff value as 0.28, we can distinguish Group 2 from Group 3 with a sensitivity of 0.80 and a specificity of 0.73. Conclusion: The lesser-trochanter index can be used as a method to assess the rotational alignment of femur in plain radiograph. It is simple, objective, not affected by the factor of magnification, and can be applied to both long and short films. © 2012.en_US
dc.languageengen_US
dc.publisherElsevier (Singapore) Pte Ltd. The Journal's web site is located at http://www.ejotr.org-
dc.relation.ispartofJournal of Orthopaedics, Trauma and Rehabilitationen_US
dc.subjectCadaveric Studyen_US
dc.subjectFemoral Rotationen_US
dc.subjectRadiological Assessmenten_US
dc.titleRadiological Assessment of Femoral Rotation: A Cadaveric Studyen_US
dc.title股骨旋轉的放射學評估:屍體標本研究-
dc.typeArticleen_US
dc.identifier.emailChiu, KY:pkychiu@hkucc.hku.hken_US
dc.identifier.authorityChiu, KY=rp00379en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.jotr.2011.07.003en_US
dc.identifier.scopuseid_2-s2.0-84858078978en_US
dc.identifier.hkuros208371-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84858078978&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume16en_US
dc.identifier.issue1en_US
dc.identifier.spage22en_US
dc.identifier.epage25en_US
dc.publisher.placeSingapore-
dc.identifier.scopusauthoridLie, WHC=26534696300en_US
dc.identifier.scopusauthoridChiu, KY=7202988127en_US
dc.identifier.scopusauthoridNg, TP=24438193400en_US

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