Anatomical axis validation of lower extremity for different deformities: A radiological study.
Lower extremity alignment
knee axis
knee deformity
knee radiograph
orthoroentgenogram
Journal
SAGE open medicine
ISSN: 2050-3121
Titre abrégé: SAGE Open Med
Pays: England
ID NLM: 101624744
Informations de publication
Date de publication:
2020
2020
Historique:
received:
14
02
2019
accepted:
13
04
2020
entrez:
30
6
2020
pubmed:
1
7
2020
medline:
1
7
2020
Statut:
epublish
Résumé
The aim of this study was to derive a pure, unbiased, reliable and accurate objective relationship between the local knee axis measurements through a short knee anteroposterior roentgenogram and the lower limb axis measurement through an orthoroentgenogram. Radiographs of 114 patients (114 knees) were evaluated by two independent raters for measurement of lower limb axis on an orthoroentgenogram and the local knee axis on short knee anteroposterior X-ray, which was derived by cropping the orthoroentgenogram by a blinded radiology assistant. The raters measured at two different time-points separated by an interval of 30-day period. Intra-rater and inter-rater reliabilities were calculated by intra-class correlation coefficients and three models were built to establish the relationships of X-ray anatomical axis with orthoroentgenogram anatomical axis, orthoroentgenogram anatomical axis with orthoroentgenogram mechanical axis and X-ray anatomical axis with orthoroentgenogram mechanical axis. For three different measurements, intra-class correlation coefficients of Rater 2 were higher than 0.90 which shows perfect reliability, while that for Rater 1 was low. Furthermore, first measurements were more consistent than the second measurement. There was a strong positive correlation in all the three models except for varus cases in the last. The standardized correlation derived between the two different techniques for measuring knee alignment is fairly comparable with the studies in the past and would serve as a reliable template for future studies concerning relationships between the two, in addition to helping knee surgeons make more reliable and accurate interpretations through local knee axis measurements.
Identifiants
pubmed: 32595969
doi: 10.1177/2050312120923822
pii: 10.1177_2050312120923822
pmc: PMC7297126
doi:
Types de publication
Journal Article
Langues
eng
Pagination
2050312120923822Informations de copyright
© The Author(s) 2020.
Déclaration de conflit d'intérêts
Declaration of conflicting interests: The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
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