The effect of patient body mass index and sex on the magnification factor during pre-operative templating for total hip arthroplasty.
Calibration
Digital templating
King Mark
Total hip arthroplasty
TraumaCad
Journal
SICOT-J
ISSN: 2426-8887
Titre abrégé: SICOT J
Pays: France
ID NLM: 101675099
Informations de publication
Date de publication:
2023
2023
Historique:
received:
17
02
2023
accepted:
12
04
2023
medline:
17
5
2023
pubmed:
17
5
2023
entrez:
17
5
2023
Statut:
ppublish
Résumé
Pre-operative templating prior to hip arthroplasty has traditionally used implant-company-provided acetates, which assumed a magnification factor between 115% and 120%. In recent years, pre-operative planning has been performed with digital calibration devices, in order to calculate the magnification factor. However, these devices are not without their limitations and are not readily available at many institutions. As previous reports suggest a wide range of magnification factors, the determination of an optimal magnification factor is currently unclear. We investigated the relationship between obesity and gender on the magnification factor in order to improve the accuracy of pre-operative templating. Ninety-seven consecutive pre-operative calibrated pelvic radiographs using the KingMark calibration were analyzed using the TraumaCad templating software. The magnification factor calculated by the software was considered the true magnification factor and analysis was made in order to assess the effect of sex and body mass index (BMI) on the magnification factor. A linear regression analysis was utilized to create a predictive model for optimal magnification factor value. Magnification factor was significantly affected by sex (male, 120.0% vs. female 121.2%, p < 0.01) and by categorized BMI (obese 121.8% vs. non-obese 119.9%, p < 0.001). A positive linear association was found between BMI and the magnification factor (r = 0.544). The magnification factor was significantly different between the following sub-groups: obese female, non-obese female, obese male, and non-obese male (p < 0.001). When applying the model formulated by the linear regression analysis, the calculated magnification factor was within 2% of the true magnification factor for the majority of patients (n = 83, 85.6%). BMI and gender have a significant effect on the magnification factor. Future determination of the magnification factor should consider the influence of these variables in order to improve the accuracy of pre-operative templating in THA.
Identifiants
pubmed: 37195151
doi: 10.1051/sicotj/2023009
pii: sicotj230018
pmc: PMC10191110
doi:
Types de publication
Journal Article
Langues
eng
Pagination
13Subventions
Organisme : Internal Funding
ID : na
Informations de copyright
© The Authors, published by EDP Sciences, 2023.
Références
J Arthroplasty. 2005 Jan;20(1):51-8
pubmed: 15660060
Hip Pelvis. 2016 Dec;28(4):201-207
pubmed: 28097109
Can J Surg. 2009 Feb;52(1):6-11
pubmed: 19234645
J Bone Joint Surg Br. 1998 May;80(3):382-90
pubmed: 9619923
PLoS One. 2015 Jul 13;10(7):e0128529
pubmed: 26168410
J Bone Joint Surg Br. 2009 Sep;91(9):1217-22
pubmed: 19721050
Hip Int. 2012 Jan-Feb;22(1):82-9
pubmed: 22344481
J Bone Joint Surg Br. 2010 Jan;92(1):136-41
pubmed: 20044692
Open Access Maced J Med Sci. 2019 Feb 23;7(4):672-685
pubmed: 30894933
J Arthroplasty. 1992;7 Suppl:403-9
pubmed: 1431923
J Orthop. 2018 Aug 24;15(4):931-934
pubmed: 30197473
Ann R Coll Surg Engl. 2005 Jan;87(1):53-4
pubmed: 15720909
Int Orthop. 2019 Aug;43(8):1799-1805
pubmed: 30132182
Ann R Coll Surg Engl. 2008 Oct;90(7):592-6
pubmed: 18831869