Validation of a 3D-printed model of cryptoglandular perianal fistulas.
3D printing
Fistula-in-ano
Perianal fistula
Journal
Techniques in coloproctology
ISSN: 1128-045X
Titre abrégé: Tech Coloproctol
Pays: Italy
ID NLM: 9613614
Informations de publication
Date de publication:
27 May 2024
27 May 2024
Historique:
received:
15
09
2023
accepted:
31
03
2024
medline:
27
5
2024
pubmed:
27
5
2024
entrez:
27
5
2024
Statut:
epublish
Résumé
Visualising the course of a complex perianal fistula on imaging can be difficult. It has been postulated that three-dimensional (3D) models of perianal fistulas improve understanding of the perianal pathology, contribute to surgical decision-making and might even improve future outcomes of surgical treatment. The aim of the current study is to investigate the accuracy of 3D-printed models of perianal fistulas compared with magnetic resonance imaging (MRI). MRI scans of 15 patients with transsphincteric and intersphincteric fistulas were selected and then assessed by an experienced abdominal and colorectal radiologist. A standardised method of creating a 3D-printed anatomical model of cryptoglandular perianal fistula was developed by a technical medical physicist and a surgeon in training with special interest in 3D printing. Manual segmentation of the fistula and external sphincter was performed by a trained technical medical physicist. The anatomical models were 3D printed in a 1:1 ratio and assessed by two colorectal surgeons. The 3D-printed models were then scanned with a 3D scanner. Volume of the 3D-printed model was compared with manual segmentation. Inter-rater reliability statistics were calculated for consistency between the radiologist who assessed the MRI scans and the surgeons who assessed the 3D-printed models. The assessment of the MRI was considered the 'gold standard'. Agreement between the two surgeons who assessed the 3D printed models was also determined. Consistency between the radiologist and the surgeons was almost perfect for classification (κ = 0.87, κ = 0.87), substantial for complexity (κ = 0.73, κ = 0.74) and location of the internal orifice (κ = 0.73, κ = 0.73) and moderate for the percentage of involved external anal sphincter in transsphincteric fistulas (ICC 0.63, ICC 0.52). Agreement between the two surgeons was substantial for classification (κ = 0.73), complexity (κ = 0.74), location of the internal orifice (κ = 0.75) and percentage of involved external anal sphincter in transsphincteric fistulas (ICC 0.77). Our 3D-printed anatomical models of perianal fistulas are an accurate reflection of the MRI. Further research is needed to determine the added value of 3D-printed anatomical models in preoperative planning and education.
Identifiants
pubmed: 38801550
doi: 10.1007/s10151-024-02925-3
pii: 10.1007/s10151-024-02925-3
doi:
Types de publication
Journal Article
Validation Study
Comparative Study
Langues
eng
Sous-ensembles de citation
IM
Pagination
59Informations de copyright
© 2024. Springer Nature Switzerland AG.
Références
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