3D printing of the aortic annulus based on cardiovascular computed tomography: Preliminary experience in pre-procedural planning for aortic valve sizing.
J Cardiovasc Comput Tomogr
; 12(5): 391-397, 2018.
Article
en En
| MEDLINE
| ID: mdl-29857953
ABSTRACT
BACKGROUND:
to determine reliability and reproducibility of measurements of aortic annulus in 3D models printed from cardiovascular computed tomography (CCT) images.METHODS:
Retrospective study on the records of 20 patients who underwent aortic valve replacement (AVR) with pre-surgery annulus assessment by CCT and intra-operative sizing by Hegar dilators (IOS). 3D models were fabricated by fused deposition modelling of thermoplastic polyurethane filaments. For each patient, two 3D models were independently segmented, modelled and printed by two blinded "manufacturers" a radiologist and a radiology technician. Two blinded cardiac surgeons performed the annulus diameter measurements by Hegar dilators on the two sets of models. Matched data from different measurements were analyzed with Wilcoxon test, Bland-Altmann plot and within-subject ANOVA.RESULTS:
No significant differences were found among the measurements made by each cardiac surgeon on the same 3D model (pâ¯=â¯0.48) or on the 3D models printed by different manufacturers (pâ¯=â¯0.25); also, no intraobserver variability (pâ¯=â¯0.46). The annulus diameter measured on 3D models showed good agreement with the reference CCT measurement (pâ¯=â¯0.68) and IOH sizing (pâ¯=â¯0.11). Time and cost per model were model creation â¼10-15â¯min; printing time â¼60â¯min; post-processing â¼5min; material cost â¼1.CONCLUSION:
3D printing of aortic annulus can offer reliable, not expensive patient-specific information to be used in the pre-operative planning of AVR or transcatheter aortic valve implantation (TAVI).Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Válvula Aórtica
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Estenosis de la Válvula Aórtica
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Prótesis Valvulares Cardíacas
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Tomografía Computarizada por Rayos X
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Reemplazo de la Válvula Aórtica Transcatéter
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Modelación Específica para el Paciente
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Impresión Tridimensional
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Modelos Cardiovasculares
Tipo de estudio:
Observational_studies
/
Prognostic_studies
/
Risk_factors_studies
Límite:
Aged
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Aged80
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Female
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Humans
/
Male
Idioma:
En
Revista:
J Cardiovasc Comput Tomogr
Asunto de la revista:
ANGIOLOGIA
/
CARDIOLOGIA
/
RADIOLOGIA
Año:
2018
Tipo del documento:
Article
País de afiliación:
Italia