Computational fluid dynamics and septal deviations—Virtual surgery can predict post‐surgery results: A preliminary study including two patients

Radulesco, Thomas; Meister, Lionel; Bouchet, Gilles; Varoquaux, A.; Giordano, J.; Dessi, P.; Perrier, Pierre; Michel, J.

doi:10.1111/coa.13495

Cited by 5 publications

(6 citation statements)

References 10 publications

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“…Starting about two decades ago, numerical studies of nasal airflow based on Computational Fluid Dynamics (CFD) began to increase in number and quality. Nowadays, Ear, Nose and Throat (ENT) doctors envisage the use of a detailed CFD solution to diagnose pathologies and to plan surgeries (Radulesco et al, 2020;Singh and Inthavong, 2021). A recent, broad and insightful account of potential and open problems is given by Inthavong et al (2019).…”

Section: Introductionmentioning

confidence: 99%

Importance of the numerical schemes in the CFD of the human nose

Schillaci

Quadrio

2022

Journal of Biomechanics

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Section: Introductionmentioning

confidence: 99%

Importance of the numerical schemes in the CFD of the human nose

Schillaci

Quadrio

2022

Journal of Biomechanics

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“…This method can be used in clinical research and shows great potential for virtual surgery. 22,23 In this study, we set the nasal wall as rigid and airflow and respiratory cycle as constant, which are not in line with practical conditions. This also suggests using CFD as a guide and adding patients' subjective feelings as the evaluation criteria for research.…”

Section: Discussionmentioning

confidence: 99%

“…This method may be more clinically relevant than predicting functional changes only by analysing the changes in anatomical structure. This method can be used in clinical research and shows great potential for virtual surgery 22,23 …”

Section: Discussionmentioning

confidence: 99%

Structural and functional changes of nasal cavity and maxillary sinus in patients with skeletal classIIImalocclusion 1 year after bimaxillary surgery

Liu

Wang

et al. 2022

Orthod Craniofacial Res

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Purpose This study aimed to analyse changes in the nasal cavity and maxillary sinus structure and function in patients with skeletal class III malocclusion 1 year after bimaxillary surgery. Materials and Methods In this study, cone‐beam computed tomography (CBCT) images of 20 patients (10 men and 10 women; mean age 24.3 ± 3.4 years) with skeletal class III malocclusion who underwent Le Fort I osteotomy and bilateral sagittal split osteotomy were obtained before and 1 year after the surgery. CBCT data were stored opened with element 3D (E3D) to establish a nasal airway model (the paranasal sinus includes only the maxillary sinus). Ansys (ANSYS) software is used for simulation and analysis. Results The maxillary sinus and nasal cavity volumes decreased significantly 1 year after the surgery. After surgery, the volume of nasal cavity decreased by 13.5%, and the average volume of maxillary sinus decreased by 7.8%. There was no significant difference in the degree of deviation of the septum and nasal cavity resistance, and air distribution in the maxillary sinus did not change. The nasal cavity wall shear stress change was similar to that before surgery. Conclusions The maxillary sinus volume and nasal cavity volume of patients with skeletal class III malocclusion changed significantly after bimaxillary surgery, but there was no significant change in nasal ventilation function 1 year after surgery.

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“…CFD makes virtual surgery possible (Radulesco et al. 2020 ; Moghaddam et al. 2020 ), by enabling the comparison between the flow in the original (pre-surgery or pre-op) anatomy and the flow in the (post-surgery or post-op) anatomy modified by the surgeon on the computer.…”

Section: Introductionmentioning

confidence: 99%

On the comparison between pre- and post-surgery nasal anatomies via computational fluid dynamics

Segalerba,

Dini Ciacci,

Quadrio

et al. 2023

Biomech Model Mechanobiol

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Nasal breathing difficulties (NBD) are widespread and difficult to diagnose; the failure rate of their surgical corrections is high. Computational fluid dynamics (CFD) enables diagnosis of NBD and surgery planning, by comparing a pre-operative (pre-op) situation with the outcome of virtual surgery (post-op). An equivalent comparison is involved when considering distinct anatomies in the search for the functionally normal nose. Currently, this comparison is carried out in more than one way, under the implicit assumption that results are unchanged, which reflects our limited understanding of the driver of the respiratory function. The study describes how to set up a meaningful comparison. A pre-op anatomy, derived via segmentation from a CT scan, is compared with a post-op anatomy obtained via virtual surgery. State-of-the-art numerical simulations for a steady inspiration carry out the comparison under three types of global constraints, derived from the field of turbulent flow control: a constant pressure drop (CPG) between external ambient and throat, a constant flow rate (CFR) through the airways and a constant power input (CPI) from the lungs can be enforced. A significant difference in the quantities of interest is observed depending on the type of comparison. Global quantities (flow rate, pressure drop and nasal resistance) as well as local ones are affected. The type of flow forcing affects the outcome of the comparison between pre-op and post-op anatomies. Among the three available options, we argue that CPG is the least adequate. Arguments favouring either CFR or CPI are presented.

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Computational fluid dynamics and septal deviations—Virtual surgery can predict post‐surgery results: A preliminary study including two patients

Cited by 5 publications

References 10 publications

Importance of the numerical schemes in the CFD of the human nose

Importance of the numerical schemes in the CFD of the human nose

Structural and functional changes of nasal cavity and maxillary sinus in patients with skeletal classIIImalocclusion 1 year after bimaxillary surgery

On the comparison between pre- and post-surgery nasal anatomies via computational fluid dynamics

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