Force Characterization of Intracranial Endovascular Embolization

Lamano, Jonathan B.; Bushnell, Grace G.; Chen, Hongyu; Badrinathan, Avanti; Tecle, Najib E. El; Bendok, Bernard R.; Glucksberg, Matthew R.

doi:10.1227/neu.0000000000000525

Cited by 10 publications

(13 citation statements)

References 15 publications

(34 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study, the contact force was greater when the catheter tip was placed in the deeper area of the aneurysm. This tendency is consistent with that reported by Lamano et al 11) In particular, the contact force was markedly greater when the catheter tip was placed around the aneurysmal dome (top). The following two proposed reasons for this are as followed:…”

Section: Discussionsupporting

confidence: 92%

Evaluation of Contact Force between Aneurysm Model and Coil for Embolization of Intracranial Aneurysms

Takashima

Ikeda

Yoshinaka

et al. 2021

JNET

View full text Add to dashboard Cite

To ensure safe coil embolization for intracranial aneurysms, it is important to investigate the contact force between the coil and the aneurysm wall. However, it is unclear how the catheter tip position and the diameter of the secondary loop of the coil influence the contact force. In this study, we measured the contact force between a coil and an aneurysm biomodel under different conditions. Methods: A commercially available coil was inserted through a microcatheter into a silicone rubber aneurysm model at a constant speed (1 mm/s) using an automatic stage, and the contact force between the coil and the aneurysm wall was measured by a force sensor attached on the aneurysm model. The inner diameter of the spherical aneurysm was 5 mm. The effects of varying the position of the catheter tip (near dome, center, near neck) and the diameter of the secondary coil (4.5 mm) were evaluated. Results: When the catheter tip was inserted more deeply into the aneurysm (especially near the dome), the contact force increased. The contact force also increased as the secondary coil diameter was increased with the catheter tip near and in the center of the dome. Conclusion: These results suggest that the catheter tip position and the secondary coil diameter affect the contact force. In particular, the contact force should be considered large with the catheter tip near the dome to ensure safe coil deployment. Keywords▶ cerebral aneurysm, coil embolization, contact force, phantom, first coil This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives International License.

show abstract

Section: Discussionsupporting

confidence: 92%

Evaluation of Contact Force between Aneurysm Model and Coil for Embolization of Intracranial Aneurysms

Takashima

Ikeda

Yoshinaka

et al. 2021

JNET

View full text Add to dashboard Cite

show abstract

“…4, there was a large difference in the average contact force when the catheter tip was near the aneurysm dome (top position). This is the same tendency that was reported in previous studies (Lamano et al, 2014;Takashima et al, 2021). As shown in Fig.…”

Section: Resultssupporting

confidence: 92%

“…Various methods have been applied to investigate coil and microcatheter behavior using numerical analysis (Chiang et al, 2013;Fujimura et al, 2018;Morales et al, 2013;Otani et al, 2015;Takashima et al, 2017Takashima et al, , 2014Takashima et al, , 2009Takashima et al, , 2007Takashima et al, , 2006Toma et al, 2017). Moreover, experiments using blood vessel biomodels made of silicone rubber (Haraguchi et al, 2013;Ikeda et al, 2005;Matsunaga et al, 2017;Nagano et al, 2010;Takashima et al, 2021), acryl (Lamano et al, 2014) or poly (vinyl alcohol) hydrogel (PVA-H) (Haga et al, 2020;Kosukegawa et al, 2008;Ohta et al, 2004;Takashima et al, 2017Takashima et al, , 2014, mimicking living tissue, have been conducted. An experiment without a biomodel, in which a delivery wire was inserted into a microcatheter, has also been conducted (Shintai et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…An experiment without a biomodel, in which a delivery wire was inserted into a microcatheter, has also been conducted (Shintai et al, 2019). On the other hand, although excessive stress on the aneurysm wall appears to be the major cause of intraoperative rupture of the aneurysm, few studies have assessed the state of contact between a coil and an aneurysm (Lamano et al, 2014). A previous study found a difference between the coil insertion force and the contact force of a coil on the aneurysmal dome using an aneurysm model (Lamano et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of effect of aneurysm model material on coil contact force and catheter movement

Oishi

Takashima

Yoshinaka

et al. 2022

JBSE

View full text Add to dashboard Cite

To ensure safe coil embolization for cerebral aneurysms, it is important to investigate the contact force between a coil and an aneurysm wall. Therefore, in our previous study, we developed an experimental system for measuring the contact force between a coil and an aneurysm biomodel. However, because the aneurysm model was made of silicone rubber, its physical properties, such as the friction coefficient, differed from those of aneurysms in vivo. Therefore, in this study, we made an aneurysm model using poly (vinyl alcohol) hydrogel (PVA-H) and evaluated the effect of the model material on the contact force. In addition, we acquired images during the experiment and evaluated the behavior of the coil and catheter and the relationship between the catheter movement and the contact force. A commercially available coil was inserted through a catheter into two types of aneurysm models (silicone rubber and PVA-H), and the effects of the model material and the catheter tip position (near dome, at the center, and near neck) were evaluated. The contact force and the total movement of the catheter tip for the PVA-H model were smaller than those for the silicone rubber model. The contact force (total catheter movement) was greater (smaller) when the catheter tip was inserted deeper into the silicone rubber model. These results suggest that the state of contact between the aneurysm and the coil affects the contact force and the catheter movement and that these two values are related.

show abstract

“…The first coil plays an important role in determining the stability of intra-aneurysmatic embolization system [ 8 – 12 ]. Appropriate first coil can provide an enough space for subsequent coils and prevent embolization system from displacement [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

A deep-learning system to help make the surgical planning of coil embolization for unruptured intracranial aneurysms

Nie,

Yang,

Liu

et al. 2023

Chin Neurosurg Jl

View full text Add to dashboard Cite

Background Coil embolization is a common method for treating unruptured intracranial aneurysms (UIAs). To effectively perform coil embolization for UIAs, clinicians must undergo extensive training with the assistance of senior physicians over an extended period. This study aimed to establish a deep-learning system for measuring the morphological features of UIAs and help the surgical planning of coil embolization for UIAs. Methods Preoperative computational tomography angiography (CTA) data and surgical data from UIA patients receiving coil embolization in our medical institution were retrospectively reviewed. A convolutional neural network (CNN) model was trained on the preoperative CTA data, and the morphological features of UIAs were measured automatically using this CNN model. The intraclass correlation coefficient (ICC) was utilized to examine the similarity between the morphologies measured by the CNN model and those determined by experienced clinicians. A deep neural network model to determine the diameter of first coil was further established based on the CNN model within the derivation set (75% of all patients) using neural factorization machines (NFM) model and was validated using a validation set (25% of all patients). The general match ratio (the difference was within ± 1 mm) between the predicted diameter of first coil by model and that used in practical scenario was calculated. Results One-hundred fifty-three UIA patients were enrolled in this study. The CNN model could diagnose UIAs with an accuracy of 0.97. The performance of this CNN model in measuring the morphological features of UIAs (i.e., size, height, neck diameter, dome diameter, and volume) was comparable to the accuracy of senior clinicians (all ICC > 0.85). The diameter of first coil predicted by the model established based on CNN model and the diameter of first coil used actually exhibited a high general match ratio (0.90) within the derivation set. Moreover, the model performed well in recommending the diameter of first coil within the validation set (general match ratio as 0.91). Conclusion This study presents a deep-learning system which can help to improve surgical planning of coil embolization for UIAs.

show abstract

Force Characterization of Intracranial Endovascular Embolization

Cited by 10 publications

References 15 publications

Evaluation of Contact Force between Aneurysm Model and Coil for Embolization of Intracranial Aneurysms

Evaluation of Contact Force between Aneurysm Model and Coil for Embolization of Intracranial Aneurysms

Evaluation of effect of aneurysm model material on coil contact force and catheter movement

A deep-learning system to help make the surgical planning of coil embolization for unruptured intracranial aneurysms

Contact Info

Product

Resources

About