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Finite element analysis for mechanics of guiding catheters in transfemoral intervention
Wei Wang1, Zhenping Wan1, Boxi Wu1
1School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, China.
Insights
Finite element analysis reveals optimal guiding catheter design for percutaneous coronary intervention. Larger outer diameter and wall thickness enhance backup support, while specific angles and contact lengths improve performance during transfemoral intervention.
Area of Science:
- Biomedical Engineering
- Medical Device Design
- Interventional Cardiology
Background:
- Percutaneous coronary intervention (PCI) relies on guiding catheters for successful lesion access.
- Guiding catheter mechanics are complex, challenging traditional analytical and experimental study.
- Finite element method (FEM) offers a novel approach to analyze guiding catheter performance.
Purpose of the Study:
- To investigate the influence of geometric parameters on guiding catheter backup support during transfemoral intervention (TFI).
- To develop and validate a finite element model for predicting guiding catheter mechanics.
- To provide design recommendations for optimizing guiding catheter backup support.
Main Methods:
- A finite element model was developed incorporating guiding catheter geometry, material properties, and boundary conditions.
- Experimental validation was performed using an arterial tree model to measure backup force.
- Analysis focused on guiding catheter engagement and disengagement from the ostium.
Main Results:
- Increased outer diameter and wall thickness of the guiding catheter positively correlate with greater backup support.
- Recommended outer diameter range is 2.0–2.3 mm for optimal performance.
- Design considerations include avoiding angles (α) between 60°–75° and maintaining a contact length of 5–12 mm.
Conclusions:
- The finite element method effectively analyzes guiding catheter backup support in TFI.
- Geometric parameters significantly influence guiding catheter performance.
- This study provides valuable insights for the design and optimization of guiding catheters for interventional procedures.
Background:
During the percutaneous coronary intervention (PCI), the strong backup support of a guiding catheters is essential in reaching a target coronary lesion successfully. Nevertheless, it is difficult to explore the mechanics of a guiding catheter by analytical and experimental methods due to its complex deformation and interactions among guiding catheter, guide wire, and artery. In this study, the finite element method was used to analyze the backup support of a guiding catheter in transfemoral intervention (TFI).
Methods:
A finite element model was established in the light of geometric, mechanical properties of the guiding catheter and boundary con ditions. To validate the finite element model, an arterial tree model was constructed to measure the backup force of the guiding catheters in TFI. Then, the process of the guiding catheter disengaged from the ostium was analyzed.
Results:
The influencing rules of the geometric parameters of the guiding catheter on its backup support in TFI were obtained with the help of the finite element model. The result shows that the larger the outer diameter and wall thickness, the greater the backup support, 2.0 to 2.3 mm of the outer diameter was suggested. When designing a guiding catheter, it is wise to avoid α, the angle between the line and wall of the artery, being within 60° and 75° and it is a better choice if the contact length is between 5 and 12 mm.
Conclusions:
This study sought to investigate the influencing rules of the geometric parameters of the guiding catheter on its backup support in transfemoral intervention. A finite element model for analyzing the backup support of a guiding catheter was validated by experiments. It indicated that the finite element method can analyze the varied laws of the guiding catheter with different geometric parameters.
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