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Do Balloon Catheters have a Different Radial Force Along Their Longitudinal Axis?
Tae Won Choi1, Jinoo Kim1, Je Hwan Won2
1Department of Radiology, Ajou University School of Medicine, Ajou University Hospital, Suwon, Republic of Korea.
Cardiovascular and Interventional Radiology
|April 19, 2024
Summary
Radial forces are greater at the ends of balloon catheters compared to the center, particularly the distal end. This finding suggests using the distal end for dilating resistant stenosis is a practical clinical approach.
Area of Science:
- Interventional Cardiology
- Biomedical Engineering
- Medical Device Design
Background:
- Balloon angioplasty is a common procedure for treating stenotic lesions.
- Understanding radial force distribution is crucial for optimizing angioplasty outcomes.
- Variations in radial force along the balloon catheter may affect dilation efficacy.
Purpose of the Study:
- To compare the radial forces exerted by the central portion versus the ends of balloon catheters during stenosis dilation.
- To evaluate differences in radial force distribution among various balloon catheter models.
Main Methods:
- Three types of balloon catheters (Mustang, Conquest, Genoss PTA) with varying diameters and lengths were tested.
- A 3D-printed module created a 20% stenosis model for radial force measurement.
- Radial forces at the center, proximal, and distal ends of the balloon were measured at rated burst pressure.
Main Results:
- Radial force was consistently higher at both ends compared to the central portion of the balloon catheters.
- The distal end exhibited greater radial force than the center, with increases ranging from 7.4% to 35.2% across different catheters.
- The proximal end also showed increased radial force compared to the center, ranging from 7.3% to 10.8%.
Conclusions:
- Balloon catheters generate greater radial force at their distal and proximal ends than at the center.
- The distal end's higher radial force is particularly pronounced, suggesting its utility in treating resistant stenosis.
- Utilizing the distal end for dilation is a clinically applicable strategy, especially with semi-compliant balloons, without requiring additional devices.
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