Selective-Coating Ablation Balloon for Focused Pulmonary Vein Isolation
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Solution Overview
Problem
Existing ablation catheters face inefficiencies in delivering ablative energy to targeted pulmonary vein tissue while minimizing energy loss to the blood pool and unintentional ablation of non-target tissue, leading to issues like pulmonary vein stenosis, phrenic nerve injury, and esophageal damage.
Innovation Solution
The use of an ablation balloon catheter with a combination of coated and uncoated regions, where the uncoated regions facilitate energy transfer to targeted pulmonary vein tissue and the coated regions insulate or reflect energy away from non-target areas, such as the blood pool and other tissues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional ablation catheter delivers ablative energy to pulmonary vein tissue, then tissue ablation is achieved, but energy is lost to the blood pool and non-target tissue causing complications
Solution Approach 1:
The ablation balloon incorporates selective coating on its outer surface, creating regions with different energy transfer properties. The uncoated regions facilitate energy transfer to targeted pulmonary vein tissue, while the coated regions reflect or insulate energy away from non-target areas such as the blood pool and surrounding tissues. This local differentiation of surface properties enables precise control over energy delivery, reducing energy loss and minimizing complications while maintaining effective ablation of the target tissue.
2Manufacturing precision
If ablative energy is delivered to targeted tissue, then lesion formation is achieved, but unintentional ablation of non-target tissue occurs
Solution Approach 1:
The selective coating on the ablation balloon creates spatially differentiated energy transfer characteristics. The uncoated regions are positioned to contact and ablate only the targeted pulmonary vein tissue, while the coated regions prevent energy from reaching adjacent non-target structures. This local quality differentiation ensures that ablation energy is confined to the intended treatment zone, achieving precise lesion formation while preventing unintentional damage to surrounding tissues.
3Productivity
If energy transfer is facilitated to tissue, then ablation effectiveness is improved, but energy transfer to non-target areas increases
Solution Approach 1:
The ablation balloon surface is selectively coated to create zones with contrasting energy transfer properties. The uncoated regions maximize energy transfer to targeted pulmonary vein tissue for effective ablation, while the coated regions simultaneously block energy transfer to non-target areas. This dual-function design ensures that energy is efficiently delivered to the treatment zone while preventing energy loss to surrounding structures, thereby maintaining high ablation effectiveness without increasing energy transfer to non-target areas.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances energy delivery efficiency, reduces the risk of complications by focusing ablative energy on target tissue, minimizing energy loss, and improving the effectiveness and consistency of lesion formation.
Implementation Method 1
The radio frequency coil within the ablation balloon transmits radio frequency waves through the uncoated region of the ablation balloon to ablate tissue in contact with the uncoated region
Implementation Method 2
an uncoated region that facilitates energy transfer between the ablation balloon and tissue in contact with the uncoated region
Implementation Method 3
a coated region that mitigates energy transfer between the ablation balloon and tissue in contact with the coated region
Implementation Method 4
a coated region that mitigates energy transfer between the ablation balloon and tissue in contact with the coated region
Implementation Method 5
The radio frequency coil within the ablation balloon transmits radio frequency waves through the uncoated region of the ablation balloon to ablate tissue in contact with the uncoated region
Data Source
AI summary
The instant disclosure relates to electrophysiology catheters for tissue ablation within a cardiac muscle, for example. In particular, the instant disclosure relates to an electrophysiology ablation balloon catheter with a combination of coated and uncoated surfaces for focusing ablation energy at a desired portion of tissue.