Textured Balloon Surface for Cutting Blade Adhesion
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Solution Overview
Problem
Conventional cutting balloons face issues with inadequate bonding between blades and balloons, leading to potential de-bonding during procedures, balloon perforation, and unwanted movement during PTCA/PTA, which can result in ineffective vessel revascularization and increased risk of complications.
Innovation Solution
The creation of non-smooth surface textures on both the inflatable balloon and mounting pads to enhance bonding strength, prevent perforation, and improve traction, using techniques like laser photolithography and sandblasting to form knurling or nodular patterns, ensuring strong adhesion and stability during use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a smooth surface is used on the balloon and blade pad, then the device is easy to manufacture, but the bonding strength between blade pad and balloon is inadequate
Solution Approach 1:
The patent applies local quality by creating a textured surface only on the bonding interface between the blade pad and balloon, while the rest of the balloon remains smooth. This localized texturing enhances adhesion where needed without complicating the entire manufacturing process. The textured zone is specifically positioned at the bonding surface to maximize bond strength.
Solution Approach 2:
The patent changes the surface parameter from smooth to textured by controlling the expansion of a parison in a mold with a textured cavity. This parameter change transforms the bonding surface properties to enhance adhesion. The texturing process modifies surface roughness and creates mechanical interlocking features that improve bonding strength.
2Ease of operation
If the balloon surface is made smooth, then the balloon is easy to manufacture, but the traction between balloon and lesion is insufficient causing slippage
Solution Approach 1:
The patent applies local quality by texturing only the portion of the balloon surface that contacts the lesion, while maintaining smooth surfaces in other areas. This localized approach provides enhanced traction at the treatment site without complicating the overall manufacturing process. The textured zone is positioned to maximize contact with the arterial wall during inflation.
Solution Approach 2:
The patent changes the surface parameter from smooth to textured to improve traction. The texturing process creates surface irregularities that increase friction and prevent slippage between the balloon and the arterial wall during the cutting and dilation process.
3Reliability
If the balloon surface is smooth, then manufacturing is simple, but the risk of blade perforating the balloon is higher
Solution Approach 1:
The patent applies local quality by creating a textured surface specifically on the bonding interface and potentially on the outer surface where blade contact occurs. This localized texturing provides reinforcement against blade perforation without requiring complex manufacturing processes throughout the entire balloon structure.
Solution Approach 2:
The patent changes the surface parameter from smooth to textured to enhance perforation resistance. The texturing process creates a more robust surface structure that better withstands the mechanical stress and sharp edges of cutting blades, reducing the risk of perforation during assembly and use.
4Strength
If adhesive is used to bond blade pad to balloon, then assembly is simple, but the bond is inadequate due to smooth surfaces
Solution Approach 1:
The patent applies local quality by texturing only the bonding interface where the adhesive contacts the balloon surface. This localized approach enhances adhesive bond strength without adding complexity to the entire device structure. The textured zone is specifically positioned to maximize adhesive bonding effectiveness.
Solution Approach 2:
The patent changes the surface parameter from smooth to textured to improve adhesive bond strength. The texturing process creates surface irregularities that increase the effective bonding area and create mechanical interlocking features, allowing the adhesive to bond more effectively to the textured surface.
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
The textured surfaces provide a stronger bond between the blades and balloon, reducing the risk of de-bonding and perforation, and enhance traction with the arterial wall, ensuring effective and stable balloon positioning and function during procedures.
Implementation Method 1
The textured surface provides more surface area than a similarly sized smooth surface, and accordingly, a stronger bond is obtained between the inflatable balloon and the mounting pad
Implementation Method 2
In one embodiment, the exposed surface of the inflatable balloon is formed with a plurality of nodules that prevent the incising elements from puncturing the inflatable balloon
Implementation Method 3
using techniques like laser photolithography and sandblasting to form knurling or nodular patterns
Data Source
AI summary
A cutting balloon for use in PTCA and PTA procedures and methods for manufacturing cutting balloons are disclosed. One or more surfaces of the cutting balloon are formed with a non-smooth surface texture to improve adhesion between cutting blades and the inflatable balloon, to improve traction between the cutting balloon and the arterial wall, or to prevent inadvertent balloon perforation by a cutting blade. Textures, which can include a knurling texture and a nodular texture can be formed on the inflatable balloon surface directly using laser ablation. Alternatively, the texture can be formed on a mold surface used to mold the inflatable balloon from a parison. Mold surfaces can be textured using a laser photolithography process, sandblasting or a high-speed tool such as a diamond saw.