Micropatterned Balloon Surface for Implant Tissue Anchoring
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Solution Overview
Problem
Existing medical devices face challenges with surgical complications, infection, electrical noise, and implant failure due to wire-based communication and radiofrequency telemetry, which also result in low-efficiency transmission through biological tissue.
Innovation Solution
The development of a patterned balloon device with a radially expandable balloon featuring a patterned outer surface to increase friction with surrounding tissues, reducing the likelihood of implant displacement and enhancing secure anchoring within the body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a patterned balloon device is inserted into a body lumen to provide anchoring, then the anchoring force is improved, but the device complexity increases due to the need for micropatterning on the balloon surface
Solution Approach 1:
The balloon surface is micropatterned with an array of protrusions that create a porous-like structure, increasing surface area and friction with surrounding tissue to enhance anchoring force without requiring complex mechanical anchoring mechanisms
Solution Approach 2:
The invention transitions from a smooth 2D balloon surface to a 3D micropatterned surface with protrusions, adding vertical dimension to the anchoring mechanism through controlled surface topography rather than complex structural design
2Force
If micropatterning is applied to the balloon surface to enhance friction, then the friction is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The micropatterning process divides the balloon surface into discrete protrusion elements arranged in arrays, allowing standardized manufacturing of individual features that collectively provide enhanced friction without requiring ultra-precise continuous surface control
Solution Approach 2:
The invention controls friction by varying parameters such as protrusion height, diameter, spacing, and material composition rather than requiring extremely precise control of continuous surface geometry, making manufacturing more feasible
3Reliability
If an implant is anchored to surrounding tissues, then the reliability is improved, but tissue damage increases
Solution Approach 1:
The micropatterned protrusions concentrate anchoring forces at specific localized contact points on the tissue surface rather than distributing stress across a broad area, improving grip while minimizing overall tissue disruption
Solution Approach 2:
The patterned balloon acts as an intermediary device between the implant and surrounding tissue, providing a compliant interface that distributes and modulates anchoring forces to reduce peak stresses on delicate tissue structures
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 patterned balloon device effectively reduces the need for surgical interventions and implant replacement by securely anchoring medical implants within the body, minimizing displacement and associated complications.
Implementation Method 1
The external pattern can provide enhanced friction and anchoring in an aqueous environment
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2
AI summary
Implanted medical devices need a mechanism of immobilization to surrounding tissues, which minimizes tissue damage while providing reliable long-term anchoring. This disclosure relates to techniques for patterning arbitrarily shaped 3D objects and to patterned balloon devices having micro-or nano-patterning on an outer surface of an inflatable balloon. The external pattern can provide enhanced friction and anchoring in an aqueous environment. Examples of these types of patterns are hexagonal arrays inspired by tree frogs, corrugated patterns, and microneedle patterns. The patterned balloon devices can be disposed between an implant and surrounding tissues to facilitate anchoring of the implant.