Bioabsorbable Nasal Valve Spreader Graft for Rhinoplasty
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Solution Overview
Problem
Conventional spreader grafts used in nasal reconstruction procedures face challenges such as the need for autologous cartilage harvesting, increased surgical pain and duration, and the risk of complications like infection and extrusion, particularly due to their non-absorbable nature.
Innovation Solution
Development of bioabsorbable nasal valve spreader graft devices made from polymers like poly(p-dioxanone) and poly(glycolide-co-lactide) with tissue ingrowth substrates, featuring a core plate and spreader plate members secured by snapping pins, designed to provide structural support and promote tissue ingrowth without permanent foreign materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional non-absorbable spreader grafts are used, then structural support is provided, but risk of complications such as infection and extrusion increases
Solution Approach 1:
The patent changes the material parameter from non-absorbable to absorbable polymer, transforming the graft from a permanent implant to a temporary structural support that is gradually replaced by host tissue, thereby reducing long-term complication risks while maintaining initial structural support
Solution Approach 2:
The absorbable graft is designed to be temporarily discarded by the body's metabolic processes, with the polymer gradually breaking down and being absorbed, allowing host tissue to recover and take over the structural support function
2Quantity of substance
If autologous cartilage is harvested for spreader grafts, then graft material is obtained, but donor side morbidity and surgical pain increase
Solution Approach 1:
The patent replaces valuable autologous cartilage with a synthetic absorbable polymer that serves its structural support function temporarily and then degrades, eliminating the need for cartilage harvesting and associated donor site morbidity
Solution Approach 2:
The absorbable polymer acts as an intermediary material that temporarily provides structural support during healing and then disappears, replacing the need for permanent autologous cartilage grafts and avoiding donor site trauma
3Reliability
If multi-layer bioabsorbable structure is used, then tissue ingrowth is promoted and structural support is improved, but device complexity increases
Solution Approach 1:
The patent applies different properties to different layers: the first layer provides initial structural support with specific mechanical properties, while the second layer is optimized for tissue ingrowth with porous structure, creating local quality variations that address different functional requirements
Solution Approach 2:
The patent combines multiple polymer layers with different characteristics (one optimized for strength, another for tissue ingrowth) into a composite structure, achieving superior overall performance that neither single material could provide alone
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
These bioabsorbable grafts offer improved structural support, minimize long-term complications, and facilitate easier implantation, providing superior results by gradually absorbing and allowing tissue ingrowth, thus reducing surgical trauma and post-operative issues.
Implementation Method 1
The devices are made from a bioabsorbable polymer
Implementation Method 2
gradually absorbing and allowing tissue ingrowth
Implementation Method 3
promote tissue ingrowth
Data Source
AI summary
Novel bioabsorbable, nasal spreader graft implant devices are disclosed. The devices are useful in rhinoplasty and nasal reconstruction surgical procedures, as well as other surgical procedures. The devices have biodegradable core plates and biodegradable spreader plates or tissue ingrowth plates. The plates may have tissue ingrowth properties.