Bioabsorbable Vascular Closure Structure for Self-Sealing Implantation
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Solution Overview
Problem
Existing vascular closure devices are not easily implantable and do not provide an effective seal in the vasculature to prevent leakage or infection, necessitating improved designs for surgical applications.
Innovation Solution
A bioabsorbable, distensible closure device with a disk-shaped body and a hole that transitions between open and closed configurations, facilitated by a bioabsorbable material with stored length and pleats, and optionally an adhesive and extension for self-sealing, is used in conjunction with a pusher sleeve and introducer for implantation and closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a closure device is designed to be easily implantable, then the implantation process becomes simpler, but the sealing effectiveness may be compromised
Solution Approach 1:
The closure device incorporates a distensible body that can dynamically change its configuration between open and closed states. The body is designed to be distensible so as to define the hole having an open position when the hole is presented with a force and a closed position when the force is absent, allowing the device to adapt its shape during implantation and sealing processes
Solution Approach 2:
The device utilizes changes in physical parameters of the bioabsorbable material to achieve sealing. The material properties are designed to allow the body to transition between configurations based on applied forces, with the stored length facilitating recovery from open to closed position, effectively changing the sealing parameter from open to closed state
2Reliability
If a closure device provides an effective seal to prevent leakage, then sealing reliability improves, but the device complexity increases
Solution Approach 1:
The closure device is designed to seal automatically through its own structural properties without requiring complex external mechanisms. The bioabsorbable body with stored length and distensible characteristics enables self-sealing by naturally transitioning to a closed configuration when the introducer is removed, eliminating the need for additional sealing components or complex actuation systems
Solution Approach 2:
The device employs a flexible bioabsorbable body that can deform and conform to the vascular wall. This flexible structure allows the device to achieve effective sealing through simple geometric transformation rather than complex mechanical components, maintaining low device complexity while ensuring reliable closure
3Strength
If a non-bioabsorbable material is used for the closure device, then device strength is maintained, but tissue compatibility and healing are reduced
Solution Approach 1:
The closure device utilizes bioabsorbable materials that provide sufficient mechanical strength during the critical early healing period and then gradually degrade as tissue regeneration progresses. The bioabsorbable body is designed to maintain structural integrity when needed while being biocompatible and supportive of tissue ingrowth, eliminating the harmful effects of permanent foreign bodies
Solution Approach 2:
The device is designed to be temporarily present and then discarded by the body's natural processes. The bioabsorbable material allows the device to fulfill its sealing function and then be gradually absorbed and replaced by native tissue, providing both necessary strength during use and long-term tissue compatibility through controlled degradation
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 device provides a self-sealing mechanism that effectively reduces fluid leakage and supports tissue ingrowth, ensuring a secure and healing-friendly closure in vascular procedures.
Implementation Method 1
the body is distensible so as to define the hole having an open position when the hole is presented with a force and a closed position when the force is absent
Implementation Method 2
the bioabsorbable material has a property of stored length operable to effectuate recovery of the hole from the open position to the closed position
Implementation Method 3
the stored length is facilitated by defining the bioabsorbable material with micro-pleats that allow for elongation and contraction
Implementation Method 4
the implantable closure device includes an adhesive applied to the body
Data Source
AI summary
An implantable closure device includes a body comprising a bioabsorbable material and defining generally a disk-shape having a hole. The body is distensible so as to define the hole having an open position when the hole is presented with a force and a closed position when the force is absent.