Endoscopic Sheet Applicator for Wet Tissue Hemostasis
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Solution Overview
Problem
Existing methods for applying tissue healing agents to wet tissue surfaces, such as gels and powders, face challenges with adherence and controlled delivery, particularly during endoscopic procedures, as they tend to drip or spread uncontrollably, and there is no effective method for applying polymer sheets.
Innovation Solution
A device with a flexible delivery element, movable between closed and open configurations, is used to apply a tissue healing agent in sheet form, which can conform to tissue surfaces and includes a release mechanism for controlled application, allowing the agent to adhere and be removed efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gel material is delivered through an endoscopic catheter, then the material can be applied to tissue, but the gel may not adhere sufficiently to wet tissue and may drip away from the intended site
Solution Approach 1:
The patent uses a flexible polymer sheet as the delivery medium instead of gel. The sheet can be advanced through the catheter in a compressed state and then expanded at the target site to conform to the tissue surface, providing reliable adherence without dripping. The sheet structure inherently prevents the material from detaching and dripping away.
Solution Approach 2:
The patent transforms the physical state of the healing agent from gel to sheet form. This parameter change allows the material to maintain its integrity during delivery and application, enabling it to adhere to wet tissue surfaces without the dripping problem associated with gel formulations.
2Ease of operation
If powder material is delivered, then the material can be applied to tissue, but the delivery is wide-spread and somewhat uncontrolled
Solution Approach 1:
The flexible polymer sheet provides a controlled, localized delivery mechanism. Unlike powder that disperses widely, the sheet can be precisely positioned and advanced to the target site through the catheter, ensuring controlled application to the specific tissue area requiring treatment.
Solution Approach 2:
The healing agent is segmented into a discrete sheet form rather than being delivered as dispersed powder particles. This segmentation allows for precise control of the delivery location and amount, preventing wide-spread uncontrolled application while maintaining ease of operation through the catheter system.
3Length of moving object
If a sheet-shaped therapeutic substance is stored in a catheter, then the device can be inserted through the catheter, but the sheet must be compressed which may affect its structural integrity
Solution Approach 1:
The polymer sheet is designed with dynamic mechanical properties that allow it to transition between compressed and expanded states. During insertion, the sheet is compressed to fit through the catheter; upon deployment, it expands to its full structural form. This dynamic behavior enables both catheter insertion and maintenance of structural integrity at the target site.
Solution Approach 2:
The flexible polymer sheet can be compressed during insertion through the catheter and then expanded at the target site. The flexibility of the sheet allows it to deform during compression without permanent damage, while maintaining sufficient structural integrity when expanded to deliver the therapeutic effect.
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 ensures controlled and adhesive application of tissue healing agents to wet tissue surfaces, promoting hemostasis and healing by conforming to tissue shapes and facilitating easy removal.
Implementation Method 1
a delivery element including a first surface and a second surface opposing one another, the delivery element movable between a closed configuration, in which the delivery element is compressed to be received within the channel, and an open configuration, in which the delivery element is substantially planar
Data Source
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AI summary
The present invention relates to a device for applying a tissue healing agent, comprising: an insertion member extending longitudinally from a proximal end to a distal end and including a channel extending therethrough; a delivery element including a first surface and a second surface opposing one another, the delivery element movable between a closed configuration, in which the delivery element is compressed to be received within the channel, and an open configuration, in which the delivery element is substantially planar; and a first tissue healing agent formed in a sheet configuration and disposed on the first surface of the delivery element, further comprising a release mechanism for releasing the first tissue healing agent from the first surface of the delivery element, wherein the release mechanism includes an element slidable along the first surface between the first surface and the first tissue healing agent.