Annular Adhesive Structure for Tissue Bonding
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Solution Overview
Problem
Current surgical techniques for joining tissue, such as suturing and stapling, often result in trauma, leakage, bleeding, and stricture, particularly in procedures like end-to-end bowel anastomosis, where there is a need for a method that reduces these issues and maintains the patency of tubular organs over time.
Innovation Solution
The use of support structures containing adhesive compositions that can be deployed between tissue sections, either with or without staples, to provide a strong bond and reduce trauma, leakage, and bleeding, utilizing bio-absorbable materials and two-part adhesive systems that expand or deploy to secure the tissue in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional suturing or stapling techniques are used to join tissue, then the tissue can be bonded together, but trauma, leakage, and bleeding occur at the joining site
Solution Approach 1:
The patent replaces mechanical joining methods (suturing and stapling) with a chemical bonding method using adhesive compositions. The adhesive is delivered through a catheter and applied directly to the tissue surfaces, creating a bond without mechanical penetration or compression that causes trauma. This substitution of mechanical systems with chemical bonding resolves the contradiction by eliminating physical damage while maintaining bonding reliability.
Solution Approach 2:
The adhesive composition acts as an intermediary substance between the two tissue surfaces to be joined. Rather than directly pressing or piercing the tissues together, the adhesive mediates the bonding process by forming a chemical bridge between tissue surfaces. This intermediary approach allows tissue joining without the direct mechanical contact that causes trauma, leakage, and bleeding.
2Productivity
If surgical staples are used to join tissue sections, then the joining process is faster and more efficient, but foreign body reactions and potential leakage occur
Solution Approach 1:
The patent employs a disposable catheter-based adhesive delivery system that is used once and then discarded. The adhesive itself is designed to be temporarily present during the healing process and then naturally degraded or absorbed by the body. This approach eliminates permanent foreign bodies like metal staples that cause chronic reactions, while still providing the rapid initial bonding needed for efficient surgery.
Solution Approach 2:
The adhesive composition undergoes parameter changes from a deliverable liquid or paste form through the catheter to a cured solid state that provides strong bonding. The adhesive transitions from a fluid state suitable for injection and spreading to a solid state that provides structural support, then eventually degrades back to soluble components. These parameter changes allow rapid bonding without permanent foreign material, resolving the contradiction between speed and foreign body reaction.
3Object-affected harmful factors
If adhesive compositions are used to bond tissue, then trauma and foreign body reactions are reduced, but the adhesive must be precisely delivered and positioned
Solution Approach 1:
The catheter-based delivery system is designed to perform multiple functions: it delivers the adhesive composition, positions it precisely at the target site, controls the flow rate, and can be removed after delivery. This multi-functional design consolidates what could be multiple separate devices into one universal tool, making the overall process simpler despite the precision requirements. The same device that delivers the adhesive also ensures its proper positioning and controlled application.
Solution Approach 2:
The adhesive composition is delivered in a segmented or controlled manner through the catheter, allowing precise placement at specific locations on the tissue. The delivery system can be segmented into different functional zones (delivery tip, flow control mechanism, etc.) that work together to achieve precise positioning. This segmentation allows complex precise delivery to be achieved through coordinated simple components, resolving the contradiction between trauma reduction and delivery complexity.
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 described method effectively reduces trauma, leakage, and bleeding while creating a strong bond between tissue sections, maintaining the patency of tubular organs and facilitating healing by using bio-absorbable support structures and adhesives that secure the tissue without causing foreign body reactions.
Implementation Method 1
support structures containing adhesive compositions that can be deployed between tissue sections, either with or without staples, to provide a strong bond
Data Source
AI summary
An apparatus for forming an anastomosis between adjacent intestinal sections of tissue is provided. The apparatus includes a circular surgical stapler having an anvil assembly with an anvil shaft and an anvil, the circular surgical stapler further having a tubular body portion with an annular knife and a body portion shaft selectively attachable to the anvil shaft; and a seal structure for deposition between the intestinal sections of tissue including a hub configured to engage attachment structure on at least one of the anvil shaft and the body portion shaft. The attachment structure is positioned so that the seal structure is located between the intestinal sections of tissue when the circular surgical stapler is disposed within the intestinal sections of tissue.