Offset Barrel Endoscopic Resection System
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Solution Overview
Problem
Current endoscopic tissue resection methods are invasive and imprecise, often causing unintended damage to healthy tissue due to the limited precision and size of cutting instruments, and require open surgical procedures for larger tissue resections.
Innovation Solution
An endoscopic tissue resection system comprising a proximal and distal barrel configuration with a radially offset central longitudinal axis, allowing a cutting member to be centered within the endoscope's working lumen for enhanced precision and rotation, and featuring a beveled distal region with viewing windows for visualization and a stop member to prevent over-advancement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a sharp, pointed and/or heated cutting instrument is advanced distal to the endoscope, then tissue cutting capability is achieved, but the risk of inadvertently cauterizing or searing healthy or non-target tissue increases
Solution Approach 1:
The cutting instrument is segmented into a cutting member and a support section with viewing windows. The support section acts as a protective barrier between the cutting member and surrounding healthy tissue, allowing visualization through the viewing windows while preventing inadvertent contact with non-target tissue.
Solution Approach 2:
The support section serves as an intermediary structure between the cutting member and the surrounding tissue environment. It provides a protective barrier that allows the cutting member to perform its function while preventing direct contact with healthy tissue, and the viewing windows in the support section enable visualization of the cutting process.
2Productivity
If the cutting instrument is moved in a circular motion to resect tissue, then tissue resection is achieved, but the risk of incision to unrelated tissue increases
Solution Approach 1:
The instrument is divided into a rotating cutting member and a stationary support section with viewing windows. The support section remains stationary and provides a stable reference frame and protective barrier, while only the cutting member rotates to perform the cutting action, reducing the risk to surrounding tissue.
Solution Approach 2:
The rotational motion is localized to the cutting member only, while the support section remains stationary. This localized motion concentrates the cutting action at the distal tip where the cutting member rotates, while the proximal support section provides stability and protection, allowing efficient resection with reduced risk to unrelated tissue.
3Measurement precision
If a biopsy needle is used to obtain tissue samples, then tissue sampling is achieved, but the size of tissue that can be resected is limited by the diameter of the working lumen
Solution Approach 1:
The cutting member is designed to rotate during operation, transforming from a static needle-like structure to a dynamic cutting tool. This rotational motion allows the cutting member to resect larger tissue segments beyond what a static biopsy needle could remove, while still passing through the same working lumen diameter.
Solution Approach 2:
The instrument transitions from a static configuration during insertion to a dynamic rotating configuration during cutting. The cutting member can be advanced to different rotational positions and the rotation speed can be controlled, allowing adaptation to different tissue sizes and types while maintaining compatibility with the endoscope working lumen dimensions.
Data Source
AI summary
The present embodiments provide apparatus for facilitating endoscopic resection of tissue. The apparatus comprises proximal and distal barrels. The proximal barrel is adapted to be coupled to an endoscope. A cutting member is disposed within a lumen of the distal barrel and configured to resect a segment of tissue. In one embodiment, a central longitudinal axis of the proximal barrel is radially offset from a central longitudinal axis of the distal barrel, thereby allowing the cutting member to be centered relative to the working lumen of the endoscope. Additionally, the cutting member may comprise at least one viewing window that permits endoscopic visualization of tissue distal to the distal barrel when the cutting member is disposed within the distal barrel.