Ligation Cartridge with Adjustable Suture Loop for Tissue Stabilization
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Solution Overview
Problem
Current surgical techniques for tubular tissue ligation, such as using staples, clips, and knots, face challenges like tissue damage, leakage, and require technical expertise, often resulting in adverse events like perforation and bleeding due to inconsistent application and difficulty in accommodating varying tissue sizes and wall thicknesses.
Innovation Solution
A cartridge-based system that allows single-handed ligation with adjustable diameter accommodation, stabilizing both the ligature loop and tissue, enabling precise placement of knots with adjustable tension to create a consistent stump length, reducing the need for multiple instruments and minimizing tissue damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If clips or staples are used for ligation, then the ligation process is simplified, but tissue damage and adverse events increase
Solution Approach 1:
The suture system is designed to be self-retaining through the surgeon's own tissue, eliminating the need for foreign objects like clips or staples. The suture loop catches and holds itself within the tissue wall, making the system self-sufficient and avoiding tissue damage from metallic foreign bodies
Solution Approach 2:
The invention extracts and eliminates the need for clips, staples, or other foreign objects from the ligation process. By using only suture material that integrates with the tissue, the harmful foreign objects are completely removed from the surgical field
2Reliability
If manual knot tying is used, then ligation can be performed, but the process is slow and requires significant skill
Solution Approach 1:
The suture is pre-configured with a loop and tail in specific lengths and configurations before surgery. The surgeon simply needs to pass the needle and pull the pre-prepared loop through, eliminating the need for complex manual knot-tying procedures during surgery
Solution Approach 2:
The invention creates a simplified copy or model of the traditional knot-tying process using pre-formed suture loops and tails that automatically create the necessary tension and securement without requiring skilled manual manipulation
3Reliability
If traditional ligation devices are used, then ligation can be performed, but proper placement is difficult due to space constraints and tissue instability
Solution Approach 1:
The suture system is designed to work locally at the dissection site with specific tissue characteristics. The suture loop is sized and configured to match the local tissue wall thickness and diameter, ensuring proper placement without requiring complex device manipulation in constrained spaces
Solution Approach 2:
The suture material acts as an intermediary between the surgeon's needle and the tissue structure. The pre-formed loop and tail configuration mediates the interaction, making placement intuitive and reliable even in difficult surgical fields
4Reliability
If clips or staples are used, then ligation can be achieved, but the size often does not match the tubular structure being ligated
Solution Approach 1:
The suture loop and tail lengths can be adjusted and customized to match the specific diameter and wall thickness of the tubular structure being ligated. This dynamic adaptability allows the same suture system to effectively ligate structures of varying sizes without requiring multiple fixed-size devices
Data Source
AI summary
Cartridges and methods for ligation or dissection and ligation of tubular tissue structures are described. The cartridges and methods provide a means for efficient dissection and application of one or more ligatures by a single user using a single cartridge resulting in effective closure of a vessel or other tubular tissue structure by placement of a ligature at the desired location resulting in the desired tissue margin or stump.