Multi-Cannula Trocar System for Minimizing Tissue Trauma
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Solution Overview
Problem
Traditional trocars for surgical access cause tissue damage and scarring due to their large outer diameter and require incisions, limiting their use in minimally invasive surgeries and affecting aesthetics.
Innovation Solution
A trocar system with multiple thin cannulas and a mandrel assembly that minimizes tissue trauma, allowing for multiple entry points without scarring, featuring a sleeve with connected cannulas, a detachable mandrel, and a dilator to maintain access ports, which can be used in various surgical procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a single thick cannula is used for surgical access, then the structural strength and stability are improved, but the tissue damage and scarring increase
Solution Approach 1:
The single thick cannula is divided into multiple thin cannulas (first cannula, second cannula, third cannula, fourth cannula) that are arranged in a cluster. Each thin cannula causes minimal tissue trauma individually, while the clustered arrangement provides the necessary structural strength and stability for surgical access. The mandrel assembly with multiple piercing tips simultaneously inserts these cannulas through the tissue.
Solution Approach 2:
Multiple thin cannulas are combined into a single integrated trocar assembly with a common base and handle. The cannulas are grouped together and inserted through a single incision site, merging the function of multiple access points while minimizing the overall tissue disruption compared to separate insertions. The clustered arrangement allows the cannulas to share the load and provide collective structural support.
2Ease of operation
If a large caliber cannula is used, then the surgical accessibility is improved, but the incision size and scarring increase
Solution Approach 1:
The surgical access is segmented into multiple small cannula openings instead of a single large opening. Each cannula has a small outer diameter that causes minimal scarring, while the multiple cannulas collectively provide adequate surgical accessibility by allowing insertion of various surgical instruments, cameras, and suction devices through the clustered ports.
Solution Approach 2:
The solution transitions from a single-dimensional large opening to a multi-dimensional clustered arrangement of small openings. The cannulas are positioned at different angles and orientations within the cluster, providing three-dimensional surgical access comparable to a single large cannula while maintaining small individual incision sizes that heal by first intention without visible scarring.
3Adaptability or versatility
If multiple cannulas are used for multiple entry ports, then the surgical versatility is improved, but the device complexity increases
Solution Approach 1:
Multiple cannulas are merged into a single integrated trocar assembly with a common base, handle, and mandrel mechanism. The base contains lumens that receive and guide each cannula, while the handle provides a single operational interface for controlling the insertion and removal of all cannulas simultaneously. This merging reduces the complexity of handling multiple separate devices while maintaining the versatility of multiple entry ports.
Solution Approach 2:
The trocar assembly is designed as a universal platform that can accommodate different types of surgical instruments through its multiple cannulas. The base and handle are configured to work with various cannula sizes and configurations, allowing the same device to be used for different surgical procedures and access requirements. The modular design enables adaptation to different surgical needs without requiring completely different devices.
Data Source
AI summary
An invention for transfixing a plurality of cannulas 14 through a tissue 25 for providing a plurality of entry-ports 33 to a surgical site 26, comprising: a base 10; and a plurality of cannulas 14 connected to said base 10; wherein each said cannula 14 includes an access-port 3, is provided. Also, the invention for transfixing a plurality of cannulas 14 through a tissue 25 for providing a plurality of entry-ports 33 to a surgical site 26, comprising: a sleeve 9 including a base 10; said sleeve 9 including a plurality of cannulas 14 connected to said base 10; a mandrel 1 including a handle 7; and said mandrel 1 including a plurality of piercing tips 2 connected to said handle 7; wherein said mandrel 1 detachably engage said sleeve 9 forming a single punch assembly; wherein said cannula 14 includes an access-port 3 to a surgical site 26, is provided.