Multi-lumen Trocar Coupling Ratcheting Clutch Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current coupling systems for connecting multi-lumen tube sets to surgical access devices in laparoscopic surgery require precise alignment and dexterity, leading to time-consuming and challenging connections.
Innovation Solution
A coupling system featuring a ratcheting clutch mechanism and annular gripping collar for rotational engagement, ensuring a predetermined torque is applied during connection, facilitating easier and more secure attachment of multi-lumen tube sets to surgical devices like trocars.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a threaded connection with precise alignment is used to connect the tube set to the surgical access device, then the connection reliability is improved, but the connection time and operational complexity increase
Solution Approach 1:
The coupling system divides the connection interface into separate male and female components with distinct alignment features. The tube set coupling includes an outer coupling member with a male connector that has radially spaced alignment pins, while the surgical access device has a female connector with corresponding recesses. This segmentation allows each component to be independently manufactured and assembled, reducing overall connection time while maintaining reliability through the distributed alignment features.
Solution Approach 2:
The coupling system incorporates pre-formed alignment pins and recesses that are manufactured into the components before assembly. These alignment features are preliminarily positioned to guide the connection process, eliminating the need for manual alignment during surgery. The ratcheting clutch mechanism is also pre-configured to automatically engage when the alignment features match, ensuring reliable connection without requiring precise manual alignment during the procedure.
2Reliability
If a threaded connection requiring dexterity is used, then the connection security is improved, but the ease of operation deteriorates
Solution Approach 1:
The coupling system employs self-aligning features where the alignment pins automatically guide the male connector into the correct position within the female connector. The ratcheting clutch mechanism is self-actuating, engaging automatically when the connectors are brought together and providing tactile feedback to confirm secure connection. This eliminates the need for manual threading or complex alignment maneuvers, making the connection process intuitive and easy to perform even in constrained surgical environments.
Solution Approach 2:
The alignment pins act as intermediary elements that mediate between the male and female connectors during the connection process. These pins physically guide the connectors into proper alignment and maintain the correct relative position during assembly. The ratcheting clutch mechanism serves as an intermediary that transfers and secures the connection force, providing a mechanical intermediary that ensures secure attachment without requiring direct manual manipulation of threaded components.
3Reliability
If multiple alignment features are incorporated to ensure proper connection, then the manufacturing precision requirements increase, but the connection reliability improves
Solution Approach 1:
The coupling system concentrates alignment functionality at specific localized points rather than requiring uniform precision across the entire connection interface. The alignment pins are localized features with simple geometric shapes that are easier to manufacture with high precision compared to complex threaded interfaces. Each pin and recess pair represents a localized alignment zone that can be independently manufactured and inspected, reducing the overall manufacturing complexity while maintaining high connection reliability.
Solution Approach 2:
The coupling system uses asymmetric alignment features where the male connector has protruding pins and the female connector has corresponding recesses, rather than using symmetric threaded interfaces. This asymmetric design simplifies the manufacturing of each individual component while ensuring proper orientation and alignment during assembly. The asymmetric pin-and-recess configuration provides unambiguous alignment in multiple directions simultaneously, achieving high connection reliability without requiring extremely tight manufacturing tolerances across the entire assembly.
Data Source
AI summary
A coupling system is provided for connecting a tube set to a trocar that includes a multi-lumen trocar having a housing that includes a connector, wherein the connector has a plurality of coaxial flow passages defined therein by a plurality of concentric annular walls, a multi-lumen tube set including a plurality of tubes arranged in a parallel relationship, and a coupling including a generally cylindrical body having a first end portion configured to selectively mate with the coaxial flow passages of the connector of the trocar and a second end portion configured for attachment to the parallel tubes of the tube set.
