Offset Cannula Suction Device for Laparoscopic Clogging
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Solution Overview
Problem
Current suction devices, particularly those used in laparoscopic procedures, face challenges in effectively removing tissues and fluids from surgical sites without clogging, which limits their efficiency and effectiveness.
Innovation Solution
A suction device design featuring an offset inner cannula within an outer cannula, combined with a vacuum and irrigation fluid supply system, that creates multiple suction volumes and includes ergonomic features for easy handling, helps prevent clogging by facilitating the breakdown of blockages and efficient fluid management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single cannula design is used, then the device structure is simple, but it is prone to clogging and ineffective at removing tissues and fluids
Solution Approach 1:
The suction device divides the single cannula into multiple separate cannulae (outer cannula and inner cannula) that operate independently. Each cannula has its own suction opening, allowing them to function as separate pathways for fluid and tissue removal, thereby reducing clogging while maintaining manageable structural complexity
Solution Approach 2:
The inner cannula is positioned within the outer cannula, creating a nested configuration where the smaller cannula fits inside the larger one. This nesting arrangement allows multiple suction pathways to coexist in a compact structure, improving clogging resistance without significantly increasing the overall device footprint or operational complexity
2Reliability
If the inner cannula is aligned with the outer cannula inlet, then the structure is straightforward, but it is more prone to clogging
Solution Approach 1:
The inner cannula is deliberately offset from the outer cannula inlet rather than being aligned centrally. This asymmetric positioning creates a staggered arrangement where the suction openings are at different locations and angles, preventing simultaneous blockage and improving tissue breakdown efficiency while adding only minimal positioning complexity
3Productivity
If multiple suction volumes are created, then tissue and fluid removal effectiveness is improved, but the device complexity increases
Solution Approach 1:
The suction system is segmented into multiple independent suction volumes, each generated by separate cannulae with distinct suction openings. This segmentation allows simultaneous operation of multiple suction pathways, increasing overall productivity in tissue and fluid removal while keeping each individual suction volume manageable in size
Solution Approach 2:
Multiple suction volumes are created through the nested arrangement of inner and outer cannulae, where each cannula contributes its own suction volume. This nested configuration efficiently packs multiple functional elements into a compact structure, enhancing productivity without proportionally increasing device 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 device enhances the removal of tissues and fluids by generating effective negative pressure and diluting bodily fluids, reducing the risk of clogging and improving surgical site clearance.
Implementation Method 1
A suction device design featuring an offset inner cannula within an outer cannula, combined with a vacuum and irrigation fluid supply system, that creates multiple suction volumes
Implementation Method 2
The device enhances the removal of tissues and fluids by generating effective negative pressure and diluting bodily fluids
Data Source
AI summary
An embodiment includes a suction device handle for use with a vacuum supply conduit to suction a fluid or tissue, the handle comprising: a hand-grippable body defining a chamber; the hand-grippable body comprising a distal end configured to support a suction tip; the suction tip including a distal end of a vacuum supply conduit extending within an outer cannula, the vacuum supply conduit being offset from a distal end of the outer cannula by a predetermined distance; wherein the distal end of the hand grippable body is connected to a proximal end of the outer cannula and the chamber is connected in fluid communication with the suction pressure or vacuum generated at the distal end of the vacuum supply conduit. Additional embodiments are described herein.