Offset Inner 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 due to clogging issues and inefficiencies in suction processes.
Innovation Solution
A suction device design featuring an offset inner suction tube within an outer tube, combined with a vacuum and irrigation fluid supply system, which includes a chamber for generating suction and a recessed inner cannula tip to prevent blockages, allowing for efficient fluid and tissue removal while minimizing clogging risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inner suction tube is offset from the inlet of the outer tube, then the risk of clogging is reduced, but the suction efficiency may be compromised
Solution Approach 1:
The suction device is divided into separate inner and outer tubes with distinct functions. The inner tube handles suction while the outer tube manages fluid flow, allowing independent optimization of each component to resolve the contradiction between clogging resistance and suction efficiency.
Solution Approach 2:
The inner suction tube is positioned offset from the inlet along the longitudinal axis, creating a spatial separation that prevents direct alignment of suction path with fluid inlet. This dimensional offset allows the suction stream to be drawn from a different location, reducing clogging while maintaining effectiveness.
2Reliability
If the inner cannula tip is recessed inwardly from the outer cannula tip, then blockages are prevented, but the suction reach is reduced
Solution Approach 1:
The inner cannula tip is recessed specifically at the distal end while the proximal portion maintains its full length. This localized modification at the critical suction tip area prevents blockages without compromising the overall suction reach capability of the device.
Solution Approach 2:
The recessed inner cannula tip creates a preliminary clearance space before the suction action begins, preventing tissue or fluid accumulation at the tip. This pre-prepared geometry ensures smooth suction operation and reduces the risk of blockages during use.
3Adaptability or versatility
If a vacuum supply and irrigation fluid supply are integrated, then the suction device becomes more versatile, but the device complexity increases
Solution Approach 1:
The device integrates vacuum supply, irrigation fluid supply, and suction functionality into a single unified system. The common passage and chamber design allows all functions to share common components, reducing overall complexity while maintaining versatility.
Solution Approach 2:
The vacuum supply conduit, irrigation fluid supply conduit, and suction chamber are merged into an integrated assembly. The buttons and levers control multiple functions simultaneously, combining what could be separate devices into one unified tool.
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 design enhances the effectiveness of suction devices by reducing clogging risks and improving the removal of tissues and fluids, facilitating safer and more efficient surgical procedures.
Implementation Method 1
a vacuum supply conduit (18) connected to a vacuum supply (20)
Implementation Method 2
an irrigation fluid supply conduit (22) connected to a fluid supply (24)
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.