Telescoping Electrosurgical Pencil for Smoke Evacuation Visibility
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Solution Overview
Problem
Existing electrosurgical pencils face challenges in balancing the positioning of smoke evacuation shrouds close to the tip while maintaining a telescoping function, which affects visibility and efficiency during surgical procedures.
Innovation Solution
An electro-surgical pencil design featuring a telescoping tube and movable suction tip that allows adjustable positioning of the electrode and suction tip relative to the housing, enabling efficient smoke removal and improved visibility by varying the coverage of the electrode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the suction tip is positioned close to the electrode tip for efficient smoke evacuation, then smoke removal efficiency is improved, but visibility of the electrode tip is reduced
Solution Approach 1:
The suction tip is made movable relative to the electrode through a telescoping mechanism, allowing dynamic adjustment between close positioning (for smoke evacuation) and distant positioning (for visibility). This resolves the contradiction by enabling the system to switch between the two opposing requirements based on surgical needs.
2Length of moving object
If the pencil length is adjusted by replacing electrodes of different lengths, then the length requirement is met, but operational time is lost and complexity increases
Solution Approach 1:
The pencil incorporates a telescoping tube that can extend and retract to provide variable length without requiring electrode replacement. This dynamic length adjustment mechanism eliminates the time loss and complexity associated with swapping electrodes while maintaining the ability to adapt to different surgical requirements.
Solution Approach 2:
The single electrode is made to serve multiple length requirements through the telescoping mechanism, rather than requiring multiple electrodes of different lengths. This multi-functionality approach reduces the number of components needed and eliminates replacement operations.
3Adaptability or versatility
If a fixed-length pencil design is used, then device complexity is reduced, but adaptability to different surgical needs is limited
Solution Approach 1:
The telescoping mechanism provides dynamic adjustability in both length and suction tip position, enabling the pencil to adapt to various surgical requirements. The mechanical telescoping design achieves this adaptability while maintaining relatively simple construction through the use of nested tubular structures.
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 ability to adjust the length and position of the pencil and suction tip independently, improving ergonomic handling and visibility, while maintaining efficient smoke evacuation around the electrode tip.
Implementation Method 1
a suction tip attached to the tube and forming a further extension of the suction passage and being configured for telescoping movement relative to the tube to cover a larger or lesser portion of the electrode
Data Source
AI summary
An electro-surgical pencil comprising: a housing forming an axially extending main suction passage from a proximal opening to a distal opening; a tube forming an extension of the main suction passage from the proximal opening to a proximal extension opening, the tube being configured for telescoping movement through the proximal opening; an electrode for cutting and/or coagulating tissue, the electrode being attached to the tube and extending axially from the proximal extension opening; and a suction tip attached to the tube and forming a further extension of the suction passage. Since both the tube and the suction tip are movable relative to the housing, a short and a long configuration can be obtained while good smoke removal capabilities are maintained.