Electrosurgical Wand Aperture Segmentation for Clogging Reduction
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Solution Overview
Problem
Existing electrosurgical systems face limitations in efficiently removing tissue during surgical procedures, particularly due to restricted aperture sizes and inadequate vacuum control, which can lead to clogging and reduced effectiveness in tissue ablation and aspiration.
Innovation Solution
The electrosurgical system employs a wand with a flexible multi-conductor cable and a peristaltic pump for volume-controlled aspiration, featuring a distal end with a non-conductive spacer supporting active and return electrodes, and strategically designed apertures and standoffs to manage plasma formation and tissue disintegration, allowing for larger aperture sizes and improved fluid dynamics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If smaller aperture sizes are used in existing electrosurgical systems, then tissue ablation precision is maintained, but aspiration efficiency decreases and clogging risks increase
Solution Approach 1:
The aperture is divided into multiple segments or zones with different functions. The distal aperture allows larger particles to pass through while the proximal aperture provides additional filtration, preventing clogging while maintaining high aspiration efficiency.
Solution Approach 2:
The system transitions from a single aperture design to a multi-aperture configuration arranged in specific spatial dimensions. This dimensional arrangement allows optimized flow paths that prevent clogging while maintaining high productivity.
2Object-affected harmful factors
If larger aperture sizes are used, then clogging risks are reduced, but tissue ablation precision and plasma stability are compromised
Solution Approach 1:
Different regions of the wand tip have different aperture characteristics. The distal aperture is positioned and sized to maintain plasma stability and ablation precision, while the proximal aperture is optimized for preventing clogging, allowing each region to perform its specific function optimally.
Solution Approach 2:
The multi-aperture configuration acts as an intermediary system between the tissue ablation zone and the aspiration system. It mediates between the conflicting requirements of plasma stability and clogging prevention by providing multiple flow paths with different characteristics.
3Ease of operation
If traditional vacuum control is used, then system simplicity is maintained, but aspiration volume control and fluid dynamics are inadequate
Solution Approach 1:
The system uses dynamic control of aspiration volume through the multi-aperture configuration, allowing adjustment of fluid flow characteristics. The peristaltic pump provides variable speed control to optimize aspiration efficiency for different tissue types and surgical conditions.
Solution Approach 2:
The system employs a peristaltic pump to create controlled negative pressure for aspiration, replacing traditional vacuum control. This pneumatic approach provides precise volume control and improved fluid dynamics for enhanced tissue removal efficiency.
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
This configuration enables efficient tissue removal by creating a stable plasma for molecular dissociation, reducing clogging risks and enhancing aspiration efficiency, allowing for larger aperture sizes and improved tissue disintegration without compromising surgical precision.
Implementation Method 1
creating a plasma proximate to an active electrode disposed at the distal end of an electrosurgical wand
Implementation Method 2
enables efficient tissue removal by creating a stable plasma for molecular dissociation
Implementation Method 3
The controller includes a peristaltic pump configured to draw fluid through a aperture in the active electrode
Implementation Method 4
use high frequency electrical energy to remove soft tissue such as sinus tissue, adipose tissue or other tissue
Data Source
AI summary
Electrosurgical wands. At least some of the illustrative embodiments are electrosurgical wands having features that reduce contact of tissue with an active electrode of a wand, decrease the likelihood of clogging, and/or increase the visibility within surgical field. For example, wands in accordance with at least some embodiments may comprise standoffs, either along the outer perimeter of the active electrode, or through the main aperture in the active electrode, to reduce tissue contact. Wands in accordance with at least some embodiments may implement slots on the active electrodes to increase bubble aspiration to help keep the visual field at the surgical site clear. Wands in accordance with at least some embodiments may implement aspiration flow pathways within the wand that increase in cross-sectional area to reduce the likelihood of clogging.